Physics Mechanism Instruments

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for generating a straight line
• Three year warranty

Range of Experiments

• To determine the loci of the moving parts of the standard mechanism
• To establish the characteristics of that mechanism: for example to see which links move faster than other or whether a particular motion (such as a straight line) is developed

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

This early attempt to guide a point P on a machine to move in an approximate straight line consists of three links connected together with fixed pivots at A and D. The mid-point of BC is constrained to move in a nearly straight line.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Three year warranty

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for generating a straight line
• Three year warranty

Range of Experiments

• To determine the loci of the moving parts of the standard mechanism
• To establish the characteristics of that mechanism: for example to see which links move faster than others or whether a particular motion (such as a straight line) is developed

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

This mechanism consists of two links with one fixed pivot and one slider. The longer link AB has a pivot at its mid-point to which the shorter link is connected. Due to CD = BD = AD the geometry guarantees that as B moves toward C the point A must travel in a straight line.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

This ingenious mechanism was invented by Thompson in order to draw a graph of the gas pressure in an engine cylinder against the stroke of the piston. It is derived from the Scott Russell linkage, the principal links being AC and PB with a fixed pivot at P. The turning pair at A is restricted to moving along an arc as the link is driven by the rod ED. E is attached to a piston in a small cylinder connected to the expansion chamber of the engine, (simulated by moving E by hand).

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for generating a straight line
• Three year warranty

Range of Experiments

• To determine the loci of the moving parts of the standard mechanism
• To establish the characteristics of that mechanism: for example to see which links move faster than other or whether a particular motion (such as a straight line) is developed

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

The exact straight line produced by this set of eight links is achieved by the geometry of the mechanism. ABCD is a rhombus with four equal sides. Points O and P are fixed pivots while OP = OC. A is moved in a straight line as OC rotates.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for generating a straight line
• Three year warranty

Range of Experiments

• To determine the loci of the moving parts of the standard mechanism
• To establish the characteristics of that mechanism: for example to see which links move faster than other or whether a particular motion (such as a straight line) is developed.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for rotary to linear conversion
• Three year warranty

Range of Experiments

• To determine the loci of the moving parts of the standard mechanism
• To establish the characteristics of that mechanism: for example to see which links move faster than other or whether a particular motion (such as a straight line) is developed

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

This common mechanism is extensively used for converting rotary to reciprocating motion and vice versa. The connecting rod is attached at one end to a rotating arm and at the other to a combined slider and turning pair.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for generating Simple Harmonic motion
• Three year warranty

Range of Experiments

• To determine the loci of the moving parts of the standard mechanism
• To establish the characteristics of that mechanism: for example to see which links move faster than other or whether a particular motion (such as a straight line) is developed

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

A link that slides in two in-line guides has a right angled cross frame that contains a symmetrically disposed slot. A wheel whose centre is also on the centre line of the guides carries a pin that turns in a slider running in the slot. As the wheel turns the linear motion of the link is exactly simple harmonic. The amplitude can be varied by altering the radius of the pin.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for quick return motion
• Three year warranty

Range of Experiments

• To determine the loci of the moving parts of the standard mechanism
• To establish the characteristics of that mechanism: for example to see which links move faster than other or whether a particular motion (such as a straight line) is developed

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

This mechanism is designed to improve the productivity of a cutting machine by returning the tool at a faster rate than the work stroke. The length of stroke is also a variable depending on the length of the link OC. The tool is carried on the sliding ram in the guides and is driven by the link AB.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism fora quick return motion
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism
2. To establish the characteristics of that mechanism: for example to see which links move faster than other or whether a particular motion (such as a straight line) is developed

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

The Whitworth mechanism has a fixed ratio of cutting to return stroke because of the fixed distance OP. The crank has a pin C which can be set at a chosen radius to drive the slotted link thus varying the stroke. The tool is attached to the guided slider A.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for intermittent transport
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism
2. To establish the characteristics of that mechanism: for example to see which links move faster than othes or whether a particular motion (such as a straight line) is developed
   

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

The frame of the mechanism carries an eccentric cam on an axle O, a push rod CD in a guide A and a link DE with a fixed pivot at P. A spring holds the link against the cam and provides the force for the forward stroke. The return stroke is due to the cam acting against a pin at E.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for intermittent feed
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism
2. To establish the characteristics of that mechanism: for example to see which links move faster than othes or whether a particular motion (such as a straight line) is developed
   

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

A pair of gear whels pivoted at O and P run in mesh at the same speed. On one wheel a pivot carries a moving arm while a pin on the other wheel slides in a curved slot in the arm. An extension to the arm terminates in a fine claw which traces out a loop with a flat side each time the wheels make one revolution.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism foran operations gear
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism
2. To establish the characteristics of that mechanism: for example to see which links move faster than othes or whether a particular motion (such as a straight line) is developed
   

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

The toggle consists of the two links AB and BC, C being fixed while A is a slider. The joint B is driven by a crank and connecting rod which for a singl action limits B to the Line AC. By increasing the stroke B will travel past AC and hence produce a second advance of A per revolution.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for operating the wheels of a vehicle
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism
2. To establish the characteristics of that mechanism: for example to see which links move faster than othes or whether a particular motion (such as a straight line) is developed
   

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

The links of this mechanism simulate the steering gear of the wheels of a road vehicle. The stub axles of the wheels are connected by three links forming a trapezium in the straight ahead position. As the wheels turn the inner wheel turns more than the outer one thus having a common centre nearly in line with the vehicle rear axle.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for operating the rudder of a boat
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism.
2. To establish the characteristics of that mechanism: for example to see which links move faster than othes or whether a particular motion (such as a straight line) is developed.
   

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

The frame of the mechanism has a slot offset from a fixed pivot O. A slider P in the slot carries a link pinned to it while the other end of the link slides in a turning block at O. Hence a small effort at P will produce a large torque at O to drive the rudder of a boat.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism fordrawing a locus
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism
2. To establish the characteristics of that mechanism: for example to see which links move faster than othes or whether a particular motion (such as a straight line) is developed
   

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

The basis of this mechanism is two long links AB and BC with a fixed pivot at C. The two short links DE and DF form a rhombus BEDF. Any movement of D is copied to a magnified scale at A and vice versa to the reciprocal reduced scale.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for generating gear teeth profiles
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism
2. To establish the characteristics of that mechanism: for example to see which links move faster than othes or whether a particular motion (such as a straight line) is developed
   

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

The apparatus enables three cycloidal curves and an involute locus to be drawn. A point on the circumference of a circle is traced as the circle rolls along a straight line, the outside of a circular arc or the inside of a circle. The involute is generated by the locus of the end point of a straight line unwrapping itself from a cylinder.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.

• Low cost, effective teaching
• Self contained
• Easily seen from a distance
• Mechanism clearly understandable
• Loci drawn for further study
• Standard mechanism for generating an ellipse
• Three year warranty

Range of Experiments

1. To determine the loci of the moving parts of the standard mechanism
2. To establish the characteristics of that mechanism: for example to see which links move faster than othes or whether a particular motion (such as a straight line) is developed
   

Description

One of sixteen mechanisms built on an A3 board equally suitable for the classroom, drawing office or laboratory. The principal components are made from amber coloured Perspex, pivoted with hollow rivets, and mounted on a white melamine board for contrast and visibility. To see the mechanisms move is far more instructive and convincing than listening to a static lecture. The hollow rivets accept a pencil for transferring the loci of the joints to a sheet of paper, clipped to the board.

This apparatus provides two guide slots intersecting at their mid-points at 90 degrees to act as the base lines of the major and minor axes of an ellipse. A trammel bar equipped with two variable position sliders and an end point for tracing the locus enables an ellipse to be drawn.

This equipment is part of a range designed to both demonstrate and experimentally confirm basic engineering principles. Great care has been given to each item so as to provide wide experimental scope without unduly complicating or compromising the design. Each piece of apparatus is self-contained and compact. Setting up time is minimal, and all measurements are made with the simplest possible instrumentation, so that the student involvement is purely with the engineering principles being taught.

Each mechanism is supplied with a manual which gives full instructions for producing the loci and applications of the assembly. The typical graphical result is appended.