Thompson Indicator Straight Line Motion
Product Code : JA-PLE-4149
The Thompson Indicator Straight Line Motion (SKU JA-PLE-4149) is a working model of the Thompson indicator linkage, one of a series of sixteen mechanisms built on A3 boards, for teaching how a linkage produces straight-line motion. This Thompson indicator mechanism model is used in theory of machines, engineering drawing and physics classes, and JaincoLab supplies it to polytechnics, colleges and TVET institutes.
Specifications
The model is built on an A3 white melamine board with principal links in amber-coloured Perspex pivoted on hollow rivets; the rivets take a pencil, so the loci of the joints can be traced onto a sheet of paper clipped to the board.
| Product | Thompson Indicator Straight Line Motion |
| SKU | JA-PLE-4149 |
| Board | A3, white melamine |
| Links | Amber-coloured Perspex |
| Pivots | Hollow rivets that accept a pencil for tracing loci |
| Linkage | Derived from the Scott Russell linkage; principal links AC and PB with a fixed pivot at P |
| Drive | Link driven by rod ED; point E moved by hand to simulate the engine piston |
| Suitable for | Classroom, drawing office or laboratory |
Applications of the Thompson indicator mechanism model
The Thompson indicator was devised to draw a graph of gas pressure in an engine cylinder against the stroke of the piston; on this board the student moves point E by hand, as the indicator piston would, and traces the paths of the joints to see how straight-line motion is produced.
- Studying straight-line mechanisms derived from the Scott Russell linkage
- Tracing the loci of the moving joints with a pencil through the hollow rivets
- Explaining how an engine indicator records cylinder pressure against piston stroke
- Theory of machines and engineering drawing classes in polytechnics, colleges and TVET institutes
Scope of supply and ordering
The listing covers the Thompson indicator straight-line motion mechanism mounted on its A3 board. Accessories, spares and quantities are confirmed on the quotation.
Minimum order quantity, lead time and packing are confirmed on each quotation according to the number of boards and the delivery destination. JaincoLab supplies single boards or several mechanisms together, such as the crank and slotted lever, for engineering colleges, polytechnics and TVET projects, including export orders to Africa, the Middle East and South and South-East Asia.
Frequently asked questions
What does the Thompson indicator model demonstrate?
It demonstrates how the Thompson indicator linkage, derived from the Scott Russell linkage, produces straight-line motion, as used to plot gas pressure against piston stroke.
What is the model made of?
The principal links are amber-coloured Perspex pivoted with hollow rivets on a white melamine A3 board.
Can the paths of the joints be recorded?
Yes. The hollow rivets accept a pencil, so the loci of the joints can be transferred to paper clipped to the board.
Related products
- Peaucellier Straight Line Motion
- James Watt Straight Line Motion
- Crank and Slotted Lever
- Simple Pantograph
Other mechanism boards and mechanics apparatus are listed in Physics Lab Equipments from JaincoLab, a physics lab equipment manufacturer in India.
Request a quote
To order the Thompson Indicator Straight Line Motion, send the quantity and delivery destination via the JaincoLab contact page or email [email protected]. Tender and project enquiries can be sent through the tenders page.
