Toggle With Single And Double Action Description and Specifications for Lab Tenders
Toggle With Single And Double Action.
Toggle With Single And Double Action Science Labs
Features
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
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 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.