Improved Construction of Coin Freed Weighing Machine.
Year: 1899

page_text: Date of Application, 8th June, 1899-Accepted, 22nd July, 1899
COMPLETE SPECIFICATION.
Improved Construction of Coin Freed Weighing Machine.
I, JOHN TWEEDY SCOTT, of Etherland House, Devonshire Road, Blackheath,
Kent, Merchant, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:-
-
The object of this invention is to construct a weighing machine that by the
insertion of a coin, the weight of a person standing upon a scale forming part
of such machine can be indicated upon a dial, the weighing being effected by
the displacement of glycerine, water, or other fluid or semifluid in place of
the usual springs, levers or weights now employed.
My invention will be clearly understood by the following description aided by
the annexed drawings in which Figure 1 is a longitudinal side sectional elevation
of a coin freed weighing machine.
Figure 2 a front elevation partly in section.
A, is the casing having at its upper part a dial B and at its lower a projecting
portion C carrying a platform D, the projection portion C contains a cylinder E
and a piston therein contained is in connection or presses against the platform D
by its pin or projection G, the cylinder E has a tube H or a series of iubes which
extend up into the casing A.
The platform D) is in connection with a rod I which is arranged in the casing
and has at one part teeth J which gear with the pinion K on the index finger
spindle L. Pivotted to casing A is a lever M carrying at its lower part a
roller N and also being in connection by a link P with a bell crank lever Q which
bell crank lever is also the coin balanced lever on which the coin falls to over-
balance the lever Q and so remove the roller N from a stud or projection R
on the rod I to allow the machine to be operated.
A person stands upon the platform 1) and a coin is passed into the slot S, which
coin falls down the shoot T on to the cranked lever Q, and weighing down the
end on which the coin rests causes through the link P the lever M to shift and
the roller N to become clear of the stud or projection R on the rod I, the penny
at the same time discharging itself into the till V and before the coin operating
appliances have recovered themselves, the weight of the person or the goods on
the platform causes the platform D to descend and with it the rod I taking the
roller N clear of the stud R and the platform D) also operating on the piston F
causing the glycerine or other fluid in the cylinder E to be forced up the tube
or tubes H to a degree proportionate to the weight of the person on the platform D
and thus counterbalancing the weight of said person, the downward movement
of the rod I rotates pinion K by its teeth J and causes the index finger to move
round and indicate upon the dial the weight of the person on the platform D.
On the person getting off the platform, it will rise under the action of the
supporting springs U and in so doing push up the rod I which will return the
index finger to zero, at the same time the angled face or side of the stud R will

page_text: ride against the roller N and push it aside so that on the completion of the
movement of the rod I, the roller N can engage under the stud R and lock
the machine ready for a fresh coin to be inserted for a fresh operation, the coin
operating appliances being assisted somewhat in their return movement by a
spring W, at the same time the glycerine or other fluid or semifluid will lower
in the tube or tubes H and re-entering the cylinder E will push the piston F up
to the top end of the cylinder ready for the next weighing, or if desired the
piston may be attached to the platform I) and the return movement of the
platform D will cause the piston to assist the return of the liquid by suction.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1. In a coin freed weighing machine, the employment of a piston and cylinder
in connection with tube or tubes arranged in the casing whereby the weight
of the column of liquid or semi-liquid displaced from the cylinder will counter-
balance the weight of the person or goods upon the platform, substantially by
the means described.
2. In a coin freed weighing machine, a platform operating a piston in a
cylinder and a toothed edge rod operating the index finger, in combination with
a coin balanced lever and locking lever which engages a stop on the rod, all
arranged substantially as shown in the annexed drawings.
T
01
.. T
1000
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said J. T. Scott.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said J. T. Scott.