Improvements in Weighing Machines.
Year: 1891

page_text: Date of Application, 5th Oct., 1891-Accepted, 12th Dec., 1891
COMPLETE SPECIFICATION.
Improvements in Weighing Machines.
I, JAMES PARKER of 10 Queen's Grove Road, Chingford, in the County of
Essex, Engineer, 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 :-
This invention for improvements in weighing machines relates to weighing
machines of that class in which the weight of the thing or person weighed is
indicated on a dial or gauge, and consists essentially in the employment of a flexible
bag or water bellows on which the weighing pan or platform bears, the said bag
being filled with water or other fluid and connected to a pressure gauge graduated
to indicate the intensity of pressure in the bellows, and consequently the weight
imposed on the weighing pan or platform, the apparatus heing automatically con-
trolled by coin released mechanism in such a manner that one coin out of any given
predetermined number of coins inserted is automatically conveyed into a separate
compartment or receptacle for charitable purposes, rent, royalty charges or
the like.
In the accompanying sheet of illustrative drawings,
Fig. 1 represents a vertical section of a weighing machine constructed according
to this invention.
Fig. 2 is a vertical section through the upper part of the machine and showing
the coin releasing and indicating mechanism and,
Fig. 3 is a front elevation of the same and showing the weight indicating dial.
A weighing platform a secured to legs b is supported on pins or knife-edges c, d
in the levers e, suspended from the casing y by links h and pins or knife edges i.
The end of the lever e is connected by a pillar to a piston or disc m working
loosely in a cylinder n and pressing upon a bag o of india-rubber or other flexible
material filled with water or other liquid and connected by the pipe p to the
On the spindle carrying the
pressure gauge q carrying on its spindle ŕ a crank J.
index pointer is mounted a small pulley w around which passes a cord attached to
a weight which causes a crank y on the end of the said spindlet (when released
by the insertion of a proper coin) to follow the motion of the crank on the spindle
of the pressure gauge 9 so that, as the latter rotates its position is indicated by the
pointer on the dial z. To the crank y is connected a rod a a working in the
guide a b and normally abutting against a plate a c connected to the lever ad and
held against the rod a a by the stop a e.
The thing or person to be weighed being placed on the platform a the proper
coin is inserted in the slot a fand passes down the shoot a g into an open ended
coin scoop a h on one end of the lever a d pivotted at a i and depresses it into the
position shown in dotted lines a hole al in the plate a c being then opposite the end
of the rod a a, when the crank y rotates under the influence of the weight to
follow the cranks of the pressure gauge and pushes the rod a a through the hole al
in the plate a c which thus maintains the lever ad in its depressed position, until
the weight is removed from the platform when the pressure gauge crank returns
to its normal position carrying the crank y with it, withdrawing the rod a a from
the hole al in the plate a c, and permitting the lever a d to be returned to its
normal position by the counterweight am working in a dash pot a n which prevents

page_text: its too rapid motion and so permits the rod a a to pass freely through the hole a
in the plate a c.
A guard a o prevents the coin from leaving the scoop a h until the
lever a d is fully depressed, when it falls either into a till a p, or is conveyed
through a shoot a g to the receptacle a r on the outside of the apparatus. As the
lever a d descends a pawl as engages with a pin wheel at and rotates it through
one step. The pin wheel a t is provided with six pins (though any number may be
employed) one being considerably longer than the other five, and a lever a v
fulcrumed at a t is so situated relatively to the said pins that it is clear of the
shorter pins but engages with the longer one by which it is raised once during a
revolution of the pin wheel, causing the switch plate a r to be so turned that the
coin on falling on it from the scoop a h is guided into the shoot a q and thence to
the receptacle ar on the outside of the apparatus as clearly shown.
On the next descent of the lever a d the long pin is removed from under the
lever a which then falls and returns the switch plate a z to its normal position to
guide the falling coins into the till a p.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I am aware of Everitts
Patent No. 16433 of 1884 and make no claim to anything therein described and
claimed, but I declare that what I claim is :-
1. In a weighing machine controlled by coin freed mechanism, the occasional
diversion of the operating or releasing coin to a separate compartment or to the
outside of the machine substantially as described.
2. In a weighing machine controlled by coin freed mechanism the employment of
a flexible bag containing liquid connected to the weighing platform and by a tube
to a pressure gauge arranged and constructed substantially as described.
3. In a weighing machine controlled by coin freed mechanism in which the
operating or releasing coin is occasionally conveyed to a separate compartment or
returned to the outside of the machine, the employment of a switch for guiding the
falling coin arranged, constructed and operating substantially as described.
4. In a weighing machine controlled by coin freed mechanism the combination of
the releasing mechanism operated by a coin and the devices for the occasional
diversion of the operating or releasing coin, the whole arranged, constructed and
operating substantially as described for the purpose specified.
5. The arrangement and construction of weighing machines controlled by coin
freed mechanism substantially as described with reference to the drawings.
Dated this 5th day of October 1891.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.