An Improved Suspension Weighing Machine.
Year: 1892

page_text: Date of Application, 11th Feb., 1892
Complete Specification Left, 11th Nov. 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION.
An Improved Suspension Weighing Machine.
I, JAMES EAGLES, of 58, Buckley Wells, Bury, in the County of Lancashire,
Mechanical Draughtsman do hereby declare the nature of this invention to be as
follows:-
This invention consists essentially of the following:-
(1) A rigid metal support suitably arranged for hanging on a crane hook or
similar appliance & having certain seats prepared on it for the support (when
necessary) of a buffer plate (to be described hereafter).
(2) A flexible box constructed of metal, with its top, or bottom, or sides, or any
of them, or all of them, as may be found preferable, corrugated, & which is filled
by a liquid, its interior communicating by means of a proper passage with. a
pressure gauge & by means of another passage, (which is partly screwed) with the
exterior; this latter passage is more or less filled with a screw which thus closes
the box & which may be used for regulation purposes.
This flexible box rests on the rigid support already described &
may be.
constructed entirely separate from the support or the support may form part of
the flexible box.
(3) A buffer plate [which has been previously mentioned (1)] & to which is
fastened a hook, or its equivalent, from which the articles to be weighed are to be
Buspended.
This buffer plate is provided with projecting lips, which, when the load is too
excessive for the machine, come in contact with & rest on, the prepared seats on
the rigid support (1).
(4) A cushion, constructed of layers of india-rubber or other similarly com-
pressible substance, alternating with layers of metal; the layers of metal
preserving the cushion from unequal & excessive transverse distortion.
This cushion is placed underneath the buffer plate & rests on the top of the
flexible box. It thus protects the flexible box from sudden & excessive shocks,
& by yielding proportionally to the load, allows the buffer plate to come down on
to the seats prepared for it as previously described, when the load is too
excessive.
The machine is self-contained, all the various parts being arranged for this
purpose.
The action of the machine is as follows:-When any article is to be weighed,
the machine is hooked on to any convenient support & the article suspended from
it as described before. The weight of the article is transmitted by the buffer plate
& cushion to the top of the flexible, which, being constructed so as to yield readily
to such a pressure, transmits the weight or pressure to the liquid inside, when the
pressure gauge, being suitably graduated, at once indicates the weight. It should
be distinctly understood that the pressure gauge forms part of the machine.
Dated this Tenth day of February 1892..

page_text: COMPLETE SPECIFICATION.
An Improved Suspension Weighing Machine.
I, JAMES EAGLES, of 58 Buckley Wells, Bury, in the County of Lancaster,
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 :-
"
or other
This invention consists essentially of a rigid metal support frame or case
carrying a flexible box or chamber which box or chamber is filled with liquid
and the said liquid communicates with a pressure gauge of "Bourdon
well known construction. A buffer or compressing plate to which a hook is
fastened to suspend the body to be weighed bears upon the flexible box or chamber
and presses upon it with a pressure depending upon its weight. The pressure
gauge then indicates the weight corresponding to the pressure within the flexible
chamber.
Referring to the accompanying sheet of drawings-
Figure 1 is a section of my suspension weighing machine while Figure 2 is a
front external elevation looking upon the registering pressure gange.
The invention is carried into effect and acts as follows-The support frame or
case A is suspended from any convenient hook or pin such as that of a crane chain
by means of the bridge suspension piece B and the load to be weighed is suspended
from the hook I or any equivalent contrivance. The stem I of the hook I is
attached to a pressing plate or buffer plate G, which plate has two extensions or.
projecting fingers G₁, G³ acting in slots in the case A and stopped in these slots at the
maximum safe movement of the plate G. The rubber plates H alternating with
iron plates form an elastic cushion between the buffer plate G and the top or
cover plate of the liquid containing chamber C. As shown in the drawing the
chamber C is constructed of an outer corrugated tube D and an inner corrugated
tube E, these tubes are of suitably thin and flexible metal and they are firmly
screwed or otherwise secured at both ends, the lower ends being fastened into the
case A. and the upper ends into the cover F. The ends and recesses are so faced
and screwed or secured as to produce an absolutely pressure tight joint.
The chamber C is filled with a suitable liquid by way of the passage M containing
and closed by a screwed pin M' and the liquid passes to the pressure gauge K by
the passage L. The gauge K is graduated preferably by hanging known weights
on the hook I and so the elasticity of the corrugated tubes D, E is easily.
allowed for.
The screw M' is operated to adjust the initial pressure of the liquid within the
chamber C as may be required. The buffer plate & being provided with projecting
lips the said lips come in contact with and rest on the prepared seats in the frame
or case A and so prevent damage to the chamber C should the weight or oscillation
be excessive. The cushion H constructed of layers of rubber or other convenient
compressible substance, alternating with layers of metal as is common in rubber
buffer construction, protects the flexible chamber from sudden and excessive shocks
and by yielding proportionately to the load allows the buffer plate to come down
to the seats prepared for its projections as previously described when the load is
excessive.
The machine is self contained, all the various parts being arranged for this
purpose.
Described in general terms the action and use is as follows-When any article
is to be weighed the machine is hooked to any convenient support and the article
suspended from it as hereinbefore described. The weight of the article is
transmitted by the buffer plate and cushion to the top of the flexible box, which
being constructed so as to yield readily to such pressure transmits the weight or

page_text: pressure to the liquid inside and the pressure gauge being suitably graduated at
once indicates the weight.
It is to be distinctly understood that the pressure gauge may be of any
convenient known construction and that although only one construction of flexible
chamber is described and illustrated, the construction of this chamber may be
varied without departing from the invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A suspension weighing machine in which the load to be weighed brings
pressure to bear upon part of a flexible chamber containing liquid and the
pressure is registered by a suitable pressure gauge in order to determine the
weight.
2. A suspension weighing machine as claimed in the preceding claim comprising
a flexible chamber, a rigid frame or case, a buffer plate having stops and with
hook and a rubber or like cushion substantially as and for the purposes hereinbefore
described reference being had to the accompanying drawings.
3. The suspension weighing machine hereinbefore described as illustrated in the
accompanying drawings.
Dated this 10th day of November 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.