Improvements in Lever Weighing Machines.
Year: 1899

page_text: Date of Application, 25th Mar., 1899
Loft
4000 Acented 17th lan
1900
PROVISIONAL SPECIFICATION.
Improvements in Lever Weighing Machines.
I, HENRY POOLEY, Junior, Mona House, Congleton, in the County of Chester,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has reference to compound leyer weighing machines, and more
particularly to the type of such weighing machines which are used for weighing
vehicles, such as railway or other waggons, or other heavy vehicles, and in which
the levers or lever mechanisms are disposed generally below the level of the
ground or surface: and furthermore, it has special reference to machines of this
type in which the levers or mechanisms are disposed on either side of the movable
or weighing platform, inside cases or chambers, which are normally covered with
removable covers; the object of which is to enable access to be had readily".to
the weighing levers, and weighing mechanisms for the purpose of attending to
them, taking them out for repairs, and the like. For convenience, the improve-
ments hereunder will be described in connection with this latter type of machine
to which they are specially applicable.
On either side of the platform, and covered by the removable coverings on the
road surface, there are four main levers, two on each side, having their fulcra at
their outer ends. These levers support the weigh bridge or platform near its
ends by transverse beams or bars which they carry, or which are suspended from
them by links. The under side of the upper end or bridge of the links is pro-
vided with a knife edge which rests on a seat on the upper edge of the levers;
whilst the transverse platform bars or beams have horns at each end projecting
out beyond the platform, and which are supported by the lower ends of the link.
These links are specially constructed as hereafter described.
The inner ends of the pairs of main side levers at each side overlap; and in
weighing press downwards upon a vertical connecting bar or piece, which acts
on arms on a transverse oscillating bar or tube, which conveys the weight or
pressure of the thing being weighed to the weighing or scale mechanism arranged
at the side of the machine, or elsewhere.
The vertical bars or devices which transmit the weight or pressure from the
side main levers to the weighing or transmission lever, are each balanced by a
suitable bob or balance weight, and they rest on the weighing lever arms; and
consequently, if the weight of the main levers is temporarily taken off, as may,
and not infrequently does happen, the parts will not fall away or get out of place,
but will remain in the correct position, so that when the levers come down again,
they come onto the right point. The downward pressure of the levers may take
place through knife edges therein, resting on seats on the vertical bars or devices,
or through links or the like, suspended from the upper ends of the vertical bars
or devices, which may stand or project above the main levers in this case.
The action of the vertical bars or devices on the arms of the transverse weigh-
ing shaft, may be directly thereupon; or, according to another construction, it is
through open links, on the lower part of which lugs, on the outside of the vertical
bars, rest; while the inner sides of these upper parts are provided with seats
which rest on knife edges on the said arms. In this case, there are two links, one
on either side, and two weighing arms.
With regard to the weighing har or the weight transmission bar, this, in one

page_text: form, may be tubular, arranged transversely under the levers, and supported on
either end, outside the lever ends, by a knife edge on each end, resting on a
suitable seat, the point of which is in the same plane as the knite edges on the
frames carrying the vertical bars referred to. The motion from this transverse
oscillating tubular bar is conveyed to the weighing scale levers or mechanism by
a suitable arm, disposed and worked in a suitable chamber at the side of the
machine, or elsewhere.
With regard to the links bridging the main levers, and supporting the out-
wardly projecting ends of the cross beams of the platform at either end, these
links are so constructed that while they can be readily taken off the levers by a
direct upward movement, they cannot "spring," and a rigid support for the cross
beams is provided. This is effected by the employment of a detachable bridge
or connecting piece in the lower part of the links, by removing which,-when
it is desired to move the levers from their boxes or chambers-these links can be
simply lifted off over the levers, and then they-the levers are clear. A wedge,
dovetail, or other suitable connecting bridge or strut, or bolt, or the like-which
serves as a strut, and is readily detachable, may be used for this purpose.
Generally, while all the lever mechanism underneath the road level is readily
accessible, and can be got at and taken out with ease and rapidity, neither the
levers, nor any other of the parts are liable to get out of place by jar or rough
usage, such as hitherto they have been liable to; while at the same time the parts,
and construction generally, are simple, convenient and inexpensive, and also few.
It is to be understood that the several improvements comprised in the above
description may, or most of them may, be used in combination with advantage in
a weighing machine of the kind referred to; yet it is to be understood they may
be applied singly, or one or more of them in combination, in platform weighing
machines on the type referred to, where it can be done with advantage.
The with J & Mach 1000
Improvements in Lever Weighing Machines.
I, HENRY POOLEY, Junior, Mona House, Congleton, in the County of Chester,
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 has reference to compound lever weighing machines, and more
particularly to the type of such weighing machines which are used for weighing
vehicles, such as railway or other waggons, or other heavy vehicles, and in which
the levers or lever mechanisms are disposed generally below the level of the
ground or surface.
The invention will be described with reference to the accompanying drawings,
in which Figure 1 is a plan, and Figure 2 a longitudinal section of a weigh bridge
or platform machine provided with my improvements.
Figures 3 and 4 are side elevation and end view, illustrating in detail, the con-
struction of the connection between the main levers and the transverse weight
transmission oscillating bar or lever.
Figures 5 and 6 are side elevation and end view shewing in detail the con-
struction at the parts where the platform rests on and is carried by the side levers.
Figures 7 and 8 are end view and side elevation shewing a modified construc-
tion of the parts and arrangements illustrated in Figures 3 and 4.

page_text: Referring now to the drawings, and, more particularly, to Figures 1 to 6, a is
the platform, and a¹ girders supporting it. 6 are four main levers two on each
side having their fulcra, viz., knife edges, b', at their outer ends, resting on
seats on the frame, c, of the machine. These levers support the weigh bridge
or platform a near its ends through links d, and the underside of the upper ends
or bridge of the links d are provided with a seat, whilst the upper edges of the
levers are provided with a knife edge 62, and the links rest on these knife edges;
whilst the brackets e, fixed on the girders a¹ have horns e¹ extending downwards,
the lower ends of which are supported, namely, they rest on the lower ends of the
links, viz. on lugs or projections d' thereon.
The inner ends 63 of the main side levers 6 on each side overlap, as shewn in
plan in Figure 1, and, in weighing, press downwards upon a vertical connecting
piece or device h, which acts on arms fl on the transverse oscillating bar or
tube f, through links . This bar or tube f transmits the pressure and weight
of the thing being weighed to the weighing or scale mechanism, through an
arm g at the side of the machine.
The vertical connecting devices h, in the case shewn, are each in the form of a
bridge piece, and are each balanced by a bob or balance weight h¹, and the
downward pressure of the levers 6 is exerted through knife edges therein rest-
ing on seats on the upper ends of the vertical devices h, which rest on outside
lugs or projections ¹ on the links i, the upper bar or part of which rest on knife
edges on the ends of the arms f¹. By this construction, if the weight of the
main levers is temporarily taken off, as may, and not infrequently does happen,
the parts between the levers and the arms f will not fall away, or get out of
place, but will remain in the vertical position, so that when the levers 6 come
down again, they will come on to the right point, namely, the knife edges 6 will
come on to the seats h³.
With regard to the modification shewn in Figures 7 and 8, in this construction
the weight transmitted from the levers 6 to the transverse bar or tube f, through
its arms, is effected through separate connecting pieces or devices h, each
having a bob weight h¹ on its lower end to balance it, so that it keeps vertical if
the levers leave it; and the lower ends of these devices rest on the lower arms
or parts of an open link i, the upper ends of which are provided with knife
edges, which rest on seats in the ends of the arms f¹. The action in this case
is substantially the same in effect, as that of the arrangement set forth with refer-
ence to and shewn in Figures 3 and 4.
In some cases, in lieu of the levers having a pushing action, they may be
arranged in relation to the transverse weigh lever, and its arms, so as to have a
pulling action thereon.
With regard to the weight transmission bar f, this, in one form, as stated,
may be tubular, and arranged transversely under the levers b; it being supported
at either ends by knife edges f³ resting on suitable seats on the side members of
the frames c. In lieu, however, of it being in the particular form, this weight
transmission lever or apparatus may consist of a double arm lever, one arm
springing from one end as shewn, and the other from the opposite end, and joined
up in one where it is connected with the weighing mechanism or steelyard, or
equivalently constructed, but in these cases, also, it will be mounted in bearings
and supports, similarly as described, and operate in connection with the weigh
levers in a substantially similar manner.
Referring now to the links d, shewn in Figures 5 and 6, these links are so
constructed that while they can be readily taken off the levers 6 by direct upward
movement, they cannot "spring," and a rigid support for the weighing machine
beams and platform is provided. This is effected by the employment of a detach-
able bridge or connecting piece fitted into the lower part of the links, by
removing which-when it is desired to move the levers from their chamber-
these links can be simply lifted off over the levers b, and then they, the levers,

page_text: are clear. The connecting piece may be wedge shaped at the ends, fitted in
dovetail sockets in the lower end of the link-which the construction shewn may
be taken to represent; or other suitable form of connecting bridge, strut, bolt, or
the like, which serves as a strut, and is readily. detachable, may be used for this
purpose.
In some cases, in lieu of the levers and all parts being arranged directly under
the nlatform, the side main levers may be arranged in spaces at either side of the
platform, with removable separate covers over them; and the saddles or parts
which work in connection with these levers, may be mounted on cross frames or
girders projecting out on either side of the platform, and into the side chambers
or spaces.
Generally, while all the lever mechanism underneath the road level are readily
accessible, and can be got at and taken out with ease and rapidity, neither the
levers nor any other of the parts are liable to get out of place by jar or rouga
usage, such as hitherto they have been liable to; while at the same time the parts
and construction generally are simple, convenient, and inexpensive, and also few.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is;--
1. The herein described improvement in lever weighing machines of the kind
herein referred to, consisting of the combination of sets of main levers (66) on
either side of the machine, supporting the platform at their outer ends, and a
transverse oscillating weight transmission means connected with the ends of the
levers on either side, and supported on fulcra at either side; for the purposes set
forth.
2. In a lever weighing machine of the kind herein referred to, levers bb
arranged at either side, and supporting the platform at their outer ends, and a
transversely mounted oscillating weight transmission bar or lever f, the ends of
said levers 6 being connected to the transmission bar or lever by vertical con-
nections; substantially as herein set forth with reference to and shewn in the
drawings.
3. The herein described improvement in lever weighing machines of the kind
herein referred to, consisting of a device for connecting the main levers and the
weight transmission means, constructed and adapted automatically to maintain a
vertical position, or position normally required; for the purposes set forth.
4. In a lever weighing machine of the kind herein referred to, a lever bb at
either side, a transversely arranged and mounted oscillating weight transmission
means, and connecting devices for making the connection between the said levers
and the said transmission means, having a balance or bob weight upon it;
operating substantially as set forth.
5. In a weighing machine having characteristics as hereinbefore described and
claimed in Claim 1, the connections between the main levers, and the weight
transmission oscillating bar or lever, constructed as set forth with reference to
and shewn in Figures 3 and 4, and 7 and 8 of the drawings.
6. In a lever weighing machine of the kind herein referred to, a link mounted
on the weighing levers and carrying the platform, and having at its lower part
a a detachable strut or connection; substantially as and for the purposes set forth.
7. The lever weighing machine having parts arranged, combined, and adapted
to operate as set forth with reference to and shewn in the drawings.
Dated this 2nd dose of Doomhar 1800
5
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents, 15, Water Street, Liverpool.