Improvements in Portable Weighing Machines.
Year: 1894

page_text: Date of Application, 4th Sept., 1894
Complete Specification Left. 1st June, 1895-Accepted, 27th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in Portable Weighing Machines.
I JAMES HOLT, of 95, West Street, and 6, Bent Hollow, Oldham, in the County
of Lancaster, Manufacturer of Weighing Machines and Scales, do hereby declare
the nature of this invention to be as follows:-
This invention relates to improvements in portable weighing machines such as
are chiefly used for weighing coal ou lorries, say one hundred-weight at a time.
The invention has for its object to render such machines stronger and thus more
durable and to prevent the knife-edges or centres and their respective sockets from
wearing when the machine is not in use and exposed to vibration and shocks, as in
the case when ou a lorry.
To this end I form the frame of the machine, steelyard and brackets of wrought
iron in lieu of cast iron and provide the machine with means for lifting and lowering
the various knife-edges and centres simultaneously out of their sockets.
The said means consist of a shaft suitably mounted in bearings at one end of the
machine and furnished with two levers or their equivalents which reach underneath
the platform and with a hand lever at one end.
When the said hand lever is moved inwards the said shaft turns and the aforesaid
two levers being thereby forced against the weight table, lift the sockets of the
These sockets lift the respective
latter off their respective knife-edges or centres.
end of the steelyard and thereby cause the knife-edges or centres in the middle
to be lifted off their sockets and that at its end to be lowered in the respective
socket.
The aforesaid handle is retained. in position by means of a suitable catch and the
said sockets are closed in lieu of being formed open.
Dated this 3rd day of September 1894.
F. BOSSHARDT & Co.,
Agents to Applicant..
I, JAMES HOLT, of 95, West Street, and 6, Bent Hollow, Oldham, in the County
of Lancaster, Manufacturer of Weighing Machines, 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 relates to improvements in portable weighing machines.
The invention has for its object to render such machines stronger and thus more
durable and to prevent the knife-edges or centres and their respective sockets from
wearing when the machine is not in use and exposed to vibration and shocks, as in
the case when on a lorry.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.

page_text: Figs. 1 & 2 are side views, Fig. 3 an end view of Fig. 1, and Fig. 4 a sectional
end view at line A-B of Fig. 2 showing my improvements applied to a machine
chiefly used for weighing coal on lorries, say one hundred-weight at a time.
In carrying out my invention and referring to the figures generally, by preference
I form each side a of the weighing machine with its socket al in one piece and
secure the same together at each end and near the bottom by means of cross
stays b&b respectively. All the said parts as well as the steelyard c I cast in
steel so as to ensure strength, lightness and durability.
In order to prevent the various knife edges or centres and their respective sockets
wearing when the machine is not in use I provide the machine with means for
lifting and lowering the said knife-edges or centres simultaneously out of their
sockets.
The said means consist of a shaft suitably mounted in bearings a' cast at one end
on the frame sides a and furnished with two levers 9 or their equivalents which
reach underneath the table or platform e¹ on which the goods to be weighed are
placed and with a hand lever at one end. In connection with the table or
platform sockets d I cast on each frame side a, a pocket a³ having a set screw i
against which the sockets d abut as hereinafter described, see more particularly
Fig. 4.
When the hand lever his moved inwards the shaft f turns in its bearings a³ and
forces the aforesaid two levers g against the table or platform e¹ thereby lifting
its sockets e off their respective knife edges or centres k on the steelyard c, as shown
in Figs. 2 & 4. The sockets e in the meantime abut against the round part of
knife edges or centres k, lift the respective end of the steelyard c and thereby cause
the knife edges or centres ¹ in the middle to be lifted off their sockets a¹ and the
knife edges or centres 2 at the other end of the steelyard c to be lowered from the
respective sockets d by the latter abutting against the set screws i. The hand
lever is retained in position when the said knife edges or centres are off their
sockets by means of a suitable catch / fitted in the form of a bracket to the side
of the frame a, the hand lever h being made to spring against it. The said sockets
are closed in lieu of being formed open.
It will be understood that the lifting device described may be applied at the
other end and with slight modifications to any other portable type of weighing
machine without departing from the nature of my invention.
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 I
claim, is-
1st. In portable weighing machines, a lever arrangement, or its equivalent,
adapted to raise one of the tables or platforms in such a manner that its sockets
lift off their steelyard knife edges or centres and the said sockets raise the
respective end of the steelyard and thus its other knife edges or centres off their
sockets, all substantially as and for the purpose set forth.
2nd. The general construction and combination of parts constituting my improve-
ments operating substantially as and for the purpose set forth.
Dated this 31st day of May 1895.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.