Improvements in Keys, Levers, or Devices for Opening and Closing the Valves of High Pressure Gas Cylinders, or for other similar purposes.
Year: 1893

page_text: Date of Application, 26th Jan., 1893
Complete Specification Left, 13th Oct., 1893-Accepted, 18th Nov.; 1893
PROVISIONAL SPECIFICATION.
Improvements in Keys, Levers, or Devices for Opening and Closing
the Valves of High Pressure Gas Cylinders, or for other similar
purposes.
We KENNETH SUTHERLAND MURRAY of 30 Walpole Street, Chelsea in the
County of London, Engineer and BRINS OXYGEN COMPANY LIMITED of
34 Victoria Street in the City of Westminster do hereby declare the nature of
our invention to be as follows
This invention has for its object to provide keys levers or devices by means of
which the requisite power is obtainable for opening or liberating the valves of high
pressure gas cylinders or for opening or liberating other devices by which vessels
are closed whilst the same keys levers or devices when used for closing the valves
or equivalent devices will prevent undue force being applied and so risk of injury
to the seating of the valve or its equivalent is avoided.
According to this invention the key lever or device is made so that it constitutes
a long lever when used in the direction for opening the valve or the like and a
short lever when it is used for closing the valve or the like. For example the key
lever or device may be made in two parts one part being that which is applied to
the valve or the like and the other part being that which is grasped by the user.
These parts are hinged or connected together in such manner and are so relatively
arranged or provided with stops that when the valve or the like is to be closed
the parts so hinged or connected together are folded one upon the other or lie
side by side and afford the desired short leverage, for closing the valve or the like;
whilst when the valve or the like is to be opened or released the said parts so
hinged or connected together are in line or extend one beyond the other lengthwise
to afford the requisite long leverage for opening the valve or the like.
Dated the 26th day of January 1893
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Keys, Levers, or Devices for Opening and Closing
the Valves of High Pressure Gas Cylinders, or for other similar
purposes.
We KENNETH SUTHERLAND MURRAY of 30 Walpole Street, Chelsea, in the
County of London, Engineer and BRINS OXYGEN COMPANY LIMITED of
34 Victoria Street, in the City of Westminster 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 for its object to provide keys, levers or devices by means of
which the requisite power is obtainable for opening, or liberating the valves of high
pressure gas cylinders, or for opening, or liberating, other devices by which vessels
are closed whilst the same keys, levers, or devices, when used for closing the
valves, or equivalent devices, will prevent undue force being applied, and so risk
of injury to the seating of the valve, or its equivalent is avoided.
According to this invention the key, lever, or device, is made so that it constitutes
a long lever when used in the direction for opening the valve or the like, and a
short lever when it is used for closing the valve or the like.

page_text: The accompanying drawing shews a key, lever, or device, constructed in accordance
with this invention.
Figure 1 is a side view and
Figure 2 is an underside plan of the parts when in position for use as a long lever
and
Figures 3 and 4 are corresponding views with the parts in position for use as a
short lever.
The said key, lever, or device, is made in two parts, marked A and B, the part A
being that which is applied to the valve or the like and the part B being that which
is grasped by the user in opening the valve. These parts A and B are hinged, or
connected, together in such manner, and are so relatively arranged, or provided
with stops, that when the valve, or the like, is to be closed the parts so hinged, or
connected together, are folded one upon the other, or lie side by side, and afford the
desired short leverage for closing the valve, or the like, whilst when the valve, or
the like, is to be opened, or released, the said parts, so hinged, or connected
together, are in line, or extend one beyond the other lengthwise, to afford the
requisite long leverage for opening the valve, or the like. In the drawing this is
shewn as being effected by attaching the parts A and B together by the hinge
joint C a portion of the part A extending outwards at beyond the joint C to
constitute a stop for the part B when in the position shewn in Figures 1 and 2 for
opening the valve, or the like, the portion of the part A on the other side of the
joint C constituting a stop for the part B when in the position shewn in Figures 3
and 4 for closing the valve, or the like. As the hinge folds in the direction for
closing the valve, or the like, the full leverage of the long lever constituted when
the parts are in the position shewn in Figures 1 and 2 is only available for opening
the valve.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. A duplex or long and short lever, key, or device, for the purposes mentioned,
consisting of parts so connected, or attached together that it can be used as a long
lever only in the direction in which greatest power is to be exerted, as for instance
in opening a valve, substantially as bereinbefore explained.
2. A key lever, or device, constructed as herein before described, and as illustrated
by the accompanying drawings.
Dated this 12th day of Databon 100
J. H. JOHNSON & Co.,
Agents.