Medical Improvements in Apparatus for Anæsthetical Purposes.
Year: 1890

page_text: Date of Application, 22nd May, 1890
Complete Specification Left, 23rd Feb., 1891-Accepted, 18th Apr., 1891
PROVISIONAL
SPECIFICATION.
Medical
Improvements in Apparatus for Anæsthetical Purposes.
PERCY EDGELOW, of 7, Old Burlington Street, London, W.,
Practitioner, do hereby declare the nature of this invention to be as follows:
This invention relates to apparatus for facilitating the management of gases
employed for anæsthetical purposes.
In A. T. Clarksons Patent 13645-1884, is described an attachment to the
cylinders or vessels (containing the stored gases), for the purpose of regulating the
This invention is an
supply obtainable, by means of the administrators foot.
extension and improvement upon that arrangement, its object being to provide the
administrator with a duplicate source of supply which he can instantly draw upon
when needed, and also when two gases are employed as a mixture to easily regulate
the desired proportions.
I am aware that this has been attenipted before but the mode of embodying this
principle is both new and more convenient to use.
A. vertical stem piece having a cross piece fixed to its lower end forms the base
or support. The upper part is made hollow and at right angles has three pro-
jections also at right angles to each other. The two projections in line are
provided with unions for connecting to the outlets of two of the foot valves
previously mentioned, the latter in this instance being arranged with side outlets,
and inlets vertically underneath.
For the purpose of putting the stem piece into communication with the cylinders,
the latter are placed parallel upon the floor with their outlets in an upward
direction.
In this position they can easily be connected to the valve inlets, as any
irregularity in their shape will at once adjust itself by rotation occuring in the
unions between the valves and stem-piece.
A supply can now be obtained from the third projection from either one or both
of the cylinders by simple foot manipulation of their respective valves, which are
conveniently situated near to the floor and close together.
Dated this 22nd of May 1890.
PERCY EDGELOW.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Anæsthetical Purposes.
PERCY EDGELOW, of 7, Old Burlington Street, W., Medical Practitioner,
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 apparatus for facilitating the management of gases
employed for anaesthetical purposes.
In A. T. Clarksons Patent 13645 1884, is described an attachment to the
cylinders (containing the stored gases) for the purpose of regulating the supply
obtainable, by means of the administrator's foot. This invention is an extension
and improvement upon that arrangement, its object being to provide the
administrator with a duplicate source of supply, which he can instantly draw upon
when needed, and also when two gases are employed as a mixture to easily regulate

page_text: the desired proportions. I am aware that this has been attempted before but the
mode of embodying this principle is both new and more convenient to use.
Referring to the accompanying drawing half of which is in section,-A is the
vertical stem piece, B the cross piece fixed to the lower end by screw and nut
forming the base or support.
The upper part of A has three projecting pieces at right angles to each
other, a, a & a²; these are drilled through their centres forming a T shaped
passage. a, is the outlet, a' & all are inlets, and are provided with caps or union
pieces U & U¹in order to attach them to the outlets respectively of two of Clarksons
foot actuated valves C & C. The inlets to C & C'are directly underneath and are
provided with caps or union pieces U* & U³ for the purpose of attachment to the
outlets of the cylinders containing the stored gases. For the purpose of putting A
into communication with the cylinders the latter are laid parallel upon the floor, with
their outlets in an upward direction when they can easily be connected by means
of U & U³ to the respective inlets of C & C', as any irregularity in their shape
will at once adjust itself by rotation in the unions U & U. The valves attached
to the cylinders being now opened, a supply can be obtained at a, from either one
or both of the cylinders by simple manipulation of their respective valves, which
are conveniently situated near the floor and close together.
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 :-
The stem piece A and support B with the unions U & U, in combination with
the two valves C & C¹ substantially as herein set forth.
Dated this 21st day of February 1891.
PERCY EDGELOW.