Improved Apparatus for the Automatic Administration of Nitrous Oxide Gas or other Gases.
Year: 1887

page_text: Date of Application, 4th Jan., 1887
Complete Left, 30th Sept., 1887
Complete Accepted, 8th Nov., 1887
Improved Apparatus for the Automatic Administration of Nitrous
Oxide Gas or other Gases.
We, ALBERT KING of No. 33 Shaw Street in the City of Liverpool Ironmonger
and HENRY ALFRED PAIN of the same address Dentist do hereby declare the nature
of this invention to be as follows:-
To each and at the upper ends of the two ordinary nitrous oxide gas container
cylinders, employed for dentistry or surgical operations, we attach by means of a
ferrule or loose nut, a bent fork shaped, tube connected to a central hollow standard
or pillar which is firmly attached to the foot or base block carrying gas container
cylinders. The said hollow pillar is provided with a valve for regulating opening or
closing the flow of gas from container cylinders.
This valve we actuate in the following manner at the end of valve spindle we fix
a cranked lever, the end of which is loosely jointed to a vertical connecting-rod, in
its turn loosely jointed to a foot or treadle lever pivoted to and near base of hollow
pillar.
At the end of treadle lever next to valve connecting rod, we provide a spiral spring-
fixed, and in tension, to the treadle lever at one end, and to the base of apparatus at
the other end. The spring being in tension pulls down the treadle lever and closes
the valve.
The treadle lever is provided with the ordinary foot or treadle plate at one end.
When the operator requires a supply of gas he has simply to press down the treadle
lever with his foot, this action extends the spiral spring and opens the valve, if he

page_text: wishes to arrest the gas supply he has simply to remove his foot and the spring pulls
the other end of treadle lever down and closes the valve instantly and automatically.
Just below the valve in hollow pillar, we place a tubular projection for attachment
to ordinary gas tubing.
The use of our Invention permits an operator to administer gas without the necessity
of using his hands in regulating the supply of the gas. This gives him greater
freedom, he has besides the supply of the gas under greater control, consequently our
apparatus possesses the elements of greater utility and safety than those hitherto in use.
Dated this 3rd day of January 1887.

page_text: Oxide Gas or other Gases.
We, ALBERT KING of 33 Shaw Street in the City of Liverpool Ironmonger and
HENRY ALFRED PAIN of the same address Dentist do hereby declare the nature of this
invention and in what manner the same is to be performed, to he particularly described
and ascertained in and by the following statement:-
Our Invention relates to an improved apparatus for the administration of nitrous
oxide, and other gases for dental or other surgical purposes.
Referring to (sheet of) drawings that are intended to form part of this specification,
Figure 1, shews a plan, Figure 2 a front elevation, and Figure 3 a side elevation
shewing our Invention."
Before proceeding to describe same in detail, we wish it to be clearly understood
that we do not wish to be confined to the exact details herein shewn, as they may be
considerably modified without departing from the nature of our said Invention.
Referring to figures 1. 2 and 3
A A are the two nitrous oxide gas containers of ordinary construction mounted on
a stand B, and provided with a portable handle C.
The central hollow standard D is connected to both gas containers by the hollow
fork connections E.
The central hollow standard D is provided with a valve or cock G and just below
it a gas escape connection H to which we attach the ordinary flexible gas connecting
tubes.
The valve G is actuated by a foot treadle lever F connected to valve lever I by
means of the connecting rod J.
The valve is always kept closed by the coil or other form of spring K being
permanently in tension, the pressure of the spring is partly counterbalanced by the
chain L.
The operator, when employing an apparatus for the administration of nitrous oxide
gas constructed according to our invention, has simply with his foot to press down
the treadle F, and by simply removing the pressure of his foot the gas supply is
stopped.
It will be seen that the apparatus is thus entirely under control, and with the
least possible effort and without the necessity of removing ones hands from the subject
under operation. This full freedom of the hands is, we claim, a most important
advantage.
An apparatus for the administration of nitrous oxide gas, constructed according to
our invention possesses the elements of greater utility and safety than those hitherto
in use.

page_text: Having now particularly ascertained and described the nature of our Invention
and in what manner the same may be performed, we claim
1st. The apparatus substantially as herein shewn and described in its complete form
for the administration of nitrous oxide or other gases required for surgical purposes
of a dental or other nature.
2nd. The use of a foot lever treadle for actuating valve with spring arrangement
for reclosing same substantially as herein shewn and described.
ALBERT KING.
HENRY ALFRED PAIN.