Improvements in Respiration Inspirators.
Year: 1894

page_text: Date of Application, 13th Feb., 1894-Accepted, 21st Apr., 1894
COMPLETE SPECIFICATION.
Improvements in Respiration Inspirators.
I, WILLIAM FRANCIS ZENT DESANT of 120 Broadway New York, in the
City, County and State of New York, United States of America, Inventor, 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:-
My invention consists of a simple apparatus for forcing fresh air or any desired
mixture of oxygen, ozone or other gases into the lungs of a patient, and withdrawing
the contents of said lungs, alternately, so as to produce artificial respiration.
In the accompanying sheet of drawing
Fig. 1, is a side view and partial section of my preferred form of apparatus.
Fig. 2, is a detailed view showing the method of operating the apparatus by an
electric or other motor.
Fig. 3, shows a modification.
Throughout the drawings like reference figures and letters refer to like parts.
1, is the main frame of the double pump which is one form of my invention. This
pump has two cylinders 2, and 3, mounted on the base 4. These cylinders have
pistons, 5, operated by the connecting rods 6, and crank discs 7, on the shaft 8, in
the usual manner. The shaft 8, is journaled in bearings on the frame 1, and the
crank pins may be continued in the form of handles 9, as shown in Fig. 1, so that
the pumps may be operated by hand. A gear wheel 10, on said shaft may be made
to mesh with the gear 11, on the shaft 12, of an electric motor 13, or with any
suitable motor, if the pump is to be run by power.
14, is a portion of a tank containing the oxygen or other gases which are to be
forced into the patient's lungs. The tube 15, having an inward opening valve 16,
effects communication between the tank 14, and cylinder 3. The tube 17, having a
downwardly opening valve 18, effects communication between the cylinder 3, and the
chamber 19. The flexible tube 20, of any desired length, terminating in the mouth
piece 21, effects communication between the chamber 19, and the mouth and conse-
quently the lungs of the patient. The tube 22, having an upwardly opening valve 23,
effects communication between the chamber 19, and the pump cylinder 2. 24, is a
discharge tube from said cylinder 2, having an outwardly opening valve 25.
The operation of my invention is clear from the above description. The tank 14,
being filled with the desired gas and the mouth piece 21, being placed in the mouth
of the patient and the shaft 8, being operated either by the handles 9, or the
gear 10, the following action of the various parts will take place; on the down-
ward thrust of the pistons 5, the contents of the pump cylinder 3, will be forced
through the valve 18, and the chamber 19, and tube 20, into the patient's lungs.
The contents of the pump cylinder 2, will be forced out into the open air through
the opening valve 25. On the upward stroke of the pistons 5, the valve 18, will
close and the valve 16, will open filling the pump cylinder 3, with a portion of the
contents of the tank 14. At the same time the valve 23, will open and the contents
of the patient's lungs will be drawn into the pump cylinder 2. On the succeeding
downward stroke of the piston the portion of the oxygen or other gases entrapped in
the pump cylinder 3, will be forced into the patient's lungs by the closing of the
valves 16, and 23, and the opening of the valve 18. At the same time the discharge
from the lungs which had been drawn into the pump cylinder 2, will be forced
through the opening valve 25, into the open air. Thus the action of the pump
will be continuous, alternately filling the patient's lungs with the life giving gases
and then emptying the lungs into the open air.

page_text: The modification of my invention illustrated in Fig. 3, is intended to produce a
more compact and lighter form of apparatus, but which operates on identically the
same principles as the first form above described.
In the construction illustrated 33, is a light frame on which the bellows 32,
and the bellows 31, are mounted. Each bellows takes the place and performs the
function of one of the cylinders 2, or 3, in Fig. 1, and is an exact equivalent thereof,
so that throughout this Specification and the claims I desire to have it understood
that the term cylinder includes the term bellows. The bellows are operated by the
links 29, and 30, which are pivoted to the walking beam 26. This walking beam
is pivoted at 34, and is reciprocated by the pin 28, on the crank disc 35, which pin
moves in the slot 27, formed in an extension of the walking beam.
The inlet to 15, and the outlet to 24, with their valves 16, and 25, operate in
exactly the same manner as do the same parts in Fig. 1. The tube 19 takes the
place of the chamber 19, in Fig. 1, and its connecting pipes 17, and 22, have their
equivalents in the said tube 19. The valves 18, and 23, operate the same in Fig. 3,
as in Fig. 1. An adjustable stroke may be given to the bellows by shifting the
position of the rods 29, and 30, along the slots shown in the end of the walking
beam, 26.
Of course various changes could be made in the details of my apparatus without
departing from the spirit of my invention. In cases where fresh atmospheric air is
to be used instead of prepared gas it would only be necessary to have the tube 15,
or tank 14, open to the air instead of to the receiver of prepared gases.
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 :-
(1.) The combination of a double cylinder force pump, an inlet valve for one
cylinder, an outlet valve for the other cylinder, a connection between said cylinders,
two valves in said connection which open away from the cylinder having the inlet
valve, and a mouth piece opening into said connection between said two last
mentioned valves, substantially as described.
(2.) The combination of a double cylinder force pump, an inlet valve for one
cylinder, an outlet valve for the other cylinder, a connection between said cylinders,
two valves in said connection which open away from the cylinder having the inlet
valve, and a mouth piece opening into said connection between said two last
mentioned valves, together with a tank for prepared gases connected to the first
mentioned inlet valve, substantially as described.
Dated this 13th day of February 1894
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.