US1731273A - Inhaling apparatus - Google Patents

Description

@@59929 H.MLC.SCHRDER L73L273 INHALING APPARATUS Filed June 11, 192e CIK tti

Patented Oct. 15, 1929 UNITED STATES PATENT OFFICE HANS WILHELM CHRISTIAN SCHRDER, OF LBECK, GERMANY, ASSIGNOR, BY MESNE l ASSIGNMENTS,

TO HEINRICH OTTO DRGER, OF LBECK, GERMANY INHALING APPARATUS Application filed June 11, 1926, Serial No. 115,175,`and in Germany June 13, 1925.

The present invention refers to improvements in apparatus for inhaling gases particularly for anesthetic purposes in which the stream of gas is started from timeto'time by hand and regulated .either also by handor automatically by the loperation of the lungs. Under certain circumstances such temporary starting ot the stream of gas independent of the regulation proper was'of late,

as is well known, left to the patient himself, because now-a-days anesthetic gases are known, which are mixed with oxygen, at such proportions that they can never be dangerous, and moreover because the novel narcotic apparatus are so constructed, that they allow of any degree of anesthesis between relaxation or full consciousness and unconsciousness. The semi-self-controlof the device vby the patient is especially desirable inl such'cases, 1n which no serious narcosis is required but merely a reduction of sensibility, for instancefwhen `pains arise' periodically, particularly birth-throes.y In such cases it must be taken into account that not all patients have the necessary clear reflection for self-operation or that frequently they lose their mind, when overwhelmedwith pains, so that they are no longer in positionto do the proper thing of gas. y

With the present invention the above stated circumstances are taken into account in 'ths way, coincidentally withstarting the stream of gas a controlling member is set to operate, which automatically cuts 0E the stream of gas after the passage of'a certain period of time, say one to two minutes. For a woman it is a very great relief if other than the manipulation for starting the stream .no more attention or operation on her part is required and when she may rest assured that the duration. of the narcosis is suited to the circumstances and regulated automatically.

In the drawing an apparatus is shown by for ycutting oit the stream 'ating the apparatus.

f The apparatus comprises a steel cylinder @for the narcotic gas having a pressure reducing valve b and a second steel cylinder c for the oxygen, also provided with a pressure reducing valve (l. Both pressure reducing 'valves in the position of the apparatus shown in Fig. 1 are open. The pipes e and `f conduct the gases to the casing g of the controlling Valve g. Vithin this casing the two gases are mixed whenthe piston tion 4shown in thedrawing, Fig. 1, and by the pipe h the mixture is allowed to enter the breathing bag i through the pipe h. The patient inha-les the gas from the bag i through the `pipe Ic, the pipe or hose Z and the mask fm., exhaling through the non-return valve fn. When the piston y is in the position in Fig. 2 the stream of gas coming from the pipe e an that coming from the plpe f are shut 0E, also the pipe k vis closed. The patient then breathes only non-return valve o, which in this position 1s free to operate, while it is shut off during the narcosis period by the controlling valve g 1n the position shown in Fig. 1.

When owing to a pain an anesthetic is required the piston valve y must be brought into its working position illustrated in Fig. 1, so that the mixture of gas is allowed to enter the mask. This is accomplished by lifting the piston p within the cylinder q, either by pulling atmospheric air through the the cord 1' or by allowing com-v pressed oxygen to enter the cylinder ([beneath the piston p through the pipe f. For the last named operation the valve s 1s provided, which by the aid of a pushthutton t can be of being eii'ected by the cord t may be accomplished by any other means,

opened to allow a sufficient amount of oxygen to quickly :Elow into the cylinder g. As long as the push-button t is not operated the valve s remains closed. By a pull on the cord r atmospheric air flows by way of the suction v valve uinto the cylinder q to allow the piston 'fw acts to move the piston valve y into its working position, Fig. l. Whenthe cord or the push-button is released the spring u will operate to return the piston" pback to the bottom of the cylinder, whereby at the same time the air or oxygen escapes slowly in one to two minutes by way of the fine opening w acting as a brake or throttling nozzle retarding the return of the piston. The piston p represents a movable element subjected to a force, such as gravity and the action of the spring fv, which imparts .to the element a movement with a predetermined speed. When the piston reaches a predetermined poc.utionin the course of its movement, shortly before it reaches' its position of rest and dead point at the bottom of the cylinder the arm 'w engages a shoulder y on the piston rod y', so that the controlling valve g will also be shiftedto its inoperative position as shown in Fig. 2. From this moment the patient only inhales atmospheric air.

The starting of the streamof gas, while operating the time-controlling means, instead r or push-button for instance a lever z, Fig. 3. The starting device may also be made to operate independently of the time-controlling device in such way that the patient may after pulling on the cord either let it go 0r hold it fast. In-

' stead of the time controlled device illustrated any 'other suitable time-controlling device may be provided which can be operated or released by the pull on the cord, for instance a fan acting like an air brake or any well known clock-work, which after a certain time automatically comes to rest. In this case initially the gas stream will be allowed to run and-at the e'nd cut off again.

It appears advisable to arrange the gas controlling valve,`by positioning the piston insuch manner, that at the end of the-narcos'is period the connection with the reservoir bag is interrupted, and only such with the atmospheric air is established. In this intanee the feeding of the gas to the bag may be continued for a few seconds. The object of this is to have a filled bag at disposal at the beginning of the next narcosis for the initial respiration.

The described releasing operation may also tuation of the latter to start the How of gases' will coincidentally operate said movable wall, the latter retarding the return movement of said controlling means to thereby automatically delay the cutting oiit'. of said flow for a predetermined period of time.

In an apparatus for administering anaesthetic inhalation gas, the combination comprising manu'ally adjustable valve means controlling the How of said gas, resilient means connected with said adjustable means and tending to re-set the same into the inoperative position in which the flow of said gas is stopped, and retarding means operatively connected with said resilient means so as to retard the re-setting movement for a prede-- termined period of time.

3. In an apparatus for administering anaesthetic inhalation gas, the combination vcomprising manually adjustable valve means conv trolling the flow of said gas to the organs of respiration, resilient means connected with said adjustable means and tending to re-set said regulating means into the inoperative position in which said iow is substantially stopped, and a pneumatic device operatively connected to the regulating means so as to retard its return into the inoperative for' a predetermined period of time.

4. In an apparatus for administering anesthetic inhalationv gases, the combination comprising valve means controlling the flow of said gases to the respiration organs, means for setting the valve into an operative position, a, movable element and means for imparting thereto a movement with predetermined speed, said element being connected with said valve means so as to be started by the setting operation of said valve means and to reactat a predetermined point of said movement on the valve means in order to reset the same into an inoperative position, thereby stopping said iow.

In an apparatus for; administering anesthetic inhalation gas, ythe combination com'- prising regulating valve means adapted t0 be manually set into an operative position in which a How of said gas is conducted to the position organs of respiration, and to be automatically re-set into an inactive position in which a Cil said organs, a movable element and means for imparting thereto a movement with predetermined speed, said element being so connected with said regulating valve means as to be started coincidentally with the manual setting' operation thereof'and to performthe automatic rez-setting when it reaches a predetermine position 1n the course of its movement. En testimony whereof I have signed my name to this specication.

HANS WILHELM CHRISTIAN SCHRODER.

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