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Publication numberUS440713 A
Publication typeGrant
Publication dateNov 18, 1890
Filing dateSep 8, 1890
Publication numberUS 440713 A, US 440713A, US-A-440713, US440713 A, US440713A
InventorsCharles William Krohne
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Charles william krohne and henry frederick sesemann
US 440713 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)



Patented Nov. 18, 1890.




SPECIFICATION forming part of Letters Patent No. 440,713, dated November 18, 1890.Y

' I `Application filed September 8, 1890. Serial No. 364,368. (No model.)

.To a/ZZ whom t may concern:

Be itknown that we, CHARLES IVILLIAM KROHNE and HENRY FREDERICK SEsEnANN, su rgical-instrument manufacturers, of 8 Duke Street, Manchester Square, London, subjects of the Queen of Great Britain and Ireland, have invented Improvements in Inhalers for the Administration of Chloroform and other Anaesthetics, of which the following is a specification.

Our invention relates to improvements in inhalers for the administration of chloroform and other anzesthetics and it consists, chiey, of a device or respiration-indicator applicable to all kinds of inhalers, and capable of indicating the nature, frequency, and character of the respirations of persons or animals subjected to the influence of anzesthetics, so that, owing to the respiration being thus under constant observation, all danger of syncope, coma, or other failure of the hearts action, due to a prolonged influence of the drug administered, is removed, as immediately any abnormal sign is indicated by certain premonitory symptons affecting the respiration, or by a slowing or entire stoppage of the latter, the apparatus can be forthwith withdrawn from the persons or animals mouth and artificial respiration orother recuperative means resorted to in time to avoid accident. It is a wellknown fact that physicians have for years endeavored to minimize by every conceivable appliance or process the danger arising from the use of anaesthetics and of chloroform in particular; but their efforts have hitherto proved fruitless, owing to their not having been able to keep the respiration of the patient under constant observation, so as to apply remedial measures in time-that is to say, before death supervenes; and in order that our invention may be more fully understood we have shown the same in the accompanying sheet of illustrative drawings, in which- Figure l. is a side view of an inhaler provided with our improved device, showingthe mouth-piece in section. Fig. 2 is a plan of the same. Fig. 3 is a sectional elevation of our device applied to a special form of in haler. Figli is a plan of the latter. Fig. 5 is aview of the upper part of the device. Fig. G is a section of the cap or cover which is used to protect the device from injury.

Our improved device consists of a truncated cone C, the upper and conical part c of which is provided at its base with two symmetrical slots, one of which (the slot s) is only shown in the drawings. This conical part c terminates in the cylindrical part P, the upper end of which forms a rim o', projecting above the former. This cylindrical part F,which is inserted within the opening of the mouth-piece or bag M, carries a pipe p, passing through the latter, and through which the anzesthetic is inhaled, this pipe being fixed in the application shown in Fig. l to one of the side ribs ct a of the said mouthpiece, which is perforatedv `at the top to allow for the entrance of the anaesthetic into the mouth-piece or bag M. These ribs are secured to the frame f of the mouth-piece, as clearly shown in Fig.1. Fig. 3 shows the cylindrical part I)l fixed directly to the neck of an improved inhaler of peculiar shape, which we prefer to the ordinary form, as shown in Fig. 1.

Our improved device consists, further, of a ring R, fitting over the conical part c and resting upon the rim 1^. Two screws u n', projecting through the slots s s', enable the ring to be turned to and fro for the purpose of adjustment, as hereinafter more fully referred to. This ring is furnished with a slot t, in which moves a small holder h, carrying a feather F, and swiveled to the small tubes t t', partly countersunk in the said ring. yThe cap shown in Fig.` 6 serves to cover the device when not required for use. Instead of a feather, we may likewise use any other light substance, material, or fabric. The inhaling apparatusbeing placed over the patients mouth and chloroform vapor, for instance, being admitted through the pipe p, the respiration and expirations of the said patient will cause the feather F to move to and fro and in a manner and speed corresponding to the way in which the respiration is carried on. As this feather which rests on the apex of the tapered part c is very sensitive, accurate indications will be constantly obtainable as to the nature, frequency, and character of such respiration. Should the head of the patient fall to 'one side, the ring R can be turned in the other direc- IOC) tion, so that the feather may always remain Straight in front of the operator administering the anaasthetio. The opening of the tapered part callows of the admixture of a sufficient amount of air with the chloroform.

Our improved device can be likewise applied to a suitable bag for the purpose of administering anaesthetics to animals-such as horses, cattle, sheep, zc-and will be found particularly useful to avoid pain in castrating and other operations. Our improved respiration-indicator may be made of any suitable material, such as metal, horn, ivory, Celluloid, vulcanite, andthe like.

What We claim, and desire to secure loy Letters Patent of the United States, is-

In respiration-indicators used in connection with the administration of anaesthetics, the combination of a truncated cone C, with a ring R and a swiveled feather F, substantially as hereinbefore described in this specification, and illustrated by the accompanying drawings.

In Witness whereof We have hereunto seb our hands in presence of two Witnesses.

Signed at London this 26th day of- July, 1890.


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US5231983 *Oct 7, 1991Aug 3, 1993Minnesota Mining And ManufacturingMethod of and apparatus for the aerosol administration of medication
US5322059 *Dec 29, 1992Jun 21, 1994Dragerwerk AgBreathing mask with flow indicator for the respiration air
US5645049 *Jul 5, 1994Jul 8, 1997Trudell Medical LimitedExhalation valve for face mask with spacer chamber connection
US5988160 *Apr 25, 1997Nov 23, 1999Trudell Medical LimitedExhalation valve for face mask with spacer chamber connection
US6386196 *Sep 18, 2000May 14, 2002Steven E. CultonWarning device for oxygen delivery system failure
US7004162Sep 30, 1999Feb 28, 2006Canadian Monaghan, Ltd.Exhalation valve
US7013896May 6, 2002Mar 21, 2006Trudell Medical InternationalMask with inhalation valve
US7084355Apr 8, 2003Aug 1, 2006International Business Machines CorporationMultilayer printed circuit board
US20030214797 *Apr 8, 2003Nov 20, 2003International Business Machines CorporationMultilayer printed circuit board
US20040014917 *Sep 27, 2001Jan 22, 2004Thomas EberleCatalyst support, production and use thereof in the polymerization of olefins
US20070095349 *Oct 5, 2004May 3, 2007Dragerwerk AgRespiratory mask
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Cooperative ClassificationA61M16/06