US1667113A - Anesthetizing apparatus - Google Patents

Description

Patented Apr. 24 1928 UNITED STATES;

PATENT osr cs.

JAY A. HEIDIBBINK, OI IINNEAI'OLI S, IINNEBO'IA.

ANESTHITIZING APPARATUS.

' Application filed nuns-{23,1924 Serial No. 694,465.

ject in particular is to provide means whereby a plurality of gases such as nitrous oxid and oxygen maybe readily delivered from independent sources ofvsupply in such man= ner that the flow of oxygen for mixing with the nitrous oxid willbe automatically controlled by the quantity of nitrous oxid being delivered so that the percentage of oxygen in the mixture .will be the same for dif-- 'ferent adjustments for the nitrous-oxid control. Another object is to provide means in combination with apparatus of this character whereby either nitrous oxid or oxygen alone my be administered when desired.

' .The full objects and-advantages of my invention will appear in connection with the detailed description, and the novel features of my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings. which illustrate one form in which my invention may be embodied,Fig. 1. is a top plan view of the apparatus. Fig. 2 isa view in vertical section on theline 2-2 of Fig. 1. Fig. 3 is a-view in vertical section on the line 33 of Fig. 1. Fig.4 is a view in vertical section on the line 4-4 of Fig 1. Fig. 5 is a view in horizontal section on the line 5-5 of Fig. 2." Fig. 6 is a view in vertical section on the line 6-6 of Fig. 5. t Fig. 7-is a view in vertical section on the line 77 of Fi 5. a

' is shown in the drawings, there is a pair of arms 14 and 16, the outer ends of which are provided with yokes' 18 and 20 within which heads of gascontainers 22 and 24 are adapted to be secured by set screws 26 and 28. The container 22 is intended for holding oxygen and the'container 24 is intended for holding nitrous oxid. The arms 14 and 16 contain longitudinal passagewa' s 30 and 32 as shown in Fig. 2, with whic the gas containers are adapted to be placed-in coIn-.

munication by means of needle valves 34 and 36 which constitute reducing valves. The arms 14 and. 16 extend out from a central member 38 which is provided with' a socket 40 for-receivingthe u per end of a standard 42. Controlling devices designated in'general by the numerals 44 and 46 are arranged for cooperation respectively with the passageways 30 and 32, the inner ends forations 48 and 50. The blocks 60 an are held resiliently upward by springs 68 T of which communicate with downwardly turned perforations 48 and 50 formed in blocks 52 and 54 rigidly secured in tubular members 56 and 58forming part of the con- 60 trolling devices 44 and 46 and constructed integrally with the central member 38. Slidable blocks 60 and 62 are positioned in the tubular members 56 and 58 and the upper ends of these blocks are provided with annu- Cl lar flanges 64 and 66 containing fiber plugs adapted to engage the outlet ends of the er and 7 0,. and these blocks may be depressed 70 by staplelike members 72 and 74 whichextend loosely through openings formed in the fixed blocks 52 and 54- as will be apparent from Figs. 6 and 7 The staple 74 at its 11 )per end isengaged by the lower surface 7 o a d1aphragm-76 forming the upper wall of a chamber 7 8. A coiled spring rests upon the=upper surface of the diaphragm 76 and the tension of this spring. ma be regulated by a screw 82. The chamber 8 is 80 provided with two outlet openings, one of which indicated at 83 and best shown in Fig. 3 is connected by a tube 84 with an inlet port 86 formed in a valve casing 88 attached to the central member 38,as shown in 00 Fig. 4 and containing a mixing chamber .90

having upper and lower walls 92 and '94 which contain openings controlled by a double ended valve'96 having an upwardlyex- -tending threaded stem 98 to which is secured lo a knurled head 100 by which the valve may be turned so as to entirely close, either the opening in the wall 92 or the opening in the wall 94. When one of these openings is closed the other one will be uncovered, while by placing the valve in intermediate position both of these openings will be uncovered. The port.86 for admission of nitrous oxid opens into a space above the upper wall 92. The other outet from the chamber 78 pre viously referred to and which is indicated at 101' in Fi 2 is connected by a tube "102 with a, cham 1'- 104 in the upper portion of the controlling device 44 for oxygen. The

.lower'wall of the chamber 104 is formed by 105 a diaphragm 106 which constitutes the upper wall of a chamber 108, this latter chamher being provided with a'relief valve 110 as shown in Fig. '2'. Referrin to Figs. 2 and 7, it will be seen that a dis 112 is enno gaged with the lower surface of the diaphragm 106. The disk 112 is mounted on one end of a link 114, the other end a which pivotally attached to a bracket 116. The

114 engages the free end of a lever 118 whose intermediate portion engages the top .of the staple 72. It is obvious that as the ressure of nitrous oxid in the chamber 7 8 is increased, the sliding block 60 will be depressed to a greater extent, thus allowing more oxygen to flow out of the lower end of the perforation 48 and up through the openings which contain the arms of the staple 72 so that the oxygen is delivered to the chamber 108 which has an outlet port connected by a tube 120 with a space 121 in the casing 88 below the lower wall 94. When the valve 96 is in intermediate osition, nitrous oxid will pass into the mixing chamber 90 from above and oxygen will pass into will be seenthat the oxygen chamber 108 is connected to a gauge 126 which registers the percentage of oxygen in the mixture when a mixture of oxygen and nitrous'oxid is bein administered while by reference to Fig. 6 It will be seen that the nitrous oxid chamber 78 is connected to a gauge 128 which registers the number of gallons of nitrous oxid being delivered per minute. A stop arm 130 is secured to the knurled head100. When this arm'engages the left hand side of a finger 132 secured to the valve casing 88,- the valve 96 closes the opening through the lower wall 94 and nitrous oxid only is allowed to pass into the chamber 90 for delivery to the inhaler. When the knurled head 100 is turned to bring the stop arm into engagement with the right'hand side of the finger 132, the valve 96 closesthe opening through the upper wall 92 and oxygen only is allowed to pass into the chamber .90 for delivery to the inhaler. -When the stop arm 130 is in intermediate position, theppenings be uncovered and a mixture. of the two gases will be delivered to the inhaler. As previously explained, the controlling device 44 for oxygen is automatically governed by the pressure bf the nitrous oxid which is regis-- tered-on the gau e 128 in number of gallons per minute and t e amount of which maybe 'readily varied by. means ofthe screw 82.

The percentage ofoxygen .in the mixture is therefore, the same for different adjustments of the controlling device for nitrous oxid. It is obvious that as soon as. the knurled head 1O0'isturned toward the right from thepositionshown in' Figs. 1 and -5,- a small amount of oxygenwill be admitted to the mixingchamber for mixing with the ply of nitrous oxid being entirelyshut oif when the arm 130 engages the right hand side of the finger 132. At an intermediate position of the head 10 the valve 96 will be opened equally at top and bottom. If desired, suitable graduations' may be placed on the head 100.. Proportioning' of the gases is controlled with the greatest facilitg' by irecturning the head 100 in the propertion. Furthermore, when the patient is being supplied with a mixture of the gases in the desired proportions, it is an easy matter to turn thehead 100 to its left hand limit so' as to give the patient a few whifis of pure nitrous oxid to obtain more complete anaesthetizing and then turn the head 100 toward the'right so as to re-establish administering the mixture in the desired proportion. L

I claim:

1. An anaesthetizing ap aratus having a mixing chamber, two in ependent sources of supply of gases under pressure connected with said mixing chamber,.a controllin de vice in one of sa d connections, a controlling device in the other of said connections, a diaphragm in saidfirst controlling device cona diaphragm in, said second controlling de-,

vicejconstituting a partition between two separated gas chambers, a passageway conmeeting said first mentioned gas chamber with .one of said separated gas chambers,

the other of said separated gas chambers bemg in the connection between its source of supply and the, mixing chamber, a. valve for controlling the supply. of gas to said last mentioned chamber and connections between said second "diaphragm and said valve for opemng the latter to an extent in proportion to the pressure of gas in the first of ,said separated chambers. through both the upper and lower wallswill of supply of gases under pressure connected with said mixing chamber, a controlling device in one of sad connections, said controlling device having a diaphragm which constitutes one of the walls of a gas chamber which is connected to said'mixing chamber.

and said controlling device having means associated with said diaphragm for varying the supply of gas to said chamber, a controlling device in the otherof said connections, said second controlling device having a diaphragm which constitutes a, partition between two separated gas chambers, a valve whlch controls the supply of gas to one of said separated chambers and connecting means between said second diaphragm and valve whereby the latter will beopened to an extent in proportion to the pressure of gas in the other of said separated chambers, a passageway connecting said last mentioned separated chamber with the chamber of said first controlling device, said mixing chamber having separate entrance ports for the gases which pass said controlling devices, and 10 means operable at will to completely close either of said ports and to progressivelyopen either of them as the other one is progressively closed.

In testimony whereof I hereunto aflix my

Images