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June '21, 1938..’ , M. HAUSMANN 2,121,034 APPARATUS FOR GENERATING OXYGEN, ESPECIALLY FOR BREATHING PURPOSES Filed Oct.‘ 8, 1956 2 sheds-Shea; 1 11219.2 Max Hauumann In van for By His‘ Afforneys ' June 21, 1938. ‘M. HAUSMANN 2,121,034 APPARATujs FOR GENERATING OXYGEN, ESPECIALLY FOR BREATHING PURPOSES ' ‘ ' Filed Oct. s, 1956 2 sheets-sheet 2 Maw Hausmann' In ven for By His Afforneys ' 2,121,034 Patented June 21, 1938 PATENT‘ OFFICE ‘ UNITED: STATES 2,121,034 APPARATUS FOR- GENERAT‘ING OXYGEN, ESPECIALLY FOR BREATHING PURPOSES Max Hausmann, Berlin-Zehlendorf-Mitte, Ger many, assignor to I. G. Farbenindustrie Ak tiengesellschaft, Frankfort-on-the-Main, Ger many Application October 8, .1936, Serial No. 104,585 In Germany November 27, 1935 4 Claims. (Cl. 23-281) This invention relates to apparatus for gener ating oxygen, especially for breathing purposes. Extended use is made for‘arti?cial respiration in cases of gas poisoning of so-called oxygen res 5. cue apparatus,in which the oxygen is adminis tered from pressure ?asks which are ?tted with reducing valves. This method of supplying oxy gen is very costly, and is also inconvenient in practice for the reason that the pressure ?asks are heavy and require constant regulation. In contradistinction thereto the present inven tion relates to an oxygen rescue apparatus in which oxygen is supplied by per se known com . positions generating oxygen by the thermal de 15. composition‘ of chemical substances, more par ticularly chlorates and perchlorates. Said sub stances can either be accommodated in the form of a moulded body in a generator '?ask designed for repeated use, or’ be ?tted in a closed con 20 tainerwhich is discarded after a single use only, the oxygen’ generating body being held therein ?rm and secure against shook by means of _ a heat insulating and ?ltering sheathingenclosing it on all sides in the manner of a cartridge. De vices of this kind are described, for example, in British speci?cation No. 451,170. When the oxygen-liberating substance and its container: is simply placed in the case therefor there is always the inherent danger that me 301chanical in?uences‘ (a shock or the like) may bring about unintentional ignition of the oxygen‘ liberating substance. There is also the possi bility of the case being closed up after the rescue work without removing the still highly heated and 35; in‘ many cases not completely consumed oxygen liberating substance therefrom. The accumula tion of heat ensuing from such procedure, may lead to damage to the whole apparatus and par ticularly to the respiratory bag. The need thus an, arises of designing an apparatus that is com pletely proof against such contingencies and the consequent disadvantages. The present invention aims at protecting oxy-' gen rescue apparatus of the foregoing kind 45.- against improper handling by ?tting the con tainer for the oxygen-generating substance, to gether with the ignition cap connected» thereto in a housing or box in such a way that uninten tional i. e. premature ignition is made'impossible, 50. and that after the ignition device has been oper ated the apparatus is prevented from closing by a locking device until the oxygen-generating sub stance or the container holding same is removed. This can be effected for example, by disposing 55;» the container receiving vor-containing the oxygen generating substance, in the housing case in such a manner that in its inoperative position it lies flat on the ?oor of the box with its ignition'cap immediately adjacent the wall of‘ the housing'and thus protected from being unintentionally actu Cl. ated, from which for the purpose of operation it is raised by means of a lever into an inclined positionv in which said ignition cap is freely‘ ac cessible. In order moreover to prevent the box from being closed when novlonger required, with out previous removal therefrom of‘ the consumed mass, or the container containing same, a look ing device is provided which is brought into the engaging position either on actuating the igni tion device or on lifting the container into the 15 inclined position, and which inzthis position pre vents the box from being closed, and which can only be released after the oxygen-generating sub stance or its container is removed, thus enabling the case to be closed. The frame holding the N) 0 container may itself be adapted toserve- as the locking device, being held locked in the raised position until the consumed mass or the container is removed from the box. ' In order more clearly to understand the inven tion, reference is made to the accompanying drawings, which illustrate diagrammatically and by way of example, one embodiment of apparatus in ‘accordance therewith and in which: Figs. 1 and’ 2 are elevations of the apparatus in the open and closed positions; I Fig. 3 is a plan of said apparatus; Fig. 4 is a detail on a larger scale. In these drawings it has been assumed that the oxygen-liberating substance is snugly disposed in a ‘container in the manner of a cartridge for use on one occasion only, and‘ that two such cartridges are provided which act on a common oxygen feed pipe. This arrangement enables oxygen to be supplied either from one container , only or from both containers simultaneously, and thus to adapt the quantity of oxygen to the mini mum and maximum requirements of the patient. Atthe same time said arrangement enables an exhausted container to be replaced by a fresh one 4 5 when necessary, without completely interrupting the supply of oxygen. ' Referring particularly to Figs. 1-3, ‘a base plate 0 is pivoted on the hinge m, in a protective housing or box (1 provided with a suitable lid ‘(not 50 shown), said plate being provided at both ends with rests for receiving the cylindrical containers at supplying the oxygen. At the top end of each container there is provided‘ an ignition knob‘ by which lies‘close to the-wall» of the housing-when‘ 2 2,121,084 the plate is in the lowered position, while its lower ends are provided with pipes f and g for leading away the evolved oxygenv to a main pipe k with connection piece Zby way of the connection cocks h and 2' respectively. e is a notch catch ?tted lowered into a position substantially flush and in parallel with the bottom of said housing or box, and, upon opening of said lid, to be raised into an inclined- position, a cartridge detachably secured to said base-plate containing an oxygen~ generatingsubstance and provided with an igni tion device, said cartridge being so disposed on between the two containers and provided with a spring, said catch locking the base-plate in the raised position when said plate is raised into said base-plate that said ignition device is ac the working position with‘the aid of the handle ‘ cessible for operation only when said base-plate 10 ‘it. Connection pipes f and g are made of metal, in order to avoid their being damaged by the’ heat, and in accordance with the invention they serve at the same time as levers to open or close the valves h and 2‘ respectively. Springs f1 and 15 91 respectively cause an automatic closing of the valves 71, and i when the screw coupling is dis connected. When the apparatus is put into use the lid of the box is ?rst opened and the base plate to 20 gether with the containers lying thereon is raised by means of the handle n until the catch 6‘ springs into locking position (see Fig. 1). The ignition caps, hitherto protected from being actuated by is in inclined position, and means, operating on 10 said ignition device being actuated, for prevent ing the closing of said lid upon said housing or box as long as said cartridge is in position on said base-plate. 2. Apparatus for generating oxygen, compris 15 ing a housing or box provided with a lid, a base plate pivotally secured near one of its ends to said housing or box so as to be adapted to be lowered into a position substantially ?ush and in parallel with the bottom of said housing or box, and, upon opening of said lid to be raised into an inclined position, a cartridge detachably secured to said base-plate containing an oxygen the wall of the box, are thus exposed. After ac tuating the ignition device a uniform current of oxygen is evolved, the dissipation of the heat generating substance and provided with an ig nition device, said cartridge being disposed on 25 thus developed being facilitated by the inclined base-plate being lowered, said ignition device is position of the container 0.. The oxygen passes through the pipes 1‘ and/or 9 and through the valves h and 2' respectively into the main pipe is, and is conducted through the connection I to the place of consumption. Referring to Figs. 3 and 4, p is a catch-plate pivotally secured to the mounting plate provided with a counter spring and having noses 101, p2, 213, said catch-plate being held in the cooked posi tion by means of a spring bolt, provided with a nose p7 engaging the nose p; as long as the ig nition pin, which on being actuated, acts on the spring bolt by means of a bell-crank lever, is said base-plate in such a manner that, on the adjacent to and protected from being actuated by, one of the walls of said housing or container, while being freely accessible on the base-plate when in an inclined position, and means, operat ing on said ignition device being actuated, for preventing the closing of said lid upon said hensing or box as long as said cartridge is in posi tion on said base-plate. 35 3. Apparatus for generating oxygencomprising a housing provided with a cover, a base plate pivotally mounted near one of its ends in said housing whereby said base plate may be raised from an inoperative position within and substan not operated. If this locking be released by the operation of the ignition cap I), the catch-plate an inclined or operative position, a cartridge con will ?rst turn under the action of the spring taining oxygen-generating ‘material detachably tension only until the nose pa snaps into a notch secured to said base plate, an ignition device on said cartridge at the end farthest from the base 45 catch p4 which in turn is provided with a nose 29s and a spring 295. This causes the nose in to tiallyv ?ush with the bottomrof said housing to plate pivot, said cartridge being so arranged on 45 protrude over the wall d of the box and thus said base plate that said ignition device is ac prevents the base plate being lowered to the floor cessible for operation only when the base plate is in operative position, means for locking said base plate in operative position comprising a three-nosed catch plate pivotally mounted on said base plate, a spring attached to said base of the box once the ignition device has been operated. The arrangement is such that the spring tension applied to the catch plate 11 is prevented from rotating it any further by the nose p2 resting against the wall of the container a’ as long as the latter remains in the box. Not until the container is removed can the spring rotate the catch-plate any further, i. e. to such an extent that the nose p3 presses back the nose p5 and therefore also the notch catch m. In this position a cam mounted on the springlps 60 secures the notch-catch, so that the catch-plate p can now be returned to its original position until the nose m is in position behind the nose of the spring bolt p7. The simultaneous move ment of the nose p1 exerts tension on the spring 65 ZJ‘s, so that the cam mounted on said spring re leases the notch catch in, the latter returning to its original position. In the meantime however, the nose 101 has returned to its original position, thus enabling the base-plate to be lowered and 70 therefore the case to be closed. I claim: 1. Apparatus for generating oxygen, compris ing a housing or box provided with a lid, a base plate pivotally secured near one of its ends to 75. said housing or box so as to be adapted to be 40 plate and said catch plate tending to'force the latter into and beyond locking position,'means for holding said catch plate in a neutral or cocked position, means actuated by the opera 55 tion of said igniting device for operating said holding means to cause the same to release the catch plate thereby allowing the‘ catch plate to take a locking position'with one of its noses in engagement with the housing and another of its noses in engagement with the cartridge. 4. Apparatus for generating oxygen comprising 60 a housing provided with a cover, a base plate pivotally mounted near one of its ends in said 65 housing whereby said base plate may be raised from an inoperative position within and sub stantially flush with the bottom of said housing to an inclined or operative position, a catch for holding said base plate in operative position, a cartridge containing oxygen generating material detachably secured to said base plate, an ignition device on said cartridge at the end farthest from said base plate pivot, said cartridge being so arranged on said base plate that said ignition 75“ 2,121,034 device is accessible for operation only when the base plate is in operative position, means for locking said base plate in operative position when the ignition device is actuated said lock ing means comprising a three-nosed catch plate pivotally mounted on said base plate, a spring 3 ing said notched member forward toward said catch plate, a notch of said notched member being so positioned as to receive‘ and hold the ?rst mentioned nose against backward move ment when the catch plate is in looking posi tion, a spring arm‘ provided with a cam mounted attached to said base plate and said catch plate on said base plate adjacent said notched member, ignition device and said catch plate‘ for engaging member in retracted position, removal of said 10 cartridge from said base plate freeing the afore said third nose thereby permitting said catch tending to force the latter into and beyond lock- v a second notch in said notched member arranged ing position, a spring bolt arranged between said - to engage with said cam to hold said notched one of the noses of said catch plate to thereby hold the latter in a cooked position, means ac tuated by the operation of said ignition device for operating said spring bolt to cause the same to 15 release said nose thereby allowing said vcatch plate to turn to locking position with a second nose of said catch plate in engagement with said housing and the third nose of said catch plate in engagement with said cartridge, a notched mem ber pivotally mounted on said bed plate adjacent said catch plate provided with a spring foriorc plate to turn so that said ?rst mentioned nose forces the notched member into retracted po sition, resetting of the catch plate to cocked posi tion by turning the same against the spring ten 15 sion effecting a simultaneous release of the notched member from retracted position by the aforesaid second nose acting upon the end of said 20 spring arm. MAX HAUSMAN'N.