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Aug, 29» 19%. o. M. BURKHARDT SELECTOR COCK Filed A9111 14, 1945 2 Sheets-Sheet 1 ' - ‘i ’ INVENTOR. ' Orro M. BURKHARDT BY - , ATTORNEYS Aug, 299 39461 Io. M. BURKHARDT > $459534 SELECTOR COCK Filed April 14, 1943 \\\\\\\ ; YIIIIIIIIIIIIIII; I H 2 Sheets-Sheet 2 II’IIIIIII" 0/11 INVENTOR. OTTO M. BURKHARDT BY I MWfyV/VM . ATTORNEYS. , Patented Aug. 20, 1946 2,405,940 " UNITED" STATE s ' 2,405,940 * I ‘ , ,i SELECTOR'COCK om M. Burkhardt, Euclid, Ohio ~ Application April 14, 1943, Serial No. 483,033 1 . . This invention relates to the? art ofv selector ‘ I 2 . . . improved means for partially and controllably releasing. the sealing engagement of the cock during the adjustment thereof and for automat cocks for controlling the ?ow of ‘liquids. ' The prior art contains cocks for selectively con ically returning the cock to fully sealing en trolling the flow of liquids from one or more sup-. ply lines to an outlet for use or for. drainage, as Ul gagement in such manner as to facilitate the found for instance in the U. S. Letters Patent ‘ adjusting movement of‘the cock and to limit such release to anexact amount so as‘ to maintain proper sealing effect at all times, even during such adjusting movement of the cock. ef?cient sealing means in order ‘to prevent leak ing at any time, even under high pressures. This 10 ; Another object is to provide such a device with to Koehler Nos. 2,226,169 and 2,233,840; and it is wellvknow-n that such a control device requires improved means for automatically determining and indicating when the particular. adjusted posi involves sealing means of a resilient nature but experience has shown that suchselector- cocks require considerable effort to manipulategand, tion has been accomplished. , ' I - Another object is to provide such a device that for this reason, auxiliary'means have been em ployed, for‘ the purpose of reducing the pres sure between the sealing surfaces, thereby reduc 15 is of simple construction, can be easily manufac ing the, turning effort as -Well as wear and dis dependable in its action under all normal circum tortion of the resilient sealingmeans. _ v, , I tured, installed, removed and repaired, and is stances. I I . Other objects will appear from the following I When used on, modern aircraft, these, selector cocks are usually so located that a remote con 2.0 description and claims when considered together trol means has to be adopted; and, in order, to employ a simple and light form-0f suchcontrol mechanism, it is vnecessary that the selector» cock with the accompanying drawings. Fig. Us a viewillustrating the generalorgan ,ization of my improved selector cock and the con require only a minimum of .effortto. operate it. trol means therefor; , I . ' It should be noted'also that in modernaircraft 25. .Fig. 2 is a topplan view of the selector cock ?re hazard aloneImakes the requirements ex itself; tremely rigid as to the seal against gasoline leak, ageat any time. , __ I_ . It is also desirable that there be some means ‘for automatically arresting the selector. cock in certain predeterminedpositions so as to indicate when such particular positions have been estab lished, as for instance when av particular’ feed I >_ I’ I ' r . ' Fig. 3 is a view taken on line 3—-3 of Fig. 2; r Fig. 4 isatop plan-view of thecontrol means forthe selector cock; . I . ' I Fig. 5 is a View taken on-line 5-5 of Fig. 4; .r Fig. 6 is a view taken online 6-6 of Fig. 3; Fig. 'l is a view taken on line 1-4 of Fig. 6; and 5 1 __ _ let or has been shut off. No prior attempts to Fig. 8 is a view, mostly diagrammatic, illus trating the electric controlmeans. for the sole accomplish such object have yet proved entirely noids "of the plungers. line has been brought into registry with the ‘out satisfactory, so far as I am aware. One serious difficulty with such prior devices is that very often the edges of the ports in the cock cut the seal ing surface edges or cause waves and distortion 40 and hence leakage. I Having in mind the requirements ofsuch a de vice, my present invention is designed to accom ‘ ' ' 7 It is to be understood that the present form of disclosure is merely for the purpose of illus tration and that there might be devised various modi?cations thereof without departing from the spirit‘of my invention as herein set forth and claimed.‘ 1 ' which such change can be made witha mini, The main housing I has the threaded ports 2 and,3, respectively, for connection of tubing for the liquid'from the supply'tanks, and the thread ed outlet portd for connection, of its tubing. .These ports‘are' adapted to be controlled by the cone-shaped.’ cock 5 which may be of metal and has suitably spaced vopenings therethrough for registry with the ports 2, 3 and 4. The inner mum loss of liquid, even under considerable pres face of the housing has-secured thereto a con. sure'in the line or lines- Another object is to provide such a device with tinuous annularfacingof suitable ?exible seal ing material 6, as for instance synthetic rubber, an improved form of sealing means for the cock. which is‘ formed with a continuousannular band Another object is to provide such a devic'ejwith portion of increased thickness, as indicated at 6a, plish several speci?c objects. One object of my invention is to provide such a device in which the change from one selected position to-another can be made with a minimum of effort. Y , _ 7 Another object is. to provide such a device in _ . ,I I 2,405,940 . 6 '5 ations in mind, I have made my present pro starting torque is first applied in an attempt to visions so as to better adapt such a device for turn the cock 5, the handle‘ 25 alone will be moved because of the great initial resistance to such turning movement, as above explained; and such movement of the handle 25 will bring the contact 30 into engagement with one of the con remote control, as for instance in the case ‘of aircraft, as above explained. That is to say, I have here provided an improved form of sealing engagement at the several ports; I have provided means for momentarily withdrawing the spring arresting plungers from engaging position upon initiation of the rotative adjusting movement; tact arms 3!, thereby closing the circuit through positive and dependable manner. ready to drop back into the recesses or seats the solenoids 23 for withdrawal of the arresting plungers 2| from engaged position. While with and I have devised an effective notch or ser 10 drawal of the plungers reduces substantially the ration means of interengagement between the resistance to the adjustment of the cock 5, yet operating shaft l4 and the stem of the cock 5 the remaining resistance thereto is still su?icient as a means for raising the‘cock and thereby re to hold the electric circuit closed through the lieving the compression of the sealing material solenoids until the cock 5 has been turned su?i preparatory to adjustment of the cock 5. , Inci 15 ciently to bring the recesses 22 out of the region dentally, I have provided also a means for limit of their arresting plungers 2 !_ ing the raising of the cock 5 to an extent that These parts are so constructed and arranged may be equal to or a little less than but never that the handle 25, when only normal turning more than the amount of the axial yield of the effort is-required, will occupy neutral or ?oat sealing means, such limitation being essential to 20 ing position between the springs so as to hold the prevent the cock v55 at any time from being lifted bar 38 in middle or idle position and hence not entirely free from its sealing means, which of in electric contact with either of the arms 3!, course would cause leakage of the liquid. With as in Fig. 4 of the present drawings. The these several inter-related ‘features of improve plungers 2! then, under the influence of the ment, I not only facilitate the rotative adjust 25 springs 2m thereof,ride on arcs of ‘concentric ment of the cock in'a highly efficient manner but circles with a minimum of resistance, as the hol there is also ensured the seating of the cock in a low shaft i4 continues to be turned, and‘ are These are the features which constitute my present invention, 22 when brought into registry therewith and to together with any and all auxiliary features of 30 thereby arrestthe turning motion with the full construction and arrangement which are in force of the springs 2 la of the arresting plungers volved therein. My means for momentarily withdrawing the arresting plungers 2! from their notches or seats 22, consists of the solenoids 23, one for each an resting plunger, these solenoids being included in an electric circuit which is adapted to be ‘closed automatically at the start of turning the handle 2i. ' ' The angular movement of the handle 25 alone, as the initial step in the operation of this de vice, is madevpossible by the combined resistance to the'turning of the shaft it, which‘is greater than the resistance of springs 33, as above ex plained.~ According to my present invention, the 25 which is preferably of dielectric material, the resistance between the plungers 2i and their seats starting torque of the cock 5 being greater. than 40 22 is ?rst relieved by automatically withdraw that required for continued operation after with ing the plungers 2! immediately upon applica drawal of the arresting plungers from engaged tion of starting torque to the handle 25, as ex position. The handle 25 has electric contact plained; and a further small amount of motion ?nger 28 in constant engagementrwith the an then raises the stem H due to the wedge action nular electro-conductor ring 2'! which is located 45 of the‘ serrations I? and I 8 so as to relieve the upon the dielectric support '28 upon which the compression of the sealing material, the cock 5 handle 25 is rotatably mounted and within easy being raised against the tension of spring. 8. reach of the operator, the support being mounted These two factors appreciably reduce the resist_ for instance as part of the panel board of the ance, and the handle 25 and the bar 30 will then pilot’s cabin, as indicated by reference letter P. 50 assume ?oating position between the arms 31 so There is a source of electric current 29 in'the as to break the electric circuit through the sole circuit which includes ‘the ring 27 and, the sole noids; and such condition will continue through noids 23,_the other side of the solenoids being out the remainder of the turning movement of grounded. Although only one plunger andv sole shaft i4. As a result, the plungers 24 are re noid unit is indicated in the circuit illustrated 55 leased from the holding influence of the solenoids in Fig. 8 of the present drawings, it is to be and are then ready to snap back into engagement understood that all of the plunger and solenoid I with their notches or seats to arrest the rotative units are included in the same circuit, as will movement of the shaft Ill exactly when it has be readily understood from the present disclosure. ' been continued to the point of full‘registry of The ?nger 28 has electric connection with the 60 the desired ports. electric conductor bar 33 which is mounted upon The rotative movement of shaft ill, upon with the dielectric handle 25 and which is adapted drawal of plungers 2|, will effect a wedging ac to be brought into electric contact with either of tion between the companion sets of serrations H the electro-conductive arms 3! mounted upon the and [8 with the result that the stern II and its metal post, 32; this post being rotatable within 65 cock 5 will be lifted to a predetermined extent the support 28, and the handle 25 being rotat so as to reduce the frictional engagement be ably mounted within the hollow post 32,. The tween the cock and the sealing means against post 32 is connected to the shaft M for rotative which it seats, but without breaking the seal adjustment thereof and this side of the electric therebetween and thus without permitting leak circuit also is grounded. 70 age of gasoline at any time. Then, when the ,The handle 25 is normally held in middle upper ?anged end N5 of the stem ll abuts the position, as indicated in Fig. 4- of the present stop, Hi, there will be no further axial movement drawings, by means of the coiled springs 33 or of stem ll, there being then established ?rm other suitable means arranged between the sides interengagement between the sets of serrations of this handleand the. arms 3!. But, when the l1 and I8 so as to‘thereafter effect only rotative 2,405,940 7 movement of the stem II and its cock 5 upon continued rotation of shaft M, such turning of the cock 5 serving to bring it to the desired posi tion. When the shaft l4 has been turned sum ciently to come close to the next position of reg CR of the handle 25 will permit the cock 5 to come help to turn the shaft M, as will be observed by rial also serves as a means of ensuring depend to fully lowered position. , It is to be noted that the raising and lowering of the cock 5 take place while the cock is other wise in still position and thus the sealing material is not subjected to the deforming action that istry of the cock 5, the recesses or seats 22 will would otherwise result from such movements of again come before the plungers which will then the cock while being rotated. That is :to say, the snap into engagement therewith so as to thereby partial and full engagement between the cock 5 locate and secure the cock 5 in its newly estab lished position where it will remain until again 10 and its sealing material is, in each instance, ef fected along a substantially rectilinear path. changed in the manner above described. Also the danger of deforming the sealing mate It is to be understood that the notches or ser rial is still further reduced by having the same rations ll and I8 may be so designed as to per of continuous and smooth form so that there are mit the cock 5 to be turned in either direction no edges that can bulge into the holes of the with the same degree of efficiency. cock, to be sheared when these holes are sealed When the spring plungers 2! start to snap into over, The raised portion 5a of the sealing mate locking position, as above explained, this will the operator who may at once discontinue the able sealing eifect and relieving friction during application of turning force to the handle 25; whereupon there is no longer any wedging action the rotative adjustment of the cock. Further between the notches ii and iii to hold the stem H and its cock 5 in raised position, with the result that the cock is then free to be lowered by the influence of the spring 13 so as to again ing action therein which means that the sealing material will not lose its normal sealing effective occupy fully seated position. By virtue of the wedge form of the companion serrations IT and I8, the spring 13 will prove more, this formof sealing means ensures a knead ness and that its life of usefulness will be pro longed. Also, by precluding the danger of de formation or undue wear of the sealing material, there is ensured practically no loss of liquid even when under high pressure. With my form of sealing means, as herein set effective at once in bringing the cock 5 to fully lowered position and there is no danger of the 30 forth, there is precluded the necessity of having blind ports which are provided in other devices cock remaining in raised position. That is, the of this same general nature; and I regard that serrations or notches I? and iii are of su?iciently as an important improvement in the art. steep pitch to ensure such immediate and com By reducing to a minimum the resistance dur plete lowering of the cock 5; and yet the pitch ing the rotary adjustment of the cock 5, it is of these serrations is such as to permit relative possible to employ this device with remote control movement between the same in order to effect with a high degree of e?iciency and dependabil the raising of the stem l l and the cock 5 in the ity at all times. manner above described and before rotation of With my present improved form of device, there - the shaft and its cock is started. According to is ensured maximum flow of the liquid with min the present form of illustration, these serrations imum resistance to such ?ow, emphasis being H and 18 are shown as having an angle of ap placed in this connection upon the means which proximately 45 degrees although I do not mean I have provided for ensuring full registry of the to limit the invention to this particular angle. ports and complete sealing of the cock. The clearance between these serrations, as above mentioned, is also an important factor in this " Also, the angular form of the notches or serra tions i1 and I8 ensures opening of the cock in connection an efficient manner and ensures also immediate The location of the notches or seats 22 for the return of the cock to fully lowered position with arresting plungers 2!, the location of the ports out any danger of sticking. . Likewise, these in the cock with respect to those in the casing, wedge-like serrations H and I8 prove most em and the engagement of theserrations ii and i8 cient in relieving the engagement of the‘ cock with are all so constructed and arranged that, when its scaling material, as above explained. the plungers have fully entered their seats and By virtue of my particular arrangement and the cock 5 has been fully lowered, there will always be ensured a perfect registry between the operation of the two series of companion notches or serrations H and I8, it is possible to employ port in the cock and that in the casing to which a large number of comparatively shallow notches it has been moved for communication there which can ‘be produced more economically than through. The clearance between the sets of com a few comparatively deep notches and which will panion serrations IT and I8, as above explained, afford a greater aggregate bearing surface, and is an important factor in this connection also. also will not be subject to wear and consequent Thus it will be seen that, in my present de loss of‘ accuracy which would result from notches vice, part of the resistance to the rotary adjust of comparatively deep form. ment is ?rst and at once relieved, then the cock Furthermore, the interengagement between the is lifted so as to reduce the resistance still fur two sets of serrations H and i8 serves to hold the ther and at the same time to avoid turning against the compressed- sealing means, and ?nally the 65 cock in the position to which adjusted; and this is true also of the engagement of the plungers in cock is turned. This series of movements is ini their seats. Then, too, by virtue of the initial tiated at once upon attempting to turn the han release of the plungers, as herein provided, they dle ‘£5 and they are carried out in this sequence may be designed with greater holding force than without any particular attention by the operator. Then, when the desired position has been reached 70 would otherwise be possible. Likewise, there can provided suiiicient pressure for complete seal for the cook, the return of the plnngers to their ing engagement of the cock with its sealing ma notches tends to assist in the remaining turning terial, more so than would otherwise be possible, operation, which will be noticed by the operator, since part of this pressure is relieved in an e?i and the full seating of the plungers will tend to stop such rotary movementof the cock. Release cient manner before initiating rotary adjustment 2,405, 940 , 10 9, of the cock; and thus there is no danger of the rotary adjustment being hindered by such eifec tive pressure of the cock against its seat, especially in view of my particularly efficient and depend able means embodied in the wedge-like serrations l1 and I8, as herein disclosed. Instead of the hand crank or handle 25, there may be provided a crank and suitable connec holding means ineifective, said lever and crank having companion electric contacts for control ling the circuit of said electric means and adapted to be closed by the application of extraordinary force upon said crank in the direction of opera tion thereof. 5. vIn a valve structure, the combination of a valve seat, a valve therefore rotatably adjustable from one position to another, resilient sealing tions for operation by a small electric motor to gether with a conveniently located electric switch 10 means between said valve and its seat, means for for control thereof. - Thus my present form of device, by virtue of the speci?c features herein emphasized, me‘etsthe requirements of aircraft as above pointed-out, although the use of this device is not to be under stood as being limited to any particular ?eld of arresting and holding said valve in adjusted posi tion, means for adjusting said valve, said arrest ing and holding means vand said sealing means together constituting a combinedresistance to the adjusting operation of said valve when in seated position, said valve-adjusting'means including a forked lever and an operating crank therefor, Furthermore, this device is of simple construc resilient means between the two sides of said tion, it can be easily manipulated, it is of light crank and the forks of said lever so as to provide weight, it can be easily manufactured, installed, 20 a ?oating arrangement for said crank during ap activity. > ' ' removed, repaired, and is dependable in its opera plication of normal torque thereto for adjustment tion even to the extent of the rigid requirements thereof, electric means for rendering said arrest ing and holding means ineifective, said lever and of aircraft, as above explained. - ‘ What I claim is: 1. In a liquid control device, the combination of a valve seat of conical form with a plurality of ports therethrough, a continuous conical ring of resilient sealing material upon said valve seat, said sealing ring having an annular raised por tion continuously thereabout and having aper tures therethrough in said raised portion and cor responding with said ports, a valve of conical form for seating upon said raised portion and having ports corresponding with those of said valve seat, and means for effecting pressure of said valve upon said sealing material so as to compress said annular raised portion. 2. In a liquid control device, the combination of a valve seat of conical form with a plurality crank having companion electric‘ contacts for controlling the circuit of said electric means and adapted to be closed by application of extraor dinary torque to said crank as occasioned by said combined resistance, said parts being so con structed and arranged that relief of‘ part of said combined resistance, including that incident ‘to said arresting and holding means, will permit said electric contacts to open so as to release said arresting and holding means for return to eifec tive condition upon movement of said valve to proper position therefor. 6. In a liquid control device, the combination of a valve seat, a valve therefor rotatably adjust able from one predetermined position to another, spring-actuated plunger and detent means for of ports therethrough, a continuous conical ring 110 locating and holding said valve successively in of resilient material upon said valve seat, said such positions, means for withdrawing said sealing ring having an uncon?ned annular raised plunger means so as to facilitate movement of said portion continuously thereabout and having aper valve from one position to another, means for tures through said raised portion corresponding with said ports, a valve of conical form for seat ing upon said raised portion and having ports cor responding with those of said sealing ring and said valve seat, and means for effecting pressure of said valve upon said raised portion and for relieving such pressure during the seating and adjustment of said valve, respectively, so as to thereby effect a kneading of said uncon?ned raised’ portion of the sealing material. 3. In a valve structure, the combination of a valve seat, a valve therefor adjustable from one position to another, means for holding said valve in adjusted position, means for adjusting said valve, electric means for rendering said holding means ineffective, and an electric switch adapted to control the actuation of said electric means, said switch being co-ordinated with said valve adjusting means for closing momentarily by the initiatory movement of said valve-adjusting means. effecting adjustment of said valve, means, actuated automatically by the initiation of the operation of said valve-adjusting means, for effecting the actuation of said withdrawing means and for releasing the same after such withdrawal so as to return the same to the in?uence/0f its spring i action and thereby preparethe same for automatic engagement with another detent means when the valve has been moved to the eX tent of bringing the plunger and detent means again into co-operative relation. 7. In a liquid control device, the combination of a valve seat, said valve seat being of conical form and having a plurality of ports there through, a continuous conical ring of resilient sealing material upon said valve seat, said sealing ring having an annular raised portion continu ously thereabout and having apertures through said raised portion corresponding with said ports, a valve of conical form for seating upon said raised portion and having ports corresponding 4. In a valve structure, the combination of a with those of said valve seat, means for effecting valve seat, a valve therefor adjustable from one pressure of said valve upon said sealing material position to another, means for holding said valve so as to compress said annular raised portion, in adjusted position, means for adjusting said means for holding said valve in adjusted posi valve, said valve-adjusting means including a tion, means, actuated automatically by the initia forked lever and an operating crank therefor, 70 tion of the operation of said valve-adjusting resilient means between the two sides of said means, for rendering said holding means ineffec crank and the forks of said lever so as to provide tive, said valve having a stem provided with an a ?oating arrangement for said crank during nularly arranged series of plain-faced wedge application of normal force thereto for adjust like notches, an adjusting member rotatable in a ment thereof, electric means for rendering said ?xed path and provided with annularly arranged 2,405,940 12 11 companion series of plain-faced; wedge-like notches capable of inter-engaging relation. to about and having apertures therethrough in said raised portion corresponding with the ports of those of said valve stem, whereby initiation of the rotation of said adjusting member will release said holding means and will produce wedging action between said series of notches and there by cause substantially straight-‘line movement of said valve for partially relieving the pressure of said sealing means,- means for limiting such straight-line movement of said valve to a pre 10 said‘ members, and means for effecting pressure of said valve member-upon said valve seat mem- tion. 9. In a liquid control device, the combination determined extent so as to ber and having ports corresponding with those of maintain inter engagement between said series of notches for torque transfer and so as to maintain a seal for her so as to" compress said annular raised por of a member having a valve seat of conical form with a plurality of ports therethrough, a valve member of conical form for said valve seat mem said valve seat member, a continuous conical ring of resilient sealing material upon one of said members, said ring having an uncon?ned an said valve, whereby continued rotation of said ad; justing member will effect rotatable adjustment 15 nular raised portion continuously thereabout and having apertures therethrough in said raised por of ‘said valve without breaking the‘ seal of said tion and corresponding with the ports in said valve. members, and means for effecting pressure of 8. In a liquid control device, the combination of a member having a valve seat of conical form with a plurality of ports therethrough, a valve member of conical form therefor having ports corresponding with those of said valve seat mem her,» a continuous conical ring of resilient sealing said valve member upon said valve seat member and for relieving such pressure during the seating and adjustment of said valve member, respec tively, so as to thereby effect a kneading of said uncon?ned raised portion of the sealing material. material upon one of said members and having an annular raised portion continuously there 25 OTTO M. BURKHARDT.