Патент USA US2405735код для вставки
Aug., m, w45. Y W, P. CRQCKET-r' ’HOSPITAL PLUG CONNECTION, Fíled'Jan. 24, 1944 27 /fl//AMI `\"gg "E _E ' ¿405335 Patented Aug. 13, 1946 '2,405,735 UNITED STATES PATENT OFFICE t 2,405,735. ' l HOSPITAL `PLUG CONNECTION'> ÍWi-lliam Crockett, Chicago, Ill., assignor to S. H.. Couch Company, Inc.,> North Quincy,` Mass.,v a. corporation of Massachusetts - Application January» 24, 1944,; SerialLNo. 519,523-r 4.C..laîms. (Cl. 200e-51) 1 2 Thisinventionhastodo with'l hospital plug. con trical circuits are provided> for in the connection,` nectionsgof‘ the type in which the signal.y or signals. controlled bythe push button on the- cord lead ing to the patient’s bed are. automatically actu:-` ated. in. thel event> the. plug. isinadvertently pulled from the connection.. The principal object_of theinvention is. to. pro vide an> improved hospital plug. connection ofthe type. described which issimplein design, inexpen sive tofmanuiacture, dependable,inkoperatiom and easy »to shutoiî. one ordinarily lights» a signal lamp 20 on the face plate, another lights> a lamp over` the outside of the; door leading in_to the» room, another. lights a lamp at, the nurses’ central station and another sounds an annunciator. Five openings I6 are employed in this particu lar connection, to enable fourI electrical circuits to be» handled, but a lesser or greater number might instead> be employed, depending onV the number off circuits desired. The ñve openings It> are ar Othermorespeciñc objects and advantagesv of ranged in a circle about,y the front- of the cylindri the invention will» be apparent-.tothose skilled. in calfA portion I4, and are spaced apart one-sixth the the art upon afull understanding ofthe construc distance about the circle, leaving a substantial l5 gap, at. 25|; between the two uppermost openings. tion andthe operation of the new. connection. A preferred embodiment. of the invention is tof insure the contacts; Il being inserted, in the presented herein byway of'exempliiication, but it correct openings. The cylindrical portion I4 will; of; course be appreciated that the invention contains a disk 22 of insulatingÍ material which is is> susceptible of incorporation in other structur provided with. a plurality of; openings 2-.3 inreg ally modifiedv forms coming equally. within the> 20 ister- withV the openings It. The openings 23 are scope of the appended claims, ' ofw slightly smaller size than the openings I6 to In the accompanying drawing: prevent; the contacts I‘I from being short circuitedV through theA cylindrical portion I4 when the plug Fig. 1y is a face View of a hospital plug connec t8. is i-n place. tion constructed in accordance with ther inven tion; Y , Fig, 2. is a side View of the connection, showing theplug used with the same ; Fig. 3 is a vertical section throughthe connec A. block 24 of insulating material is; positioned behind the diskY 2-2 in rearwardly spaced relation tothe; same. The block 24' is, substantially cylin drical in shape and is provided about its periphery withsix longitudinally extending grooves 2.5. The tion., taken on the line 3,-3 of Fig; 1, showing it with the plug removed andthe several signal? con 30 uppermost one of theseA groovesy forms a seat` for one. leg of an L-shapedy bracket 26. The bracket trolling contacts shortcircuited;Fig. 4 is.Y another vertical section through the is secured> within the groove by a screw 21, and the upstanding leg, of the bracketV is- welded or connection, taken on the line 4-.4' of.' Fig. 3; and Fig. 5 is a section similar-to Fig. 4‘,V showing-the otherwisesecured tothe backV oi the flange I5 of the. spanner» plate. The remaining grooves 25 connection with the switch in the same manuallyy form seats for the reception of ñve` leaf spring setto hold the several. circuits open. contacts.v 28 which project forwardly` from the The hospital> plugy connectionV shown in the grooves into positions where they will bear resil drawing includes aiace plate Ill-which is adapted iently against the outer sides of the contacts I‘I to be attacl'iedY by screws> II tothe wall of the patient’s room. The face plate lllcontains a. cir 40 when the plug I8î is in place. The rear ends of` cularV aperture I2 in» which a spanner plate I3 is> the` contacts 28 are rigidly held within thegrooves positioned; The spanner plate I3 has a cylindri 2.5; by screws 29 which also support connectors 30 cal portion t4 which projects forwardly through for. the several electrical circuits.` One of the the apertureand a radial ñange I5; which is weld connectors 3G carries the current, whilel the other ed orV otherwise secured to the back; of the face 45 connectors lead tothe various signalling devices. plate about the aperture; The; cylindricalporti-on The block 24 is supported. at its center on a stud- 3I. The stud 3l isl provided in front of` the Ill- of thespanner plate is provided in the front of block 24 with an enlarged portion 32r and is: pro the same with a. plurality of- openings IB' for' the videdv inj- front of such enlarged portion with a reception. of a corresponding number of prong shaped contacts Il on a removablepliig I8. ’Ijhe 50 reduced portion 33, which reduced portion ex tends through the disk 22 and is riveted or other plug I8 isattached to one end of a cord I9„ andk wisesecured to the center ofthe cylindrical por av push button (not shown) is attached to the. tion I4. of they spanner plate.. A disk 3.4 of insu other end of the cord. When the patient oper lating material is ÍìXedly clampedv between the` ates the push button several electrical Circuits. will be, simultaneously closed. Where four elec enlarged portion 32 ofthe4 stud and thcdisk 2.2, - 2,405,735 3 4 and a disk 35 of conducting material having an insert 35 of insulating material is ñxedly clamped between the front of the block 24 and the enlarged portion 32. »The rear end 31 of the stud is thread ed and is engaged by a nut 38 which secures the block 24 in place. are adapted to move into engagement when dis engaged by the contacts on the plug, whereby to automatically close the circuits leading from the connection when the plug is pulled, a movable circuit opening element which when moved man ually into one position will force the contacts in The periphery of the disk 35 vextends radially the connection away from the circuit closing ele ment,v means for moving lthe circuit opening ele beyond the bottoms of the grooves 25 into a _po sition wherein it will be engaged bythe leaf spring ment vinto said position, andV means controlled by contacts 28 when the latter are allowed to spring 10 and responsive to re-en'gagement of the plug and socket contacts for automatically returning the inwardly upon the withdrawal of the contacts I'I on the plug I8. Such engagementwill short circuit opening element to its original inoper circuit the contacts 28, automatically energizing ative position. prevent this from happening'when not‘r‘jdesired, or to open the circuits and keep them’open after'V it has happened, a disk 39 of insulating material it , 2. In a hospital plug connection for use with the circuits of the several signalling devices. ATo ~- »- ' a plug having aV plurality of contacts, a plurality of socket contacts for engagement with the con tacts on the plug, a stationary circuit closing ele is rotatably mounted on the enlarged portion 32 . ment with which the contacts in the connection are adapted to move into engagement when dis of the stud 3|, immediately in front of the shortV circuiting disk 35. The disk 39 is of smaller di 20 engaged by the contacts on the plug, whereby to automatically close the circuits leading from the ameter than the disk 35 but is provided about its periphery with live radially projecting bosses 4U connection when the plug is pulled, a movable cir cuit opening element which when moved manually which are adapted to cam the five leaf spring -con tacts 28 outwardly away from the disk 35 when into one position will force 'the contacts in the con lthe disk 39 is turned to bring the bosses 40 op 25 nection away> from >the circuit closing element, posite the contacts. Y means for moving the circuit'opening element into ksaid position, said movable circuit opening YThe disk.- 35i-which constitutes in« effect l a element being radially accessible for operation switch-is provided with a ñnger piece 4| »which extends upwardly through an arcuate slot 42 in and being movable when the contacts in the con the cylindrical portion I4 of the spanner‘plate 30 nectionA are engaged by the contacts on the plug, and means controlled by and responsive to re into an exposed and readily accessible position in engagement of the plug and socket contacts for front of the upper portion of theface plate.V 'I‘he automatically returning the circuit opening ele disk 39 is free to turn, and is normally held with ment to its original inoperative position. the bosses 40 'disengaged from the contacts 23 by a small wire spring 43 which is anchored to 35 3. In a hospital plug connection for use with a plug having> a pluralityv of contacts, a plurality Ythe Screw 2l and extends through a slot 44 in the bracket 26 into engagement with one side 'of of circularly -arranged socket contacts for engage the ringer piece 4 I . ment with the contacts on the plug, a stationary - ` Y circuit closing element with which the contacts 4I to cause the bosses 40 to cam the contacts 28 40 in the connection‘are adapted to move radially in When the disk 39 is moved by the finger piece hold the disk in that position, but as soon as the to engagement when disengaged by the contacts on the plug, whereby to automatically close the circuits leading from the connection when the plugispulled, a rotatable circuit opening element plug I8 is replaced the contacts I'I onlthe plug i which when turned manually in one direction Awill away from theshort circuiting disk 35, the» yield ing resistance offered by the frictional engage ' ment of the contacts 28 with the bosses 40 will will’cam the contacts 28 farther outwardly, reliev force the contacts in the connection radially away from the circuit closing element, means for ro the disk 3S to return to its inoperative position tating the circuit opening element in said direc tion, and means controlled by and responsive to under the action of the spring 43. Instead of us ingï a spring for this purpose, a small weight 45V 50 re-engagement of the plug and socketcontacts for automatically returning the circuit opening ele can beattached tothe front face of the disk 39 ment to its'original inoperative position. to accomplish the same result, or both the spring ing ¿the pressure Aon the bosses 4U and allowing ' 4. In a`hospital plug connection for use with 43 and the weight 45 can be employed.v Y a` plug having a plurality of contacts, a plurality It willbe understood from the foregoing that all of the circuits leading'from the connection 55 of 'circular-ly arranged socket contacts for en will be automatically closed'in the event the plug gagement with the contacts on the plug, a sta is accidentally pulled from the connection, and tionary circuit closing element with which the that the circuits can be opened again by movingy contacts in the connection are adapted to move the finger piece 4I into its circuit opening posi radially into engagement when `disengaged by the tion. When the plug is intentionally pulled, as 00 contacts on theplug, whereby to automatically when the bed isto be moved 0r the .wall of the close the> circuits leading from the Vconnection room to be cleaned, closing of the circuits can be when the plugis pulled, a rotatable circuit open prevented by moving the linger piece into its cir ing element which when turned manually in one cuit opening position and holding it momentarily directionwill force the contacts in the connection in that position While pulling theplug: After the 65 radially away from the circuit closing element, plug has been pulled the ñnger piece will be held means for rotating the circuit opening element frictionally in its circuit opening position until in said direction, and means controlled by and responsive to re-engagement of the plug and the plugY is again replaced, after which it Will re- Y turn automatically into its inoperative position. socket contacts for automatically returning the Iclaim: - Y l. In a hospital plug connection for use with Y a plug having a plurality of contactsa plurality circuit opening element to its original inoperative position, said last mentioned means consisting of a spring which will yield resiliently to permit the of> socket contacts for engagement with the con-v circuit> opening member to be turned into its op tacts on the plug, a stationary circuit closing ele erativeposition. ` ment with which the contacts in the connection ‘ ’ " ` " , WILLIAM P. CROCKETT.