Патент USA US2112654код для вставки
March 29, 1938. 2,112,654 INTERVAL TlMER SWLTCH >Filed Aug. 28, 1954 w 2 Sheets-Sheet l ,un //l/m1 INVENTOR Frederick Lux. rWâ / / ' A770 EY March 29, 1938. F_ LUX 2,112,654 INTERVAL TIMER SWITCH -Filed Aug. 28,"1954 2 sheets-sheet 2 19 86 85 19a. _ / i' n] £1 ' 73 83 /I` Y "l ^í 56 /, ß ' \ g 88 27 £4 INVENTOR Fvedevich Lux Patented Mar.>`2b9, 1938 f 2,112,654 -UNITED STATES PATENT OFFICE 2,112,654 INTERVAL TIMER SWITCH Frederick Lux, Waterbury, Conn., assignor to Lux Clock Manufacturing Company', Waterbury, Conn., a corporation of Connecticut Application August 28, 1934, Serial No. 741,801 18 Claims. (Cl. 20G-37) This invention relates'to time-controlled ap the line 6_6 of Fig. 5, and showing the switch paratus, and more particularly to an interval in “closed” or operative position. timer adapted to operate a switch mechanism Fig. 7 is a fragmentary transverse sectional after the expiration of av predetermined period view taken along the line ‘I-l >of Fig. 5, show of time. . ing the switch in “open” or inoperative position. 5 One object'of this invention is to provide an Fig. 8 is a diagrammatic view of the switch electric switch mechanism which is controlled and circuit, showing the same connected as a by a clock movement and has associated there “single pole” switch. with a manually adjustable pointer for the dual Fig. 9 is a diagrammatic view of the same,_ purpose of closing the circuit through the switch, showing the connections fora “doublesingle lo and winding the clock movement to cause it to pole” switch. ì operate said switch after any desired length of Fig. 10 is a diagrammatic view of the same time. ' \ A further object is to provide a time-controlled switch of the above nature in which the pointer is associated with means for initially locking it on the outside of the dial, vmaking it necessary to press the pointer against the dial to close the electrical circuit before the pointer may 20 be turned to the desired time interval setting, means being also provided whereby the pointer ` may be turned backwardly in case it may have been set to operate at a greater time interval than desired. A further object is to provide an interval timer 25 of the ~above nature having two independent switches which are simultaneously operated by the clock mechanism, whereby various types of so 35 as it appears when connected as a “double break single pole” switch. ' . Fig. i1 is a fragmentary sectional view of a.15 modified form of time switch in which the clock work mechanism is rigidly held in the. clock frame, and the pointer shaft is movablewith re spect to same. Referring now to the drawings in which like N) 0 reference numerals denote corresponding parts throughout the several views, the numeral I Ii indicates a cup-shaped clock casing preferably made of molded insulating composition, such ,as “bakelitef’ The casing I0 has an open rear 25 end and a closed front end II which constitutes the clock dial, having the usual time-indicating scale I2 marked thereupon, herein illustrated as being graduated to indicate the sixty minutes electric switch connections may be accomplished. A further object is to provide an interval timer of the above nature which will be simple in of an hour, as shown in Fig. 1. construction, inexpensive to manufacture, easy to install and manipulate, compact, ornamental its back upon a flat surface, such as a table top in appearance, and very eñicient and durable in entering the casing I0, and a similar “lead-ou ” use. » Withthese and other objects in view there have been illustrated on the accompanying draw ings two forms in which the invention may be conveniently embodied in practice. ` In the drawings: Fig. 1 represents a perspective view of the in terval timer. Fig. 2 is an enlarged vertical sectional view 45 through the same. Fig. 3 is a perspective view of a portion of the dial and the pointer locking clip. Fig. 4 is a. detail perspective view of the cam 30 'I‘he clock casing I0 is adapted to rest with I3, and has a two-conductor “lead-in” cord I4 cord I5 passing out of said casing at the diam- 35 metrically opposite side. The “lead-in” cord I4 is provided with a two-prong plug I6 for en gagement in any convenient Wall outlet I'l. The “lead-ou ” cord: I5, however, may be provided with a plug socket I5a for completing the elec trical circuit through any desired power con suming device, not shown. The mechanism of the clock includes a spring motor generally indicated by the numeral I8, 45 and a pair of motor plates I9, Isa, held in rigid spaced relationship by pillars 20. The upper and lower portions of the motor plates are pro member and associated locking block. vided with alined apertures for slidable engage Fig. 5 is a transverse sectional -view through ment upon a. pair of horizontal upper and lower 50 the clock casing,‘showing the switch mechanism _ posts 2l and 22. The forward ends of the posts connected as .a double pole switch, the view 2| and 22 are anchored as by heading over being- taken along the- line 5_5 of Fig. 2, look their reduced ends 2Ia and 22a to a front metal ing in the direction of the arrows. plate 23 positioned within the cylindrical cham 55 Fig. 6 is a vertical sectional view taken along ber of the casing III, and detachably secured to 50 2,112,654 the back of the clock face II, as by means of a pair of screws 24. 'I‘he rear ends of the posts 2| and 22 are pro vided with reduced threaded extremities 25 car rying nuts 26 for detachable engagement with a rear circular plate 21. The rear plate 21 is pref erably made of three connected sheets of lam inated “bakelite” and is adapted to ñt into an annular groove 28 provided in the open rear end of the casing I0. It is to be noted from the above construction that the motor unit I8 will be slidable along vthe supporting posts 2| and 22, and said posts 2| and 22 with the front and rear plates 23 and 21 15 constitute a motor and switch supporting frame which may be inserted or removed as a unit from the casing whenever desired by merely removing the screws 24. 'I'he clock motor I8 is driven by a main coil 20 spring 29 connected at its inner end to a main shaft 30. The main shaft 30 is rotatably journal ed in the slidable motor plates I9 and |9a, and is provided with a reduced squared shank 3| which extends forwardly through a suitable aperture 32 25 provided in the clock face | I and adjacent metal A bushing 33 carrying an indicating . plate 23. pointer 34 is non-rotatively fitted upon the for ward end of the squared shank 3|. The indicating pointer 34 is located in front of 30 the dial face I I and is provided with a rectangular handle 35 preferably constructed of insulating material for facilitating the manipulation of said pointer and clock mechanism. The handle 35 is adapted to be held against the front surface of 35 the pointer by means of a fillister-head bushing screw 36 located in a socket 31 in said knob 35 and detachably engaging the reduced threaded end 38 of the squared shank 3|. In order to prevent the handle 35 from twisting 40 relative to the pointer 34, a pair of projecting studs 39 are made rigid to the front surface of ' the pointer and are adapted to iit'into alined sockets 40 provided in the adjacent surface of said handle 35. To successively close the switch mechanism 4| 45 and Wind the spring 29, it will be necessary to ñrst press the handle 35 inwardly tothe dotted line position shown in Fig. 2, and then to rotate said handle in a clockwise direction‘until the pointer reaches the desired time at which the switch 4| is to open. The power from the main spring 29 is delivered to the main shaft 38 through a fric tion slipping mechanism 42 in a well known man ner, which construction permits the turning of the indicating pointer 34 and the shaft 30 in either direction independently of the driving gear without injuring the motor unit I8. ' The pointer carrying bushing 33 in its assem bly upon the squared shank 3| is abutted against an intermediate sleeve bushing 43 loosely sur rounding said shank 3|, which in turn is abutted against the adjacent face of a cam disc 44 non rotatively mounted upon the squared ~shank 3|. ' 'I‘he cam 44 abuts against the shoulder formed 65 at the junction of the round main shaft 38 and the squared shank 3|. This construction causes the motor unit I8 to be moved upon the support ing posts 2| and 22 whenever the pointer knob 35 is- depressed. 70 ` In order to hold the clock movement _|8 in de pressed position, the cam disc 44 is provided with a radial rectangular recess 45 which is normally adapted to ñt about a stop block 46 secured to the rear face of the frontplate 23, as by an in tegral rivet 48. It will be obvious from this con struction that when the handle 35 is depressed, the cam 44 will be forced rearwardly with the shaft 38 to the dotted line position shown in Fig. 2. The locking recess 45 in the cam disc 44 will then clear thestop block 45, permitting the han dle 35 and pointer 34 to be rotated clockwise to any desired position. To lock the indicating pointer 34 and handle 35 in their initial or “zero” position, provision is made of a locking clip 49 located on the clock face ||, as best shown in Figs. 1 and 3. The clip 49 comprises an inverted U-shaped body member 50 having a pair of radial inner pointer-embracing lugs 5I and 52. The bottom legs of the locking clip 49 are provided with a pair of depending lugs 53 which llt into sockets 54 formed in the dial face | I, said lugs preventing the locking clip from twisting. The clip is held in position upon the dial plate || by a single screw 55. 'I'he right-hand pointer engaging lug 52 is cut 20 away at its bottom edge to allow the pointer 34 to pass it when the handle 35 is depressed. The left-hand lug 5I liesv in contact with the face of the dial and prevents the pointer 34 from being rotated in a counter-clockwise direction beyond 25 the zero point, and also prevents it from being ro tated more than one revolution in a clockwise di rection. Switch mechanism The switch mechanism 4|,‘previously referred to, is adapted to be actuated by a floating depres sor plate 56 of substantially thick insulating ma terial for making- and breaking the circuit through a pair of spaced “lead-in” angular con 35 nection terminal brackets 51 and 58, and a pair of “lead-out” connection terminal brackets 59 and 68 by means of a pair of movable curved spring contact strips 61| and 62 adapted to be en gaged by said floating plate 56. The “lead-in” terminals 51 and 56 are provided with upstand 40 ing lugs 51a and 58a having binding posts .63 and 63a screwed therein to make an electrical connec tion to a pair of conductors 64 and 65 of the “lead-in” cord I4, as shown in Fig. 5. - 'I'he spring contact strips 6| and 62 are pro 45 vided at their fixed ends with flattened extremi ties 68a which are adapted to lie in fiat contact with said “lead-in" terminals 51 and 58, said parts being held permanently on the inner face of the rear plate 21 by means of a pair of for wardly extending guide pins 66 having reduced rear shanks 61 provided with heads 68 seated in apertures formed within the laminated rear plate 21. The floating depressor plate 56 is preferably 55 provided with oppositely curved ends 69 and 69a having central recesses 18 adapted to slidably embrace the posts 2| and 22. 'I‘he upper end of the iìoating plate 56 is provided with a pair of side apertures 1| in which the guide pins 66 are slidably ñtted, and said insulating plate 56 is adapted to be normally pressed forward by means of a pair of yhelical compression springs 12 surrounding said pins 65. The lower end of the iioating plate 56 is also urged forwardly by the free ends -cof the spring contact strips 6| and 62. ‘ In order to loosely connect the floating plate 56 with the motor unit |8,'provision is made of a thrust block 13 preferably formed integral with the front face of said plate 56 in a central posi tion. 'I'he block 13 is provided with a counter sunk socket 14 for receiving the reduced end 15 oi' the main shaft 3l. This construction limits 754 2,112,654 the forward movement of the insulating fioating plate 56 which is normally held in equilibrium ì in the position shown in Fig. 2 under the in _lo fluence of the springs 12 and resilient spring contact strips 6I and 62. The lower extremities of each spring 6I and 62 are provided with contact buttons 16, pref erably of silver. and adapted to engage with similar stationary buttons 'I1 positioned on the adjacent surfaces of the "lead-out” terminals 59, 60. 'I'he fixed contact buttons _'I‘I are pro vided with reduced Shanks 'I'Ia (see Fig. 7), se cured by heads 'I‘Ib within apertures formed in the laminated back plate 21. 15 - 'The "lead-out” terminal brackets 59 and 6D are each formed with upstanding lugs 59a and 60a, mounted in which are a pair of threaded binding posts 'I8 and 18a for connection to a pair of conductors ‘I9 and 88 of the “lead-out” 20 -cord I5.. 'I'he “lead-in” terminal brackets 5l and 58 and the “lead-out” terminal brackets 59 and 60 are held against twisting by means of rivets 8|. . While the switch 4I is illustrated in Figs. i 25 to 7 as connected for a “double pole” switch, the construction of said switch is not limited to this connection, but may also be used as shown in Figs. 8, 9 and 10. In Fig. 8, by eliminating one of the switch blades 62 from the circuit, the 30 switch may be connected as a “single pole” switch. Fig. 9 shows the switch connected as a “double single pole” switch, whereby two power consuming devices may be simultaneously oper ated by the same time clock. Fig. l0 shows the 35 switch connected as a "double-break single pole” switch, in which iorm‘the arcing of the switch is materially reduced. \ Operation 40 In operation, the timer switch will ñrst be ín cluded in an electrical circuit, such as shown in Fig. l, after which the indicating pointer 38 and the handle 35 will be manually depressed suffi ciently to clear the lug 52 of the locking clip 49. The handle and pointer will then be rotated 45 in a clockwise direction to the desired time in terval indication, at the lapse of which the cir-= cuit is to be opened. It is to be understood that the device may° be set to operate for any interval of time from a 50 fraction of a minute up to the maximum range of the clock mechanism. During the operation described above, the cam disc 44 will be unlocked from the stop block '46, and the spring 29 will be wound to furnish power 55. for driving the clockmovement and returning the pointer 34 and handle 35 to their initial positions. The camdisc 44 will remain in the closed circuit position shown in Fig. 4 until the pointer has reached “zero”, at which time the 60 slot 45 on said cam disc will come into alinement with the stop block 46, and permit theswitch to be restored by spring action to open circuit position. ' ' . It is to be noted at this point that the con struction of Athe switch mechanism 4I and the controlling cam M is such that the space included between the contact buttons 'I6 and 'I'I in their normal separated position is somewhat less than the height ofthe stop-block 46. Consequently, in pushing in on the handle 35, the buttons 'I6 and 'I1 are contacted to close the circuit before the cam disc.“ has cleared the stop-block 46, ‘ and further movement inwardly of the knob 35 75 is necessary to unlock the cam M from said - 3 block 46 so as to permit turning of the same. During this further movement inwardly, the up per end plate 56 will be tilted out of its normal vertical position, as shown in Figs. 2 and 6, to assume an inclined position as indicated by dotted lines in Fig.' 6. One advantage of the present invention is that minor variations in size of the several coacting parts due to manufacture or wear will be com pensated ‘for without affecting the working qual ities in any way. Fig. 11 shows a modiiied form of construction wherein the motor unit I8 is held in a ñxed position, and the main shaft 82 may be moved laterally independently of said unit I8. The mo tor unit I8 is mounted upon a tubular arbor 83 within which the main shaft 82 is slidably ñtted. The motor plates I9 and I 9a are supported upon posts 84 secured to the front and rear plates 23 and 2l similar to the posts ZI and 22 in the ñrst 20 form. The post 84, however, has a reduced see~ tion 85 upon which the motor plate I9 is held in assembled position, as by means of a pair of spacing sleeves 86. In order to connect the stationary motor it with the axially movable shaft 82, said shaft 82 is provided with an intermediate projecting transverse pin 8l', which is adapted to slidably engage in a pair of opposed elongated slots ¿it in the tubular arbor 83. Otherwise, the construc tion of the modiñed form i-s identical with the first form of the invention. While there have been disclosed in this speci fìcation two forms in which the invention may be embodied, it is to be understood that these :forms are shown for the purpose of illustration only, and that the invention is not to be limited to the speciñc disclosures but may be modiñed and embodied in various other forms without departing from its spirit. In short, the inven 40 tion includes all the modifications and embodi~ ments coming within the scope of the following claims. Having thus fully described the invention, what is claimed as new, and for which it is de 45 sired to secure Letters Patent, is: l. In an electric time-controlled switch, a frame, a floating longitudinally movable self contained spring motor clock movement mount~ ed in said frame, a shaft to which said clock movement is rigidly secured for axial movement therewith, but being rotatable relatively thereto, driven by said movement and projecting out of said frame, a setting handle and pointer on said shaft, an electric switch located in said frame, 55 means connected to said shaft for closing said switch when said handle shaft and movement are axially depressed, and means to hold said shaft in depressed position and said switch closed dur ing the operation of said clock movement. 2. In an electric time-controlled switch, a frame, a self-contained clock movement slid ably and longitudinally mounted in said frame, a shaft movable longitudinally with said move ment but rotatable with respect thereto and 65 carrying a setting handle and an indicator, a switch mounted in said frame, switch closing means responsive to the manual movement of said handle and movable with said shaft, and means for holding said .shaft in closed circuit 70 position for maintaining said switch closed dur ing the loperation of said clock movement; 3'. In an electric time-controlled switch, a frame, a self-contained clock movement movably mounted to slide longitudinally in said frame, a 75 4 2,112,654 shaft movable longitudinally with said move ment but rotatable with respect thereto and carrying a setting handle, a switch mounted in said frame, switch closing means responsive to the manual movement of said handle and mov able with said clock movement. in said frame and having a main shaft, a handle and pointer carried on the forward end of said shaft in front of said dial face, a switch mecha nism adapted to be operated with the sliding of said clock movement, means for holding said G1 clock movement in switch closing position dur 4. In an electric time switch, a base having a ing the predetermined period of time for which projecting stud, a spring metal strip having one end mounted on said stud, said strip having a said clock movement is set, said means compris ing a raised block mounted on said frame, and movable contact on its free end, a fixed contact a cooperating cam member carried by said shaft in alinement with said- movable contact, an insu and having a notch for engagement with said block for holding said movement in inactive posi lating tilting plate engaging said strip and hav ing an aperture guided by said stud, a spring surrounding said stud and pressing against said plate whereby said plate may be tilted beyond circuit closing position. tion. l1. In an electric time switch, a frame, a self contained clock movement slidable longitudinally as a unit in said frame, a stationary contact 5. In an ,electric time switch, a frame, a self contained clock movement longitudinally slid able in said frame, a stationary switch contact button, a spring strip fixed at one end to said frame and having a mova-ble contact button on carried by said frame, a movable contact actu ated by the sliding of said clock movement, and a depressor plate spring-pressed toward said clock movement and being located between said clock movement andsaid movable contact for 25 opening and closing the circuit through the switch coincident with the sliding of said clock plate spring-pressed toward said clock move ment and being interposed between said slidable clock movement and said spring strip for bring movement. the free end thereof, and a floating depressor ing said movable contact into engagement with said stationary contact when said clock move ment is moved longitudinally as a unit. » - ' contained clock movement movable longitudi y 6. In a time switch, a slidable clock movement, a stationary contact, a movable contact, and a 80 floating plate located between said clock move ment and said movable contact and actuated by the sliding of said clock movement for open ing and closing said switch, spring means for pressing both ends of said plate toward said clock movement, said plate being adapted to tilt around said fixed contact as an axis after the switch has been closed to _compensate for minor variations in size of the working parts. 7. In an electric time switch, a clock frame 40 having a pair of rods extending from the iront and rear thereof, a self-contained clock move vment mounted to slide longitudinally upon said rods and having a main shaft provided with a handle and an indicator outside the clock dial, 45 means initially in the path of said indicator to prevent rotation thereof until said handle and indicator are depressed, and a switch member carried by said clock movement adapted to close the circuit through a power consuming device when said handle and indicator are depressed. 8. In an electric time switch, a clock casing, a self-contained clock movement mounted to slide nally as a unit in said frame, an electric switch comprising a pair of fixed contacts, a pair’ of spring strips having movable contacts and nor 30' mally out of contact with said ñxed contacts, and a switch closing member engageable by said clock movement for pressing said movable con tacts against said fixed contacts. 13. In an electric time switch, a frame, a spring 55 motor clock movement slidably mounted Ito move longitudinally in said frame, an electric switch comprising a stationary contact and a movable contact, a depressor plate spring-pressed toward said clock movement and being interposed be 40 tween said clock movement and said movable contact for forcing’the latter against saidlsta tionary contact when said clock movement is moved. 14. In an electric time-controlled switch, a 45 base, a timer, means for setting said timer, a fixed contact on said base, a spring strip secured at one end tc said base at a distance from said fixed contact, said spring strip having a movable contact on its free end in alinement with said 50 fixed contact, a tiltable plate for flexing said strip to bring said movable contact into engage longitudinally in said casing and having a main ment with said iixed contact, and a spring en shaft, a handle and indicating means on the gaging the base of said strip and pressing upon said tiltable plate to permit said plate to tilt 55 forward end of said shaft associated with the dial of said clock, means initially-in the path of said indicating means to prevent rotation there of until said handle and indicating means are depressed, a switch, and‘means responsive to the sliding motion of said clock movement as a unit operated means to hold said tiltable plate rear wardly, and means operated by said timer to release said holding means to permit said tilt for closing said switch. position. ' 9. In an. electric time switch, a clock frame having a dial face, a self-contained clock move ment mounted for sliding movement longitudi nally in said frame and having a main shaft to which said clock movement is rigidly secured for axial movement therewith. but being rotatable relatively thereto, a switch mechanism located in said frame and responsive to the sliding of said 70 clock movement, and means for holding said clock movement in circuit closing position dur ing the predetermined period of time forwhich it is set. v - 25 12. In an electric time switch, a frame, a self ` ' ld10. In an electric time switch, a frame having a dial face, a clock movement mounted to slide beyond the circuit closing position, manually able plate to move forwardly to openV circuit ' 15. In an electric .time-controlled switch, a casing, a self-contained spring motor longitudi nally slidable in said casing as a unit, said‘unit including a main shaft to which said sprirg motor is rigidly secured against axial movement relatively thereto but being rotatable relatively thereto, an electric switch, means operated by the sliding of said shaft axially with said motor 70 and the turning of said shaft to close said switch, means for locking‘said motor in switch closing position, and means responsive to the running of said motor and operated bythe rotation of said shaft for unlocking said timing circuit and open ing said switch at the expiration of a prede termined time interval. 16. In an electric time-controlled switch, a cas ing, a spring motor longitudinally slidable in said thereto but being ‘rotatable relatively thereto, .spring means for resisting the sliding oi said movement, means to wind said clock movement and set it for a desired time interval, means casing as a unit, said unit' including a main actuated by the sliding of said movement and shaft to which said spring motor is rigidly seu the turning of said shaft to start the operation cured against axial movement relatively thereto `of said device, means to hold said movement in but being rotatable relatively thereto, an electric position to maintain said device in operation, switch, said switch including movable and ñxed and means responsive to the running down of contacts and spring means for pressing said said clock movement and the rotation of said movable contact toward open circuit position, shaft for releasing said movement at the ex 10 means operated by the sliding of said shaft axi piration of the desired interval of time for per ally with said motor and the turning of said mitting said spring means to return said move shaft to close said switch, means for locking ment to its initial position. said motor in switch closing position, and means 18. In a timerfor controlling an operatable responsive to the running of said motor and the rotation of said shaft for unlocking said motor and opening said switch at the expiration of a predetermined time interval. 17. In a timer for controlling an operatable device, a casing, a clock movement longitudinally l slidable in said casing as a unit, said unit includ ing a main shaft to which said spring motor is rigidly secured against axial movement relatively device, a casing, a self-contained time-responsive unit longitudinally slidable in said casing and including a main shaft, means actuated by the sliding of said unit and the turning of said main shaft to start Athe operation of said device, and 20 means responsive to the running of said time responsive unit for stopping the operation of said device. FREDERICK LUX.