US1294540A - Time-switch for electric lights. - Google Patents

Description

E w. T. HOWELL. V TIME SWITCH EUR ELECTRIC LIGHTS.

Y APPLlcITloN HLED MAY:1,|918. 1,294,540. Patented Feb. 18, 1919.

. 4 a SHEETS-5115511.

` w. T. RowLL. TIME SWITCH FOR ELECTRIC LIGHTS.

l APPLICATION FILED MAY I1. 191s. 1,294,540.

72de?? for.'

l w. T. RowELL. TIME swncH FOR ELEcImc LIGHTS.

APPLICATION FILED MAY 1l, 1918. A

' Patented Feb. 18, 1919.

3 sHEETs-sHEEr a:

UNTED 'STATES PA'rN or CE.

WALDEN T. BOWELL,

OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO C. 1?. HARRIGAN, 0F CHICAGO, ILLINOIS.

TIME-SWITCH FORl ELECTRIC LIGHTS.

Specification of Letters Patent.

Patented Feb. 18, 1919.

Application filed May 11, 1918. Serial No. 233,943,

vthe principle set forth in Patent No. 1,194,-

O78, issuedtome August 8, 1916.

The object of the present invention is to -so construct and arrange the mechanism for performing the several operations in question' that it will be neat and compact in form, certain of its operation, and conformable in certain of its features to standard constructions employed inthe clock making art. The invention is designed for use in connection with an electriclighting switch of the pull variety which requires a pull and release of the chain or cord' to move the switcheither to the on yor off position. The invention is directed to the meansprovided vfor certainly maintaining the clock mechanism in Wound position by connecting the winding arbor with the switch mechanism in such away that theV arbor will be moved with the setting mechanism whenever the sp1-ing shall haveunwound to a predetermined degree, thereby insuring a proper winding of the mechanism with each setting of the switch irrespective of the time period for which the switch is adjusted. A

4The invention is primarily intended for use in apartment buildings, stores, or display windows, where it is desired to maintain the lights for a predetermined time without the supervision of an attendant, and

to automatically and certainly extinguish the lights after a lapse of time.

A further object of the invention is to provide means independent of the automatic means for lighting or switching off the lights as occasionmay require; to provide means for insuring a starting of the clock mechanism after the mechanism has been set, land to improve the general construction, arrangement, and mounting of the device as a whole, so that it may be housed within a comparatively small compass and located in the basement, switch box, or othervinconspicuous place.

In the drawings: Y

Figure 1 is a side elevation of the entire device showing the same in the set or on position, and showing the details of the tripping mechanism;

F 1g. 2 is a similar View in the same position showing the mechanism in released pos1t1on;

Fig. 3 is a view of the opposite side of the mechanism showing the Winding features;

.Fig l is an end elevation skeletonized by 'the removal of the clock train; and

'Fig 5 is an inside View of the side plate which supports the tripping mechanism.

The mechanism as a Whole" is mounted upon and carried by a bracket 6 secured to a wall 7 or other convenient support, which bracket supports a base plate 8 'to which is secured anvupstanding side plate` 9 which affords connection for the tripping mechanism presently to be described. The base plate also serves asa support for a pull switch 10 of the well known variety in common use at the present time of the general type shown in the Hubbell Patent No. 649,308, which switch controls an electric circuit through the wires 11 leading to `one or more incandescent lights 12 which may obviously be arranged and located in such suitable and convenient positions as. the lighting system for the building may requ1re.

The pull switch is operated by means of la chain or cord 13, which, asbest shown in Fig. 5, connects withthe upper arm 14 of a bell crank lever, the lower arm 15 of which carries an outwardly extending pin 16 which passes through a vertically elongated slot 17 near the lower outer corner of the side plate 9. ,The bell crank 14 is mounted upon, a pivot stud 18 inwardly extending from the side .plate at a point without interference 'from the automatic mechanism.

The pin 16 coperates with an elongated 'slide plate 2() which is provided with two elongated slots 2l and 22 respectively,

through which are entered guide pins 23 and 24 respectively, the arrangement being one which affords to the slide plate a straight line movement across the outer face of the plate 9. The slide plate is provided on its under edge near its outer end with a cam projection 25 which bears upon the underlying pin 16, so that, as the slide plate is drawn back from the set position shown in Fig. 1 to the ti'ipped position shown vin Fig. 2, it will cause the pin 16 to be forced down and then released as' the medial or apex point ofthe cam projection passes the pin, with the result that the bell crank lever will be rocked forward and then released, thereby imparting a'corresponding pull and release to the switch chain 13. The retraction of the slide plate is effected by the pull of a pair of coil springs 26, the forward ends of which are hooked through a flange 27 at the outer end of the slide r plate, and the rear ends of which are hooked yplained.

through a flange 28 formed on an upstanding ar'm 29 which is secured to the edge of the base plate near the' rear'side thereof.

'The center or unslotted portion of the slide plate is provided with an upstanding projection 30, which carries a pin 31 which is entered through an elongated slot 32 in a 'latch lever 33 rigidly secured to the outer end of a setting shaft 34, which latter is journaled through the side plate 9 and eX tends beneath the clock train and through a pair of supporting lugs which project upwardly from the base plate 8, as shown.

in Fig. 4. The opposite end of the shaft carries a rigidly mounted linger 3G which` affords the means whereby the shaft is turned concurrently with the winding of the mechanism by. m eans to be presently eX- A coil spring 38 encircles a boss 39 on the end of the setting shaft 34` the inturned end 37 of the spring engaging the heel 40 of a main loperating lever 41 which is loosely mounted on the setting shaft 34, the arrangen'lent being one whereby the lever will return freely, under spring tension, upon its release, without moving the shaft 34. llVhen the lever is engaged with the shaft, a continued movement of the lever will cause a turning movement of the setting shaft through an angle of about forty five degrees. This rocking of the shaft will be sufficient to move the latch lever 33 from the released vertical position shown in Fig. 2 into the latched position shown in Fig. 1. ln the latter position, the tip end 42 of the latch lever will ride under `the outer end of a trip lever 43 loosely mounted upon a pivot stud 44, which carries a coil spring 45 bear- Ahel'd by spring tension into contact with an adjustable stop pin 51 which may be positioned Within any one of a series of radially arranged stop `holes 52 spaced in proper re` lation to represent hours of time in the movement of the clock mechanism.

The disk 49 is rotatably mounted on a pivot stud 53 carried by a vertically disposed slide plate 54 which abuts against the inner face of the side plate 9. Theslide plate is provided with a guide slot 55 which embraces the hour hand arbor 5G of theI clock mechanism and is provided at its lower end with an incut slot 59 which embraces a guide )in 58, the arrangement being one which a ords to the slide plate a slight degree of vertical movement which is vrequired for the purpose of entrainingv the adjusting finger 5() with the hour hand pinion of the clock mechanism in a manner to be lnow described.

The lower end of the slide plate 54 bears against the' upper surface of the setting shaft 34 which, at the point of contact on one of its sides, is flattened as at 60, so that, as the setting shaft is r cked in the operation of the latch lever, t 1e flattened side G0 of the setting shaft will be brought into register with the lower end of the slide plate 54, allowing the latter to drop down sufiiciently to entrain the spur pinion 61 with the hour pinion 62 on the end of the hour arbor 5G. The spur pinion 61 lies in facial contact with and issecured to the disk 49 which carries the adjusting arm 50, so that these parts,.wl1en in train, will have move- `ment commensurate with the hour hand movement of the clock, whereby, during the f lapse of one hour, the adjusting arm 53 y110 will have a counter-clockwise movemen 'f away from the adjusting pin 51 commensurate with one hour in the timed relation of the parts.

The disk 49, immediately adjacent to the adjusting finger 50, is provided with a notch which operates through the medium of the pin 31 on the slotted slide bar 2Q. This movement of the slide bar causes the apex of the cam 25 to ride over the pin 16 forcing down the latter and moving and releasing the bell crank lever 14 with a corresponding pull and release of the switch chain 13.

For purposes of convenience, the spaced relation between the normal or release point and the first adjusting hole 52 of the series represents a period of an hour anda half, and every space thereafter represents an additional hour, so that, if the stop pin 51 is set in the first position, it will require an hour and a half for the adjusting finger 50 to return to normal or releasing position, and an additional hour for each sequential setting of thestop pin. It will be understood'that the arm 50 with the disk 49 and the pinionv 61 are under constant spring ten sion which tends to move these 4parts in a clockwise direction, so that, until the parts are in train with the hour pinion and the return movement is begun, the adjusting arm 50 will lie in spring contact against the stop pin 51 irrespective ofthe position occupied by the latter; and this contacting of the arm and'stop will automaticallytake place every .time the parts are released and the light is switched oft'. In this way the parts will be maintained in position to move through a predetermined period as soon as the entraining is again effected by the latching of the latch lever in the operation of switching on lthe lights.

In order to lift the finger 47 out of the notch 63 after the adjusting finger 50 has yreturned to the X-position, the latch lever,

33 is provided near its tip end with an inl turned flange 64, as best shown in Fig. 4,

which, when the parts are returned to released position, will ride under the inner end of the trip lever 46 and raise the same sufficiently to lift the finger 47 above the level of the notch, thereby releasing the disk 48 and adjusting finger 50, and allowing the latter to fly down until it contacts with the stop pin 51 which regulates the time for its return movement.

The clock mechanism is carried within a frame consisting of inner and outer side plates 65 and 66 which are held in spaced relation by spacer pins 67 passing through the corners; and the clockwork carries the usual train of gear arbors of which onlv ie spring 68 is mounted upon a spring shaft 69 which 'likewise carries a pinion 70 1n' mesh with a` segmental rack 71 looselv mounted on the setting shaft 34. The segment is provided to wind up the spring b v the action of the lever 41 whenever it happens that the spring has unwound to a delgree which makes the winding necessary. The movement of the lever 41 is imparted to the segment 71 through the medium of a lever arm 72 which is connected with the 74;L to provide at its upper end a notched v head 75 which, with the parts shown in the adjustment indicated in Fig. 3, lies inproper relation to engage a stud 76 on the segment 71, so that, with the parts in this' relation.

when the lever 41 is pulled forward. the segment will be moved withv the lever and act to wind up the spring during the operation of setting the trip mechanism; and with the notched head of the pawl thus engaged the corner 74b of the pawl will lie in the plane of the finger 36 so that a continued forward movement. will bring the corner 7 4*" into contact with the linger, and a movement of the lever will both wind the spring and set the latch. The pawl is subject to the action of a fiat spring 77 which tends to throW the notched member upward when the foot 74 is released from contact with the plate 8, so that unless the notched member is in engagement with the stud 7 6 at the beginning of the lever stroke the pawl will be thrown back by the action of the fiat spring 77. allowing the notched end to clear the stud l76 and later the finger 36. This Aallows the lever 41 to swing forward idly without imparting anv movement to the operating mechanism. In this wav the mechanism can be wound and set only when the segment 71, being in train with the spring arbor, has, after a calculated period of time, returned to the position shown in Fig. 3, which illustrates a position indicating a nearly complete unwinding of the spring mechanlsm, that is, a position in which a rewinding of the mechanism will be necessary to insure a further operation of the device for any'considerable period of time.

In view of the fact that the clock mechanism is held in stationary position, so that it is impossible to shake or jar the mechanism after winding. to insure a starting of the mechanism after it is woundup, the following devices are'provided: The side framev 66 of the clock mechanism has pivoted thereto an arm 78 which carries an inwardly projecting coil spring linger 79 so disposed that when the arm is rocked rearwardly, the spring finger will frictionally engagmwith the rim ofthe escapement wheel 80 of the clock mechanism and turn thev same backward against the tension of the hair spring 81. This rocking movement is effected through the contact of a stop pin 82 shown in dotted lines in Fig. 3, which projects inwardly from the inner face of the segment 71 and in position to engage a spring detent 83, which is pivoted concentrically with the lever arm 78 and bears against al stop 84 on the lower end of the lever arm 78. so that a forward movement of the spring detent will cause a rearward rocking of the lever arm as the stop pin 82 engages the detent. On

` the return movementof the pinl 82, it will lift the spring detent without imparting movement to the lever arm.

' By means of this arrangement, as the segment is advanced during the winding operation, the escapement wheel will be put under spring tension until the stop pin 82 has moved to a point where it will release the detent, at which time the coil spring 85 will act to suddenly return the lever arm to normal position, thereby imparting a sudden rotative movement' to the escapevment wheel which serves to set the clock train in motion.

The various operations will be generally understood from the foregoing descriptlon, but the same may be briefly summarized as follows: With the lights extinguished, the

adjusting stop pin 51 will be set into a hole corresponding to the periods of time during which it is desired to maintain the lights in the building. The main operating lever 41 will then be pulled forward and through engagement with the notched head of the pawl 7 3 with the pin 76 on the winding segment will impart a winding movement of the spring arbor, which movement simulta-` neously results in an initiatory movement of the escapelnent wheel. After the parts thus engaged have been slightly moved, the pawl will come into contact with the finger 36, and a continued forward movement thereafter will impart a partial rotation to the setting shaft 34. This rotative movement of the shaft will bring the fiat side thereof beneath the lower end of the slide plate 54, which will allow the latter to drop and entrain the pinion 61 with the hour pinion of the clockl mechanism, so that the anti-clock-A wise movement of the adjusting finger will begln.

Rotation of the setting shaft will also simultaneously rock back the latch lever 33 latch will be tripped, and the springs 26 will throw back the slide plate, and thereby actuate the pin 16 to turn off the switch and extinguish the lights.

The mechanism is one which conforms perfectly to the standard requirements of the clock-makers art, and permits the special mechanism described to be employed in association with clock-work of the usual design and without any modifications whatever inthe structure of the clock mechanism. The device is certain in its operation, in that it eliminates the necessity for attending to the winding mechanism, so that no difficulty will be experienced by reason ofthe fact that the clock is insufficiently wound to operate during the entire period for which the trip mechanism is adjusted.

` The winding and setting movements both being dependent upon the engagement of the pawl with the segment, it necessarily follows that it will be impossible to 'setthe trip mechanism until the motor mechanism has unwound to the degree necessary to secure this engagement. Thus. after the lights are extinguished for the night at the selected hour, the mechanism will of necessity run idly fora predetermined period of time so that it will be impossible to switch on the light, save by the secondary or non-automatic hand mechanism, until the proper hour has arrived for the turning on of the lights in the evening. This will prevent the janitor or attendant from shirkinghis duty by Aturning on the lights at an earlier hour than the one for which the adjustment is made, since the mechanism can be located in a locked housing -which will prevent tampering with the adjustments. At the same time the arrangement is one which insures a complete winding of the spring motor'with leach settingsof the trip mechanism, so that ample power will always be stored up for maintaining the operation during the longest period of time for which the lights may be kept burning. It will thus be seen that not only does the mechanism provide suitable means for determining the period of illumination, but also provides adequate means for timing the illumination to begin only at a predetermined hour. which is important in the practical operation of ka device of this character.

Although in the normal and usual operation of the device, the lights will be turned on by the pull of the hand lever` and turned off by the trip ymechanism. nevertheless, these on and off movements can be reversed by a pull and release of the secondary switch chain, so that the liglitswill be automatically turned on when the mechanism is tripped, andcan afterward be extinguished by a `second pull -ot the secondary switch.y

chain. This adjustment will be of advantage in cases where the owner 'of a home may wish to leave the house vacant during the evening, with the assurance that the lights will be automatically turned on at a given hour to guard against intrusion before the return of the owner. In the claims, therefore, where reference is made to the turn# ing on and oii' of the several mechanisms, it will be understood that this language is intended as well to cover a reversal of these operations.

I claim:

l. In a time controlled switch mechanism, the combination'of a switch, mechanism for moving ythe switch to on and off positions, hand-operated means for actuating the switch moving mechanism to turn on the switch,'trip elements adapted to be set by the movement of the hand-operated means,y

one of the trip elements being'in operative relation with the switch moving mechanism, time controlled means for releasing the trip elements after a predetermined lapse of time, the release of said trip elements resulting in a turning oifmovement of theswitch moving mechanism, a lspring motor, and connections between 'the hand-operated means and the spring motory adapted to engage only when the motor is unwound to a predetermined extent for winding the motor with the'settin movement of the hand-operated means, su lstantially as described.

2., In a time cont-rolled switch mechanism,

the combination of a switch, mechanism for moving the switch to on and oit positions, hand-operated means 'for actuating. the switch moving 'mechanism lto turn on the switch, trip elements adapted to be set by the movement of the hand-operated means,

' one of the trip elements being in operative motor, a segment in train with the spring relation withthe switch moving mechanism, timeA controlled .means for releasing the trip elements after a predetermined lapse of time, the release of said trip elements resulting in a turning off movement of the switch -movmg mechanism, a spring motor, and connections between the handoperated means and the segment adaptedk to engage only when the motor is unwound to a predetermined extent for winding the motor with the setting movement of .the hand-operated means, substantially as described.

3. In a time controlled switch mechanism,l

the combination of a switch, mechanism for moving the switch to on and off posltions,

hand-operated means for4 actuating the4 switch moving mechanismto turn on the switch, 'trip elements adapted to be setby one ofthe trip elements beinglin operative the movement of the `hand-operated means,

'relation with the'switch moving mechanism,

time controlled means for releasing the' trip elements after a predetermined lapse of time, the release of said trip elements resulting in a turning ofi' movement of the switch moving mechanism, a spring motor, a segment in train with the spring motor, a pawlconnect ed and movable with the hand-operated ymeans, and a stop for holding the pawl in position to' engage the Segment only when the spring is unwound to a predetermined extent, the pawl maintaining engagement with the hand-operated means for winding -the vmotor during the setting movement of the hand-operated means, substantially as described. i

4. In atime controlled switch mechanism, the 'combination of a switch, mechanism for moving the switch to on and off positions, hand-operated means for actuating the switch moving mechanism to turn on the switch, trip elements vadapted to be set by the movement of the hand-operated means,

one of the trip elements being in operative relation with the switch moving mechanism, ltime controlled means for releasing the trip the release of Said trip elementsresulting in a turning off movement of the switch moving mechanism, a spring motor, connections between the hand-'operated means and 'the Spring motor for winding the motor with the setting movement of`the hand-operated means, and a member movable withsaid connections for imparting a starting movement to the spring motor coincidentlyl with the winding thereof, substantially 'as described.

, 5. Ina time controlled switch mechanism,

. elements after a predetermined lapse of time,

elements after a predetermined lapse of time, 1

the release of said trip elements resulting in a turning oit' movement of the switch moving mechanism, a spring motor, a segment in train with the spring motor, connections between the hand-'operated meansl and the segment for winding the motor with the setting movement of the hand-operated means. and

a member moved by said segment and adapt-` ed to impart a starting movement tothe. motor coincidently with the winding thereof, substantially as described.

6. In a time controlled switch mechanism,- the combination of a switch, mechanism for.

moving the switch to on andoi positions, hand-operated means for-I actuating the switch moving mechanism to turn on the switch, trip elements-adapted to be set by the necesa@ movement of the hand-operated means, one of the trip elements being in operative relation with the switch moving mechanism, time controlled means for releasing the vtrip elements after a predetermined lapse of time, the release of said trip elements resulting in a turning o movement of 'the switch moving Amechanism, a spring motor, a segment in train with the spring motor, connections between the hand-operated means and the segment. for winding the motor with the settinrr movement of the hand-'operated means, and a spring finger moved by said segment adapted to impart a starting movement to the motor coincidently with' the winding thereof, substantially as described.

7. In a time controlled switch mechanism, the combination of a switch, a draw connection `for operating Ithe switchto on and off position by a pull and release movement for each switch operation, av pivotally mounted lever to one arm of which said draw connection is attached, a cam element acting upon the other arm of the lever for moving and releasing said arm with each` passage off the cam element, hand-operated means for mo"- ing the cam element in one direction to turn on the switch, a latch moving with the setting movement of the hand-operated means, a tripping device for holdingthe latch and cam element against return movement, a spring motor'. and time controlled means adapted to entrain with the spring motor for throwing the trip to release the latch after a Lpredetermined period of time, substantially as described.

8. In a time controlled switch mechanism, the combination of a switch, a draw connection for operating the switch to on and ofi position by a pull and release movement for each su itch operation, a pivotally mounted lever to one arm of which said draw connection is attached, a cam element acting upon the other arm of the lever for moving and releasing said arm with each passage of the cam element, hand-operated means for moving the cam element in one direction to turn on the switch, 'a latch movable with the setting movement of the hand-operated means, a tripping device for'holding the latch and cam element against 'return movement, a spring motor, time controlled means adapted to entrain with the spring motor for throwing the trip to release the latch after a predetermined period of time, and means movable with the hand-operated means for entraining the time controlled means with the spring motor during the setting of the latch mechanism, substantially as described.

9. In a time controlled switch mechanism,

the combination of a switch, a draw connection for. operating the switch-to on and off position by a pull andrelease movement for each switch operation, a plvotally mounted lever to one arm of which said draw connection is attached, a cam element actingupon the other arm of the lever for moving and releasing said arm with each passage ofthe cam element, hand-operated means for moving the cam element in one direction to turn 7U on the switch, a latch movable with the set! ting movement of the hand-operated means, a tripping device for holding the latch and cam element against return movement, a

spring motor, time controlled means adapted to entrain with the spring motor for throw- 'ing the trip to release the latch after a predetermined period of time, and means movable with'the hand-operated means for entraining the time controlled means with the spring motor during the setting of the latch mechanism and adapted to disentrain the parts with the releasing of the latch mechanism, substantially as described.

10. In a time controlled switch mechanism,

the combination of a switch, a draw connection for the switch adapted to operate the. switch to on and ott positions by a pull and release movement for each switch operation,

hand-operated means for turning the switch to on position, a. spring motor, time controlled tripping mechanism adapted to entrain with the spring motor and effect a turning 0H of the switch after a predetermined period of time. and secondary hand-controlled means for operating the switch independently of the operation of the time controlled mechanism, substantially as described.

l1. In a time controlled 'switch mechanism, the combination of a switch, a draw 100 means for moving said lever to turn the switch to on position, a spring motor, time controlled means adapted to entrain with thespring motor for e'ecting a movement of the lever to turn the switch to off position after a predetermined period of time, and

secondary means connected with the lever for operating the same independently of the operation of the time-controlled mea-ns, substantially as described. l

12. In a time controlled switch mecha-i nism, the combination of a switch.l a draw connection for turning the switch to on and off positions b v a pull and release movement for each switch operation, a lever connected with said draw connection, a setting shaft, i

hand-operated means for turningthe setting shaft, a latch member carried the setting shaft, a cam element having operative connection with the'latch member and movable conformably therewith, the cam element acting to impart a pull and return stroke to the lever with the setting movement of the setting shaft, a spring for returning the cam element to retracted position, a trip for holding the latch in set position, a spring motor, and connections between the sprmg motor and trip member for operating the trip to release the latch after a predetermined period of time and permit a return movement of the camand an operating movement of the lever controlling the switch, substantially as described.

13. In a time controlled switch mechanism, the combination of a switch, a draw connection for turning the switch to on and ofl' positions by a pull and release movement for each switch operation, a lever connected with said draw connection, a setting shaft, hand-operated means for partially rotating the shaft, a latch member carried by the shaft, a slide plate havingoperative connec-v tion with the latch member, a cam on the Y slide plate, an operative connection between the cam and the draw lever for imparting a4 lwhen the latch is released, a trip for holdingV j the latch in set position, a spring motor, and

v time controlled means for actuating the tripping mechanism to release -the latch after a predetermined period of time, substantiallyv as described.

14. In a time controlled switch mechanism, the combination of a switch, a draw connection for turning the Yswitch to on and off positions by a pull and release movement for each switch operation, a lever connected with said draw connection, a setting shaft, hand-operated means for partially rotating the shaft, a latch member carried by the shaft, a slide plate having operative connection with the latch member, a cam' on the ing the draw bar to normal position when the latch is released, a trip for holding the latch in set pesit-ion, a spring motor, an adjusting linger, the adjusting finger and trip being correlated to move the trip to releasing position after the return movement of the adjusting linger has been completed, and an element connected with the adjusting finger and adapted to entrain with the spring motor for timing the return movement of the adjusting finger, substantially as described.

15. In a time controlled switch mechanism, the combination of a switch, a draw connection for turning the switch to on and off positions by a pull and release movement for each switchy operation, 'a lever connected with said draw connection, a setting shaft', hand-operated means for partially rotating the shaft, a latch member carried. by the shaft. a slide plate having operative connection with the latch member, a cam on the slide plate, an operative connection between the cani -and the draw lever for imparting a pull and release movement tothe latter with each passage of the cam, a spring for returning the draw bar to normal position when the latch is released, a trip for hold.- ing 'the latch in set position, a spring motor, a adjusting finger, the adjusting finger and trip being correlated to move the trip to releasing position after the return movement of the adjusting finger has been completed, an element connected with the adjusting finger and adapted to entrain with the springmotor for timing the return movement of the adjusting finger, and means operable by the movement Y, of, the hand-operated means for throwing the parts in train coincidently with the setting of the latch, substantially as described. 16.In a'vtime-controlled switch mechanism, the combination of a switch, a connection Vfor turning the switch to on and off pbsition's, a spring motor provided with windijlgmechanism, hand operated means 1 adapted to engage with the winding mechja'nism only when the spring motor is unwou'nwd to a predetermined extent, time-controlledtripping mechanism jadapted to entrain with the spring motor and effect a turning olf of the switch after a prede-l Ftermin-ed period oftime, and connections between the hand operating means and the tripping mechanismadapted to engage only when the hand operated means are in engagement with the winding mechanism for setting the tripping mechanism concurrently A.with the winding of the spring motor, substantially as described.

17. In a time-controlled switch mechanism, the combination ,of a switch, means for moving the switch to on and oli' positions, a spring motor, gearing in train with the spring motor for winding the same, a hand operated lever provided with a contact device for engaging the winding gearing only when the spring motor is unwound to a predetermined eXtent, tripping mechanism adapted to entrain with the spring motor for turning oli" the switch after a prede;

to one of the winding gearfelements, a pawl carried by the hand lever, n stop on the last mentioned gear element adapted to enftageI the pnwl only when the Spring motor is unwound to :L predetermined extent, tripping elements adapted to entrain with the spring motor :1nd elleet a Jfmning olf of the switch after a predetermined period of time, and

means for setting the trip elements adapted to be operatiyely engaged by the pawl only when the latter is in operative engagement with the last mentioned winding gear element for concurrently winding and setting the mechanism by operation of the hand lever, substantially ,as described.

WALDEN T. ROVVELL.

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