US1484277A - Electric automatic door-locking system - Google Patents

Description

Feb. 19;, 1924. 1,484,277

J. o. SCHAKEL ET. A l... ELECTRIC AUTOMATIC noon Locxme SYSTEM Filed Jan. 5, 1922 4 Sheets-Sheet 1 11 lllllflII/rll/J 711111111, I

Feb. 19 1924. I 1,484,277

J. D. SCHAKEL ET AL ELECTRIC AUTOMATIC noon LOCKING SYSTEM Filed Jan. 5. 1922 4 Sheets- Sheet 2 Feb. 19, 1924.

J'. D'. SCHAKEL ET AL ELECTRIC AUTOMATIC DOOR LOCKING SYSTEM Filed Jan. 5, 1922 I176 UL A 7 0 4 Sheets-Sheet 3 J. D. SCHAKEL; ET AL ELECTRIC AUTOMATIQ DOOR LOCKING SYSTEM.

FiledJan. 5, 1922 4 Sheets-Sheet v Operqfz'nj Current aperaiing Curran/f W Patented Feb. 19, 1924.

UNITED STATES PATENT orrrce.

JACOB D. SCHAKEL AND l'OS EPH RICE, OF CHICAGO, ILLINOIS, ASSIGNORS T ELEVATOR COMPAN or AMERICA, OF CHICAGO, I'L'LINois.

ELECTRIC AUTOMATIC DOOR-LOCKING SYSTEM. 1

Application filed January 3, 1922.- Serial No. 526,752.

To all whom it may concern:

Beit known that we, JACOB D. SCHAKEL and JOSEPH RICE, citizens ofthe United States, residing at Chicago, in the county of 6 Cook and State ofIllinois, have invented a certain new and useful Improvement in Electric Automatic Door-Locking Systems,

of which the following is a full, clear, con-' else, and exact description, reference being 10 had to the accompanying drawings, forming a part of this specification.

Our invention relates to automatic door locking systems forelevators, and more particularly to a door locking system whereby 16 the'doors cannot be opened except when the elevator car is stopped opposite the floor atwhich the door mechanism. is operated. Ordinarily in automatically operated eleva-' tors it is possible when a car is passing a 20 floor to operate the lock to open the door by a pressure on the locking member all of the time that the car is approaching the floor, so that when the car reaches the proper position relative to the floor, the door can be forced open, thus stopping the elevator.

This is particularly objectionable in an elevator of this type as it makes it possible'for one person to take possession of the elevator car after another person has operated the push button to bring the elevator to the floor at which this person is waiting, thus pre-v venting the person operating the push button from obtaining the elevator car for his use, and in that way preventing the proper operation of an automatically operated elevator system.

Our invention has for its purpose to provide a systemior locking the doors of an elevator enclosure at the various floors,

40 whereby said doors cannot be opened except when the elevator car is stationary and when the elevatorcar is opposite the floor. Asthe elevator car will only stop opposite a floor when the automatic elevator Control mechanism is actuated by means of the push button at the floor, the elevator car can only be obtained by the person who has pushed the button, thus preventing others from obtaining the use of the car by taking it away from the person who should have obtained the use of the same by pushing the button.

It is a purpose of theinvention to provide an electrically operated lock of this character which is so constructed that no current passes through the electromagnet-coils of the 'matically operable elevators which comprises lock, except when the lock isbei'ngoperated and .the door 'isfistill closed, it being partic- "ularly a'purpose oftheinven'tion to prevent the dissipation ofthe electrical current due to energizing the coils of the electric door look when this isunnecessary, thus there is no current passing through the samewhen the door is open, and alsono current passing through the look when a door is ClOSGCl yGX- cept while the lock is being operatedby w operating either the knob on a swinging door or the catch on a sliding door.

It s a further purpose of the invention to provide a door "locking system for autoa source of current independent of the current for operating the car, and to'provide switching means in the conductors leading from sa1d sourceto the electric lock comprlsing a switch which is so constructed that the same will be open while the elevator-car is in motion, but which will be closed when the elevator car is not in motion. This Contact may beoperated by means of an electromagnet which is energized by the current used for operating the elevator car, or which is controlled by means of any desirable part on the control mechanism for the elevator or the driving mechanism therefor.

It is a further purpose of the invention to provide the conductors extending from the source of current mentioned above with a switch mechanism which. is normally open but which is closed in any desired manner when the elevator car is opposite a 'fioor or landing, and to provide for a normally open switch mechanism in said conductors be- I tween said source of current and said 'elec- 13110 lock which is closed by the actuation oi the handle on the doorin the case of a sliding door, or'the knob on the doorin the case of a swingingdoor, thus providing an'electrioally operated lock which will only be operated by. the electric current passing throughthesame-when the car is not 111 motion, when the caris opposite a landing or floor, and when the door at said floor or .landing. is being operated to open the same.

' Itis still a further purpose ofthe invention to provide an additional switch mechanism in 105 the case ota swinging door, which is closed 'while thedoor is closed, but which opens as soon as the dooris opened so as to break the circuit as soon asthe door 18 opened to prevent the unnecessary useof the electric cur- 11(7) rent after the door has been unlocked. In the case of a sliding door the contact is broken by the physical opening of the door thus making it unnecessary to provide an additional switching member as in the case of the swinging door. I

It is also an object of the invention to provide manually operated means for unlocking the door in either case, in case of emergency said manually operated means preferably comprising a member which may be operated fi'om'the interior of the hatch by means of a handle member which is' normally in operative position, and which may be unlocked from the outer side of the hatch by means of a key member. In the present in stance the key member used the handle. which is ordinarily in position on the inner side of the lock, said handle being made detachable. r

Other objects and advantages of our invention will appear as the description of the accompanying drawings proceeds. However, we desire to have it distinctly understood that we do not intend to limit our-,

selves to. the'exact details shown and described, but that we intend to include as part of our invention all such obvious changes and modifications of parts as would occur to a person skilled in this art, and

as would fall within the scope of the claims.

In the drawings: v r

- Fig. 1 is a side elevation of our improved locking mechanism for an automatically op erating elevator door with the cover platev j thereof removed Fig. ,2 is a transverse sectional View thereof showing the same applied to an elevator door, said section being taken on the line 2-2 of Fig. 1;

i Fig. 3 is an end view of the mechanism shown in Fig. 1 showing the portion thereof secured to the hatch;

Fig. 4 is a similar view of the portion of the locking mechanism secured to the door showing a portionof a swinging door in cross section;

Fig. 5 is a view similar to Fig. 1 of a modified form of locking mechanism such as used on a sliding door;

Fig. 6 is a diagram showing the arrangement of the electrical circuit for the form of the device shown in Fig. 1; and

Fig. 7 is a similar view of the electrical circuit used ,for the form of the device provided with end walls 14 and 15, the end wall' 15 being provided with openings through which the slidable bolts 16 and 16' are adapted to slide. The member 10 is also provided with an inwardly extending lug 17 which is provided with a constricted portion at 18 which passes through a slot 19 provided in the member 16 and with a similarlug 17 which is provided with a constricted end portion 18 which passes through a slot 19 in the bolt '16. A finger 20 extends into. the slot 19 from the HIZLlIrP'OIlZiOIl of the bolt '16, and a finger 20 extends into the slot 19 from the main portion of the bolt 16"; Coiledaround said fingers 20 and 20 are the springs end walls 22 and 22" of the slots 19 and 19 to the lugs 18 and 18. The inner end portions of thebolts 16 and 16 are bifur" cated so as to provide the legs 23 and 24 and 28 and 24 respectively. The extreme 21 and 21 which extend from the end portions of the legs 23 and 24'and235 i and 24 are bent at right angles to the length thereof to provide the laterallyfextending lugs 25 and 26 and 25 and 26' respectively. J

Mounted in the casing member 10 are the shafts 27 and 27 which are square in cross section, the member 27 having the knobs 28 and 28 mounted on a square end portion thereof and being provided with a sleeve 29 which is provided with a pair of. fingers 30 and 31 projecting laterally therefrom which are adapted to engage with the members 25 and 26 to move'the bolt toward the right in Fig. 1. The shaft 27 is provided with a similar collar 29' having the lugs 30 and 31 thereon, which are adapted to slide the bolts 16 to the right in a similar manner to the manner in which the bolt 16 is moved by actuation of the knobs 28 or 28'. her 12 is provided with an end wall 32 'whi'ch has a block of insulating material 33 mounted thereon, said block of insulating material being provided with stationary conductor strips 34, 35 and 36-, the strips 34 and 35 being provided with the right angularly bent end portions 37 and 38 which form stationary contacts which are adapted to be engaged by the contact member 39 provided on the end of the slidable bolt 40 which has the block 41 mounted on the end thereof, said block 41 being adapted to be engaged by the bolt 16 to hold the same in the position shown in Fig; 1, when the door is closed. The block 41 is slid- The casing memably mounted in an opening 42 in the end wall 43' of the casing 12 that faces the door. I

Mounted between the block 41 and the partition 44 is a coil spring 45 which is under compression when the parts are in the position shown in Fig. 1 and which tends to force the block 41 toward theyright 41 .will move to such position that the contact- 39v will engage with the contacts 37 and 38 due to the compression ofthe spring 45. The sp1'ing'45, however, is weaker than the spring 21 so thatwhen the 'operator'lets go f'of the door knob the spring2'1 will force the bolt 16 into engagement with the block 41 and force said b-lock-4lto substantially .the position shown in Fig. .1, so as to break the contact between the members 37 and 38 and the member 39.

It will be seen that when'the door 46 shown diagrammatically in F 6 is opened by turning on the hinges, the bolt 16 will be out of alignment with the block 41 and the spring 45 will hold the contact 39in engagement with the contacts 37 and 38. The switch formed by said contacts will accordingly beopen when the doorv is closed and closed when released by turning the knob, remaining closed while the door is open. The strip 36 and the endiofthe strip 35 opposite the contact 38 are provided with curved hook- like contact members 47 and 48. Cooperating with said contacts is a sliding contact member 49 which is provided with a bolt-like end portion50 which is adapted to project outwardly beyond the end wall 43 of the casing 12 due to the action of the coil springs 51-mounted between the partition 44 and the enlarged portion of the bolt. Y

It will be seen that when the door is closed, the member 50 will be in engage-- 'ment withthe end wall 15 of the casing 10 and the contact 49 will close the circuit between the fingers 47 and 48... However, when the door is swung open the support for the bolt 50 is removed" and the'spring 51 will move the same toward the right in Fig. 1, soas tobreak the engagement between the contacts 47 and 48 and the movable contact 49.

It will be seen that when'tlie door is opened the switch formed by the contacts 47.48 and 49 will be open due to the action of the movable contact 49 described above, but that when the door is closed the contact will'bc held in the position shown in Fig. 1, due to the engagement of the wall 15 with the bolt 50.

Mounted in the upper part of the casing 12 are the solenoids 52 ofan electromagnet and the armature 53 cooperating therewith which is mounted pivotally between the ears 54, as will be clear from Fig. 1. A spring 55 is provided for holding the armature 53 spaced from the pole piece 56 of the electromagnet when the electromagnet is not being energized, and a. finger 57 is provided on said armature 53 which engages-the end wall 32 of the casing to limit the movement of the armature toward said end wall and hold the same in such position that it capable of being attracted by the electro- .magnet'. Thev armature 53 is adapted'to engage With the finger 58iprojecting laterally: from the lever 59, which is pivotally mount" ed on the pivot member 60, and which is provided with a stop member 61 having a ledge 62 thereon adapted to receive the right angular end portion 63 of the link'64 pivoted at 65 in the casing 12 and pivotally secured at 66 to the link67 which is pivoted at one end thereof by pin 68 to the bolt member 69, which is provided with a beveled end portion 70, as is customary with bolts on doors. It will be seen that when the member 6 64, the jolnt at 66 cannot bebrokendue-to the fact that the link 64 cannot be swung out of the posltion shown in Fig. 2, the member 67 being pivotally connected with the member 64 intermediate the ends of said member'67. Accordingly When the parts arein the position shown in Fig. 2, the door can not be opened due to the engagement. of the member 70 with the bolt 16. vHowever, if the solenoids 52 are energized the'armature 53 will be attracted and the end thereof will engage with the pin 58 throwing the the pin 73 at the other end thereof. As soon as the door is opened the member 69 is swung back to the position shown in Fig. 2 due.

to the action of the spring 71, and as soon as the solenoids 52 are de-energized the parts will return to the position shown in Figs.

1 and 2. The bolt 16 being spring pressed will ride over the inclined-surface 74 when moving in the 'opposite'direction until it passes the end portion of the hook-like portion 70, after which it drops back of the shoulder 75 to again lock the door.

, It may at times be desirable or necessary to open the door manually, and for this reason the operating mechanism con'iprising the squared shaft 27 is provided. The shaft 27 is provided with a squared opening 76 in which the end portion 77 of the. detachable operating handle 78 is mounted. The handle 78 isin the form of akey-like member, and .is adapted to turn the shaft 27 so as to withdraw the bolt 16 when desired.

The member 78 is provided on theinner side of the door, and should it be desired to operate the door from the outside thereof, the key 78 may be removed from the inside means of the pivot is in engagement with the end of the link I -member 61 around in a counterclockwise dl.

V the car is not in motion,

and may be used on the outer side of the door for opening the same. The-shaft 27' is provided with the opening '76 which ex tends from end to end thereofland has a block 79 mounted therein. lJl-ounted in the block 79 is a pin 80 about which is coiled the compression spring 81. The pin 80 is slidably mounted inthe member 79 and is provided with a block 82 square in cross section, which isadapted to close the open- ,ing 83 in the circular plate 84:, so as to give a neat appearance tov the outer side ot the end portion 77 to enter the opening 83'. The in the position lever 59 isnormally held shown in Fig. 2 by means of the spring 85 which is hooked over the member 59, as will be clear from Fig. 2, at one end thereof and which extends around the finger 73 at the other end thereof.

Referring now to Fig. 6 the locking system comprises a source of electric current, such as the battery 86, which may be a storage battery or any other suitable source of current, from which the conductors 87 and 88 extend. The conductor 88 extends from the battery 86 to a contact member 89,

which together with the contact 90, forms the stationarycontacts of a switching mechanismcomprismgthe movable contact member 91. Extending from the contact 90 to the conducting strip 37 is the conductor 91 and from the conducting strip 36 the con- 7 ductor 93 extends to the solenoids 52. From said solenoids the conductor 9 1 extends to the stationary contact 95 which cooperates with the movable contact 96, said movable contact 96 being adapted to simultaneously engage with the contact 95 and the contact 97 at one end of the conductor 87. The switch 91 is operated by means of an electromagnet, which is energized by the current used in operating the elevator car so as to keep the switch open, or in any other suitable manner by means of any .part of the controlling mechanism for the elevator. Said switch member 91 is held out of engagement with the stationary contacts 89 and 90 when the elevator car is in motion by said electromagnetic means and is closed when in any suitable manner, such as by the action of gravity. The switch, comprising the members 95, 96 and 97, is operated by means of a stationary cam 98 on the elevator car, which is adapted to engage with a roller 99 on the end of a link 100 which is pivoted at 101 on any suitable support, and which carries the con tact 96 at the end thereof. lVhen the cam 98 engages with the roller 99 the parts are :1 ,aeagarr inoved into the positionshown in Fig. 6 so that tl'ie'cont'act 96 closes the gap between the contacts 95 and 97 Accordingly when the car is-stopp'ed, the contact 91 will'move' [to circuit closing position. The contact 96' will move to circuit'closing position-when the car is stopped opposite the floor, as the rollers 99 are located in such positions in "the elevator shaft that the cams 98 will enage therewith only when opposite a floor and the contact 39 will be in circuit closingpo'sition whenthe door is being opened by turning the knob, while the contact 19, will be in circuit closing position until the door has been moved in opening the same to such position that the same no longer 7 holds the contact 4:9 in engagement with.

the contacts cooperating therewith. Accordingly, when the knob 28 is turned and the car is stationary and opposite a floor,

' the solenoids 52 will be energized to operate the electric lock to unlock the toggle comprising the link 6 1 and the link .67, so that the door can be swung open. As soon as the door is swung open, however, the circuit is broken, due to the fact that the contact 49 moves out of engagement with its cooperating contact as previously explained, as soon as the door is swung open. This is particularly advantageous, as in this manner the dissipation of the electrical energy from the battery 86 is prevented through the circuit describedvabove should the door be left open and the elevator remain at a floor for a long period of time, the other contacts being still closed due to the fact that the elevator is stationary and at a floor;

In Fig. 5 is shown a form-oi lock which is used with a sliding door, said lock comprising a member 10 mounted on the door and having ears 11 for securing the same to said door and a member 12 which is adapted'to be secured to the hatch by means of securing means passed through the ears "13. Slidably mounted in the member 10 is a bolt 102 which passes through the guide member 103 and which is pivoted at 104 to the link 105, which link is pivoted at 106 to the arm 107 of the lever 108, which lever is pivoted at 109 in the member 10. The opposite arm 110 of the lever 108 is provided with a rib 111 which is adapted to be engaged by the fingers when passed through the opening 112 in the member 10'. Coiled about a stud 113 isa spring 11 1 having the end portion 115 engaging with the end wall of the casing and having the end portion 116 engaging with the rib 111.

The member 108 is also provided with an arm 11? projecting forwardly from the same and having a head 118 thereon which is adapted to engage with the block 119 to limit the movement of the lever in a mum tercloekwise direction, so that the same will not move further in a counterclockwise Jdirectiori" than the position shown in F ig; ,5 when the bolt .102 will be 'dra wn inside the casing loin/T he spring 114 is put un'der compressioniwhen the'arm 110 of the lever is :IDOVBCl toward. the right. in. Fig. :5,

so that said spring will tend to retract the shoulder 122 to limit the outward movement of the block,-and which has the pin 123 secured thereto, said pin 123 extending through the inwardly extending flange or partition 124 and being provided with a compression spring125 coiled about the same between said; flange 124 and'the flange 121, so that when said block 120 and the pin. 123

spring will be put under compression so as to again return the parts to the position shown in Fig. 5 when the pressure on the block 120 is removed; The block of insulating material 126 is provided with a pair of contact members 127 and 128 which are provided with hook-shaped end portions, said end portions being adapted to be engaged by the end of the member 123 when said member'is moved towardthe left in Fig. 5. Such action will take place when the handle 111 is moved toward; the right in Fig. 5 due to the fact that thebolt 102 will be projected intoengagement with the block 120. However, as soon as the'handle is released, the spring 11 1' will return the parts to'the position shown in Fig. 5, and the spring 125 will-return the bolt'or ,pin 123 to the position shown in Fig. 5, thusbreaking the contact between themembers-127 and 128 and said pin or bolt. i

Referring now to Fig. 7 in'whic'h is shOWn a sliding door 129, which sliding door is provided with the casing 10 carrying the act'uatingparts described above, the contact members 127 and 128-are shown with the cooperating contact123, which is actuated-in the manner described above. The circuit shown-in Fig. -7 is quitesimilar to that shown-in Fig. 6. except that only one switching device comprising the members 127, 128 and 123 isused at the door instead oftwo switching devicesas shown in Fig. 6. The switching devices comprising the contacts 95,- 96 and 97 andthe contacts 89, 90 and 91 and the conductors leading therefrom to the battery 86 and to the electrical-door lock comprising the solenoids 52 are of the same construction as those shown in Fig, 6, the same numerals being'used for said parts as in Fig. '6. The electrically operated lock is constructed of the same component parts as the lock; shown in Fig. 1, but the parts are arranged in"a"slightly different manner due toithe differentstructure of the door. The same-numeralsare appliedto these parts as in 1,.a'nd the operationthereof will be -readilyunderstood by referringto the descript-ion thereof in connection with Figs.

1 and 2. Thehook-likeehd portion of the member 69 engages with a hook-like mem; ber 130. on the end of-the pivot arm 131, said arm 131' being pivoted in" the casing 10 at 132 and having awspring l33secu'red thereto by-hooking the same over' said' arm at 134,

the =opposi'teiend of said spring" engaging with the upper' wall -135of the casing 10, wherebythe spring 133" will tend to turn the member-7131 in a counterclockwise direction in Fig. 5, so as to hold theFmembers 70'a-nd 130 -in'engagei'nent. A1shaft 136'is journaledi-in themember '10,' and is provided with an arm 137extending late-rally there I from, which' has a ledge 138 at the end thereare moved toward the left in Fig. 5, the

of which is adapted to 'e'ngagewith the underside of thearm 131 when the shaft'is'rotated in aclockwise direction. Said shaft 136is adapted to-be rotated by a key simii me-nt of thearm 137 and shaft 186.

It'wi'll be seen thatinthe system shown diagrammatically in Fig. 7 no current will pass through the 'solenoids 52 tounlo'ck the electrical look, except when the switch comprising the contacts 89, 90 and 91' is closed, which will'only' be closed when the elevator; caroperating currentfis OE, and when the switch comprising thefcontacts '95-;"96 and 97 is closed, which will onlytake place when the elevator car'is'opposit'ea floor, and'when the handle is being actuated on the door to open 'thefsameflas it will only be at that time thatfthe-conta'ct' l23will engage with the contacts 127 and128'to close the circuit. When all the abovementioned conta cts are closedy-the armature 58 will be attracted by the elcgctromag'net comprisingthesolenoid' 52} and will engage withthe' finger5'8 throwing the member 1 61 out of engagement withlthe shoulder 63, whereupon the member 69 will drop; downwardly so as to re-- lease the catch 130 from th'ecatch 70, when thedoor isp'ulled't'o the right. As thedoor 129 is slid open the member-10 will move away from the member :12 and the member door is open,- nor when the dooris closed,

except while-T the handle, is being-actuated by pressing on the same againstthe tension or the spring 114. It will thus be seen that the current from any suitable source, such as the battery 86, will not be dissipated due to passing through the solenoid 52 when the door is left open in a similar manner to that described in connection with Fig. 6;

It is, of course, to be understood that the members 40, 41, 49, 50, 120 and'121are insulated from the casings12 and 12 respectively in .any desired manner.

Having thus described our, invention,

what we desire to claim and secure by U. S. Letters Patent is: r c 1, A door locking system of the character described comprising a door, an electri-J cally operated lock for said door, a source ofelectric current, conductors leading from said source of current to said lockand switching means interposed between said lock and'said source of current, said switching means comprising a manually operable member independent of said lock .for closing said circuit. I

2. A door locking system for elevators comprising a door, a lock for said door,

electrically operated means for releasing,

said lock to unlock said door, a source of electric current, conductors leading from lock for said door, ajsourceof-electric current, conductors leading from said source ofcurrent to said look and switchingmeans interposed between said lockiand said source of current, said switchiug means closing said circuit when the elevator car is stopped to operate said lock to unlock said door.

4. A door locking system forielevators comprising a door, a lock, for said door, electrically operated means for releasing said lock to unlock said door, a source of electric current, conductors leading from said source of current to said lock and switching means interposed between said,

lock. and said source of, current, said switching means closing said circuit to unlock saididoor when th'e elevator caris stopped opposite a floor. v V

5. A door locking system for. elevators comprising lock for said door, a source of electric current, conductors leading from said source of current to said 'lock and manually operable switching means independent of said lockinterposed bet'ween said lock and said source of, current, said switching means closing said circuit when actuatedand the elevator car is stopped oppositei'a floor.

a door, an electrically operated 6. Alocking system for elevator doors comprising 'a lock electrically operated to unlock the same, a source of current and control means IIItQIPQSGd'bBtWQGD said lock and source of current, said IIlGflIlS COIIlPIlS- ing' .switching mechanism controlled by the.

position of the elevator car, switching mechanism controlled by, the controlling Inechanismbf said elevator car and manually operated switching mechanism.

7; A locking system for elevator doors comprising an electrically operated a lock, a source. of current and control means inter-1 posed between said lock and source of current, said -means comprising tswitching mechanism operated byna member on and controlled by the position of the elevator car,'switching mechanism. controlled by the controlling mechanismof said elevator car and switchin position of said door.

8. A locking system forelevator doors comprising a lock electrically operated-to unlock the same, a source otcurrent and 'control means interposed between said lock and. source of current, said'means comprising switching mechanismcontrolled by the position of the elevator car, switching mechanism controlled by the controlling mechanism of said elevator car and manu ally operated switching mechanism, said lock being provided with a manually operated emergency unlocking device.

'9. In a locking system of the character described, the combination. with an electrically operated lock of means for operating said lock comprising a switching device carried by the elevator enclosure, and operating means for said switching. device carried. by the elevator door, comprising a manually operable independent member adapted-to engage with a movable portion of; said switching device. V

10. In a locking system of they character described, the combination with an electrically operated lock of means for operating said lock comprising a'switching'device carried by the elevator, enclosure, andoperatingmeans for said switching device carried by; the elevator door comprising a member, adapted toengagewitha movable portion of said switching device movable intocir.-. cuit closing positionupon manual actuation of said operating means, said operating means being independentof said lock.

l1. Ina lockingsystem ofvthe character described, the combination with ran'electri cally operated lock of means for operating said lock comprising-a switching device carried by theelevato'r enclosure comp-rising a pair of stationary contact members, andia movable contact member cooperating there with and operating means for saidswitching device carried by the elevator door, said: movable contact being movable into circuit mechanism controlled by the izo closing position upon manual actuation of said operating means, said operating means being provided with means for retracting the same upon release thereof, said operating means being independent of said lock.

12. In a locking system of the character described, the combination With an-electrically operated lock of means for operating said lock comprising a switching device carried by the elevator enclosure, and operating means for said switching device carried by the elevator door comprising a member adapted to engage with a movable portion of said'switching device, and manually operable means for unlocking said door independently of said electrielock.

13. In a locking system of the character described, an elevator enclosure, a door, a latch for said door, an electrically operated device for unlocking said latch and a switching device for operating said unlocking device, comprising a manually operable member on said door independent of said latch.

14:. In a locking system of the character described, an elevator enclosure, a door, a latch for said door, an electrically operated device for unlocking said latch and a switching device for operating said unlocking de vice, comprising a manually operable member on said door independent of said latch and a mechanically operable switch member (.iperated by the position of the elevator.

15. In a locking device for elevators, an elevator enclosure, a door, means for locking said door comprising interengaging members on said door and said enclosure, the member on said enclosure being swingable out of engagement With the member on said door upon opening movement of said door, means for normally holding said member from swinging when said door is closed,

electrically operated means. for releasing,

said holding means and a'sWitch for operating said electrically operated means.

16. In a locking device for elevators, an

elevator enclosure, a door, means for lockingsaid door. comprising a catch on said enclosure adapted to engage means on the door to hold said door against opening, said catch being adapted to move out of locking posi- JACOB D. SCHAKEL. JOSEPH RICE.

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