US1224182A - Door lock for elevators. - Google Patents

Description

R. F. LE BROCQ.

DOOR LOCK FOR ELEVATORS. APPLICATION FILEDJUNE 28. 1916. RENEWEDMAR. 15.1911.

Patented May 1, 1917.

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DOOR LOCK FOR ELEVATORS.

APPLICATION FILED was 28.. me. RENEWED MAR. 16.1917.

1,2Q4J82, Patented May 1, 1917.

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RICHARF F. LE BROCQ, OF NEW YORK, N. Y., ASSIGNOR TO LE BROCQ COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

EDGE-LOCK FOR ELEVATURS.

Continuation of application Serial No. 53,092, filed September 28, 1915.

Specification of 'Letters Patent.

Serial No. 106,323. Renewed March 16, 1917. Serial No. 155,373.

To aZZ whom it may concern:

Be it known that l, RICHARD F. LE BRooQ, a citizen of the United States, and a resident of the city of New York, county of Kings, and State of New York, have invented a new and useful Improvement in Door-Locks for Elevators, of which the following is a full clear, and exact description.

My invention relates to improvements in elevator door locks, and more especially to that class of locks in which the controller circuit of the elevator car is only closed and operative when the several doors of an elevator well are locked. The general object of my invention is to produce a simple locking mechanism which provides for the wt mostsai'ety, and yet which enables the Operator to control the elevator to the extent of moving it to a floor in case the elevator is stalled between -floors.

My invention is intended to produce an electrically controlled locking system in which the controller circuit is closed and opened by the closing and opening of the door, and more particularly by the operation or the door look, so that the controller circuit will broken in case the lock of any door is unsecured. Still more particularly my invention relates to the more common.

form of elevator doors in which a burdock is used, that is a vertically sliding bar on the door which engages a catch, and the controller circuit is opened and closed by the movement of this slide bar of bar-lock. Another feature of my invention is to pro vide for each elevator door a snap switch which is operated by the door lock, and which quickly makes and brealrs the circuit so that there is p actically no danger of injury to the sun ch, and consequent disruption ol' the circuit.

This application is a con' prior application l lo. 53,0952, 1 2c, 1915.

My invention is also intended provide an extremely simple and absolutely reliable apparatus by means of which the elevators can be operated with the utmost safety.

Reference is to be had to the accompanying drawings forming o' this specification, in si iilar ce characters indicate corresponding paws all the Figure 1 is a broken inside elevation of the bar lock and snap switch connected therewith one wall of the switch casing being removed and the switch being shown in neutral position.

Fig. 2 is an edge view of the construction shown in Fig. 1.

Fig. 3 is a view generally similar to Fig. 1, but showing the switch snapped into a position to close the circuit, and

Fig. is a diagrammatic View of the controller circuits including the baby switch and emergency switch.

The elevator door 10 can be of any usual construction, and l have shown the ordinary sliding door having thereon the customary vertically arranged slide bar ll which is preferably enlarged at the top to form a head ll, and which slides in guide brackets 12 and 13 on the door. The slide bar 11 is provided with a handle 14 by which the operator can move the door backward and forward, and move the bar vertically. The slide bar 11 is normally raised by the spring 15 arranged between the bracket 12 and the head ll The general arrangement of the slide bar shown is similar to that in common use.

The top of the bar 11 is inclined as shown at 16, so that it will engage theinclinedsun face 17 of the catch 18 which is secured in the elevator well adjacent to the upper ed e of the door, and when the door is closed the inclined parts 16 and 1? will {rictionally engage, the slide bar 11 is pushed downward, and when the bar has passed the catch 18, the spring 15 forces the bar upward behind the catch 18, thus locking the door.

The vertical movement of the slide bar lit in locking or unlocking the door operates a snap switch 19 to close the circuit through the controller 4.4.- of the car, which circuit will he referred to more specifically herein afier. do not limit the invention to the particular form of snap switch or to the particular connection between the switch and the slide bar ll, though I have shown a preferred construction in which the head 11 of the slide her is recessed near the top and on-the inner side as shown at 29, so as to slide into engagement with a lug 21 on the slide bolt 22 which moves vertical in the switch casin being secur 'he ust more doc.

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10, and the slide bolt has a limited movement by means of the slot 24 therein and the limiting screw 25 which extends through the slot and into the casing 23. .The slide bolt 22 is recessed as shown at 26 to receive the head 27 of the generally horizontal switch arm 28 of the snap switch, which switch arm as a whole is of a generally T shape, and is pivoted at the bottom as shown at 29. A

stem 30 rises from the arm 28, the stem being widened at the top and terminating in lugs 31 at the upper extremity, which lugs are spaced apart so as to permit the striking pin 32 to lie normally between them. This striking pin 32 projects from a tumbler 33 which is pivoted to the casing just behind the stem 30 of the main switch arm as shown at 34., and at the upper end the tumbler has a contact 35 which is insulated as shown at 36 from the body of the tumbler. This contact 35 is adapted to close a circuit between the spring arms 37 which are provided with binding posts 38, and are spaced apart as shown in Fig. 2, being secured to a bracket 40 and separated therefrom by means of insulation as shown at 39. Near one extremity of the arm 28 is a pin 41 which is secured to a retractile spring 42 which lies generally parallel with the arm 28 and is secured at one end as shown at 43 to the casing 23.

The operation of the switch is as follows: When the slide bar 11 and bolt 22 are raised in the action of locking the elevator door, the main switch arm 28-34 is tilted on the pivot 29, thus bringing the pull of the spring l2 out of alinement with the points.-fi1-29- 43, and below the pivot pin 29. This causes the main switch arm to give a quick jump so that one of the lugs 31 striking the pin 32 of the tumbler 33, snaps the contact 35 quickly beneath the contacts 37 and closes the circuit. \Vhen the door is imlocked the reverse operation takes" place. The arm 2834 is actuated in the opposite direction and the second lug 31 strikes the pin 32 and jerks the tumbler in the opposite direction, thus opening the circuit.

I have not shown the controlling mechanism except in diagram because this is precisely as usual and may be of any preferred type. The controller 4.4 is carried on the car in the customary manner, and the car is also provided with a baby switch 46 and an emergency switch 45.

The circuits are as follows: The source of supply comes in at the point A through any approved connection inthe main elevator circuits. Normally it will follow the wire a through the baby switch 4:6, thence through the wire 5, the several. switches 19 at the several doors, the controller, back to the source of supply. The wire 6 is also connected to a wire 0 which connects through the switch 45 to the baby switch 46. If the switch 45 is opened the current flows as already outlined. If, however, there is an accident to the circuit in the door mechanism and it is necessary to operate the elevator to bring it to a floor, the switch 45 is closed and the current then flows through the wire a, the switch 46, the switch 45, the wire 0 and the wire ,6 back through the controller to the source of supply, thus cutting out the door mechanism.

I wish it distinctly understood that while I have shown a type of switch and connections which I prefer and which are thoroughly practical, still I do not limit the in vention'to the connections shown or the particular form of switch illustrated.

Especial attention is called, however, to the arrangement of the snap switch which can be used in connection with any typeof spring bolt. This has the advantage over any arrangement ofwire or knife switches ordinarily used, because with such switches the door is apt to rebound when closed, and contact causes these switches to are and burn out; whereas with my type of switch and connections the door is locked before the switch snaps, thereby avoiding any possibility of opening the switch by the rebound of the door. The same advantage applies on opening the door, as the switch snaps and breaks contact before the door is unlocked.

I claim:

1. A system of the kind described comprising an elevator door, a slide bar thereon forming a part of the door lock, an electric circuit, a car controller in said circuit, a switch for making and breaking the circuit, means for operating the switch by the movement of the slide bar of the lock, and a connection between the slide bar and the switch operating by the opening and closing of the door.

2. A system of the kind described comprising an elevator door, a locking slide bar thereon, a switch having a slide .bolt automatically engaging in and disengaging from the slide bar by the opening and closing of the door, an electric circuit including said switch, a car controller in said circuit, and means for operating the switch by the longitudinal movement of the slide bar.

3. In a system of the kind described, the combination with the electric switch and the slide bolt depending therefrom, of the elevator door, the locking slide bar thereon, and a separable connection between the slide bar and its bolt, said connection being made and broken by the opening and closing of the door.

4. In a. system of the kind described, the combination of the elevator door and the slide bar thereon forming a part of the lock, said slide bar having a recem therein, of an electric switch adjacent to the door, a slide bolt for operating the switch, and a lug on the slide bolt engaging the recess of the slide bar of the lock.

5. In a system of the kind described, the

combination with the elevator door and the slide bar thereon forming a part of the lock, of a slide bolt on the switch having aseparable connection with the aforesaid slide bar and a snap switch operated by the movement of the slide bolt.

6. In a system of the kind described, the combination with the elevator door and the locking slide bar thereon, of a switch adjacent to the door, a slide bolt in the switch having a separable connection with the aforesaid slide bar, a tilting switch arm connected with the slide bolt, a spring connection between one end of the switch arm and a support near the slide bolt whereby the tilting of the switch arm past a given point causes the spring to snap the said arm, a pivoted tumbler having closing means thereon, and lugs on the switch arm spaced apart and adapted to engage the pin of the tumbler.

7. In a system of the kind described the combination with the elevator door and the locking slide bar thereon, of an electric switch, a slide bolt separably connected with the aforesaid slide bar, a tilting switch arm connected with the slide bolt, a spring connected with the switch arm and a support and adapted to move the switch arm suddenly when the latter is past a given point, a tumbler pivoted near the switch arm, means on the switch arm to engage and tilt the tumbler, and circuit closing means on the tumbler.

8. A system of the kind described comprising an elevator door, a vertically movable slide'bar thereon forming a part'of the door lock, an electric circuit, a car controller in said circuit, a catch above the slide bar to engage the latter and over which the slide bar passes in closing the door, a switch for making and breaking the circuit, said switch being arranged behind the catch soas to be engaged by the slide bar after the latter passes the catch, and means for operating the switch in both. directions by the movement of the bar lock of the door.

9. A system of the kind described comprising an elevator door, a vertically moving slide bar thereon forming a part of the door lock, an electric circuit, a car controller in said circuit, a catch above the slide bar to engage the latter and over which the slide bar passes in closing the door, a switch for making and breaking the circuit, said switch being arranged behind the cap so as to be.

operated by the slide bar after the latter passes the catch, and means for opening and closing the switch by the longitudinal movement of the'bar lock of the door.

RICHARD F. LE BROCQ.

Witnesses:

W. J. MCCLURE, E. W. HAVILAND.

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