US1330411A - Control and release device - Google Patents

Description

E. B. THURSTON.

CONTROL AND RELEASE DEVICE.

APPLICATION FILED MAR. 22, I9l6.

Patented Feb. 10,1920.

airman ERNEST B. THURSTOLL'OF TOLEDO, OHIO, ASSIGrNOR '10 THE HAUGHTON ELEVATOR & MACHINE (30., OF TOLEDO, OHIO, A CORPORATION OF OHIO.

oou'rnon AND IRELEA$E DEVICE.

Specification of Letters Iatent.

Patented Feb.10,1920.

Application filed March 22, 1916. Serial No. 85,941.

To all whom it may concern:

Be it known that I, ERNEST B. THURs'roN, a citizen of the United States of America, residing at Toledo, Lucas county, Ohio, have invented new and useful Control and Release Devices, of which the following is a specification.

This invention has utility when incorporated in control and release devices, especially as an automatic lock-out of power current for elevators when an elevator door is open.

Referring to the drawings: I

Figure 1 is a fragmentary view of an elevator well looking out toward the door,

with the car approaching the floor, showingv an embodiment of the invention in the elevator well;

Fig. 2 is a view of an embodiment of the invention in the door lock of Fig. 1, with the door closed;

Fig. 3 is a view of the mechanism of Fig. 2 as coacting in releasing position;

Fig. at is a side elevation of the first series of levers;

I Fig. 5 is a view on an enlarged scale of the rockable dog and its mounting; and

Fig. 6 shows an anti-friction connection between the first and second series of levers.

In the elevator well 1 at the'landing 2' is disposedthe slidable door 3. As the car 4 approaches the landing 2, the intercepter 5 comes into position at the nose of the dog 6. This device has special adaptation in connectionwith elevators of the so-called automatic or push button type, and embodies a safety device precluding opening of a door at any floor while the car is away, from or traveling past such floor, for should'the actuating member 7 be grasped to throw the dog6, the movement of the member 5 striking a sideof the nose of the dog 6 would rub therealong and tend to rock this dog 6. There would be no holding of the dog 6 by the member 5 as an abutment. The actuating member 7 is a lever having its fulcrum bearing 8 and the short arm 9 coacting in the'rocking of the lever to compress the yieldable means or spring 10 and thereby tending to throw the release member or latch 11 having the fulcrum bearing 12. These pivot or fulcrum bearings 8 and 12 may, in the embodiment of this device for elevator purposes, be mounted on or in a sliding door movable toward a fixed lock casing or box 13 carried by the well.

The actuating member has a lever arm 14 extending through a recess 15 of the casing 13 to engage the arm 16 of the'bell crank 20 carrying the pivot pin 21 for mounting the rockable dog 6. This dog 6 has its p0si- I tion normally maintained by the counterweight 22, .While the stability of this dog is further maintained by the coil spring 23 coacting with the lug 24ccarried by the pin 21 and the lug 25 carried by the dog. The dog is accordingly free to be rocked either up or down by the moving intercepter 5 but is normally maintained in a position to be confronted by or abut directly the intercepter 5 when the intercepter 5 is stationary and the elevator car is at a landing.

In this abutting action, any rocking of the bell crank levers'16, 18 tending to throw the pin 19 would leave the pin 21. fixed and the rocking of lever 18 would throw the arm 26 fast on the shaft 19 upward against the re-' sistance of the spring 27 from the position of this arm 26 as adjusted by the stop 28 co-.

acting with thearm 18. The arm 26 would not be lifted were'the dog 6 not intercepted by the member 5, This lifting of the arm 26 of the second bell crank 20, 26, coacts with the shoe or bearing 29 of the arm 30 of the third bell crank lever having its ful-. crum 31 in the casing 13. In any rocking of this arm 30 0f the bell crank lever 30, 32, the

arm 32 is rocked away from its holding positionabov ethe latch head end of the lever 11 protruding through the opening 33 and thus engaged in the casing 13. This rocking of the, arm 32 is against the action of the 7 spring 34 from: the arm 35 of the spring poised lever having the fulcrum- 36 in the casing 13. Thisspring poised lever has its second arm 37 coacting with the spring 38 forcing this arm 37 toward the latch recess 33 in the casing '13. This coaction of the secondseries of levers 30, 32; 35, 37, is such that with'the latchll in the recess .33, the lever 35, 37, has its spring 34 acting to hold the series of levers 30, 32; 35, 3,7.

With the latch head of the lever 11 out of r the casing 13, the action of the spring38 has 7 against this latch opening 33 to obstruct said" V with the door open; Further, the door may thrown the arm 37 of the lever 35, '37,

opening 33 as to entrance of the latchll thereinto. This causes the spring 34 to rock the lever member 30, 32, so that the contacts 39, 40, 41, 42, are open and arm 32, is away from the latch recess 33. 'Therocking of the lever 30, 32, whether from the arm 26 or from lever 32, 35, moves the switch contacts 39, 40, carried by the arm'30 away from the fixed contacts 41, 42, and thus breaks the circuit 43, which may interact to preclude.

driving oi the car when this switch is open. Asthis switch is open only when the door is open and is so opened by the opening of the door, byleaving the door open there is an automatic safety device precluding shifting of the elevator car away from a landing not be'open unless the car is at a landingin the normal manipulation of the apparatus. Even with any attempt at tampering with the apparatus, as by insertion of a member in the latch opening 33, the switch 39, 40, 41,

' 42, is only closed while such member is maintained in position.

These connections are simple in their interaction, for the dual movements are protected against tampering, may be assembled asa safety. device unit before installation, and are most easily and readily operable withthe usual freedom of a doorrelease device. However, supplemental freedom in case of operation may be attainedby provicL' ing the second'bell crank with the arm 44 instead of thearm 26 and mounting onsaid arm 44 the anti-friction roller 45 for antifriction coaction in the latch "freeingtrav'el with the arc shoe 46 of the arm 30 ofthe third bell crank lever.

"The switch 39, 40,41, .42 is so disposed with the electric connections that a .childinserting its finger in the latch opening 33 may not vreceive an electricshock.

' What is claimed and it is desired to secure by United States Letters Patent is: i g

l.' Acontrol'apparatus comprising a loci; housing,a relatively traveling pivoted latch, said housing having an opening providing a latch seat, an actuator carried with the latch, movable independently of the latch and having .a portion extending into the housing, a first device in the lock housing Operable by the actuator independently of affecting the latch, a second device, a rel a member forthe latch a settin member for the release member, and means for causing the first device to coact w th the seconddevice for shifting the release member into latch freeing position against the resistance of the setting member. 7

2. A control apparatus comprising a locl: housing, a relatively traveling'pivoted latch, said housing havinga latch seat, an actuatorcarried with the latch, movable independently of the latch and having a portion extending into the housing, a first device in the lock housing operable by the actuator independently of affecting the latch, a second device, a release member for the latch, a setting member for the release member, means for causing the first device to coact with the second device for shitting the releasemeinber into latch freeing position agalnst the resistance of the setting member until the latch is w1thdrawn, and a spring for holding the setting member inposition to be moved by the latch enteringitshousing seat.

3. control apparatus comprising lock housing, a relatively traveling pivoted latch,

said housinghaving a latch seat, an actuator carried with the latch, movable independently ofthe latch and having a portion e X tending into the housing, a first device in the lock housing operable by, the actuator. 1I1ClQPQIIClQDtlY of affectmg the latch, a sec-' ond device, a release member fol-the latch, a setting member for the release mem'ber, means for causing the firstdevice to coact with the second device for shiftingithe release member against the resistance of ,the setting member into latch freeing position, and connecting means between the setting member and the release member holding the release member away from locking position when the setting member is in position to obstruct entrance of the latch to the latch seat.

housing, having alatch seat, a latch movable into said seat, an actuator arried with the latch and extending into the housi ng,a first device in the housing operable by the actuator, a second device, a release member forthe latch, a settingmember for the release member, means for causing the first actuator,a second device, a release member 4. A controlapparatus comprising a lock for the latch, a setting member for the release member normally actuable into position to obstruct latch entrance to the latch seat, means for causing the first device to coact with the second device for shifting the release member, and connecting means between the members causing the setting member in latch seat obstructing position to hold the release member away from looking position.

6. Control apparatus including a pivoted latch, a holding seat for the latch, a setting member obstructing the seat when the latch is clear of the seat, and a release member operable from the setting member for looking the latch in the seat.

7. Control apparatus including a latch, a holding seat for the latch, a release memher for locking the latch in the seat, and a setting member obstructing the seat when the latch is clear of the seat abutted by the latch in the seat to throw the release member into latch locking position.

8. Control apparatus including a movablelatch, a holding seat for the latch, and relatively movable release and setting members, the latter member obstructing the latch seat when the latch is out and the former member obstructing the latch seat when the latch is in to preclude latch removal therefrom.

9. Control apparatus including a movable latch, a holding seat for the latch, a release member movable to lock the latch in its seat, a setting member for the release member, and a spring normally urging the setting member to obstruct entrance'of the latch to its seat and coacting in such position to shift the release member away from seat obstructing position.

10. Control apparatus including a movable latch, a holding seat for the latch, a release member movable to lock the latch in its seat, a setting member for the release member, and connecting means including a spring between the members causing the setting member in latch seat obstructing position to hold the release member away from looking position.

11. Control apparatus including a movable latch, a holding seat for the latch, relatively movable release and setting members, the latter member obstructing the latch seatwhen the latch is out and the former member obstructing the latch seat when the latch is in to preclude latch removal therefrom, a switch opened by the release member, and means coacting with the setting member to retain the switch opened.

In Witness whereof I alfix my signature.

ERNEST B. THURSTON.

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