US1298948A - Elevator interlocking device. - Google Patents

Description

F. c. HOL'BERG, JR. ELEVATOR lNTERiLOCKVING DEVICE.

APPLICATION FLED IAN I3 1919.

Patented Apr. 1,1919..

' 2*"SHEETS-SHEET d L u L alf.

Armen/Ex l F. C. HOLBERG, JB.

ELEvAToR INTEBLOCKxNG DEVICE.

APPLICATION FLED MN. 13| |919.

UNITE SATES AENT OFFICE.

FRANK C. HOLBERG, JR., 0F PHILADELPHIA, PENNSYLVANIA, ASSIG-NOR TO IEN INTERLOCK MANUFACTURING COMPANY, IN C. OF PHILADELPHIA, PENNSYLVANIA,

A CORPORATION OF PENNSYLVANIA.

ELEVATOR INTERLOCKING DEVICE.

Specification of Letters Patent.

Patented Apr. 1, 1919.

To all whom t may concern Be it known that I, FRANK C. I-IoLBERG, Jr., a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Elevator Interlocking Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

The object of my invention is to provide effective interlocking mechanism which will prevent the opening of the gate at each floor closing the elevator shaft except when the car is immediately opposite the landing and which will prevent the car being operated to leave the landing until after the gate is closed. Such mechanism is known in the art, and my more specific object is to simplify the mechanism as far as is consistent with insuring its certain and accurate operation. A further object is to so construct the mechanism that it cannot be tampered with by thevelevator attendants so as to render it inoperative. v

A preferred embodiment of the invention is shown in the drawings. This preferred construction embodies certain structural eatures disclosed lin an application filed by Thomas WV. Jenkins, Serial No. 244,680, tiled July 13, 1918, with the omission of the device therein shown for rendering the interlocking mechanism inoperative and with the interlocking mechanism therein shown substantially .simplified and improved. I do herein claim as my invention any struc* tural features disclosed in'said application.

Figure 1 is a partial face view of the gate closing the shaft and of that portion of the locking mechanism directly coacting therewith.

Fig. 2 is horizontal section showing the locking mechanism in plan on an enlarged scale.

Fig. 3 is a section through part of the car showing in elevation the mechanism for locking the controller.

Fig. 4 is a vertical section on the line 4-4 of Flg. 2.

Figs. 5 and 6 are face views of the part of the locking mechanism shown in Fig. 1 in two other positions respectively.

Fig. 7 is a vertical section on the, line 7--7 of Fig. 5., v Y

Fig. 8 is a vertical section on the line 8 8 of Fig. 6.

Fig. 9 is an end view of the locking mechanism looking to the left of Fig. 5.

Inside the elevator shaft, at each `lan-ding a locking plate a carries the locking mechanism for the gate y -at that landing. e.v

represents the floor of an elevator car shown as on a level with the landing. l

A bar b, secured to the gate y, `extends downward over the face of the plate a, where it engages, when the gate is closed or only slightly opened, a notch c in a locking wheel o. The positions of the bar b and wheel c, when the gate is fully closed, are shown in Fig. 1. a

Assuming that the car is not directly opposite Ithe landing, and that it is attempted to open the gate, the wheel c is turned, in clockwise direction, by the bar b, until a lug e on the wheel engages a stop formed by the inside corner of one end of an angle plate f secured to the plate a. At this time the b'ar b has not cleared the notch in wheel o and therefore the gate is locked from further movement in the direction to open.

It will be observed, in Fig. 7 that the.

wheel o is pushed out, in the direction of its axis, by a spring g, so as to cause the lug e to aline with the stop on plate f. When, however, the gate is fully closed and the wheel c is in the position shown in Fig. 1,

a lug h on the wheel 0 engaging the inner face of the plate f, holds the wheel c in its inner axial position. As the wheel is turned away from this position, the internal cam face 14 of the stop plate f, along which the lug h slides, permits the spring to push the wheel o away from plate a to cause the lug e, when it reaches the plate j", to strike it. In the return movement of the wheel c, the

lug l1., riding along the cam face 14, pushes the wheel in toward the plate a. If, howover, in the clockwise movement of the wheel c away from the position shown in Fig. 1, it is maintained pressed in against the spring g,'the lug e will, in its turning movement,'olear plate f and move along within .its inside face until the lug h on thewhe'el contacts with a stop i xed on plate a, as shown in Fig. 6. Before the wheel has reached this position, the bar b will have cleared the notch in wheel c so that the gate may be fully opened.

The wheel 0 is pressed inward againstv the action of spring g, only when a car is directly opposite a landing. The mechanism for so acting upon wheel' c will now be described. l

Pivoted on the plate z is a hinged plate having, along its free end, a ridge m and feet n adapted to be engaged by a cam y' forming a part 'of wheel c. Assuming that a car is not directly opposite the landing, and that the wheel c is turned in the initial gate-opening movement above described, the cam j engages the feet n and swingsthe plate 7c out on its pivot until the cam clears the feet 'a' and the turning movement of the wheel c is arrested by the stop-plate f as above described. If, however, thef outward .swing of the plate 7c be arrested'before it has cleared the cam y', the wheel c .will be kept from moving out along its aXis, which will allow the turning movement of the wheel c to continue and release the bar b from engagement therewith to permit the gate to vfully open.y The Voutward swinging movement of. thefplate'f: is so arrested only when aI caris directly opposite the landing and by mechanism about to be described. llt may be mentioned that while the free' end of ythe plate la, when the gate is fully closer, is-

held in by means of a spring o (see Fig; 2), the powery of this spring is not sufficient to overcome the spring g.

Beneath theloor e of the car is an angle frame p to which i's pivoted a three-armed lever Q. (lney of the arms of 'lever g is pivotally connected tofa lsleeve r slidable through the frame p. Within the open inner end of this sleeve is inserted a pin r abutting against a vertically extending shoe s beveled at kopposite ends and backed by `a stroi'ig tension spring t. The shoe s is carried `by a short arm 8 which is pivotally mounted on a small bracket u secured vto the frame p. The, outward movement of the shoe 's is limited by an adjustablestop-bolt a. A spring w between one arm of lever and the frame p acts to normally hold the sleeve 7' and shoe s outward as far as the stop o permits. In this position, when a car is-running-v past, or has just stopped at, a landing, the shoe s or the hinged plate 7c.

Vlfhen, however, the car has stopped di-` rectly opposite a landing, the shoe S is immediately opposite the ridge m. lt now, thegate be opened, the wheel c will have turned through but asmall arc when the outward'movementI of the hinged plateA 7c (caused by the engagement of the -cam j withfthefeeta) will be arrested, and during a short further turning movement of the wheel @the continued engagement between the eami'j and.y the'rplate will' maintain the Wheel-:c` close to the plate @,so; that, in the still further movementiotlthe wheel: @the just clears the ridge m' lug e will clear the plate f. As hereinbefore explained, this permitsthe bar a to ride out of thel notch in wheel a and the, gate to be fully o ened; It should be, stated',` at this point, t at the spring t is an emergency spring, normally inactive, and of substantially greater strength than the spring g; also that the spring w, although weaker than the spring t, plus the weight of Y the controller locking mechanism hereinafter described, is substantially stronger than the spring The elect, therefore, of the initial action etween cam jv and' hinged plate "7c is necessarily not to displace the shoe s but to maintain the wheel 6- close to plate a, as described. i

However,` before the cam j hasclearedthe hinged plate @the further actionof cam upon hinged plate will be to cause the latter to'operate directly upon shoe s, to swing the lever gon. its axis. .The lever,y g'-, through a horizontal rod l0 and albell crank 11, operatesv an upright locking.y rod' 12, which is adapted, when thelever g is'. swung as described, to. enter a notch in the con troller. 13 on the car. At the time of this operation, the controllery has been' brought to the position required to stopthe car and it is held locked, by the rod l2, in this position until the gate y is returned to its closed position. In the end portion of the closing movement oie the gate, the, bar b' returns the wheell c to its initial position and spring-w at once acts tofreturn the lever g toits normal position, thereby restoring' the parts to the position shown-in Figs-l and@l and withdrawing rod l2- from engagement with controller l Thus the locking or latching mechanism described performs the function of an interlock, holding the car from being operated when the gate is opened.'v and locking the gate. from opening eXceptwheny ther car is directly opposite thelanding.

The construction herein.y set fort-h is animprovement upon existing mechanism., in that it is certain in its action, very simple in con-v struction when its certainty of' operation is considered, and incapable of.' being readily tamperedvwith to render it inoperative.- @ne of the serious objections to certain known interlocks, which otherwise possess considerL able merit, is the ease withwhich the interf locking mechanism may be pluggedj (33 '71, this is undesirable; It Vmay be' that at; certain times the controller lockmay be removed or otherwise rendered inoperativev to permit thefcar f tooperate while" oneJ ogt`l the gates is in an open position tenths purpose of making some repair. In these circumstances the shoe s Will project out into the path of the hinged plate lc and Will be struck thereby When the car presses the open gate. The effect Will be to compress the spring t until the shoe s has been overridden. Otherwise, the car would receive lan abrupt check, or, What is more likely, the locking mechanism Would be broken by the impact.

Having now fully described my invention, What I claim and desire to protect by Letters Patent is:

l. In elevator locking mechanism, the combination With the landing gate, of a turnable member, means on the gate adapted, as the gate is moved from its closed position, to turn the turnable member, and a stop adapted to arrest the turning movement of the turnable member and thereby hold the gate from further opening, said turnable member being movable in the direction of its aXis into position to enable it to clear the stop and thereby permit its turningmovement to continue until the gate is released.

'2. In an elevator locking mechanism, the combination With the landing gate and the car, of a turnable member movable in the direction of its aXis, means on the gate adapted, as the gate is moved from its closed position, to turn the turnable member, a stop adapted to arrest the turning movement of the turnable member and thereby hold the gate from further opening, a spring adapted, before the turnable member is engaged by the stop, to move the turnable member along its aXis into alinement with the stop, and means carried by the car, and operable when the car reaches a predetermined position, to hold said spring from so operating, thereby enabling the turnable member to clear the stop.

3. In elevator locking mechanism, the combination with the landing gate and a movable car, of a turnable member, means on the gate adapted as the gate is moved from its closed position, to turn the turnable member, a stop adapted to arrest the movement of the turnable member, said turnable member being movable in the direction of its axis into position to enable it to clear the stop, a cam on the turnable member, a swinging member adapted to be actuated by the cam, and a shoe carried by the car adapted, When the car is in a denite vertical position relatively to said gate, to limit the cam-actuated movement of the swinging member, thereby causing the latter, as thel turnable member continues to turn, to maintain the turnable member in position to cause it to clear said stop.

4. In an elevator locking mechanism, the combination With the landing gate, the car, a controller on the car, and a controller lock, of a turnable member, means on the gate adapted, as the gate is moved aWay from its closed position, to turn the turnable member, a stop for the turnable member, a spring tending to move said turnable member along its aXis into alinement With said stop, means carried by the car adapted to restrain said turnable member as it turns from being moved into alinement With said stop by said spring, said car-carried means being also operable by said turnable member to operate said controller lock.

5. In an elevator locking mechanism, the combination With the landing gate and the car, of a turnable member movable in the direction of its aXis,fmeans on the gate adapted, as the gate is moved from its closed position, to turn4 the turnable member, a stop adapted to arrest the turning movement of the turnable. member and thereby hold the gate from further opening, a spring adapted to move the turnable member along its aXis into alinement With said stop, mechanism carried by the car and operable When the car reaches a predetermined position to hold said spring from so operating, thereby enabling the turnable member to clear the stop, a controller on the car, said mechanism being operable by said turnable member to lock said controller, and a spring adapted to return said mechanism to normal position.

G. In an elevator landing mechanism, the combination with the landing gate, the car, a controller on the car, and a controller lock, of a turnable member, means on the gate adapted, as the gate is moved away from its closed position, to turn the turnable member, a stop adapted to arrest the movement of the turnable member, a spring adapted to render said stop operative, mechanism carried by the car and operable, by said turnable member, when ,the car reaches a predetermined position, to render said controller lock operative and move said turnable member out of operative relation with said stop, and a spring adapted to return said mechanism to normal position'.

In testimony of Which invention, I have hereunto set my hand, at Philadelphia, Pa., on this 27th day of December, 1918.

FRANK C. I-IOLBERG, JR.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents,

Washington, D. 0.

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