US1178198A - Lock for elevator-gates. - Google Patents

Description

W. A. WILLIAMS. LOCK FOR ELEVATOR GATES.

2 SHEETS-SHEET I.

Patented Apr. 4, 1916.

m n c o D H N 0 m 2 W m P A 0 000 H0 O J O z 6 19 l .w 8 7 n a 3 l INVENTOH WITNESSES- ":u: coLumum PLANOGRAPH .Ccu. WASHINGTON, D. C.

v w, A. WILLIAMS.

LOCK FOR ELEVATOR GATES. APPLICATIONYFILED ocT.2i. I9l5.

1 ,178, 1 98., Patented Apr. 4, 1916.

2 SHEETS-SHEET 2- INVENTOR ATTORNEYS WITNESSES so a tion, arrangement of parts and combinations of elements which will hereinafter be fully To all whom it may concern:

WILLIAM A. WILLIA S, F BARTON, OHIO.

Specification of Letters Patent.-

LO C K FOR ELEVATOR-GATES.

Patented Apr. 4, 1916.-

Application filed October a7, 1915. Serial no]. 58,249.

Be i known that I, WILLIAM A. WIL- LIAMS, a citizen of the United States of America, and resident of Barton, county of Belmont, and State of Ohio, have invented certain newj and useful Improvements in Locks for Elevator-Gates, of whichthe following is a specification. v j I This invention relates broadly to; locks for elevator gates, and more particularly to a locking mechanism for the gates at the l of the shaft.

mouth of mine-shafts and the like; and it has for its primary object to provide mechanism whereby such gates are maintained locked until the cage has assumed its proper loading and unloading position at the mouth A further object is to provideajdevice of the character mentioned which is simple,

durablev and comparatively inexpensive in its construction and which shall passes,

numerous advantages over the locks com monly employed. And a further object is to provide, in connection with the gate locking mechanism, means for indicating at a distant point, as the. engine item] from which the elevator is controlled,the position occupied by the gate. 1

V Vith these and other objects in view, the invention resides in the features of construcdescribed, reference being had to the "accompanying drawings, forming a part of this specification, in which' Figure 1 is a front elevation of an elevator i gate and elevator cage, to which the parts composing the invention are applied; Fig. 2] is a side view of a portion of the bottom ofthe cage and an adjacent portion of the s framework at the mouth of a shaft, showing partsof the invention applied thereto; Fig; 3 isan enlarged detail elevation of said parts; Fig. 4 is a bottom plan view of the same; and Fig. 5 is, a section on line 5+5, Fig. 3.

Referring to said drawings, in which like I designating charactersdistinguish like parts .1 and exit from said cage being had through throughout the several views--1 indicates generally a shaft elevator or cage and 2 the gate at the mouth of the shaft, entrance to said gate. Mounted at a suitable point, as upon thetop of a member 3 of the frame provided about the mouth of the shaft is the horizontal portion 4 of an angular plate 4 while a vertical portion 4. ofs'aidplate rests against the inner face of said member 3, as is most clearly shown in Fig. 3. Bigidly mounted upon said plate adjacent to the angle thereof is a hinge member 5 to which is hinged or pivoted the upper end of' an arcuately curved inwardly facing abutment or cam 6 to the lower end of which is pivotedthe lower end of a lever 7. Said lever inclines upward and outward to the rear of the vertical portion 4" of plate 4: and is pivotally mounted at a point intermediate its ends upon rearwardly directed lugs 8 carried on the rear face of said portion l The upper end ofsaid lever is pivotally connected to the inner end of a horizontally movable slide 9 which operates maintaining the slide 9 in an outwardly, or

rearwardly, thrust position.

Provided in the horizontal portion 4 of plate 41 and in the slide 9, respectively, are apertures 13 and 14 which normally occupy positions out of register, but which are brought into register when the slide 9 is drawn outward under pressure applied to the cam 6. Said apertures are designed to receive therein the lower end of a vertically disposed dog 15 having a notch 16 in which a portion of the slide 9 seats when the latter occupies its normal rearwardly thrust position, said dog being thus locked against upward movement and, consequently, prevent ing elevation of a latch-bar 16 to which it is attached at its upper end. Said latch-bar has one end pivotally mounted upon the gate 2 and seats adjacent to' its outer end in an open keeper 17 which is fixedupon a sta tionary post 18 located adjacent to the end of the gate. Thus, as is apparent, the gate is normally maintained locked and may be opened only when the slide 9 is drawn to a position wherein its aperture 14 registers with the aperture 13 in plate 4, in which 130- sition the latch-bar 16 and suspended dog 15 may be freely raised by hand power ap plied to the outer end of said bar.

To provide for automatically freeing the rod to permit the opening of the gate when the cage assumes a proper position at the mouth of the shaft, a suitablebumper mechanism is provided. Said mechanism may be of any type suitable for engaging,

y sill 20. Horizontally slidable on the face of said plate is a slide-member 21 which has journaled in its outer end a roller 22, said member being heldin position by keepers 23 carried by said plate. The inner end of said slide-member is pivotally connected to a lever 24: at a point intermediate the ends of, the latter. Said lever has its lower end pivotally mounted on said plate 19 and when occupying its rearmost position maintains said roller 22 withdrawn from operative relation to the cam 6. When occupying its forward position, however, said lever holds said roller in a position wherein it will engage and thrust the cam 6 back for releasing the dog. In practice, the roller occupies its outwardly. thrust position so that when the cage has risen to its proper position at the surface, the gate is thereby caused, through the intermediate mechanism, to be unlocked.

Any appropriate means may be employed for indicating at a distant point, as in the engine room from which the movements of the cage are controlled, the closed and open positions of the gate. An example of such means comprises a dial indicator 25 located in the engine room, said indicator being disposed in a battery circuit the opposite terminals of which are respectively connected to contact pieces 26 and 27 carried by the latch-bar 16 and the keeper 17 at points where they will engage for closing the circuit when said bar is received by said keeper.

What is claimed is 1. The combination with an elevator and a gate guarding the entrance to an elevator shaft, of a latch-bar carried by said gate, a keeper disposed in fixed position and adapted for receiving an end of said bar when the gate is closed, a dog carried by said bar, means mounted adjacent to the mouth of the shaft and interlocking with said dog when the bar is received in said keeper for normally preventing disengagement of said bar from said keeper, and means carried by the elevator for releasing said dog when the elevator assumes a predetermined position.

2. The combination with an elevator and a gate guarding the entrance to an elevator shaft, of a latch-bar carried by said gate, a keeper disposed in fixed position and adapted for receiving an end of said bar when the shaft, of a latch-bar carried by said gate, a

keeper disposed in fixed position and adapted for receiving an end of said bar when the gate is closed, a dog carried by said bar,

spring-held means located adjacent tothe' mouth of the shaft for locking said dog against movement to prevent removal of said bar from said keeper, and means carried by said elevator whereby,when the lat ter assumes a predetermined position, said locking means is rendered inoperative.

4. The combination with an elevator and a gate guarding the entrance to an elevator shaft, of a latch-bar carried by said gate, a keeper disposed in fixed position and adapt ed for receiving an end of said bar when the gate is closed, a dog depending from said bar, a horizontally movable latch, means for normally holding said latch in a position for interlocking with said dog, and means carried by the elevator for eifecting the withdrawal of saidlatch frominterlocking relation'with said dog' when the elevator assumes a predetermined position. I H j 5. The combination with an elevator-and agate guarding the entrance to an elevator shaft, of a vertically movable latch-bar having a depending dog provided with a notch therein, and means for interlocking with said dog for preventing vertical movement of the latter; said means comprising a horizontal plate mounted in fixed position at'the mouth of said shaft, an arcuately curved member hinged at its upper end to said plate, a lever having its lower end pivotally connected to the lower end of said curved member and being pivotally mounted in-f termediate it's ends to a fixed point reargate is closed, a dog carried by said bar,

ward of said curved member, a horizon tally movable latch having one end "piv otally connected to the upper end of said lever, said plate and said latch having apertures therein which are adapted to register in one position of said latch and which are designed to receive the lower end ofsaid dog, and a spring disposed to exert pressure against said curved member for thrusting said latch to a position wherein said apertures are'out of register and the latch engages the notch in said dog; and means carried by the elevator whereby,'when the latter assumes a predetermined position, said curved member is forcedibackagainstthe tension of said spring for withdrawing said latch to release said dog.

6. In a device of the character described, the combination with a gate latch having a depending dog, of means for interlocking with said dog to prevent raising of saidv latch, said means comprising a stationary plate apertured to receive said dog, an arcuately curved abutment having its upper end pivotally connected to said plate, a lever pivoted intermediate its ends at a point rearward of said abutment, said lever having its lower end pivotally connected to said. abutment, a latch pivotally connected to the upper end of said lever and slidable underneath said plate, the last mentioned latch having an aperture designed in the retracted position of the latch to register with the aperture in said plate, and a spring disposed to maintain said slidable latch in a rearwardly thrust" position interlocking with said dog, said slidable latch being adapted to be retracted by rearwardly directed pressure applied to said abutment.

In testimony whereof, I afiix my signature in presence of two subscribing witnesses.

WILLIAM A. WILLIAMS. Witnesses:

R. M. SIMPSON, E. W. HARRIS.

Copies of this patent may be obtained to lfive cents each, by addressing the "commissioner of Patents, Washington, D. G.

Images