US543153A

US543153A - kidder

Info

Publication number: US543153A
Authority: US
Publication date: 1895-07-23
Anticipated expiration: 1912-07-23

Description

(No Model.) l A 3 Sheets-Sheet l.

l W..P. RIDDER. SAFETY DI'IYIGE'POR BLEVATURS. v

No. 543,153. Pat'ntedJuly 23, 1895.

atto-'amig I (No Model.) 3 Sheets-Sheet 2.

W. P. KIDDER. SAFETY DEVIGBD FOR ELEVATORS.

No. 543,153.u 'Patented July 2%1895.

Il r Ar y A III..

www

, l .1 ...E rfFl. 1 1l: mi,...

a sheets-sheet 3.

QNo Model.

W. P. KIDDER. SAFETY DEVICE EOE 'ELEMTQRSl No. 543,153. Patented July v23, 1895 Strom/m NrTeD STATES ATnNr OFFICE.

WELLINGTON P. KIDDER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TOTHE KIDDER ELEVATOR INTERLOOK COMPANY, OF NEW YORK, N. Y. I

SAFETY DEVICE FOR ELEVATORS.

SPECIFICATION fOlming part f Letter-S Patent N0; 543,153, dated. July 23, 1895.

Application filed May 8,1895. Serial No. 548,596. (No model.)

.To all whom it may concern.-

Be it known that 1, WELLINGTON P. KID- DER, a citizen of the United States, residing at Boston', in the county of Suolk and State of Massachusetts, have invented a certain new and useful Improvement in Safety Devices for Elevators,` of which the following is a specilication, reference being had to the accompanying drawings. Y v

This improvement relates to that class of safety devices forelevators wherein the hoisting apparatus cannot be set in motion while a well-door is open, nor a well-door opened while the car is in motion; and its object is to provide a device of thisV kind which' will bevery reliable, cheaply made, easily applied, and not likely to get out of order.

To these ends the invention consists in the mechanism hereinafter more particularly described and then definitely claimed at ythe end hereof.

In the accompanying drawings, Figure 1 represents a vertical vsection of an elevator well and car provided with my improvement and with part of `the front of the car. broken away. Fig.'2 isa vertical section on the line ww, Fig. 1. Fig. 3`is a similar section-with some of the parts ina different position. Fig. 4 is a bottom plan of the car. Fig. 5 is an elevation of part of the front of the car. Figs.

6 and 7 are modifications which will be more fully described hereinafter. Fig. 8 is an enlarged detail of alatch-operator.

Referring now to the details of the drawings by gures, l represents thev welll provided with doors 2, each having a bar or projection 3 thereon and sliding on guides 4. Fastened by screws or otherwise to the lower guides are L-shaped brackets 6, the horizontal part forming a guide fora wire or rod 7, hereinafter further described-and a support forA a door-fastener or alatch 8 pivoted at 9 to the vertical part of the bracket 6, and normally dropping behind the end of the bar 3, whereby the door is prevented from being opened as long as the latchis down, as shown in the lower part of Fig. 1.

The Wire or rod 7 may be suspended from a lever 10, from the opposite end of which hangs a weight 11 to keep the wire taut, or a spring 12 may beemployed for the same purpose, or both weight and spring may be used if preferred. The lower end of the Wire is connected to a bell-crank lever 13, carrying a weight 14, whichshould be heavy enough to overcome the weight 11 or spring 12, or both of them if both are employed. The lower end of the lever forms a detent 13', which engages with a notch 16 in the pulley 16, which represents the ordinary pulley commonly used to move the valve shaft or stem 17. These two coact-ing parts-the detent and the notched pulley-thus form a lock, as they prevent any movement of the valve.

Attached to the bottom of the car 15 is a block 18, and pivoted at 19 to said block is a 'lever 20, carrying a foot-piece 2l and a catch 22, both pivoted to said lever, as shown. The upper'end of the catch 22 works in a guide 23 and is toothed, as shown at Fig. 8. Its lower end is acted on by a spring 25, the fixed end of which isv securedto the block 18.

' Firmly secured to y'the wire 7 in any convenient manner are blocks 26, one at each door, and they are so arranged that when a latch is lifted, so as to allow a door to open, said latch bears'on the under side of the block just above it and moves the wire upward.

The operation is as follows: ASupposing the car is just about to stop or has stopped, the operator presses his footupon the foot-piece 21, which depresses the lever 2O and the` catch 22, causing lone ofthe teethof the latter to catch on the short end of the latch 8, and thus through the block'next above it, raising the Wire 7, which will operate the bell-crank lever 13, and cause the detent 13' to enter the notch 16 in the pulley or disk 16,"and thus lock the valve shaft or stem from turning. When in this position, the Well-door opposite the car can be opened, and when opened the bar or stop 3 will hold the latchrS in its raised position, which in turn will keep thewire 7 raised, and the latter will hold the detent 13 in the notch 16 in the pulley 16, so that as long as the door is open the valve of the hoisting apparatus cannot be operated, but when the door is closed thelatch will descend, thus allowing the detent I3 to leave the notch 16 under the force of the weight llt.

From the foregoing it will be seen that this apparatus forms a perfect lock for the valve, the movement of which is governed entirely by the position of the well-doors, so that the valve cannot be operated while a well-door is open; nor can any well-door be opened unless the car is opposite said door and the valve is in the closed position, for if an attempt be made to open a well-door when the valve is open and the car in motion the detent I3 will come in contact with the periphery of the pulley and will thus be prevented from moving sufficiently to allow of the opening ofthe door, and perfect safety is thus secured under all circumstances.

Instead of the weight or spring for keeping the wire taut, I may sometimes use a returnwire, as shown in Fig. 6, in which case a T- shaped lever 13 will have to be used, or instead of a Wire I may use a stift rod 7', as shown in Fig. 7.

Instead of making the notch 16 in the ordinary pulley on the valve-stem, I may use a separate disk or casting of suitable form connected wit-h said shaft. For convenience in drawing the claims, I shall call said pulley or disk and the coasting detent a valve-lock, for, as before stated, they constitute a lock that prevents the valve from being moved, meaning to include in said term not only the usual pulley on the valve shaft .or stem, but any device connected with said valve shaft or stem by which the valve is locked fast by the coaction of said device and a detent controlled by the position of a well-door.

It is obvious that the wire shown in Fig. l and the rod shown in Fig. 7 both operate the detent by tensile strain, and that stiffness is not required, but either will accomplish the desired object, and not only may a wire or rod be employed, but a rope or chain, also, although I prefer a wire. In view of this and in order to cover either form of device for operating the detent, I shall in the following claims refer to the wire or rod as a detent.- operator, except in specific claims, where the wire may be specially mentioned, and mean to include in such term either a wire, rod, rope, chain, or equivalent device.

What I claim asnew isl. The combination in an elevator and with a well-door and the valve mechanism thereof, of a door-fastener, a valve-lock operating directly upon said Valve mechanism and independent of the operating rope, and intermediate connections between the valve-lock and door-fastener for holding the valve locked when the fastener is in position to allow the door to be opened, substantially as described.

2. The combination in an elevator and with a well-door and the valve mechanism thereof,

of a door-fastener, a valve-lock operating di rectly upon said valve mechanism and independent of the operating rope, intermediate connections between the valve-lock and doorfastener for holding the valve locked when the fastener is in position to allow the door to be opened, and a car provided with means for operating the door-fastener, substantially as described.

3. The combination in an elevator and with a well-door and the valve mechanism thereof, of a door-fastener, a valve-lock operating directly upon said valve mechanism and independent of the operating rope, intermediate connections between the valve-'lock and door- .fa'stener for holding the valve locked when the fastener is in position to allow the door to be opened, and a car provided with means operated by the foot for operating the doorfastener, substantially as described.

4. The combination in an elevator and with a well-door and the valve-operating mechanl erated by said foot lever and operating on the' fastener, substantially as described.

5. The combination in an elevator and with the well-door and the fastener thereof, of a car, a foot-lever 'and a toothed catch for operating the fastener, substantially as described.

6. The combination in an elevator and with a well-door and the valve-operating mechanism thereof, of a door-fastener, a valve-lock, intermediate connections between the valvelock and door-fastener, and a projection on the well-'door to hold the fastener in araised position, substantially as described.4

7. The combination in an elevator and with a well-door and the valve-operating mechanism thereof, of a door-fastener, a valve-lock, intermediate connections between the valvelock and door-fastener, a projection on the well-door to h old the fastener in a raised position and the locking device in engagement, substantially as described.

8. The combination in an elevator and with a well-door and the valve mechanism thereof, of a door-fastener, a valve-lock operating directly upon said valve mechanism and independent of the operating rope, a detent-operator moved by said fastener and operating the valve-lock, substantially as described.

9. The combination in an elevator and with a well-door and the valve-operating mechanism thereof, of a door-fastener, a detent-operator moved by said fastener, and a detentconnected with the detent-operator, and a vdisk on the valve-shaft or stem having a notch to receive the detent, substantially as described.

10. The combination in an elevator and with tof;

IIC)

illel Well-doors and oar thereof, of a wire 7 In testirnony whereof I affix my signature, running parallel with said doors, blocks 26 in thepresence of two Witnesses,this 27th day 1o on said Wire,latohes S for fastening the doors of April, 1895. closed operated by said blocks a tension dev V5 vice for keeping the Wire taut,a lever 13 pro- WELLUN GTON P' KIDDER' vided with a detent 13.', and a disk 16 on the Witnesses: v valve-shaft having a notch 16 to receive the WILLIAM J. MILLER, detent, all substantially as described. 4 R. S. BARROWS.