US604957A

US604957A - Limited

Info

Publication number: US604957A
Authority: US
Publication date: 1898-05-31
Anticipated expiration: 1915-05-31

Description

2 sheets-sheet 1.

W. BENNETT. ELEVATOR SAFETY DEVICE.

(N0 Model.)

Patented May 31, 1898 A flnlllllllllllllfflllllzlfl fll/llz v I [NV-ENTOR 7/2422, 5 amid WITNES-SES w ATTORNEYS 2 SheefsS heet'2. W. E. BENNETT. ELEVATOR SAFETY DEVIGE.

(No Model.)

' No. 604,957. Patented May 31,1898;

WITNESSES I ATTORNEYS specification.

andstopping rope 0?.

UNITED STATES ATENT was WALTER'E. BENNETT, or 'CARBONDALE, PENNSYLVANIA, nssienon ro m IIENDRICK MANUFACTURING COMPANY, LIMITED, onsn in PLACE.

" ELEVATOR SAFE Y-Davies, I

SPECIFICATION forming part of Letters Intent-No. 604,957, dated'May 31, 1898.

Application filed may 20, 1897. i

bondale, in the county of Laekawanna and State of Pennsylvania, have invented a certain new and usefulImprovement in Elevator SafetyDevices ot'which the following is a This inventioncontemplates the provision of mechanism whereby the opening of the door of an elevator-hoistway will securely lock the starting and'stopping rope of the elevator-car in such manner as to preclude the operation of such car until after the closing of the door. Its purpose is to preclude accidents due to the hoistway-doors being open while the elevatorcar is in operation. j

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a vertical section of a hoistway provided with sliding doors and an elevatorcaroperating in such hoistway. Fig. 2 is a similar View showing the invention as applied to an elevator operating in a hoistway equipped with hinged or-swinging doors. Fig. 3 is a horizontal section illustrating, on an enlarged scalc,-the mechanism shown in Fig. 1.

Fig. 4 is a similar view showing, on an ening a hinged or swinging movement, Figs. 2

and 4. Doors of the former character are commonly provider. with waysor tracks a.

13 designates the elevator-car, having the doorway b and consisting generally of the bottom 1), side's I), back b", and front I), in

the latter of whic'h'the doorway b is formed. Phe bottom I) is provided with the usual perforation I), through which passes the starting .0 C designate arms, one end of each of which is keyed or otherwise secured to the rocking shaft or pivot c. The upper end of pivot c '50 is mounted in'a fixed bearing 0, itslower end SerialN 637,872. (No model.)

bottom b. Beneath the car-bottom the pivot c is rigidly secured to one end of the arm D. The arms 0 C, with the arm I), form asa whole a bell-crank lever. l

Pivoted in the free ends of the arms C C is is beveled at e, as shown in Fig. 3.

projecting through a perforation c in the oarv roller E, capable of revolution iirits bearv The end of the'barc F designates a lever fulcrumed atfto the under side of the car-bottom b. The free end of this lever is provided with a clutch for grasping and securely holdingthe starting and stopping rope I)? when said lever is moved to the proper position for that purpose. In the present instance I have shown-a conventional'clutch mechanism consistin of a block if, securcd to the under side of the car-bottom adjacent to the rope b, said block heipg provided with a jaw f". The free end of the lever is provided at a point also adjacent to the starting and stopping rope b with a similarjaw f As wilt he readily seen, the movement of the lever F upon its fulcrum serves to release or grip (according to the direction of the movement) the rope If.

G designates a connection between. the arm D and lever F. This connection is here shown asconsisting of two rods joined by a turnbuckle g. The function of said turn-- buckle is to take up slack and generally to provide for the propel-adj ustmentol the parts.

The operation of the structure shown in Figs. 1 and 3 is as follows: The hoistway doors in this embodiment of the invention are of the sliding variety. \Vhcn the car reaches the floor, the door A is opened by sliding the same toward the left in the ways. During this movement the bar e is brought into contact with the roller E, (first at the heveied end of said bar,) whereby the roller i pressed finwardly toward the interior of the car. This movement operates the bell crank mechanism, consisting of arms C C and D,

rec

or hoistway casin g.

connecting-rod G causing a corresponding movement of that end of the lever F to which the rod-G is attached, whereby the clutch mechanism is brought into operative relation to the starting and stopping rope, so as to grip the same and thereby preclude its movement while the door A remains in open position. Before the rope if can be operated it is necessary to close the door A. In doing his such door is moved to the right, and vheu it has passed beyond the roller E the atter resumes its normal posit ifon (that shown 11 Fig. 3) by reason of the tension exerted by springd. Thiscausesacorrespondingmovement of the arms C and D and rod G, and the lever F releases the clutch mechanism and permits the starting and stopping rope to be operated.

Turning now to the structure illustrated in Figs. 2 and t, it Will be seen that the construction of the safety device is the same as that heretofore described, with the exception of the means coaoting with the door for causing such device to operate. In this instance, as before stated, the door A is of the hinged variety, conventional hinges being shown at o The inner or hinged end of the door is provided with a cam H, here shown as operating through the slot 71. in the doonjamb Normally-that is to say, when the door is in closed position, as shown in l-the cam II is out of engagement with the roller 13., When the door is opened, however, said cam is brought into contact with said roller, and the latter is pressed inwardly toward the interior of the car, whereupon the same operation takes place as that heretofore described in connection ith the structure of Figs. 1 and 3, when the bar 6 of the sliding door A presses the roller in thesame direction-i. (9., the clutch mechanism operated to firmly grip the starting and stopping rope and preclude the the movement of the car.

What I claim, and desire to secure by Letters Patent, is-

In a safety device for elevators having the operating-rope on the latch side of the hoistway-door, the combination of a car, a bellcrank lever attached thereto, a roller on one end of said bell-crank lever adapted to roll upon the hoistway-door when said door is moved, a lever upon the opposite side of the ear, said lever having a clutch for the operatin g-rope at one end thereof,and an ad ustable connection between the ends of said levers, substantially as set forth.

This specification signed and witnessed this 18th day of May, 1897.

W'ALTER E. BENNE'I" Witnesses:

-L. A. BASSETT,

W. T. COL'VILLE.