US354366A - Charles r - Google Patents

Description

(No Model.)

0. R. WHITTIER.

SAFETY ATTACHMENT FOR ELEVATOR CARS. No. 354,366. Patented Dec. 14, 1886.

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UNITED STATES PATENT OFFICE.-

CHARLES R. WHITTIER, OF YONKERS, NEW YORK.

SAFETY ATACHMENT FOR ELEVATOR-CARS.

SPECIFICATION forming part of Letters Patent No. 354,366, dated December 14, 1886,

Application filed March 4, 1886.

To all whom it may concern.-

Be it known that I, CHARLES R. WHITTIER, of Yonkers, in the county of Westchester and State of New York, have invented a new and Improved Safety Attachment for Elevator- Cars, of which the following is a full, clear, and exact description.

The object of my invention is to provide a practical automatic safety device for elevators, to prevent the elevatorcar from falling in case the hoisting-ropes should break; and the in vention consists of the construction, arrangement, and combination of parts all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forrning apart of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional elevation of apart of an elevator, showing my invention applied. Fig. 2 is a sectional plan view taken on the line x 00 of Fig. l, and Fig. 3 is a transverse sectional elevation taken on the line 1/ y of Fig. 1.

A A represent the guidepo'sts of an elevator-hoistway, and B represents thetop crosspiece or head of an elevator car.

a I will describe one side of the attachment,

. edge of the wedge is held.

the other being similar.

The post A is provided with aguide-rail, O, which the slotted end of the head-block 13 embraces, as shown clearly in Fig. 2. Between the guide-rails G and one side of the headblock B is placed the wedge D, which serves to prevent accident in case the hoisting-ropes E should break. The wedge D is held in place by a casting, F, formed with beveled cheek f, in contact with which the beveled The casting consists of two cheek-pieces, which embrace the rail 0, connected by a central web, V, which holds them together against the opening action of the wedge. To still further strengthen the casting F, and to form a stop for the wedge, I connect the checks by strong steel bolts 1) b, thus bringing the main tensile strain of the opening action on wrought-steel. The bolts also serve as stops for limiting travel of the wedge. The wedge D is formed with lugs d d, to which the hoisting-rope E and counterbalance-rope G are respectively attached. This Serial No. 193,966. (No model.)

from itsconnection with the lug d, passes' downward under the side sheave, H,and thence under the central sheave, J, so it serves to draw the wedge D downward, and thus hold it out of but ready for action. The counterbalance-rope G, from its connection with the lug d, may pass directly upward to a counterweight pulley at the top of the elevator-hoistway, as indicated at the left in Fig. 1; or it may pass over sheave K, arranged above the wedges, and thence under central sheave, I, as shown at the right in Fig. 1, so that in case the rope E should break, and thus release the wedge D, the counterbalanee-weight will instantly draw the wedge D upward and bind the head B with the guide-rail O, and thus prevent the elevator-carfrom falling.

In case one hoisting-rope breaks, one wedge will stop the car. In case both hoistingropes break, both wedges will act, thus forming a double safety, which I deem desirable, but not necessary to the invention.

claim as new and desire to secure by Letters Patent- 1. The combination, with the guide-rail G, cheek-pieces f, and stopbolts b and b, attached to the elevatorcar, of the wedge D, to which the hoisting-rope and counter-weight rope are directly attached to act in opposition to each other, substantially as described.

2. The rail 0 and the head of the elevatorcage', formed with cheekpieces which embrace the rail 0, and the wedge D, arranged between the rail and one of the cheek-pieces, in combination with the hoisting and counter-weight ropes, the latter attached to the ends of the wedge and passed around pulleys arranged above -and.below the wedge, substantially as described.

CHARLES R; \VHITTIER.

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