US527366A - Half to william g - Google Patents

Description

(No Model.)

W. J. FERGUSON.

DEVICE FOR OPENING OR CLOSING ELEVATOR DOORS.

No. 527,366. Patented Oct. 9,1894.

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UNITED STATES PATENT OFFICE.

WILLIAM J. FERGUSON, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE- i HALF TO WILLIAM G. H. STUMP, OF SAME PLACE.

DEVICE FOR OPENING OR CLOSlNG ELEVATOR-DOORS.

SPECIFICATION forming part of Letters Patent No. 527,366, dated October 9, 1894.

Application filed June 12, 1894.

To all whom it may concern:

Be it known that 1, WILLIAM J. FERGUSON, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Devices for Opening or Closing Elevator- Doors, of which the followingis a specificati'on.

This invention relates to certain new and use'ful improvelrents in devices for opening and closing elevator doors.

The object of the invention is to provide a simple device by means of which the condoctor in an elevator car may cause the doors located at the var'ous floors to be opened or I closed as desired as the elevator ascends or descerds the elevator shaft.

The invention is illustrated in the acco mpanying; drawings, in which- Figure 1 is a view of an elevator door located on a floor and the mechanism connected with the door for ope ring and closing it. Fig. 2 is a side vie v'showing the stationary retractor which is located alongside of each door, the vertica ent" ess chain, and the trip-arm on the car which trave St s the retractor and actuates the said vc lie 1 chain. Fig. 3 is a detail view of the trip-t rm and showing its relative position vfth respect to the retractor.

Fig. 4 is a top or plan view of the trip-arm.

The letter A, in the drawings designates one of the ("core 0*. an elevator shaft located at each floor at d which, as usual, slides back and forth on a horinontal track, I), from which it is suspended by hangers, c. The door has at its top an upward projecting arm, d, made fast to a horizontal endlers chain, E, above the door by which the door is opened and closed as hereinafter described. This horizontal chain passes over a pulley, F, at one side of the door and also over one step, f, of a cone pulley, F, atthe other side of the door. The cone pulley has position above the elevator door and adjacentthe door jamb, e. A pulley, F, has position some distance below the lower end of the door and in a direct vertical line below the cone pulley, F, and a vertical endless chain, E, connects between the lower pulley, F and the step, f, of the cone pulley. 7

The vertical chain serves to actuate the horiseen No. 514,282. (No model.)

zontal chain and cause it to open and close the door, in the manner hereinafter described.

The pulleys, F, F, over which the horizon tal chain, E, passes, are relatively larger than the pulleys, f, F, over which the vertical chain, E, passes. arrangement, a certain movement of the said vertical chain will result in a much greater movement of the said horizontal chain which shifts the door, and this latter movement will produce a momentum sufficient to fully open the door.

The vertical chain, E, carries a downturned hook-lip, h, which engages with an upturned hook-lip, h, on the elevator door, and the two hook-lips when engaged serve as a catch to hold the door closed. The vertical chain also carries twoknocker blocks, '5, i, one block on each stretch of the chain, upon which a trip-arm, H, acts, said trip-arm being carried by the. car, to move the said vertical chain.

p The vertical retractor, G, is stationary and has two projecting curved faces, g, separated from each other by a straight face, g. This bar has position forward of and in a vertical line between the two stretches of the vertical chain, E. The retractor bar also has a curved face, 9 adjoining each of the pulleys, F, W,

which prevents the trip-arm from coming in contact with either of the pulleys when it is projected at that point.

By this construction and The trip-arm, H, has a yoke-end or bifurcated end provided with a roller, Z, journaled between the two arms, m, m, and said two arms project beyond theroller. This triparm is carried on the elevator car, the bottom, I, of which has a bracket, j, depending from it anda bell-crank lever, j is pivoted to the bracket. To one end of this bell-crank lever is attached a foot rod, 70, which projects up through the floor of the car, and to the other end of the bell-crank lever the trip-arm is connected. A spiral spring, is, around the I foot-rod, 70, tends to keep the rod in a normal raised position and the trip-arm retracted. The ends of the yoke-arms, m, m, of the triparm, take on each side of the vertical retractor bar, G, sothat the roller, Z, when the arm, H, is retracted will passclose by the outer edge by the vertical chain, whereby a certain movement of the said vertical chain will result in a greater movement of the horizontal chain; a vertically-moving car; and means on the car for actuating said vertical chain, substantially as described.

In testimony whereof I affix my signature in the presence of two witnesses.

WILLIAM J. FERGUSON. Witnesses:

CHARLES E. MANN, J12, O. CALVERT HINES.

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