US490275A - eaton - Google Patents

Description

2 Sheets-Sheet I.

(No Model.)

T. W. BATON. ELEVATOR BRAKE MECHANISM.

Patented Jan; 24, 1893.

(HoMadeL) 2 8heetsShe1-:t 2,

T. W. EATON. ELEVATOR BRAKE MEGBANISM.

No. 490,275. Patented Jan. 24, 11893.

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UNITED STATES PATENT THOMAS W. EATON, OF CHICAGO ILLINOIS, ASSIGNOR TO THE EATON (it PRINCE COMPANY, OF SAME PLACE.

ELEVATOR BRAKE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 490,275, dated January 24, 1893.

' Application filed Tune 27, 1892. Serial No. 438,066. (life model.)

passes through lever H is threaded with a To all whom it may concern.-

Be it known that I, THOMAS "W. EATON, a left hand thread. In the case of the lever H", citizen of the United States, residing at Chithe engagement with the thread of the shaft cago, in the county of Cook, in the State of is direct, but the engagement between the le- 55 Illinois, have invented a new and useful Imver H and the shaft is indirectasleeveKba provement in Elevator Brake Mechanism, of ing interposed between the shaft and the said which the following is a specification. lever H, such sleeve being threaded upon the This invention relates to the brake actuatshaft and having also a threaded exterior ening mechanism used upon elevators, and more gaging with the lever. The exterior thread 60 especially to that used upon hand operated upon the sleeve thus acting upon the lever H elevators. The mechanism is duplex in its is right handed. character, so that it may be used to set the Both the shaft and the sleeve are sepabrakes at will and at any point in the run of rately rotatable to force the levers against the elevator, and it is also adapted to set them the wheel. The shaft is rotated by a spool 65 automatically at the limits of the run. L rigidly secured to the shaft and operated Y Theinvention consistsin the novel construcby ahand rope j extending along the elevation and novel combinations of parts hereintor shaft Within ready reach of the operator, after fully described and pointed out in the either upon the car or upon any of the landclaims. ings. The hand rope extends down from op- 70 In the accompanying drawings, which form posite sides of spool L to and around the pula part of this specification, and in which similey i at the bottom of the elevator way, and lar letters of reference indicate like parts, may be guided en route by idlers 2'. When Figure 1 is an elevation of an elevator proone side of this rope is pulled down upon, the vided with my invention; Fig. 2 is a section spool and shaft are turned in such direction 7 on the line 22 of Fig. 1, and Fig. 3 is a deas to cause the setting of the brake levers,

tail section on the line 3-3 of Fig. 1. and when the other side of the rope is simi- In said drawings A represents the frame larly actuated, the spool and shaft are turned work of the elevator car or platform,and a a in a direction which releases the lovers, either the supporting cables thereof winding upon of these operations being permitted in any 0 the drum B upon the shaft 17. position of the car. The brakes are also au- 0 is the usual counterweight cable winding tomatically set when the car reaches its liniupon the drum 0. The shaft 12 is operated by its of travel by power applied to sleeve K. the gears D cl, the latter being fast upon the For this purpose another spool M is placed journal 6 of the wheel E operated by the upon the shaft J and made rigid with sleeve 3 5 power applying hand rope F. K, and rotated by a rope N secured to the r G is the brake wheel secured upon the side spool and passing from one side thereof up of wheel E, and H and H are the brake leto and over pulleys P p at the top of the elevers located at each side of the wheel G and vator way, thence down to and under a pulpivoted stationarily at h at their upper ends ley Q at the bottom of the way, thence up to 40 and with their lower ends free to be forced and over pulleys R 'r at the top, and thence toward each other when the braking power is down to the opposite side of the spool. That applied. portion of the rope between pulleys p and Q The mechanism for operating these brakeleis provided with a stop 71, adapted to be envers constitutes the novel feature of my'ingaged by the guide 0 attached to the car at 5 4, vention and consists of the following: A horithe conclusion of the upward travel, and upon zontalshaftJ is passed through the lowerend the other side or half of the rope between of each of the levers, and has a threaded enpulleys o" and Q is secured another and simigageinent with both of them, as hereinafter lar stop at adapted to be engaged by the guide set forth. That portion of the shaft which 0 upon the car at the conclusion of the downmo 50 passes through lever H is threaded with a ward travel. Vhenever this cable Nis acturight hand thread, while that part of it which ated by the car through the engagement of the stops and guides, it causes a rotary movement by the spool M and sleeve K, in the proper direction to bring the brake levers to bear upon the brake wheel. In order to release the brake preparatory to starting the car after it has been thus automatically stopped, the hand brake cablej is employed, and as soon as the car has moved far enough to destroy the engagement between the stop upon the cable N and the guide, the spool M and sleeve K are returned to their normal position automatically by a weight S suspended by a cable 8 also wound on said spool M. In order to prevent cable 5 from rotating the spool beyond its normal position, said cable is passed through a stationary eye 15 and has placed upon it an adjustable button T, which is so located as to come in contact with said eye at the proper time.

I claim:

1. The hand-operated elevator, wherein the brakes are combined with threaded setting devices,a hand rope for actuating the setting device at will, and a separate rope with stops foractuating the setting devices automatically at the limits of the cars travel, substantially as specified.

2. The elevator wherein the brake levers are combined with a shaft J having a threaded engagement with one brake lever, a spool and rope for actuating the shaft at will, a

. sleeve threaded upon the shaft and having a threaded engagement with the other lever, and a spool and rope for rotating the sleeve, substantially as specified.

3. The combination in a hand operated elevator, of brake levers II H, screw shaft J, having right and left hand threaded portions, spool L and its rope, sleeve K, and spool M and its rope, substantially as specified.

4. The combination with the brake levers, of the shaft J having a threaded engagement with one lever, a spool and rope for actuating the shaft at will, a sleeve threaded upon the shaft and having a threaded engagement with the other lever, a spool and rope for rotating the sleeve, and means for automatically actuating the last mentioned spool and rope at the limits of the cars travel, substantially as specified.

5. The combination in an elevator, of the brake levers, a shaft having a threaded engagement with said levers, sleeve K, a spool and rope for rotating said shaft at will, asec- 0nd spool and rope for automatically rotating said sleeve, stops upon the last mentioned rope, guides upon the car engaging said stops, and a weight and flexible connection for returning said sleeve to its normal position, substantially as specified.

6. The combination in a hand operated elevator, of brake levers H H, screw shaft J. having right and left hand threaded portions, spool L and its rope, sleeve K, spool M and its rope and Weight P for returning spool M. substantially as specified.

7. In an elevator, the combination, with the brake levers and the screw shaft by which they are operated, of a spool and hand rope for rotating said shaft at will, a sleeve threaded upon said shaft and acting upon one of the levers, and devices for rotating said sleeve independently of the shaft, substantially as specified.

8. In an elevator, the combination with the brake levers and their operating screw, of the sleeve K and means for rotating said sleeve independently one of thelevers being engaged by the screw and the'other by the sleeve, substantially as specified.

9. In an elevator, the combination, with the brake levers and their operating screw, of the sleeve K, and means for rotating said sleeve automatically at the limit of the cars travel. substantially as specified.

10. In an elevator, the brake levers and the operating screw, one of said levers being engaged directly by the screw, of a sleeve K interposed between the screw and the other lever and having a threaded engagement both with said lever and with the screw,in combination with means for rotating the screw in both directions, means for rotating the sleeve. and means for returning the sleeve to its normal position, substantially as specified.

THOMAS W. EATON. Witnesses:

EMMA HACK, H. M. MUNDAY.

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