US1380125A - Tension-equalizing and shock-absorbing device - Google Patents

Description

F. E. TURNER.

TENSION EQUALIZING AND SHOCK ABSORBI'NG DEVICE.

APPLICAHON FILED on. 11. 1920.

1 0,125. Patented May 31,1921.

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APPLICATION FILED OCT: H- 1920.

1,380,125., Patented May31,1921;

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FREDERICK E. TURNER, OF KANSAS CITY, IEISSO'U E1, ASSEGNGR T0 KANSAS CITY ELEVATOR MANUFACTURING COMPANY, 035 KANSAE? CFITY, MISSOURI, A. C03- PORATION 0E MISSQURI.

TENSION-EQUALIZING All?!) SEOCK-ABSORBING DEVICE.

Specification of Letters Patent.

Patented May 31, 1%21.

Application filed October 11, 1920. Serial No. 416,217.

To all to 710m it may concern:

Be it known that I, FREDERICK E. TURNER, a citizen oi? the United States, residing at Kansas City, in the county of Jackson and State oi Missouri, have invented certain new and useful improvements in Tension-Equalizing and Shoclr-Absorbing Devices; and I do declare the following; to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanyingdrawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to elevators, the primary object being to provide a tension equalizer and shock absorbing' device, particularly applicable for use in connection with elevator, including a multiple suspension so that the shocksand lifting strains will be approximately equally distributed to all of the cables connected to the elevator as well as to equalize the strains throughout the hitch.

It is particularly the object of the invention to eliminate shocks and strains to the cables caused by su dden'starts and stops of the elevator and to prevent one or more cables from becoming slack so as to throw the strain and load upon the remaining cables.

Also, it is important to equally distribute the shocks and strains throughout the elevator lifting mechanism and my invention contemplates the provision oi? means whcreby this may be accomplished, the construction being such that the friction between the car and its guide rails, caused by uneven loading, will be reduced, this being possible because of the fact that the car is suspended from two or more points instead oi he customary single-point suspension in the center oi": the car crosshead.

In the drawings,

Figurel isa perspective view of an elevator car, showing the construction of the shock absorbing springs, the equalizing links to which the cables are fastened, the equalizing levers connecting the links and the springs, and the multiple suspension.

Fig. 2 is a side elevational view of an elevator car, parts being broken away to show my invention.

Fig. 3 is a cross sectional view on the line S3 of Fig. 2.

Fig. i is a detail view of a lever, showing the links for connecting the spring rod and a link for engagement with the cross links whereby two alining links are connected together.

Fig. 5 is a perspective view the Shock absorbing spring; rod-supporting links, and

Fig. 6 is a view partly in elevation and partlyin section of a shock absorbing spring showing the arrangement thereof.

1 and 2 are the vertical elevator guides which guide the elevator car consisting of the vertical channels 3 and'c. The draw head is shown as comprising the parallel top channel beams 5 and 6 and the basket or cage portion 7, thefioor of which is secured to the vertical members 3 and 4+ in any approved manner. The pa ticular construction of the cage and its guides form no part of my present invention, the invention being confined to the device for connecting the elevator car to the hoistingcables, etc.

Near the respective ends of the channel beams 5 and 6 are spring seats 8 and 9, which are supported upon the upper, outwardly projecting flanges of the channels in any well known manner and serve as abutinents or seats for the coil springslO and 11, which. provide resilient connections between the elevator and certain lever and link mechanism to be reterr .l to hereinai'ter.

By re'lerene to Fig. 1 it v. ill be observed that the lower flanges of the channels 5 and 6 are provided with bearings 12 and 13 in which aremounted transverse pivot shaits ii and 15, passing through the ears or projections 16 and 17 of the bearing clamps 1S and 19 on the levers 20 and 21.

The levers 20 as well as the levers 21 are preferably arranged in pairs and are adapted to rock about their respective fulcrums 14- and 15, the pairs of lovers being arranged in aline rnent shown in Fig. 1 and on opposite sides of the longitudinal center 'of'the elevator cage.

being provided with a tension nut 27 which may be screwed upon the threaded end of the rod 24: to increase the tension of the spring.

The inner ends of the lovers 21 are provided with upstanding equalizing links 28, two for each lever 21 and the links 28 correspond to links 29 for the levers 20, the alining links 28 and 29 being connected by a cross link 30 to which the cables 31 and 32 are secured. The lever 20 is likewise provided with upstanding links 33, corresponding to the links 22 for lever 21 and said links are associated with the spring 10 in substantially the same way as are the links or levers 21 with the spring 11. Therefore, it will be observed that if the car is about to start, an upward pull on the cables 31 and 32 will exert an upward pull on the inner ends of the levers 20 and 21, distributing the shock or strain to the springs 10 and 11, the arrangement of levers being such that the pull will be equalized throughout the lever mechanism and prevent shock or strain being communicated to any particular cable.

It will also be observed that when the car comes to a sudden stop, the sudden strain or shock will be communicated to the entire lever and link mechanism and be absorbed thereby so as to prevent undue strain being communicated to the cables.

If a heavy car is used, the tension of the springs 10 and 11 may be increased by screwing down the nuts 27 and 27' for the springs 11 and 10 respectively. If, however, the car is relatively light or the load is relatively light the tension on the. springs may be relieved by unscrewing the nuts a sufficient amount. Therefore, it will be apparent that the tension may be varied to accommodate varying conditions.

I prefer to arrange the levers in sets or pairs, as shown, although this will not be necessary under all conditions. Where they are so arranged, however, a more eflicient equalization and distribution of the shocks or loads may be had.

It will be observed from the foregoing that a device constructed in accordance with my invention is adapted to be applied to ordinary elevators so as to absorb the strains and shocks and prevent slack in the cables, thereby enabling the elevator to successfully perform service for a longer period than would be possible where the strains were allowed to be localized in the hoisting mechanism,

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

1. In combination, an elevator, a yieldingly supported device connected to the elevator, said device comprising a pivoted lever, a yielding connection between the elevator and one end of t e lever, and a cable connection at the other end of the lever.

2. In an elevator tension equalizing, and shock absorbing device, sets of parallel levers, the sets being in alinement, means for yieldingly connecting the outer ends of the sets of levers to the elevator, and means connecting the inner ends of the adjacent sets of levers together.

3. In an elevator tension equalizing and shock absorbing device, sets of parallel levers, the sets being in alinement, means for yieldingly connecting the outer ends of the sets of levers to the elevator, means connecting the inner ends of the adjacent sets of levers together, and cables connected to the last named means.

4. In an elevator tension equalizing and shock absorbing device, a pivoted lever on one side of the center of the elevator, an alining, pivoted lever on the opposite side of the center of the elevator, means yieldingly connecting the outer ends of the levers to the elevator, and cable-supported means for shackling the inner ends of said levers together.

5. In combination, an elevator and its drawhead, a pivoted lever on the drawhead, a second alining, pivoted lever on the drawhead, means yieldingly connecting the outer ends of the levers to the drawhead, and cable-supported means for shackling the inner ends of said levers together, said means comprising upstanding links and a cross link connecting them.

6. In combination with an elevator drawhead comprising two parallel beams, transverse shafts j ournaled to the beams, alining pairs of levers carried by the shafts, upstanding links carried by the outer ends of said levers, cross links connecting the upstanding links, threaded rods carried by the cross links, coil springs surrounding said rods, spring seats on the beams, adjusting nuts on the rods and bearing upon the springs, and cable-attaching links connect- 110 ing the inner adjacent ends of the alining pairs of levers.

7 In combination with an elevator drawhead, alining, pivoted levers carried by the drawhead, an adjustable spring connection 115 for the outer end of said levers and the ele vator drawhead, and means connecting the inner ends of said alining levers.

8. In combination with an elevator drawhead, alining, pivoted levers carried by the 120 drawhead, an adjustable spring connection for the outer end of said levers and the elevator drawhead, and cable-securing links connecting the inner ends of said alining levers.

In testimony whereof I aflix my signature.

FREDERICK E. TURNER.

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