US203744A - Improvement in combined clutch and brake of hoisting-drums for elevators - Google Patents

Description

J.. s. tLANE. Combined Clutch and Brake of Hoisting- Dlu'mfor` Elevators, 1&0.

` riillllillllllllll Ny PETERS, PAIUTJ-LHPOGRAPHER, WASHINGTON. D, C.

Parana' J ULIUS S.` LANE, OF AKRON, OHIO.

IMPROVEMENT IN COMBINED CLUTCH AND RAKE 0F HOISTING-DRUMS FOR ELEVATORS, dc.

Specification forming part of Letters Patent No. :203,744, dated May 14, 1878 application filed April 1, 1ers.

To all whom it may concern:

y Be it known'that I, JULIUS S. LANE, of

Akron, iu the county of Summit and State of Ohio, have invented a new and Improved Hoisting-Machine, of which the following is a specification:

The invention relates to hoisting machinery for mines, elevators, mills, Ste., which is moved or stopped at will b being connected with or disengaged from moving mechanism, and arrested at any desired point by a friction band- 1 4 is objectionable, in that it not only causes the friction of two shafts, but, if friction-wheels are used to drive the drum, this is greatly increased in the journal-bearings of the shafts. It occupies as much more space as is necessary for the counter-shaft, and requires great power to operate it, as either the drum-shaft or counter-shaft must be moved toward the other to bring the friction-wheels into contact. The second part of the foregoing arrangement is objectionable, for the reason that it is desirable to have the brake operate the moment the drum, by being disengaged from the moving machinery, ceases to revolve, which is almost impossible if the two results are to be produced by two distinct, independent, .and consecutive operations; while the objection to the third part of the foregoing arrangement is 'found in the fact that, being drawn at each end, the band-brake is against the motion of the brake-pulley, thereby requiring great outlay of power to set the brake.

Heretofore, also, in the construction of the winding-drum, it has been customary to connect and brace the two heads upon which the outer casing is placed by a series of rods passing diagonally from the rim of each head to that of the other; butthis arrangement affords "no adequate 5 upon the drum, which tends to rack it.

l j The objects I seek .to attain by my invention `are simplicity tion; reduction of friction, number of bearing-surfaces; safety of operation; the avoiding of all shock at one end drawn i provision for -a twisting strain and compactness in` construcby lessening the ease, facility, and

in starting and stopping the drum, and the prevention of racking the drum. by twisting strains.

The invention consists in having the driving-power applied directly to the drum-shaft, and in communicating it thence tothe drum by a band-clutch the combination ofthe bandclutch and band-brake, arranged to be operated by a single hand-wheel or by two handwheels, at pleasure; a differential device for 'taking up `wear of the driving' and brake lbands; and a device for holding the bandclutch from contact with its pulleywhen not turning the drum.

It also consists in the manner of connecting the heads npon which the drum-casing is placed; and it iinally consists in the particular construction and arrangement of the various parts.

In the accompanying drawing, in which similar letters of reference indicate like parts,

Figure l is a perspective of my :improved` hoisting-machine. Fig. 3 is an end elevation of the drum with driving and brake mechanisln; Fig. 2, `a longitudinal section of Fig. 3 at the line a' x,- Fig. 4, a vertical central section of l the haudwheels, shafts, and posts, enlarged; and Fig. 5, a plan view of the two hand-Wheels, enlarged, exhibiting the differential connection.

Journaled insuitable boxes in the frame A is the shaft B, which supports the drum and its connections, and to which the drivingpower is directly applied. I

Upon this shaft is fitted the winding-drum C, arranged to revolve freely thereon. drum consists of two heads, D D', upon the peripheries of which is bolted the wood casing E. The hubs of these heads, which are fitted to freely revolve on the shaft B, are prolonged inwardly, terminating in anges d df..

Interposed between the heads is a hollowV cylinder, F, having an inside diameter exceeding the diameter of the shaft B, also terminatunica.

This

ing in flanges corresponding with the anges pulleys, connected at one edge with the disk D".

H' is a band-brake surrounding the pulley Gr', and H is a similar driving-band surround.- ing the pulley G. These bands consist of me- 'tal-lic belts lined with bent wood, with the grain lengthwise of the belt.

The driving-band H is, at one end, attach ed to the xed bar I through a screw-coupling, by which it can be adjusted, and at the other to the pivoted lever I'.

Upon the frame A is bolted the hollow post J, to lugs on which is anchored one end of the band-brake H', the other end being attached to the nut K, in which fits the screw L, hereinafter referred to.

A disk, M, slightly separated from the disk D", is keyed to and revolves with the shaft B, the hub whereof is prolonged on the side opposite the disk D". This hub is turned smoothly, and upon it slides ,the collar N, which is moved toward and from the disk M by the pivoted forked lever O. To this disk is rigidly attached the bar I, and the lever I' is pivoted therein under the plate I.

A link, Q, connects the lever I with the collar N, and at its points of connection with those parts 'small steel rollers t are placed at each side of it on the pins upon which the link turns, which serve to :remove friction between the link and the disk M and collar N, respectively.

Within the hollow post J is fitted a hollow shaft, R, attached at the upper end to the handwheel S, and having upon its lower end a pinion, T. This pinion meshes into the rack U, which is hinged to and serves to move the lever O.

Within the shaft It is a solid shaft, V, attached at its upper end to the hand-wheel S', and having upon its lower end a` screw-thread, L, which fits the nut K, and the hand-wheels S S' are caused to revolve together by a pin, c, passing through coincident holes in each.

To start the drum, the 'brake H' being s et, the drum at rest, and the shaft B revolving, the hand-wheel S is turned so as, by means of the pinion T, rack U, and lever O, to cause the collar N to slide toward the disk M. This,

through the link Q, swings the end of the le-v ver I' from the center of the disk, thereby drawing the driving-band H tight about the pulley G, and causing the drum to revolve with the shaft B.

The same operation turns the screw L in the nut K, thereby slacking the band-brake H';

and it is obvious that by reversing the operation the opposite resultsuwill be secured.

By this arrangement, also, the drum is started and arrested gradually, and all shock to the machinery avoided.

It is obvious, also, th at the drivin g-band and brake-band may be operated independently, if desired, by removing the locking-pin c. y

To enable the wheels S S' to be locked together at any desired point in adjusting for wear or'otherwise, said wheels are pierced iu coincident circles with a number of holes, equidistant from each other, the .number of holes in one wheel exceeding by one the number in the other, as indicated in Iiigm, wherein dotted lines indicatethe position of the holes in the lower wheel, by which arrangement but slight movement is required in one wheel to find coincident holes for the locking-pin c.

To prevent contact between the band H and pulley G when the latter is at rest, I employ two or more rods, a a, provided with adjustable screws, attached to the band H, and passing through suitable guides toward the center of the disk M.

A corresponding number of wedge-shaped projections, c e, are attached to the inner end of the collar N, which, as the collar is thrown outward to slacken the band H, engage the ends of the rods a. a, thereby forcing them outward and raising the band H from contact with the pulley Gr.

I am aware th. t a driving-band is not new, as the same is shown in a patent to Adolph and Felix Brown, and such I do not broadly claim 5 but l. In a hoisting-machine, the combination of a band-brake and a drivin g-band, both operated by one hand wheel, substantially as herein shown.

2. In a hoisting-machine, the combination of a band-brake with a drivin g-band, each operated by an independent hand-wheel, said wheels being adapted to be connected and operated by one motion7 substantially as and for the purpose hereinbefore set forth.

3. The combination, in a hoisting-machine, of a hand-wheel for operating the drivingband with a hand wheel for operating the brakeband, adapted to be operated together,

and with a differential device for locking them together, substantially as and for the purpose hereinbefore set forth.

4. In combination with the driving-band of a A hoisting-machine, a series of radial arms, attached at one end to the driving-band, and arranged by encountering inclined surfaces at the other to raise the band from contact with the surface of the band-pulley, substantially as shown, for the purpose specified.

5. In combination with the drum-heads D D', the flanged cylinder I?, substantially as and for the purpose specified.

JULIUS S. LANE.

Witnesses:

C. l). HUMPHREY, JOHN MEMMEN.

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