US1339931A - Pulley-block - Google Patents

Description

' WITNESSES L 0. LEVIN. PULLEY BLOCK.

APPLICATION FILED SEPT. H, 1918- 1,339,931, Patented May 11',1920

INYENTOR.

ATTORNEY.

UNITED STATES PATENT OFFICE.

NILS D. LEVIN, or COLUMBUS, 01110, ASSIGNOR To'rHE anirrnnr MAN FAoTnRIne COMPANY, or COLUMBUS, OHIO, A oonronarron or oHIO.

PULLEY-BLOGK.

Application filed September 11, 1918.

To (ZZZ whom it may concern:

Be it known that I, Nine D. LEVI-N, a citizen of the United States, residing at Golumbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Pulley-Blocks, of

which the following is a specification, reference being had therein to the accompanying scribed which may be securely attached to a machine frame or similar structure at points where it may be desirable to apply the draft of a rope or similar flexible draft member, and which may be conveniently removed when such attachment becomes no longer desirable.

The devices by which I attain this object are fully set forth in the following specification reference being had to the accompanying drawings of which Figure 1 is a plan new of the preferred embodiment of my invention 1n working relation with the feed rope and frame of a mining machine, or similar device.

Fig. 2 is a view of the device illustrated in Fig. 1 with the frame part in position to permit engagement of the feed rope preparatory to attachment to the machlne frame.

Fig. 3 is a section along the line 3--3 of Fig. 1.

Fig. 1 is a fragmentary view of the frame of a mining machine adapted to the attachment of my improved pulley block.

Figs. 5, 6 and 7 are diagrammatic figures illustrating the use of my invention.

Like numerals refer to similar parts in the several figures.

In Figs. 5, 6 and 7 of the drawings I have, for the purpose of illustrating the application of my improved pulley block, diagrammatically illustrated a well known mining and loading machine wherein the operative parts are mounted upon a sub base 1 adapted to rest upon and slide in any direction over the floor of the mine.

' This machine is provided with feeding mechanism comprising a feed rope 2 which Specification of Zetters Patent.

Patented May 11, 1920 Serial No. 253,634.

is arranged to be connected to a suitably placed anchor jack 3 to move the machine bodily over the floor of the mine. Suitable guide sheaves 1 are permanently mounted upon the rear end of the sub base 1 and over these the feed rope may be led from the tensioning device upon the mining machine to'either side of the sub base. In Fig. 51. have shown the arrangement of the feed rope 2 and anohorjack 3 to move the rear end o'f 'the machine-to the right. It is apparent that when the entire machine is to be moved laterally the strain of the feed rope must be applied at a point in the line betweenthe anchor jack and the center of gravity of the machine as illustrated in Fig. 6, and if the forward end of' the machine is to be moved such strain must be applied near the forward end of the frame as shown in Fig. 7. If guide sheaves such as are shown at 5 and 6 were permanently attached to theframe of the machine'at all of the points at which it might be desirable to apply such strain, they wouln seriously interfere with the operation of the machine near the side walls of the mine.

To avoid such interference I have provided my improved detachable pulley block comprising a sheave Wheel 7 having its circumferential groove 8 adapted -to engage the feed rope 2 of such a mining machine or a similar draft member. The sheave wheel 7 is journaled upon a short shaft 9 mounted in" apertures of two supporting brackets 10 and 11 which are held in working relation with said sheave wheel by the head 12 formed at one end of the shaft 9 and by a collar 13 secured at its other end .by a suitable cotter pin 14. The brackets 10 and 11 are each independently rotatable about the shaft 9 and each is provided with '7 an inwardly extending flange 15 and 16 adapted to meet along the central longitudinal plane of the sheave wheel 7. The flanges 15 and 16 extend rearwardly from and at right angles to the longitudinal central plane of the frame member 18 and to engage its inner surface to prevent movement of the pulley block away from said frame member. A cylindrical stud 22 formed of companion semi cylindrical projections at the rear end of the flanges 15 and 16 is arranged toens gage a second aperture 23 in the frame member 18 to prevent movement of the pulley gether and the stud 19 is inserted in the aperture 20 of the frame member 18. By a rear.- ward rocking movement of the brackets '10 and 11 upon the forward ends ofthe flanges 15 and 16 the hooks 21 may be brought into contact with the inner surface of the frame member 18, and the stud 22 inserted in the aperture 23. Tensionupon the feed rope 2 in the directions ofthe arrows in Fig. 1 tend to produce rotation of the parts about the, hook 21 which holds the surface 17 in contact with the frame member 18; The

hooks '21 resist the outward strain of the feed rope 2 and the stud 22 resists its rear,- ward straln thereby maintaining the desired relation of the sheave wheel 7 to the frame of the machine. After the strain upon the rope 2 has been relieved the brackets 10 and 11 may be rocked forward to release the lugs 22 from the aperture 23 after which the hook 21 may be withdrawn from the aperture 20. While I have illustrated and described my invention with especial reference to its application to a mining machine I do not limit myselfto such an application or the precise details of construction here shown as it is apparent that these devices may be subject to wide modification without departure from the spirit of my invention.

hat I claim is The herein described detachable pulley support formed in two similar halves, each half having a wide base plate, formed with a straightflat surface 17, adapted to bear against a base surface and having two hook h alves 19, adapted, when registering, ,to form asingle hook, and two pin halves 22, adapt ed to form a single pin to enter the base element, the pulley being mounted in the outer ends of said plates and held rigidly. against displacement, in any direction 'when the strain is on the cable.

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

NILS D. LEVIN.

lVitnesses HARRY C. DEAN, ANNA M. FENLoN.

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