US1626861A - Adjustable pulley-block hanger - Google Patents

Description

May 3,1927. 1,626,661

H. MURRAY ADJUsTABLE PULLEY BLOCK HANGER Filed March 15. 1926" v.- 2O /3 Z7 ,6 /4 /8 33 22. INVENTOR. l HARRY NUR/PAY ATTORNEYS.

Patented May 3, 1927.

UNITED STATES HARRY MURRAY, OF ROSS, CALIFORNIA.

ADJUSTABLE PULLEY-BLOCK HANGER.

Application led March 13, 1928. Serial No. 34,435.`

This invention relates to an adjustable pulley block hanger particularly adapted for use with booms in lifting heavy loads. Such a device is most commonly used in loading fr and unloading freight and cargoes from flat cars and ships.

In the apparatus now in use for unloading ships, a pulley block is loosely secured to the lower end of the mast adjacent the connection of the boom pole therewith. The lifting cable extends through this pulley and along the pole to a pulley on the end thereof. This pulley block being loosely mounted, freely Hops around in every direction during operation, and the block and pulley thereby become considerably worn within a very short time. It is the primary object lll of my invention to provide an improvedv pulley block hanger which may be adjusted to a desired position and which will normally remain in such position, but be free to move to other positions to accommodate the pull of the load thereon. Such an .improved block hanger avoids the objections of the loose pulley block heretofore used, while at the same time providingr all the :freedom necessary to the use of the block.

In the accompanying drawing I have illustrated one specific embodiment of my 30 invention, but it will be understood that the invention can be otherwise embodied and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

Referring to the figures of the drawing: Figure 1 is a perspective view of a mast and mechanism cooperating therewith for lifting cargoes to and from ships, the use of my present invention being illustrated therein.

Figure 2 is a side elevation of my improved pulley block hanger..

Figure 3 is a bottom plan view thereof partially in section. In the drawings, 1 indicates the mast of a ship and 2 a pair of boom poles cooperating therewith. The inner ends of these poles are pivo-tally connected to the mast and the outer ends carry pulleys 3. Lifting cables Athaving a cargo engaging hook l5 thereon extend over the pulleys 3 and downwardly around pulleys 6 and from thence over a pair of power driven drums 7. As has been above described, the pulley blocks heretofore use-d in this lifting mechanism have beenloosely connected to the lower end of the mast, ordinarily by a chain extending around the mast,.the pulley thereby being free to liop in every direction. My invention, as illustrated in Figs. 2 and 3, comprises an improved pulley block hanger adapted to be `secured to the mast and normally maintain a fixed position while being free to move sufficiently to accommodate the lifting loads thereon.

My improved pulley block hanger 6 com- `prises a base havingV a foot 8 adapted' to be rigidly secured to the mast and carrying an outwardly extending projection 9 having a hole 10 vertically therethrough. A member' 1l has a yoke 12 at one end engagingV over to the shank comprises a pair` of parallel` `plates or bars 2O integrally connected at their forward ends where they engage the shank, and extending rearwardly through the pulley block and connected at their rear ends by a bolt 21. A bolt 22 extends through the pulley block, the plates 20, and forms the axle for the pulley 23.

It will be noted that the inner lower end of the member 15 is formed into a shoulder 24 and a wedge 25 is adapted to slide between this shoulder and the face 26 of the member 11. The outer end of this wedge is swivelly connected to an adjusting nut 27, threaded to a stud 28, rigidly carried by the member 11. The wedge can be adjusted longitudinally by rotating the nut 27.

It is believed that the use and advantages of my invention will be obvious. The base 8 is rigidly secured to the mast by bolts or otherwise, and the remaining parts are mounted on the base as above described.

The wedge can then be adjusted to hold the i pulley block up to any elevation desired,

power pull, but is prevent-ed from free flopping movement and from dropping downward by gravity as does the ordinary block now in use. The usual wear on all the connected parts and on the sides of the pulley, due to this free Hopping` movement, is .thereby prevented.

Having` thus described my invention, what I claim is:

l. A pulley .block and hanger, comprising in combination with a base adapted to be rigidly secured to a support, a member pivoted for horinontagl movement thereon, a second .member pivoted for vertical movement on the firs-t member, a pulley'swivelly carried by the second member, and a stop member interposed between the first and second members to hold the second member and pulley in various positions of elevation with `relation to the 'irst member while permit- .ting a tree movement thereof upwardly from such positions.

2. A pulley block and hanger, comprising in combination with a base Aadapted to lbe .rigidly secured to asupport, a member pivotecl for horizontal movement thereon, a second member pivoted for vertical movement on the irst member, a pulley swivelly carried by the second member, land an adjustable stop member interposed between the first Aand secon-d members to hold the second member and pulley in various positions of yelevation with relation to the first .member while permitting` a free movement thereof upwardly from ksuoli positions.

3. A .pulley block and henger, comprising the combination of al bas-e adapted to be rigidly secured to a support, a member pivoted for horizontal movement thereon, a. member pivoted for vertical movement on the [irst member, a` pulley swivelly carried by the second member, a wedge carried by the lirst member and engaging the second member to hold the. same in elevated position about its pivot, and means carried by the first member for adjusting the wedgefto vary the ,elevated position of the second member and pulley.

l. A pulley block and hanger, comprising the combination of a base adapted to be rigidly secured to a support, ,a member pirotally carried thereby, a. Apulley swivelly carried 4by the member, a wedge for holding the member in elevated position `about its pivot, and screw-threaded means for ad justing .the wedge to vary the ,elevated position of the member and pulley.

5. A pulley block and hanger, comprising` a base adapted to be rigidly secured ,to a support, a member pivoted for horizontal movement thereon, ,a second member pivoted for vertical movement on the first member, a` pulley journalled in the second member, and adjustable means interposed between the lirst and second members whereby Athe second member and the pulley journalled .thereon may be `held in various positions of elevation with relation to the firstnamed .member while permitting free movement off the second member and the pulley upwardly from such positions.

HARRY MURRAY.

Images