US1529939A - Hoisting apparatus - Google Patents

Description

A. C. WHITTEMORE ET AL March 17 1925.

HOISTING APPARATUS Filed July 24, 1920 Jim/e226 ors.

Patented Mar. 17, 1925.

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AMOS o. wiirr'rEMon-n AND BENJAMIN B. BURNETT, or LoMroo, CALIFORNIA.

HOISTING Arrnarrros.

Application filed July 24,

T all whom it may concern:

Be it known that we, Amos 0. Nnirr'rn- MORE and BENJAMIN B. BURNETT, both of Lompoc, in the county of Santa Barbara and State of California, have jointly invented certain new and useful Improvements in a Hoisting Apparatus, of which the following is a specification.

The present invention relates in general to a hoisting apparatus and has reference more particularly to a portable apparatus for use in warehouses and the like.

The primary object of the invention to provide an apparatus whereby relatively heavy materials may be conveniently handled in moving and elevating them. The apparatus is particularly adapted for use in handling sacks of flour grain and the like, especially stacking them one upon the other.

The accompanying drawing illustrates one form of reducing the invention to practicein which Fig. 1 is a side elevation of one side of the apparatus. Fig. 2 is a side elevation of the opposite side of the apparatus; and Fig. 3 is a detail plan view of the driving and braking elements for the cable drum.

Referring now to the drawing in detail it is proposed to render the device portable so that it may be moved from one location to another, for instance, in warehouses, factories, mills or the like, to which end the supporting base 1 is provided with rollers 2, one of which being arranged at one end of the base and mounted thereto with a swivel connection 3, so that the same may act as a guide roller. When the apparatus is in use, chocks or blocks 4 may be used for maintaining the same in fixed position.

Mounted upon the base 1 is a power medium which consists preferably of a single cylinder internal combustion engine 5 having a crank shaft 6 upon which the fly wheel 7 is mounted with a driving element represented by the wheel 8 also mounted upon the crank shaft 6 and adapted to be driven thereby. Mounted upon the opposite end of the base 1 is the hoisting apparatus per se which consists of one or more standards 9 braced by one or more diagonal rods 10 connected to the standard or standards and the engine bed. Other braces may be arranged as at 11 to add rigidity to the structure.

Supported by the standard or standards 1820. Serial R0. 398,648.

9 is a cable suspension which consists preferably of a vertically disposed post 12 sup-,

ported upon the base 1 and adapted to telescope within the post 13 which post carries at itstop a horizontal.pulley mounting 14 which is braced to the post as at 15,, and made to confine twoor more pulleys 16 over which the cable 17 is guided with its free end 18 terminating in a connection 19 for the grappling device 20. The cable 17 is wound upon the cable drum 21 which is supported adjacent the'engine by the stands ards 22 and These standards are con-v structed with suitable bearings 25 for confining the shaft 26 of the cable drum so that the same is mounted with freedom of rotation. Coaxially mounted upon the shaft 26 with respect to the cable drum is a driven element consisting of a friction wheel 27 Which is of larger diameter than the cable drum and adapted to contact with the driving element 8, for rotating the cable drum in winding the cable thereon. In order to effect a driving connection between the driving element Sand the driven element 27, standard 22 is mounted to the base 1 with freedom of a slight tilting movementso that the driven element 27 may be moved toward and away from the driving element 8. The bearing 25 on the standard 22 is of a size to act as a pivotal mounting for the shaft 26 so that its opposite end which carries the driven element may be moved in a horizontal plane.

Positioned on the opposite side of the driven element from that of the driving element is a permanently fixed brake 28 comprising a relatively large block having an are shaped cut-away portion to receive the driven element when the same is moved in frictional contact therewith for arresting the cable drum and maintaining the grappling device 20 in any desired elevating position.

To conveniently effect the desired move-1 ment of the driven element 27 to driving relation relative to the driving element 8 or to move the same in contact with the brake 28 or to permit same to assume a neutral position between these two parts,

so that the weight of the grappling device 20 may operate to unwind the cable from the drum and return the grapple to a lowered position where it may be, caused to engage a sack of material, it is proposed to provide a control comprising a hand lever 29, horizontally positioned upon a vertical rod.30 and adapted to rotate the same and through it the cam 30 against which the end of the rod 31 bears. The rod is held against this cam by the spring 32 pressing at one end against the support 32 and at the other end against a collar 32 on the rod 31. The opposite end of the rod 31 is fixed to the bearing 25 and the spring hold the driven element 27 against the brake 28. By turning the lever 29 in one direction, the cam 30 Will impart a push to the 'rod' Sl and thus move the driven element against the driving element 8 so that a I drive may be imparted to the axle and will normally sired Without departing from the principle involved. v

In using the apparatus for elevating sacks or in any other capacityin fact when it becomes necessary to elevate the sacks at a greater height, the telescoping feature of the posts 12 and 13 may be resorted to,

to raise the cable suspension.

' 33 represents a suitable Water reservoir for the engine. The fuel may be supplied from any suitable source.

From the above it will be seenthat the apparatus will offer a saving lll-lfllJOI', that y it is simple in construction and operation, and capable of being operated in eompara tively restricted areas. Then, again, its portability is also anadded feature.

We claim:

In a portable hoist of the character described having a platform, a telescopic mast carrying a crown sheave, said mast comprising an inner lower mast member secured to the platform and an. outer upper tubular mast member telescoping thereover and slidably supported intermediate its ends.

AMOS o; WHITTEMoRE. BENJAMIN B. BURNETT.

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