US1670215A

US1670215A - Block and tackle

Info

Publication number: US1670215A
Application number: US90859A
Authority: US
Inventors: Albert B Rutland
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-02-26
Filing date: 1926-02-26
Publication date: 1928-05-15
Anticipated expiration: 1945-05-15

Description

May 15,-1928. 1,670,215

A. B. RUTLAND BLOCK AND TACKLE Filed Feb. 26, 1926 2 Sheets-Sheet 1 ll /4 I, I i C) k 9 E I V I INVENTOR wrrmsss- W M ATTORNEY May 15, 1928. 1,670,215

1 A. B. RUTLAND I BLOCK AND TACKLE Filed Feb; 26, 1926 2 Sheets-Sheet 2 4/54/71 2 EJ/z/ INVENTOR ion-Iranstares PATE T"mm,

Patented May 15, 1928.

ALBERT 13. annual), or coco SOLO, CANAL zonn.

BLOCK AND (TACKLE.

Application filed February 26, 1926. Serial No. 90,859.

This invention relates to blocks and tackle, and more particularly to a manner of arranging and supporting a plurality or group of pulleys, whereby objects or weight may be lifted with a minimum of power.

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawing, the invention residing in the construction, combination v and arrangement of parts as claimed. 7 a

In the drawings forming part of this application, like numerals of reference indicate similar parts in the several views, and wherein:

Figure 1 is a view of a plurality of pulleys supported on one type of frame.

Figure 2 is a diagrammatic View showing how the cable is trained over the various pulleys.

Figure 3 is an elevation partly in section, illustrating a modification.

Figure 4 is an elevation illustrating a still further modification.

Referring to the drawings, and particularly Figures 1 and 2, 10 indicates generally the frame upon which a plurality'of pulleys are supported, the frame being strengthened by bracing elements 11. Supported by the ends of this frame 10 is a cross bar 12 from which is suspended spaced blocks 13, each of which has journaled therein a plurality of pulleys 14. The blocks are suspended from the bar by apertured lugs 15, and surrounding this bar are sleeves 16 which engage said lugs and hold the blocks from movement longitudinally of thebar. Depending from the blocks are apertured lugs 17 which are connected by a bar 18 arranged parallel with the bar 12, and surrounding the bar 18 is a sleeve 19 which contacts the lugs 17 and holdsthe block against movement. It is, of

7 course, to be understood that there are two of the frames 10 used with the cable shown in Figure 2, the lower frame (not shown) being arranged in a position just the reverse from that shown in Figure 1. The cable 20 is then trained over the pulleys of the respectivegroups in the manner clearly shown in F igurev2, wherein it will be noted that one end of the cable is trained over the pulley 21 of one of the lower pairs of pulleys, and then extended upwardly over the pulley 22 arranged diagonally opposite the pulley 21, thence downwardly over the pulley 23, and thence over the pulley 24c arranged diagonally opposite the pulley 23;

' the cable is then continued downwardly over the other pulley of the pair 23 and thence upwardly over the other pulley of the pair 22, and thence downwardly over the other pulley of the pair 21, and finally over the remaining pulley of the pair 24:. By'reason of this construction and arrangement, ob j ects or weight can be lifted with a minimum of power, and with considerablyless power than block and tackle constructions with which I am familiar.

In Figure 3 the cross frame 50 is centrally formed at its top with a substantially V- rod of metal. casting and has its ends reduced 1 and threaded, as at 54. The reduced ends support thereon the eye portions 55 of blocks 56, the said eyes 55 being contacted by washers 57 which in turn are contacted by nuts 58 which are screwed on the said ends 54.

a depending hook 59.which.may be engaged by the eye of another block 56. r

In Figure 4 the construction issubstan tially similar to that disclosed by Figure 3, the frame 60 having revolubly supported on its reduced ends blocks 61, the said frame having its bottom portion centrally formed with depending'ears 62 between which there is received theeye of a block 63, and pass ing through the ears 62 and the eye in the block 63 there is a bolt member 6 1 which is engaged by a nut 65.

While it is believed that from the foregoing description the nature and advantages of the invention willbe readily apparent, I de- The frame 50 is also centrally formed with myself to what is herein shown and de- I scribed, and that such changes may be resorted to when desired as fall-within the scope of what is claimed.

Having thus described the invention, what is claimed as new, is

A device of the class described comprising two pairs of upper pulleys spaced apart,

two pairs of lower pulleys spaced apart and a cable adaptedto have one end fastened to a support and passed overa lower pulley of the right hand pair, then'upwardly over an hand pair, then upwardly over an upper' pulley of the right hand pair, then down- 5 wardly over the second pulley of the lower left hand pair, then upwardly over the sec- :ond pulley of the upper left hand pair, then downwardly over the second pulley of the lower right hand pair and'the'n upwardly over the second pulley of the upper right 10 hand pair.

In testimony Whereof'I afiix my signature;

ALBERT BQRUTLAND.