US115450A

US115450A - Improvement in tackle-blocks

Info

Publication number: US115450A
Authority: US
Publication date: 1871-05-30
Anticipated expiration: 1888-05-30

Description

l ELLBS 00w.

iimprovem'ent in Tackie-B'locks Na. 115,450fl Patented May 30,1871.

W/WESSGS'L their revolutions in equal times.

PATENT QFFIGE.

ELLIS DOTY, OF JANESVILLE, WISCONSIN.

IMPROVEMENT m TACKLE-BLOCKS.

Specification forming part of Letters Patent No. 115,450, dated May 30, 1871.

To all whom it may concern.-

- Be it known that I, ELLIs DUTY, of Janesville, in the county o'fItock and State of Wisconsin, have invented anew and valuable Improvement in Tackle-Blocks; and I do hereby declare that .the following is a full, clear, andexact description of theconst-ruction andoperation of the same, reference being had to the annexed drawing making apart of this specification,and to the letters and figures of reference marked thereon.

Figure 1 ofthe drawing is a perspective view of my invention, showing its application. Fig. 2 is a central vertical longitudinal section.

My inventionhas r'elation'to an improvement in the construction of tackle-blocks,

whereby all the advantages of separate wheels are derived without the unnecessary friction of the faces of the hubs against each other;

' and it consists in providing one of the wheels of the block with an elongated hub or sleeve, upon which the other wheels rotate, all the wheels being graduated to make their revolutions in equal time.

The letter A of the. drawing designates the frame or body of the tackle-block, within which the wheels are situated. B represents the axle secured to the walls of the block. The fixed axle isfpreferred to the shaft journaled in bearingsin the walls of the frame A, because,.by the use of the sleeve-hub hereinafter described,

the bearing is distributed evenly over a greater surface. 0 G OQdesignate the wheels of the-block, which are so graduated in diameter with respect to each other and with respect to I the wheels of the lower or pendent tackle that,

when therope or cord is properly reeved and attached, the wheels of each block will make Either of r the wheels of the tackle-block maybe provided with the elongated sleeve d. For convenience in oiling and other advantages thereby attained, I prefer attaching this sleeve to the middle wheel. The ends ofthe sleeve extend outward on either side, and are brought in contact with the walls of the block or frame against which they rotate. The other wheels of the tackle are slipped on the sleeve (1, and r will make their revolutions in equal times, and there will be no friction between them, either.

on the sleeve or when the faces of the hubs come in contact; but, in practice, it is not feasibleto use rope of the character above described. Itis never homogeneous, and always furnishedmore or less with excrescences and inequalities.

The mode herein described of constructing the tackle-block is designed to approximate, ,as nearly as the inequalities of the rope will admit, equality in the time of the revolutions of the wheels while at the same time-the i11- dependent movement of each wheel is permitted, and the bearing of each of the wheelsis distributed over the entire shaft of the pulleyblock.

I claim as my invention- 1. In a tackle-block, the independent wheels 0 G U", graduated to make their, revolutions in equal times, substantially as specified.

2. In a tackle-block, a wheel provided with an extended hub to serve as a bearing for the other wheels of the block, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

ELLIS DOTY. Witnesses:

D. D. KANE,- I B. (JURTIs. I