US1393723A - Pulley - Google Patents

Description

A. W. L. SCHERMULY.

PULLEY.

APPLICATIDN FILED JUNE H. 1920.

Patented Oct. 11, 1921.

I ED TATES PATENT OFFICE.

rUfLLEY.

Specification of Letters Patent.

Patented Oct. 11. 1921.

Application filed June 11, 1920. Serial No. 388,311.

(GRANTED UNDER THE PROVISIONS OF THE ACT-01" MAfi-CH 3, 1921, 41 STAT. L., 1313.)

To all whom it may concern:

Be it known that I, AUGUSTUS VVILLIAM LoUis SoHERMULY, a sub'ect of the King of England, residing at tonecroft, Stone Cot Hill, Sutton, in the county of Surrey, England, have invented a new and useful Pulley, (for which I have filed application for patent in Great Britain November 5, 1915, Pat. No. 15595/15, sealed September 27, 1916,) of which the following is a specification. W

This invention has for its object to provide pulleys which can be very readily and quickly attached to, and detached from, an chorages, such, for instance, as ropes, secured at both ends, without need for detaching such ends, and which are strengthened by the ropes to which they are thus attached.

According to this invention the pulley block is provided with hooks, eyes, or the like, so disposed that, when the rope to which the pulley is attached is engaged with the said hooks, eyes, or the like, a portion of the said rope will lie along one side of the pulley block and extend over, or partly over, the ends thereof so that the said portion of the rope will help to support and strengthen the parts of the block over which it passes. In the case of snatch blocks (that is blocks of the kind hereinafter described with reference to the accompanying drawing having an opening in one side for the entry of the bight of the rope to pass over the sheave) this strengthcning effect is of special utility as the side of the block in which is the opening is weakened by the said opening and the rope attached to the block as aforesaid greatly strengthens that side. When the pulley is to be attached to an anchorage rope which is secured at both ends, the devices by which it is attached to the said rope will be in the form of hooks. or the equivalents of hooks, but when the pulley is to be secured at. or near. the end of an anchorage rope, or to an anchorage rope with a free end which can he passed through the devices. they may be in the form of eyes, or the equivalents. The said hooks, or eyes, or like devices, may be secured to, or formed in or with, the block in any suitable way, but generally it is preferable to allow of their having some play, longitudinally, and for this purpose they may be formed on, or carried by, a bar, or slider, connected to the block in such a way as to allow of some little longitudinal movement of the said bar, or slider, to cause a good bearing of the anchorage rope against the block.

I will describe, with reference to the accompanying drawing, a construction in accordance with this invention.

Figures 1 and 2 are elevations at right angles to each other showing a snatch block provided with hooks in accordance with this invention and secured to the mid part of a rope. A is the block and B is the sheave. The bar, C, formed at each end with a hook 0, 0 is secured to the block A, by a strap-piece D, constituting a slide for the bar C, and fixed by the screws d, the bar C, being of a length such that it has a little longitudinal play in the slide D. The rope E, to which the pulley is to be attached is passed into the hooks as illustrated, a portion 6 lying along one side of the block A, crossing the opening a, and extending at 6 6 over the ends of the block as aforesaid.

It is to be understood that the invention is not limited to application to pulleys of the particular kind illustrated, as it may be applied to other forms of pulleys with one, or with more than one, sheave. and the said pulleys can be used in any position on ropes and in any arrangement of ropes to which they may be applicable.

What I claim is 1. A pulley block having associated therewith rope-engaging means adapted to engage the opposite ends of a supporting-rope liight, within which one side and at least a portion of the opposite ends of the block are embraced.

2. A pulley block having a sheave and a lateral opening to the sheave space, in combination with rope-engaging means associated with the block and having means to engage the opposite ends of a supportingrope bight, within which the open side and at least a portion of the opposite ends of the block are embraced.

3. A pulley block having associated therewith rope-engaging means adapted to engage the opposite ends of a supporting-rope bight. within which one side and at least a portion of the opposite ends of the block are embraced, saitl rope-engaging means being connected to the block with limited freedoiii of longitudinal play.

4. A pulley block and an associated bar at one side thereof having at its opposite ends means for engaging the opposite ends of a supportingiopc bight embracing the opposite SlIiQ and at least a portion of the opposite ends of the block.

5. A pulley block having a sheave and a lateral opening to the sheave space, in com bination with an associated bar at the opposite side of the block from said lateral "Pa ne wei h ends e en s of a 15 nieans for engaging the oppbsi supportingmope l ght embracing at least a portion (ift lie'bpfi3siE ends of the block and the side with lateral opening to the sheave space.

In testimony whereof I have signed my 20 name to this specification in the presence of Enwn. GEO. DAVIES.

GHERMULY.

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