US1768894A - Return block - Google Patents

Description

w. DUBERVILL .July l, 1930.

RETURN Locx Filed July 27, 1929 INVENTOR.A

Patentes July 1, leso freut,

FFI-ca WELLINGTON, DUBERVILL, or nnss/giur, mano RETURN BLOCK Applicationl led July 27,

My invention relates to lreturnblocks and more particularly to a block that is used to return the rope on a hay fork when hay is drawn into the mow by horse power. Cer tain objects of the invention are to provide spring means for causing the return of the rope together withadjustable and fric tional means for the sheaves or pulleys whereby they are adapted to fit and engage ropes of different sizes. Y

With the above and other objects in View which will appear as the description proceeds, the invention consists of the novel construction, adaptation, combination and arrangement of parts hereinafter described and claimed. These objects vare accomplished by devices illustrated in the accompanying drawings, wherein Figure l is a view in side elevation of the return block;

Fig. 2 is a top plan view of the same; Fig. 3 is a vi-ew in transverse vertical section taken substantially on a broken line 3,

` parts, the numeral 5 indicates the main frame casing which is open at its lower end and contracted at its'upper end to form shoulders 6 and a lloop 7 for the insertion of fastening means for securing the device to a fixed object as will be understood.

A. sheave or pulley 8 is keyed to a shaft'9 whose ends are journaled through the lower side portions of the casing 5, and a sheave 10 keyed to a shaft 11 is mounted in the upper portion of saidcasing. Said sheaves are provided with tires 12 that are made of rubber or other flexible material for'the purpose of increasing their frictionalengagement with a rope 13 as clearly shownin the drawings. Y

The end portions of the shaft 11 are slidvably mounted n corresponding slots 14 pro- 1929. Serial N0. 381,429.

vided in the sides of the casing 5. Eyebolts 15 have their eye ends passed over said shaft and their'threaded ends passing through the shoulders 6 of the casing; Jamnuts 16 for said bolts bear against the exterior sides of said shoulders and slotted brackets 17 secured to the loop 7 bear against said jam nuts. Referring to Fig.- 3 of the drawings, it will be obvious that engagement of thel rope 13 between the sheaves 8 and l() may be increased or .decreased by manipulating the jam nuts 16. The bolts 15 which support the axle l1 are ordinarily used to increase the frictional engagement of said sheaves with said rope by manipulating said jam nuts, and the brackets 17 in engagement with said jam rnuts prevent any thrust movement of the bolts as will be understood.

The means for causing a return movement of the rope 13 comprises spiral springs 18 whose inner ends are respectively fixed to the shafts 9 and 11 and whose outer ends are iiXed to a housing 19 or other stationary part of the device as clearly shown in Fig. 5 of the drawings. Said housing may be secured to the casing frame 5 by bolts 2O provided with sleeves that retain the sides of said casing in spaced relation.

It willnow be obvious that when the rope 13 is properly engaged between the sheaves 8 and-10 and is drawn therebetween said sheaves will rotate and thus wind up both the springs 18. It will likewise be apparent that when said rope is released the recoil movement ofsaid springs will rotate said sheaves in the opposite direction and thus carry the rope back to its original position.

Although many other usages may be found for my device, it is particularly adapted for use in moving hay as hereinbefore set forth.

Having thus described my invention, it being understoodthat minor changes may be resorted to in its construction without departing from its scope and spirit, what I claim and desire to secure by Letters Patent of the United States is:

1. A return block comprising a frame cas- Cil engaged by both, a spiral spring for each of said sheaves arranged to be Wound up when said line is moved in one direction, and said springs adapted to cause said line to move in the opposite direction when said line is released.

2. A return block comprising a frame casing, a pair of juxtaposed sheaves mounted for rotation Within said casing, a flexible line disposed between said sheaves, friction tires for said sheaves, means for adjusting one of said sheaves With respect to the other, a spiral spring for each of said sheaves arranged to be Wound up when said line is moved in one direction, and said springs adapted to cause said line to move in the opposite direction when the line is released.

In testimon whereof I affix my si nature.

WE LINGTON DUBER ILL.

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