US1075567A - Rope-grip device. - Google Patents

Description

G. R. HILL.

ROPE GRIP DEVICE. APPLloATIoN FILED DBO. 28, 1910.

l 1,0?5,567.` Patented 0015.14, 1913.

GEORGE R. HILL, OF PORTLAND, OREGON.

ROPE-GRIP DEVICE.

Application filed December 28, 1910.

Specification of Letters Patent.

Patented Oct. ist, MMS.

Serial No. 599,657.

T0 all whom may concern.'

lle it known that l, GEORGE Riot-IARD HILL, a citizen of the United States, and resident of the city of Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful lmprovements in Rope-Grip Devices, of which the following is a specification.

rlhis invention relates to grip devices for ropes of the class more especially adapted for use in the holding and raising and lowering of portable scaffolding employed by painters and the like, although it is also intended for all other purposes where it is desired to adjustably secure a rope at given points under control of the user lts object is to provide a device which shall be simple and durable in construction, cheap in first cost by reason of fewness and easy assemblage of parts, and efficient, positive and secure in operation.

To these ends, my invention consists in certain novel and useful features of construction and combinations of parts, all of which are herein set forth and illustrated in the accompanying drawings forming part of this specification and in which similar letters of reference indicate like parts.

In said drawings :iligure l is an elevation of one side of my device showing the hoisting rope in its secured position. Fig. 2 is a similar view of the reverse side showing a rope attached to the hook of a hoisting-block by means of a loop, and extending downward through the transverse guides. Fig. 3 is an edge view of the gripcasing. Fig. l is a plan view of Fig. l, without the rope.

A represents a block preferably cast integrally, of approximately oval shape, having a central vertical channel a to receive the free end of the hoisting rope R, as seen in Fig. 1, and two transverse channels ai, a1, opening into the vertical channel a and through the side edges of the block. In each of these side channels al, is loosely fitted a dog D having corrugations or serrations CZ upon their inner edges to bite or engage the rope and prevent same from slipping after being adjusted and set. These dogs are of such configuration as to be integrally-counter-weighted in order to always normally engage the rope passing between them, and are pivoted in the casing A through the medium of studs P, P,

one for each, such studs having heads at one end and threads at the other, the latter being fitted with thumb-nuts T. A transverse plate B, preferably separate from the body of the block A, serves both as a washer for the studs l), and thumb-nuts T, and as a convenient means for retaining the rope R in the channel a. rlhe dogs D are each provided with a post Z1 near their outer points, and each has an eye Z2 for engagement with a short chain C, fast to one eye and having a hook c for releasable-connection with the opposite eye, as shown clearly in F ig. l, the purpose of this chain being to keep the dogs D up to their work and prevent them from flying up and thus relinquishing their grip upon the rope at undesired times. Vllhen the adjustment of the rope is to be made in raising or lowering a scaffold, or for finally releasing the same, it

will be understood that the dogs D are released by throwing off the hook c.

Upon the reverse face of the block A, as shown in Fig. 2, I form two transverse guides or loops G, G1, the upper one G heing preferably shorter than the lower one marked G1 so as to conveniently receive and hold the two sections of the rope R1, which are looped through them, so as to enable the bend thereof to engage a hook H of any hoisting or suspending tackle, while the free ends of said rope are connected to the scaffold which is to be raised or lowered.

rlhe operation of my invention is so simple and apparent from the above description, and from the drawings, as to need no further description; and l wish it to be understood that l do not limit myself to the exact construction and configuration of parts, nor to their precise relative arrangement, as the same may be modified within the scope of the appended claims according to mechanical skill and judgment without departing from the essential principle or sacrificing any advantage accruing from my invention.

What I claim and desire to secure by Letters Patent is as follows:

l. In a rope-grip device, a block channeled centrally and vertically for the reception of a hoisting-rope, and also having transverse channels opening from said central channel through the sides of said block; a dog with a serrated edge loosely fitting into each of said transverse channels; the

serrated edges of said dogs serving as clamps to secure the rope in a fixed vertical position between said dogs when the hoisting power is released from said rope; pivotal bearings on which said dogs rotate; one end of saidfpivotal bearings projecting beyond one side of the block; said projecting portions being threaded; posts attached to and laterally projecting from points on the dogs remote from the serrated edges; means attached to said posts to prevent accidental release of said dogs; a transverse plate detachably fastened to one side of the block; thumb nuts on the threaded projecting portion of the bearings to secure said transverse plate to the block, and means to attach the block to a scaffolding.

2. In a ropegrip device, a block channeled centrally and vertically for the reception of a hoisting-rope; and also having transverse channels opening from said central channel through the sides of said block; a dog with a serrated edge loosely fitting into each of said transverse channels; the serrated edges of said dogs serving as clamps to secure the rope in a fixed position between said dogs when the hoisting power is released from said rope; pivotal bearings on which said dogs rotate; one end of said pivotal bearings projecting beyond the sides of the block; posts fastened to and projecting from points on the dogs at the opposite side of the pivotal bearings from the serrated edges of said dogs; a chain connecting said posts; said chain serving to prevent the dogs from accidental release; a transverse plate detachably fastened to one side of the block; thumb nuts operating on the projecting ends to secure the rope in a fixed position between said dogs when the hoisting power is released fi'om said rope; pivotal bearings on which said dogs rotate; one end of said pivotal bearings projecting beyond the sides of the block; posts fastened to and projecting from points on the dogs at the opposite side of the pivotal bearings from the serrated edges of said dogs; eyes in said posts; a

chain with one end thereof permanently se-V cured to one of said eyes and tlie'other end detachably fastened to the opposite eye; said chain serving to prevent the dog from accidental release; a transverse plate detachably fastened to oneside of the block; thumb nuts operating on the projecting ends of the pivotal bearings to secure o-r release said transverse plate for the purpose of inserting or removing a hoisting-rope, and means to attach the bloclr to a scaffolding.

In witness whereof, I have signed in the presence of the two subscribing witnesses.

GEO. R. HILL.

Vitnesses:

PET-nr. HABERLIN, V. K. S'rRoDE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents; Washington, D. C.

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