US 1010018 A
Description (OCR text may contain errors)
APPLIoATIoN FILED APR. a, 1911.
1,010,018, Patented N0v.28,191'1.
MLM 5W (M 477-054/ ns I EMIL CHRISTENSEN, OF PGRTLAND, OREGON.
Speccation of Letters Patent.
Application led April 8, 1911.
Patented Nov. 28, 1911. Serial No. 619,786.
To all 'whom it may concern:
Be it known that I, EMIL CHRISTENSEN, of Portland, Multnomah county, Oregon, have invented certain new and useful Improvements in Snatch-Blocks, of which the following is a specification.
The object of my invention is to provide a cable block from which the cable can be easily and quickly removed.
The invention consists in details of con struction of the block as hereinafter described and pointed out in the claims.
In the accompanying drawings forming part of this specification, Figure 1 is an edge View of the block embodying my invention, Fig. 2 is a vertical sectional view of the same, Fig. 3 is a view partially in section illustrating the eccentric pivot pin on which the locking lever and the locking link are mounted.
In the drawing 2 represents the main body or frame of the block, 3 is a follower, 4 a sheave having a hub or pin 5 and a bushing 6. rIhe frame 2 is provided with a slot or opening between its upper portion and the follower 3 through which opening a cable can be placed upon the sheave or removed therefrom. This opening is normally closed by the locking device which I will hereinafter describe in detail.
7 is an oil reservoir connecting with ports leading to the bushing.
6 is a sleeve or separator and 9 a bolt passing therethrough and securing the body 2 and the follower 3 together.
l0 is a locking link loosely mounted on an eccentric pin 11 which has bearings in bushings 12 mounted in brackets 13. This locking link has a slot therein to receive the end of a lug 14 and the link at one end of said slot has preferably a rounded surface 15 to enter a depression 16 in the upper edge of said lug. A projection 17 is carried by the said locking link and provided with a concave face 18 which overhangs the face of the sheave and forms a guide for the cable thereon.
A locking lever 19 is mounted in the eccentric pin 11 and is adapted to fit within a curved guard or flange 20 when it is in its locking position and thereby is protected by said flange as shown in Figs. 2 and 3. When however, the locking lever is swung to an upright position as indicated by the dotted lines in Fig. 2, the locking link will be raised sufliciently to clear the outer end of the lug 15 and thereupon the said link can be swung outwardly to expose the opening leading to the sheave and permitting the placing of the cable on the sheave or its removal therefrom. When the locking lever is swung down to its positionl within the guarded flange, the eccentric pin will draw down on the locking link and seat it in the depression in the lug 11 and thereupon the said link will be locked and the cable cannot be accidentally disengaged from the sheave. The eccentric surface on the pin is so arrange-d that the locking lever will swing past the center in moving to its locking position and there .will be therefore no tendency on the part of this lever to swing to its releasing position until it is tripped by the operator.
I do not wish to be confined in this case to the details of construction herein shown as many of them are capable of various modifications without departing from the spirit of my invention.
I claim as my invention:
1. A snatch block comprising a frame, a sheave journaled therein, said frame having a slot or opening to allow the cable to be placed on said sheave, a link bridging said opening, a lug having a depression to receive one end of said link and means for moving said link lengthwise to lock it in said depression.
2. A snatch block comprising a frame having a slotted side wall, a sheave journaled in said frame, an eccentrically pivoted locking link arranged to bridge said slot and a locking lever.
3. A snatch block comprising a frame having a slotted side wall, a sheave journaled in said frame, a locking link bridging said slot, a pin whereon said link is eccentrically mounted, a lug in the path of the said link and means for rotating said pin to move said link into or out of contact with said lug.
1. A snatch block comprising a frame having an opening in its side wall, a sheave mounted in said frame, a link arranged to bridge said opening, an eccentric pin whereon said link is loosely mounted, a lug in the path of said link, said pin being capable of partial rotation to move said link lengthwise to its locking or releasing position, and an operating lever carried by said pin.
5. A snatch block comprising a frame having an opening in its side wall, a sheave journaled in said frame, and an ecoentri- In Witness whereof, I have hereunto set cally mounted means for closing said slot. my hand this 22nd day of March 1911.
6. A snatch block comprising a frame EMIL CHRISTENSEN having an opening in its side Wall, a sheave 5 journaled in said frame, an eocentlioally Witnesses:
mounted means for closing said slot, and H. V. CARPENTER, means for locking said closing means. PETER SKORBERG.
Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C.