US1150972A - Conveying-cable-supporting sheaves. - Google Patents

Description

E. B. SHIELDS & L. L. TYLER.

CONVEYING CABLE SUPPORTING SHEAVES.

APPLICATION FILED SEPT.23, I914.

4am m m JT/ comm-nu PLANOGRAPH COHWASHINGTON, n. c

E. B. SHIELDS -& L. L. TYLER.

CONVEYING CABLE SUPPORTING SHE/WES.

APPLICATION FILED SEPT-23, 1914- Patent ed Aug. 24, 1915.

3 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH (0., WASHINGTON. D. c.

a New;

E. B. SHIELDS & L. L. TYLER.

CONVEYING CABLE SUPPORTING SHEAVES.

APPLICATION FILED SEPT.23, 1914.

1,150,972, Patented Aug. 24, 1915.

3 SHEETS-SHEET 3- 6f Zea/13' Z. fjr

W 2 m X? emu:

COLUMBIA PLANDGRAPH co., WASHING-EON, D. c.

EDWARD B. SHIELDS AND LEWIS L. TYLER], OF TACOMA, WASHINGTON.

CONVEYINGr-CABLE-SUPPORTING SHEAVES.

Application filed. September 23,1914.

To all whom it may concern Be it known that we, EDWARD B. SHIELDS and Lnwls L. TYLER, citizens of the United States, and residents of Tacoma, in the county of Pierce, State of Washington, have invented certain new and useful Improvements in Conveying- Cable- Supporting Sheaves, of which the following is a specification.

This invention relates to mechanisms for supporting and guiding a conveying and supporting cable on which a load is fastened to be transported.

The objects of our invention are to pro vide a means by which the moving support ing and conveying cable may be supported at intervals; such means allowing the grip by which the load is attached to the cable to pass it without interfering therewith; such means being adapted to be supported and anchored down from any supporting object as may be found in rough lumbering country; and to provide means for holding said conveying Cable down when its strain tends to lift it from the supporting sheave.

We attain these and other objects by the devices and arrangements illustrated in the accompanying drawing, in which Figures 1 and 2 are views of a part of a logging cable system in which the load is such as to cause the said cable, in Fig. 1, to engage the hold down sheave in the center support, while in Fig. 2 the cable engages the supporting sheave at the same point; Fig. 3 is a front elevation of the device; and Figs. 4 and 5 are elevations of the right and left sides thereof, respectively.

Similar numerals of reference refer to similar parts throughout the several views.

Referring first to Figs. 3, 4L and 5 it will be seen that the main or cable-supporting sheave 1 is mounted on a pin 2 fixedly secured in and extending from the lower end of the frame, and that said sheave is provided with a suitably rounded groove 3 adapted to fit the similarly shaped jaws of the cable-grip. Another and smaller sheave 1- is mounted on a pin 5 directly above the sheave 1 and parallel therewith, said sheave 4 being provided with a groove 6 adapted to be engaged on its under side by the cable and to hold it down. The frame on which the two said sheaves 1 and 4 are mounted is, in general, shaped as an inverted V or Y, one arm 7 of which is provided with a boss at its lower end in which the pin 2 of the Specification of Letters Patent.

Patented Au 24, 1915.

Serial No. 863,135.

supporting sheave 1 is fastened. The arm 7 passes close beside the said sheave 1 and is then offset therefrom, as at 8, to provide space for the swinging of the cable-grip. Above the offset 8, the arm 7 returns to the same vertical plane as below it and is provided with a boss for receiving the pin 5 of the sheave 1. The frame then loops over the sheave 4 and is provided at its uppermost point with a holed boss9 by which the supporting device is attached to the frame. The frame then passes downward to the other side of the sheave A and the other end of the said pin 5 is received in a suitable boss. The arm 10 of the frame passes off at an angle, near the pin 5, to a point slightly below the pin 2 of the sheave 1 where it terminates in a suitable holed boss 11. The lower end of the arm 7 is provided with two suitable holes 12 by which a steadying means may be fastened to the frame.

Referring now to Figs. 1 and 2; the support for the cable supporting sheaves illus trated at A consists of two trees between which a cable 20 passes. The said cable 20 is fastened to the boss 9 of the frame so that all the load on the sheave 1 will be supported by the cable 20. Two anchor cables 21 are secured to the arm 7 (behind the sheave) and pass therefrom in suitable directions to hold down and steady the frame, while two other cables 22 are fastened to the boss 11 of the arm 10 and similarly hold it down; thus the sheaves 1 and 4: are held from any vertical or swinging movement. Similarly at B the cable supporting sheaves are secured to aswingle tree, by means of a bracket arm 23 extending from the tree to the boss 9 and a hanging cable 24: also secured thereto. Another bracket 25 may be secured to one of the holes 12 at the end of the arm 7. Similar brace cables 21 and 22 are secured to their respective parts of the frame and hold it firmly down and against swinging motion. Also, at C, the cable supporting sheaves are secured to a gin-pole 26, suitably guyed by cables 27, by means of a hanging cable 24 and the frame is braced as before by the cables 21 and 22 as above described.

The load 30, in this case considered to be a log, is secured to the traveling cable 31 which rests on the supporting sheaves 1 or is held down by the small sheaves 1. At B, for instance, in Fig. 1 the said cable is being held down by the sheaves 4: against the action of the tension in the cable which tends to raise the cable to a line between the supports A and C,but as the load 30 approaches the said support B the weight on the cable lowers it into contact with the sheave 1, as in Fig. 2. Thus it willbe seen that the cable 31 always follows approximately the same profile, except for changes in the sag between supports due to changes in degree and distribution of the load.

Having therefore described our invention, what we claim is 1. In a traveling cable guiding device, the combination of a frame adapted to be loosely hung from its upper end; a pair of arms extending downward from its upper end, one of said arms being substantially vertical and the other arm extending at an,

angle therefrom; guying means attached to the ends of both said arms and coacting to oppose any vertical, swinging, or twisting motion of said frame; and a grooved cable supporting and guiding sheave mounted on said vertical arm near the lower end thereof.

2. In a traveling cable guiding device, the combination of a frame adapted to be loosely hung from its upper end; a pair of arms Copies of this patent may he obtained for five cents eaeh,.by addressing the Commissioner of Patents,

hung from its upper end; a pair of arms extending downward from 1ts upper end, one i of said arms being substantially vertical and the other arm extending at an angle therefrom; guying means attached to the ends of both said arms and coacting to oppose any vertical, swinging, or twisting motion of said frame; and a pair of grooved guide sheaves mounted on said vertical arm, one

above the other, in arallel arrangement,

and adapted to guide the cable traveling between them.

EDWVARD B. SHIELDS. LEWIS L. TYLER. WVitnesses:

Gno. D. NEWBEGIN, O. OLSON.

Washington, D. G. a

Images