US1170007A - Conveying-cable grip. - Google Patents

Description

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

CONVEYING CABLE GRIP.

APPLICATION FILED SEPT-23. 1914.

Patented Feb. 1, 1 16.

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Gttozmw THE COLUMBIA PLANOGRAPH co., WASHINGTDN, D. c.

States, and residents of Tacoma, county of Pierce, State of .Washlngton, have nnrrnn STATES? PATENT oration.

EDWARD B. SHIELDS AND LEWIS L. TYLER, 0F TACOMA, WASHINGTON.

CONVEYING-CABLE GRIP.

To all whom it may concern Be it known that we, EDWARD B. SHmLDs and LEWIS L. TYLER, citizens of the Unltid in t e invented certain new and useful Improvements in Conveying-Gable Grips, of which the. following is a specification.

This invention relates to mechanisms for securing a load to a moving conveying and supporting cable.

The objects of our invention are to provide astrong gripping action on the cable; to provide easy means of releaslng sa d gripping action; to prov1de means perm tting a liberal swinging action of the grlp hanger in a plane at right angles to the direction of motion without interfering with the supporting sheaves of the cable; to provide a grip which does not raise the cable Y from the supporting sheave when it is passing thereover; and to provide for changes in'the vertical angle between the cable and the grip hanger due to the sag of the cable or to swinging of the load in a longitudinal direction. We attain these and other objects by the devices, mechanisms and arrangements illustrated in the accompanyingdrawing's, in which 1 Figure 1 is a vertical CI'OSS-SBCUOIIOT our improved conveying-cable grlp showing the parts in position for gripping the cable showing one of the supporting sheaves n dotted lines; Fig. 2 is a side elevation thereof showing the grip in the position occupied thereby when the cable is at right angles to the hanger; Fig. 3 is a similar view showing the said parts at an angle other than a right angle; Fig. 4 is a top plan of the grip; Fig. 5 is a cross-section thereof on the line 5-5 in Fig, 2; and Fig. 6 is a bottom view thereof. I

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

The load is attachedby a hook l, or other suitable means, to the end of a horizontal arm 2 of the grip hanger. This arm 2 extends from the main part 3 of the hanger, said part 3 lying normally at an angle from the vertical as shown. The part 3 extends from adjacent the supportingcable down to the arm 2 and terminates at its upper end in a head t. A cylindrical trunnion or pivot lug 5 extends horizontally from thehead 4 and is provided with an axial hole passing Fatented Feb. 1, 1-916.

Application filed September 23, 1914. Serial No. 863,136.

completely through it and the head 4. The grip is pivotally mounted on this pivot lug 5 and consists of a main jaw 6 mounted and freely turning on the said pivot lug, and a movable jaw 7 pivoted to said main casting 6 on an axis at right angles to the axis of the said pivot lug and parallel with the axis of the cable. Themain jaw'6 has a horizontal pin 8 which forms the pivot of the said movable jaw 7 through which thesaid pin 8 passes. The main jaw 6 has a downwardly opening groove 9 extending from end to end, said groove being, adapted to receive the cable and being preferably provided with corrugations corresponding with and complementary to the strands of the cable. One side of the main jaw 6 is cut away atthe center to receive the movable jaw, said. out

' part extending to the groove 9, said movable passing through suitable openings in the main jaw' and extending upward above the said main jaw as shown. Suitable holes are made in the upper ends of said lugs 10. 7 It will be observed that the outer surface of the jaws 6 and 7 are cylindrical, having the axis of the pivot pin 8 as its axis. The grooves in the supporting sheaves (shown in dotted lines) are formed on a similar curve, thus allowing a liberal swinging action between the said sheaves and the hanger.

A long hand lever 11 lies within the rear groove of the main part of the hanger 3, and extends down beyond the lower end thereof. This lever 11 is pivoted to the said hanger near its upper end by means of the pivot pin 12. A short lug 13 extends upward from the lever 11, above the said pivot pin 12, and has a slot therethrough in line with the axis of the pivot'lug 5. A rod 1a passes through the hole in the pivot lug 5 and through the slot in the lever lug 13, and is provided with a suitable shoulder and nut whereby it is loosely secured to the said lug 13 to move therewith but to allow a slight relative movement to compensate for the circular motion of the lug. A yoke 15 is secured to the other end of the rod 14 and ing the said'lugs 10 of the movablejaw 7.

over which the cable passes.

A spring 16 is secured to the lever 'll and engages the hanger 3 to cause the lever to swing outward therefrom and thus release the gripping movable jaw 7 from engagement with the cable. I

A ratchet lever 17 is pivoted at 18 to'the arm 2 of the hanger and is provided with suitable teeth 19 in its upper surface. A tooth 20 is formed on the lever 11 in such position as to be adapted to engage the said teeth 19 in the lever 17. A spring 21 holds the lever 17 up so that the teeth 19 and 20 will always be held in contact with each other unless disengaged by manually pulling said lever 17 down'and thus releasing the said gripping lever 11. V

The operation of our improved conveyingcable grip is therefore briefly described as follows:The cable lies within the groove 9 in the main jaw ofthe grip and, as soon as the lever 11 is forced inward to the part 3, against the action of the spring 16', the jaw 7 is forced into compressive contact with the cable in the groove through the ac- '-tion of-the lug 13, rod 14:, yoke 15,. and lugs 10. The lever 11 is held in said gripping position by the teeth 19 and 20 of the ratchet device. Now, when. the cable is started, there will be a constant change in the vertical angle between the hanger and the cable and this change is freely permitted because the entire gripping mechanism is mounted on the main pivot lug 5 of the hanger, and since the rod 14E which operates the gripping jaw'passes coaxially therethrough it Is evi-- dent that any such relative movement will not. affect the gripping action of the jaw 7. The motion of the cable will also cause a transverse swinging action of the load and it isnecessary to allowfor this at the sheaves This is provided for by oifsetting the hanger 3 by meansof the arm 2, thus removing the part 3 fromthe path of the sheave, and by curv- '45.

ing the under. side. of the grip jaws and the groove of the sheave to a circular section. As a grip passes over a sheave it is necessary that the cable and grip be both in engagement, with the sheave else the grip will. be raised and the cable will be torn from it and lie onthe sheave. This is accomplished by having the groove 9 only as deep as the diameter .of the cable, thus preventing the cable; from being pulled loose from-the grip. As the cable bends over the sheave it is held only by the gripping jaws which are located centrally between the ends of the grip and there is therefore notendency to pull it away from the grip on this score. The groove 9 has vertical wallsfrom its lower edge to one-half its depth and the-cable lies loosely therein on each side, of the gripped sectionand as it passes overa sheave the cablei's drawn downfrom: the-sends- ,of the grip until the entire grip has passedthe motion of the 'through both of said pivoted to the other.

sheave, but in sodoing the gripped portion engaged between the jaws 6 and 7 'is not moved. 7

Having described our invention what we claim is:

1. In a device of the class combination with a main jaw adapted to endescribed, the

gage a cable, a gripping jaw movably mount- 7 ed on said, main jaw and adapted to grip the cable between the main and movable jaws; a load-bearing device; a horizontal transverse pivot on said load-bearing de- .vice and passing through said main jaw,

whereby the load-bearing device is connected to the aw, and the awis permitted vertical angular motion relative thereto; an operating lever mounted on the load-bearing device; and means passing coaxially through saidv pivot and connecting sald operating lever with said gripping jaw whereby said;

jaw is actuated to clamp thecable.v

2. In a device of the class described, the combination with a main jaw adapted to engage a cable; a gripping jaw pivoted to said main jaw and adapted to grip the cable;

between the main and movable jaws; a loadbearing device an operating lever mounted on the load-bearing device; a horizontal transverse pivot on said load-bearing device and passing through said main jaw, whereby the load-bearing device is connected to the jaw, and the jaw is permitted vertical an gular motion, relative thereto; and a, rod passing coaxially through said pivot and connecting said operating lever with said g each other: to grip the cable, said means also passing coaxially through said pivotal connection between the jaws and the load-bearing device whereby such vertical angular jaws together will not affect their gripping action.

4. In a device of the classdescribed, the combination with a main jaw having an open cable groove in its under surface, said jaw having acavity centrally positioned between its ends and traversing said cable-groove;

a j a-w positioned within said cavity and having agripping surface forming a movable part of the cable groove and adapted to clamp the cable between it andthe main jaw; and a pivot pin lying parallel with and adjacent saidv cable groove and passing jaws whereby one is 5. ln a device of the class described, the

combination with a main jaw having an open cable groove in its under surface, said jaw having a cavity centrally positioned between its ends and traversing said cable groove; a jaw positioned within said cavity and having a gripping surface forming a movable part of the cable groove and adapted to clamp the cable between it and the main jaw; a pivot pin lying parallel with and adjacent said cable groove and passing through both of said jaws whereby the gripping jaw is pivoted to the main jaw; an upward extending lug formed on said'gripping jaw above said pivot pin and passing through the cavity in the main jaw and extending above said main jaw; and means mounted on the main jaw and engaging said lug whereby said gripping jaw is actuated to clamp the cable.

6. In a device of the class described, the combination with a main jaw having a cavity centrally positioned between its ends and traversing said cable groove; a jaw positioned within said cavity and having a gripping surface forming a movable part of the cable groove and adapted to clamp the cable between it and the main jaw; a pivot pin lying parallel with and adjacent said cable groove and passing through both of said jaws whereby the gripping jaw is pivoted to the main jaw; a pair of upward extending lugs formed on the ends of said gripping jaw above said pivot pin and passing through the cavity in the main jaw and extending above said main jaw; a load-bearing device; a horizontal transverse pivot on said loadbearing device and passing through said main jaw centrally between its ends and above said first pivot, whereby the loadbearing device is connected to the main jaw, and the jaws are permitted vertical angular motion relatively thereto; an operating lever mounted on the load-bearing device; a yoke connecting said pair of upward extending lugs and passing across the axis of said second pivot; and a rod connecting said operating lever with said yoke and coaxially positioned relatively to the pivot between the main jaw and the load-bearing device,

. whereby said glillipping jaw is actuated.

WARD B. SHIELDS. LEWIS 'L. TYLER. Witnesses:

E. M. HAYDEN, i GEO. D. NEWBEGIN.

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

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