US1536738A - Bull hook - Google Patents

Description

O. A. Wl'R-K'KALA BULL HOOK Filed July 16, 1924 Fig. 1' I -May 5, .1925.

Fig. 2

INVENTOR, mm a. wufmza.

BY am 6. saw I A TTORNEY.

Patented Ma y ,5, 1925.

UNITED STATES OSCAR A. wmnxata, or. Kane, wasirrneron.

Application filerl July 16,

To all whom it may concern: a

Be it known that I, OSCAR A. liunnana, a citizen of the United States, and a resident of Kent, in the county of -King and State of Vaslnngton, have lnventeda new and useful Bull Hook, or which thefollowing is a specification.

My invention relates to improvements in bull hooks, more especially the kind used. in

heavy logging, and one of the objects of my improvements is .to provide a bull hook which is engageable and disengageable with the service cable without requiring more slack therein than is needed to relieve the tension therefrom. Another objectof my improvements is toprovide a bull hook that is connectedto the hauling cable and to the service cable without the usual eyes spliced in the ends of said cables. Another object of my improvements is to provide a bull hook having swivel connections with both the hauling and servicecables. Another object of my improvements is to provide a bull hook that makes a positive engagement with the service cable. Another object of my improvements is to provide a positive hook having keeper mechanism disposed in amannor to protect it from injury during hook operations yet readilyaccessible for oper ative changes. And a further object of my improvements is to provide a bull hookdesigned for casting in steel with-a distribution of the metal advantageous for strength and lightness, and smoothness of contour and compactness.

I attain these objects with the mechanism illustrated in the accompanying sheet of drawings in which Figure 1 is a top plan view of my hook, Fig. 2 is a front elevation;

Fig. 3 is a bottom plan view of Fig. 2 and' Fig. i is a side elevationof Fig. 2.

Similar characters refer to similar parts throughout. Certain parts are broken away to show other parts hidden thereby.

More particularly:- The main body of the hook is a hollow cylinder 5, the interior walls of which are shown at a, having its upper end closed except for central hole 6 through which hauling cable 7 enters. On the inner end of cable 7 is fixed knob 8, preferably, in a manner disclosed in my Patent Number1,496,142, June 3, 1924. Hole 6 is smaller than chamber 0, and knob 8 bears on the interior flange surrounding said hole when cable 7 is under strain. The lower end of the hook body has two hori;

13 and a opposite each other.

and thusdisengaged from the hook. replace cable 11 in engagement with the noon.

1924. Serial No. 726,410.

-zontal jawsi) and 7) which unite at 10 in the rear of the hook body. Said jaws are spaced apart at a wide enough to admit servicecable 11 ton central position in chamber a, longitudinally. On the inner end of cable 11 is fixed cable knob 12 which,

when said service cable is engaged by. the

.l iook,bears on top of jaws 9 and a when said cable is under operative strain.

lower end in contact with the top surface of aws 9, b. In aws 9 and b are recesses recesses are housed keeper 14, dog 16 and spring 20. Recess e in jaw Z)? is only sufficient to house and provide a stop for the free end or keeper lt when in operative position, while recess 13 has capacity to house the pivoted end of keeper 1 1 and said dog and spring. Keeper 14: is pivoted by cap The 'i'rontof hook body 5 is open at enough to permit knob 12 to enter chamber a with its In these screw 15 in jaw 9 and can oscillate on its pivot from its full-line to its dotted-line position in Fig. 3. Dog 17 is'pivoted by cap; screw 17 in jaw 9 and has hit 18 and tail 19. and can oscillate from its full-line to its dotted-line position in Fig. 3. When i in its full-line positionit is engaged with tooth o of keeper 14, and in its dotted-line position it is disengaged from said keeper. Spring 20 reacts betweenjaw 9 and tail 19 of dog 16 to maintain bit 18 engaged with tooth an. operative on tail 19 will cause said dog to pass to its dotted-line position out of engagement with keeper '14- Then if cable 11 is not undertoo great strain said cable and knob 12 can be removed from jaws-9, To

hook, it keeper 14 is closed, pressure on tail 19, as described will release said keeper and it can be swung on pivot 15 to its open position at 1 1 when said cable and knob can be installed within the'hook and with. the

closing of keeper 14-. are positively engaged distribution of the metal of the hook body for straiirresisting purposes. The absence of obstructions on the upper surface of the Pressure from the finger of an jaws allows the engagement and disengagement of the hook without slack in the cables. The freedom of both cable attachments to the hook to revolve provides a swiveling feature that is very useful and is obtained by simple means. In practice, operatives are well pleased with the design of this hook for'it dispenses with the need of spliced eyes at the cable ends. These are always accompanied with protruding wire ends which cause injury to the hands 01 said operatives. Furthermore the extreme lightness of this design provides a sufficiently strong hook that is easily portable when used with cables one and one-half inches in diameter.

Having thus disclosed my invention, what I claim as new and desire to secure by Letters Patent is,

1. In a logging hook in combination, a hollow hook body having means on its upper end for the attachment of a hauling cable thereto and having an opening through its front wall near its lower end for the passage of a service-cable knob therethrough, transverse jaws on the lower end of said hook body having a slot therebetween adapted to receive a service cable and having an upper surface adapted to seat said servicecable knob, and a removable keeper disposed in recesses in said jaws and adapted to bar said jaw slot in front of said service cable whereby said service cable is reinovably re tained between said jaws with said servicecable knob on top thereof.

2. In a logging hook in combination, a hollow hook body having a hole through its upper end, a hauling cable end inserted in said hole and protruding within said hollow body, a cable knob fixed to said hauling cable end within said hollow hook body whereby said hauling cable is positively ongaged with said hook body and free to revolve therein, two jaws on the lower end of said hook body spaced to receive a service cable therebetween and having an upper surface adapted to seat a cable knob, a service cable having a cable knob fixed on the end thereof between said jaws with said knob bearing on top thereof, and a keeper removably disposed as a bar across said jaws in front of said service cable whereby said service cable is removably and positively engaged with said hook body and free to revolve therein.

OSCAR A. \VIRKKALA.

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