US1457987A - Safety lock for logging hooks - Google Patents

Description

June 5, 1923. H,457,%7

o. MICKELSON SAFETY LOCK FOR LOGGING HOOKS Filed Nov. 1, 1922 Patented .lnne 5, 1923.

l -ti as? n.

SAFETY LOCK ,ron ro'eeine HOOKS.

Application filed November 1, 1922. Serial No. 598,406.

T 0 all whom it may concern.

Be it known that I, OLE M'IOKELSON, a citizen of the United States, residing at Hoquiam, in the county of Grays Harbor and State of Washington, have invented a new and useful Safety Lock for Logg ng Hooks, of which the following is a specification This invention .relates to logging hooks and more particularly to locking devices therefor.

The object of the invention is to provide a strong, cheap and eflicient hook of this character having means to close the b ll and prevent the article engaged by the hook from being accidently separated therefrom.

With the foregoing and other objects in' view which will appear as the description proceeds, the invention resides in the'combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention. In the accompanying draw1ngs:-- Figure 1 represents a side elevation ofa logging hook equipped wlth one form of this invention. Y

Fig. 2 is a top plan view therof with the lock shown in operative position.

Fig. 3 is a side elevation showing another form of the invention applied. r

Fig. 4 is a plan View of the form shown in Fig. 3 with the lock in operative posit on.

Fig. 5 is a side elevation showlng still another form of the invention.

Fig. 6 is a plan view therof.

Fig. 7 is the side elevation of still another form of the invention.

Fig. 8 is a top plan view thereof, and

Fig. 9 is a transverse section through the locking pin.

In the embodiment illustrated in Figs. 1 and 2, a clevis C having the usual apertured arms to receive a connecting pintle which is here shown at 5.

The logging or butt hook 1 has the usual shank 2 provided at its free or outer end with an eye 3 for the passage therethrough of the pintle 5 which connects the hook with the clevis. The bill 4 of the hook is shown spaced from the connection of the hook with the clevis a sufiicient distance to permit a logging chain or a tag line to be inserted.

The pintle' '5 is here shown-provided at the end adjacent the hill '4 of the hook with an enlarged disk-like head 6 having fa recess 7 in its perimeter which is designed .to be turned into register with the hill 4 of the hook when it is desired to release the hook from the tag line. The turning of'the disk 6 into the position .shown in Fig. 2, will close hook 1 and prevent all possibility of the tag line or logging chain which is connected therewith from being accidently disengaged, the pull which is exerted on clevis C being in a direction opposite to that ex erted on the hook I so that the pintle 5 is held against turning thus preventing .all possibility of the recessed disk 6 turning to bring the recess 7 into register with bill-it and thereby release the tag line. When the strain is relieved on the clevis and hook, obviously thepintle 5 may be freely turned to bring the recess in the disk 6 opposite the bill 4 of the hook to permit the tag line to be taken .out. I i

WVhile this hook is designed primarily for use on the tag line of a logging apparatus, obviously itmay be used forany other purpose,

In logging operations employing speedy, donkey engines, there are two lines used, one being .the main line which hauls the log in to the landing, and the o'the'r the haulbac'k which takes the main line back into the C of this hook is engaged. Thebill l of the hook is designed to be engaged with what is known as a choker which is a cable or chain that encircles the log to be manipulated. In steep and rough country, it is oftentimes very difficult to prevent the choker from slipping off the butt hook and it is to overcome this difliculty that this invention is designed.

In the form shown in Figs. 3 and 4, the clevis C is substantially the same as that shown in the other figures and is designed to be used for the same purpose. The hook 1 used in this form is substantially the same as that shown in the other figures, the difference in this structure being that the locking disk, instead of constituting the head of the connecting pintle 5, is made separate and loosely mounted on the pintle between the clevis and the eye 3" of the hook.

The locking disk 9 which is mounted on the pintle 5 has a recess 7 in its perimeter I which is'designed when turned into register I with the bill 41? ofthe" hook to release the'tag line, and when said disk is rotated to place this recess out of register, the pull exerted on the clevis and the hook will prevent rota tionof the disk and securely close the hook against disengagement.

In the form shown'in Figs; and 6, the

structure is substantially the same as that shown in Figs. 3 and 4 except that the hook 1 is arranged in a plane at right anglesto 7 that shownin the other figures so that the disklO is in the same plane asthe hook and is equippedwith a recess 11 in its periphery to registerwith the bill ofthe hook when it is desired to release the tag line.

f In the form shown in Figs. 7 and 8, the

-- hook. 1 has the billet thereof twisted or deflected laterally as; shown clearly in Fig. 7 to position it adjacent the disk-like head 12 off-the pintle13 which connects the eye of i the hook wih the clevis C. This disk-like head 12 is recessed as shown at 14, which recess is designed to be positionedopposite the bill Pofthe hook when the tag line or other object engaged by the hook is to be released.

'An auxiliary lock'for the disk 12 is shown in the forinof a pin 15 which is loosely mountdown into position to the hook 1 to prevent ed "in the disk 12 and is designed to drop t rning of the disk so' that the recess 14 therein will not register with the bill of the hook until this pin is I lateral extension "17 opening through one side wall of-the aperture of the disk in which lifted. This pin 15 is provided with a longitudinally extending key 16 which lies in a 1;, the p'n is mounted soas to prevent turning .ofthe pin.

I This pin 15 has ahead18 at one end and its otherend may be equipped with any suitablemean's forpreventing the witl1 drawalof the pin, it being preferably upset for thispurpose.

' Fro'm'the above vious that the various forms of' locks shown will all reliably close the entrance" to the engagethe shank of 1 description t will be 'obr hook and prevent disengagement therefrom V of the article held thereby."

I claim:-- l; A butt hook forlogging'apparatus hav ing a shank with an eye at one end and a bill at the other, a pintle to extend through the head having a recess in its periphery adapted when the pintle is turned a predetermined distance to register with the bill of the hook to provide for the application and release of the article tobeengaged by the ho i 3. A hook of the class described compristle to be mounted in said eye and having a disk-like head fixed one end'to be positioned adjacent the bill of the, hook,v said head having the recess in its periphery adapted when the pintle is turned a predetermined distance to register with the bill of the.

hook to provide for the application and releaseofthearti-cle to be engagedby the hook, said disk-like head having a! pin loosely mounted therein to 'drop into enga e-1 ment with the shank of thehook to prevent turning of the "pintle' beyond a l predetermined point.

: In testimony that I claiinjthe foregoing as ing a shank with an eye. at,, one;end, a pin:

my own, I have hereto affixed my signature 1 in the presence of two witnesses.

Witnesses; e

J. A. FAIRBAIBN," W. W. WEL s,

,oLE IoKELsoN.

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