US2368976A - Toolhead lock - Google Patents

Description

Feb. 6, 1945. w. DYSART ETAL TOOL HEAD LOCK Filed Dec. 15, 1943 W L.Dl. sart I AlOlL5OL.Am RS.

MOM

Patented Feb. 6, 1945 z,36s,91e

- TQQLHEAD-LOCKF WilliamJI. Dysart and Alonzo L. Adkins; Lebanon, Ohio Applicatiflnneember 15, 19%3, Serial No..5,14,4 14.

6iGlaims (Cl. 306 33') Thisinvention relates to an improved tool head lock particularly adapted for, use in conjunction with carpenterstOOlSgSllCh asrham ners, hatchet's and the likealthQughnot. limited tosuch use.

As is well known, aisimple metal wedge-has 5 heretofore been widely used as a means oftlocke ing say a hammer head,or. the,lile on the handle therefor, the wedge bein drivenyinto, the forward end of the handle to expandlthe ,woodtin the eye of the tool head. However, such expedient has prover- 1 inefiective and unsatisfactoryv for the-reason that, in a great many instances; the wedge sooner or latertbecomes loose with the result that the tool head also becomes looselon the handle An object of; the present;invention,,therefore, is: to provide a; lock embodying a uwedge which, underordinaryv use. of: a .tol, -Wil1- not become .loose' and; will permanently and solidly secure-the tool head on thehandle therefo'r.

A further objector theinvention isto provide a wedgewhich, after bein driven into the-for-- ward end of; thetool handle to expandthe wood thereofin'the eye ot the tool head, ;may be distorted to engage the handle externally of 1 the normal line of the Wedge-fQrdockingthe wedge solidly in posi ion;

Another .object of theinvention is to,provid,e-a wedge having tongues at opposite edges thereof which;v after thev wedge-has been driven into the forward end, of the handle ma be bent laterally vto project beyond; the.;lines ofkthe vvedge and bite into the wood-of-zthehandle fonlocking the wedge against retrograde movement, I

Still another obJ' eat-,ofthe -invention ,is '.;to,p ro vide a wedge wherein ashort shoulder will-be provided 'atsthe base oileach tongue to furnish a fulcrum; so that by hammering against thetongue towardthe tipthereof, ;the tongue will be caused to bend laterally outward nearqthe shoulder: and sinkwintmthewood of, the handlerv Awfurther. object of the invention is to provide a 1 wedge. whereinrthe metal of; the-wedge 'will bemore or less malleable; ascontrasted with a highly resilient'metal, so that'when :the tongues; are bent laterally to engagevatherwood ;of-;;the handle,

40: e 15 shown as curved 'to'conform t0 the-curvature said tongues will remain in their-{bent or-distorted,

will appear during the course 0f; the following;: description, and inthedrawing;

Figure 1 is a viewpartly= int -sideselevatiom and, partly in section showing; our improvedi-lockiinconjunction with a conventional hammer this view-illustrating- ,the ,manner in which aapunchgis; used. "to bend; the; tongues ofqthe Wedge laterally; Figure 2 is a view similar to-Figureiland showingthe tongues-bent laterally,

' Figure 3v is a .detailtsideoelevation of the wedge: Figured is :azvertical; transverse sectiomshowza ing the; diagonal. channels swhich'arezprovidedato: receive; the, punch;v employed: fora: bndinge'the; wedgetonguesh Figure 5' is adetail side elevatiomshowingcthe tongues bent'flaterally.

Figure 6 fis an edge elevation of: the wedge: Figure 7 'isa top plan; view ofutherwedge: Figure 8 is a perspective-wview :oi theipunch employed. i r 1 Referring-now more particularly to the-;:draw ing; it will b'e seen that we have; for'convenience; shown ourimprovedlocking device inconjunc tion witha' conventi'onal-hammer embodying the, usual metal head I 0 'having-an='eye I I to tightly receive the forward end of thewooden' handle -I 2. As will be understoodas-the description proceeds"; the invention-iswel1 adapted for use in conjunc-- tionwith many other-tools'and'wedo not; there-"- fore, wish to be'limited in= this respect. a

I, of within-said*eye.- As seen in Figures 3" and 6: of the drawingpthe wedge is tapered at= its sides and edges and these 'surfaces'are smooth so-that the wedge maybe readily'driven into'place, In the presentinstance, the, upper edge of the wedge" of the'upper'face-of the head I0. Howeventhis detail is immaterial and the uppenedge of the wedge may be square if so'desired. g

' Suitably. cut or otherwise formed in the wedge" from vthe side edges thereoft'are'like' diagonal-slots" I 4 which slope downwardly a'nd inwardly toward the tipioftheowedgeat'thesame angle. The'upg- Der ends-of thesev slotsifiare. preferably located an,- proximately midway between the ends of "the Wedge. Similarly formed in-the wedge from the side edges thereof a short distance below the slots M are parallel, diagonal slots 15 which are much shorter than the slots l4, say about half as long more or less. The slots l4 may thus be identified as the long slots'and the slots I as the short slots.

Aswill now be seen, a diagonal tongue I6 is defined betweeneach pair of slots I4 and I5 and, as will now be appreciated, these tongues [6 normally lie flush with the side (faces of the wedge like the tongues I6, normally conform to the Iv lines of the wedge.

Formed in the wedge from the upper end thereof are intersecting, diagonal channels I8 each sloping from a point near one side edge of the wedge to open at substantially a right angle thereto into the diagonally opposite slot IB located at the other side edge of the wedge.

These channels enter the slots about midway of the depth thereof.

In conjunction with the wedge I3 we provide a punch I9, seen in detail in Figure 8 of the drawing. The punch may be provided with a knurled stock, and projecting therefrom is a reduced stem of a diameter to removably fit more or less snugly in either of the channels I8 of the wedge selectively,

It is now to be noted that the wedge I3 is preferably formed of a suitable metal which is more or less malleable, as distinguished from a metal having a pronounced characteristic of resiliency. Thus, when the tongues I6 are bent, they will remain permanently in their bent or distorted shape instead 06 pronouncedly tending,

as would spring tongues, to flex or spring back to original or normal shape or disposition.

In practical use, the wedge I3 is first driven into the forward end of the handle, as seen in Figure 1 of the drawing, so that the wedge lies flush with the upper face of the head I0. The

stem 20 of the punch I9 is then inserted in one of the channels I8 to rest against the corresponding tongue I6, after which the punch is struck with a hammer or the like to pound against the tongue and bend the tongue laterally into the Wood of the handle. Having bent one tongue, the punch is reversed to extend within, the other of the channels I8, when the hammering operation is repeated to bend the other tongue laterally into the wood of the handle. As'the stem of the punch selectively fits either channel snugly, the forward end of the stem will be prevented from riding along the tongues under impact of the hammer blows on the punch.

Assuming the channels I8 to be projected, attention is now directed to the fact that the slots I5,are of a depth to extend past the lower ends of the channels so that either one or the the tongues will be caused to further bend laterally outward and bite into the wood of the handle at the tips of the tongues, as shown in Figure 2 of the drawing, for locking the wedge solidly in position.

Having thus described our invention, what we claim is:

' 1. A tool head lock including a wedge adapted -to be driven into the forward end of a handle,

and a tongue carried by the wedge, the wedge being formed with a channel adapted to receive a punch to contact and bend the tongue laterslot and adapted to receive a punch to contact I the tongue after the wedge is in place for bending the tongue laterally into the material of the handle for locking the wedge in position.

4. A tool head lock including a wedge adapted to be driven into the forward end of a tool handle and provided at one side edge thereof with'spaced long and short diagonal slots defining anintervening tongue as well as a shoulder between the short slot and said edge of the wedge beneath the tongue, the wedge beingformed with a diagonal channel opening into the long slot and adapted to receive a punch to contact the tongue after the wedge is in place andbend the tongue laterally across said shoulder into the material of the handle for locking the wedge in position.

5. A tool head lock'including a wedge adapted to be driven into the forward end of "a tool handle and "provided with a channel there-- is driven into position.

through leading from the outer end'of the wedge and with a tongue opposite the inner end of said channel whereby a tool may be inserted in said channel to engage and bend the tongueinto the material of the handle after'the Wedge 6. A tool head lock including a wedge of normal symmetrical contour and provided with a tongue normally lying within the. lines of the wedge to conform to the symmetrical contour thereof and permitthe wedge to be driven into the forward end of a tool handle without mutilation of the material thereof by said tongue, the wedge being provided with a channel. leading fromv the outer end of the Wedge. and terminating opposite said tongue whereby a tool may be inserted in said channel to engage and bend the tongue into themat'erial of the handle after the wedge is driven into position.

WILLIAM L.- DYSART.

- U r I IALONZOI L. ADKINS.

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