US1259704A

US1259704A - Tool-lock.

Info

Publication number: US1259704A
Application number: US16038617A
Authority: US
Inventors: Hugo A Zeckendorf
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-04-07
Filing date: 1917-04-07
Publication date: 1918-03-19
Anticipated expiration: 1935-03-19

Description

H. A. ZECKENDORF.

TOOL LOCK.

APPLlcATlou HLED APR. 1. 1911.

1,259,'74 Patented Mal. 19, v191g.

TOOL-LOCK.

Specification of Letters Patent.

Patented Mar. 19, 1918.

Application filed April 7, 1917. Serial No. 169,386.

`To all fwhom t may concern:

which will securely lock the tool to its handleand allow it to be readily removed therefrom. Another object of my invention is to provide a lock which will hold the handle in the eye of a tool when the said eye is tapered in only one direction instead of the double diverging tapers commonly used. By the use of a single taper the tools and handles therefore are cheaper to manufacture, and owing to the possibility of making perfect eyes the handles are interchangeable and make possible the standardization of the eyes of tools and handles therefor. Further objects in the invention are to provide means for securing the lock against displacement and to prepare the handle for the reception of the lock.

lVit-h these and other objects in View the invention consists in the novel construction and arrangement of parts as hereinafter set forth and pointed out in the appended claims, reference being had to the accompanying drawings forming a part of this specification.

Figure 1 is a View in side elevation, showing the improved lock used vin connection with an ax.

Fig. 2 is a view in side elevation of the tang of the handle, showing the opening therein for the lock.

Fig. 3 is a view in perspective of the improved lock assembled but not positioned in the tool.

Fig. 4 is a View in perspective of the three principal members of the lock slightly separated from each other to better show their construction.

Fig. 5 is an enlarged longitudinal sectional View of the lock, showing the spring member used in connection therewith.

Fig. 6 is a view in section through the tool and handle, showing the lock positioned therein.

Fig. 7 is a view in section on the line 7-7 of Fig. 3.

Referring to corresponding parts by the same numerals of reference, 1 denotes a tool, in this instance an ax, having an eye 2 elliptical in cross section and tapered from end to end, as shown. Formed in the walls on both sides of this eye is a circular opening 3 for the reception of the lock.

rlhe tang of the handle l is shaped and tapered to correspond with the eye 2 and is provided with a circular opening 4, which, when the tang is seated in the. eye, will aline with the opening 3 in the tool. From the outer edge of the opening 4C a slot 5 is provided extending to the end of the handle, and formed on the opposite side of the hole 4 is an arc-shaped recess 6 extending across the tang.

The lock consists of a plate-shaped member 7 adapted to fit slot 5 and of equal width with the tang of the handle. rl`his member is provided with a head 9 of the same shape as recess 6 and is adapted to rest therein when the body fits slot 5. The plate and head are providedwith slots 8, one on each side, extending longitudinally thereof, which are cut only partially through except at the end thereof, leaving a thin web 10 to hold the two halves together. Within the slot thus formed is a spring l1 having' the curved ends 12, which normally lie within the periphery of head 9, and one of these curved ends is provided with a laterally bent portion 17, which extends into a slot 18 cut transversely of the head 9.

Adapted to be placed one on each side of the plate 7, adjacent to the head 9, are two segmental keys 13, which are alike in shape and together form a cylinder having the diameter of the hole 3 and a length equal to the thickness of the tool. The main portion of these keys is a segment smaller than a semicircle by half the thickness of the wedge 7, while thev shoulder portion 14 thereof is by the same amount larger than a semicircle. Thus when these keys are assembled an opening is provided through which the wedge may pass and the portions projecting beyond the wedge form a complete cylinder which exactly fits opening 3.

The curved portion 12 of spring 11 normally projects outside of the undercut 15, and when the parts are assembled this portion of the spring enters the slots 16 in the keys. The tool is locked by first placing the wedge 7' with the spring imposition in the slot 5 and then positioning the tool on the tang. This brings openingsY 3 and el in alinement so that byVY inserting the end of key 19 into slot 8 and pressing on springA 11 the two keys may be inserted from oppositev sides. l Y l l/Vhen the key is withdrawn the resiliency of the curved end 12 causes tliespring to rise until the shoulders 12 enter the slots 16", which thus prevent lateral displacement of these keys. Now with these keys held it will'b'e apparent that it will be impossible foi-.the tooli to accidentally dislodge from the handle. When, however, it is necessary tol replace the handle'it is only necessary to depressthe spring 11 by a key 19 or other flat'objectsv and thenpress out keys 13, allowing the tool to be' easily removed.

While l have illustrated and described the preferred embodiment ofy myv invention, it will, ofcourse, be understood' that' changes in Ininorvdetails` and form of construction maybe resortedito without departing from` the spirit thereof.

Having thus' ldescribed my invention, what I claim and desire to'secure by Letters Patent is- 1. The combination with a handle having a slot formed in one end andan enlarged opening in the lower end of the slot, of a.

tool ada ated to be received by the' slotted end of tie handle, said tool having a transverse opening formed therein in alinement with the enlarged lower opening in the han dle slot, a locking bar adapted to be received by the handle slot, a sectional key insertible through the alined transverse openings in the tool and handle, a spring member carried byv the locking bar adapt-ed to engage the key and secure it against endwise removal,Y and manually operable' means for depressing said spring to release the key and to permit removal thereof;

2. rlhe combination with a handle having a slot formed in one end and an enlarged opening in thelower end of the'slot, of a tool adaptedto be received by the slotted end of'the handle, said toolhavin'g a trans'- verse opening formed therein in alinement with the enlarged lower opening in the'handle slot, a'locking bar adapted to be received by the handle slot, a key insertible through the alined transverse openings, a locking membercarried bythe looking bar adapted to secure kthe key against endwise removal,

and manually operable means for releasing said locking. means to permit removal of the key.

3; A tool lock comprising a lock bar, aV head'on saidbar extending outwardly 'from` the' opposite sides thereo'f, a' slot extending lengthwise'yo'f said A lock bar," a spring located within said slot y and having laterally extending ends conforming approximately to the shape of the said head and normally projecting above the outwardly extending sidesv ofsaid head, keys-'having their inner faces adapted to engage the sides of the lock bar, and outwardly extending shoulders of said head projecting-over the edges of said lock bar, the extending endsof said 4l. The combination with toolhead hav- Y ing'a circular opening disposed transversely across the eye thereof, a handle havinga slot in the tang thereof communicating with a transverse opening therein'adapte'd'to aline with the opening in said toolhead, a locking wedge, anv enlarged head thereon having outwardly extending shoulders on'the sides thereof, and the' lower portion conforming` to the contour of the transverse openingf'in' said handle, said locking' wedge having aY longitudinally extending slot in the sides thereof and across said head, a transverse slot across the outer end of' said head, ai' spring mounted in :said first mentioned slotr and having curvedends conformingin out'- line tothe shape of saidhead and adapted to normally extend above 'the outline of said outwardly extending shoulder, an arm on one of said bent ends extending into said transverse slot, and keys extending through the alining openings in said tool head'and said handle and having their inner faces adapted to iit said lock' bar, andthe outer faces adapted to lit the contour of the upper portion of said transverse openings and having slots in the lower edge ofv said' keys into vwhich the laterally curved ends of said spring are adapted to engage to prevent transverse movement of said keys.

The combination with a handle, therv tang thereof which is provided fith a slot and a transverse opening in' communication therewith formed in the shape of large and! small intersecting cylinders, vand a'to'ol hav'- ing'a transverse' opening adapted'to aline with the larger portion of said opening said handle, ofV a. loekbar having a wedge adapted to fit said tapering slot,a head adapt; ed to fit said'smaller portion ofth'e'transverse opening, a slot longitudinally extend ingtherein, a spring in said'slot, and segmental keys adapted to embrace said 'wedge and extending through said larger'portion of said transverse opening in said handle and the opening in the tool having notches adaptedt'o beengaged by said spring for' the purpose ofv preventing transverse' mov'ei ment of said keys;V

6. InaV tool lock,`ahan`dle having a slot" terminating in an enlarged hole, a tool having an opening receiving the handle and a hole for registry With the handle hole, a locking element received in the handle slot, a pair of key members insertible in said registering holes and engaged With the opposite sides of said element, each of said key members having a notch therein, and yieldable means straddling the locking element and having its ends releasably engaged with the respective notches of the key members to hold the latter in place and to permit removal of the key members upon release.

7. In a tool lock, a handle having a slot terminating in a hole, a tool formed to receive the handle and having ahole for registry with the handle hole, a locking member in the slot, a key receivable in said holes and having a transverse cut-out, and spring latching means borne by said member and having a part movable into and out oit' engagement with the cut-out, and havingl a part to enable actuation thereof to more said first named part out of said cutout of the key.

8. In a tool lock, a handle having a hole and a tool formed to receive the handle and having a hole intermediate its top and bottom parts for registry with the hole in the handle, a slidable key insertible in said holes, and spring latching means for the key housed Within the handle and engageable with and disengageable from the key to hold the latter against sliding.

E). In a tool lock, a handle having a hole and a tool formed to receive the handle and ha rving a. hole for registry therewith, a key insertible in said opening, said key having a transverse notch, and a yieldable spring housed in the handle and having one end formed to engage in the key notch and having a part adjacent an end of the handle to allow of operation of the spring to release the key.

10. In a tool lock, a handle having a hole,

a tool formed to receive the handle and having a hole for registry with the handle hole, a key movable transversely of the handle and tool and into and out of said registering' holes, latching means engageable with and disengageable from said key, and means to enable release of said latching means from engagement With the key by imparting a mere thrust to the latching means.

l1. In a tool lock, a handle having a hole, a tool formed to receive the handle and having a hole for registry with the handle hole, a key movable transversely of the handle and tool and into and out of said registering holes, and depressible means transversely engaged with the key to removably latch same in place.

12. In a tool look, a handle having a slot terminating in an enlarged hole, a tool having an opening receiving the handle and a hole for registry with the handle hole, a locking element received in the handle slot, a pair of key members insertible in said registering holes and engaged With the' opposite sides of said element, each of said key members having a notch therein, and a spring held unitary latching member having means to simultaneously engage in the notches oi each of the key members.

13. In a tool lock, a handle having a transverse hole, a tool formed to receive the handle and having a transverse hole intermediate its top, bottom and end portions, a key slidable into and out of said holes, and releasable means to hold the key against sliding` and upon release to allow the key to be slid so as to be moved completely out or' both holes.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

HUGO A. ZEC/KENDORF.

Witnesses JOHN H. HERRING, l/V. `W. HEALEY.

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