US938903A - Last-lock. - Google Patents

Description

' F. J. SHAINSEY, SR;

LAST LOCK."

APPLICATION FILED FEB.24,1906.

Patented Nov. 2, 1909.

Mai/095565.-

UNITED TES PATENT FREDERICK Jenn SHAINSEY, sn, or DAYTOLLOHIO, AssIeNon, BY hrn'snn ASSIGN- MENTS, TO KRENTLER-ARN'OLD HINGE LAST COMPANY, OF'DETBOI'L'MiCHIGAN, A

CORPORATION OF MICHIGAN'.'

To all whom it may concern: 1 Be it known that I, FREDERICK JOHN SHAINSEY, Sn, a citizen ofUnit'ed States,-

residing at Dayton, county-of Montgomery, State of Ohio, United States, have invented an Improvement in Last-Locks, of .which the following description, inconnection with the accompanying'drawings, is a specification, like letters on the drawings represent-r like parts.

in 4. %n that class ofdivided lasts in which the heel-part has a swinging movement with relation to the forepart it is sometimes desirable to' maintain the last unyielding lengthened position, and for this pur ose various forms of locking devices-have eeri devised, many of them-being more or less complex and liable to wear out rapidly,

difiicult of accurate insertion, or .--e ensive. My present invention aims to obviate the above named disadvantages while at the same time providing an automatic device .-which cannot readily get out of order.

The structural details of my invention will be pointed out more at lengthin the course of the following description, reference being had to the accompanying drawings, in whichl is shown a -vent1on.

preferred-embodiment ofmy in- In the drawing, Figures 1 and 2 are views in side-elevation, showing the last in lengthened position and collapsed or shortened position respectively, the middle portion of the last being broken away toshow .the

hin ing and locking construction in detail.

'l he forepart a and heel-part b are herein shown as'jointed in the manner commonly known as the 2-piece last construction or knuckle joint, as shown in Patent 608,006

of July 26, 1898, the forepart having twin knuckles seating in a recess in the heel-part, and joined by a hinge-plate 0 set vertically of a circle, as indicated at 2', and receives the circular end 7: of a tongue'or plate m, whose shoulder n'is caused to normally en age the adjacent portion of the hingelate by reason of a spring 8 held in notches between the normally separated lower edge of the LAST-Lock. I

' Specification of Letters Patent.

. Application filed February 24, 1906. Serial No; 302,678.

be collapsed into the positionshow-n in Fig.

ling device will endure as long as the la'st, I v

1 r'atented oe. 2,1909.

late m1 and top edge ei the plate c so as to engage a transv d of the forepart a., v 1 v The above construction affords an abso- 4 lutely positive and exceedingly strong. lock,

. '60 simply a portion of the original plate from f which the hinge is stamped or died -out,:and j withouti material 00st"; The plate m is is held in place by the converging circular wallsof the opening 2', so that it cannot pull i out-lengthwise, and is held in place against lateral shifting by the walls of the Ikerfe, which the Hinge-plate c snugly fits. No" lateral .twistin or springing of the lockin plate-m can ta e place, because itsforwar end is retained in the kerf d. The spring 8 cannot get out of place because it is retained, not only by the upper and' lower holding- ,notches, but also by the, side wallsof the 1 qkerf d, and yet it is always free to exert its" upward pressure.

parts of the last and depresses the-tongue m" slightly, whereupon the last may readily 2. Upon straightening out or lengthening the parts of the last from the position shown in Fig. to the position-shown in Fig. 1, the ton e m immediately springs up into locking enga em'ent with the pin 3; when 85 the last isful y lengthened. Preferably the arrangement is such that the-pin p and the center of the socket portionla are in a line tangential to the pivotal center f, the strain being in a direction between the twoiris hand 9, thereby distributing the strain to the best advantage. p It will be understood that my invention may beapplied to any of the various hinged last connections employing a vertical kerf and bondingumeans moving "thereinv. By having the locking tongue or compression brace m and the hinge-plate in one-and the same plane and bearing directly against each 19 ment I attain at once great strength'and other, according to my preferred embodi simplicity and avoidjundue' wear I of the parts. There is no wedging partbearing on the wood of the last, andihencefthe-lock' The interlocking arrangementmay" be' varied in shape of parts, as long as-the mainfeatures, as above ppinted out, i

erse stop-pin p the kerf In use the jack is provided with: a suitable zfinger, which enters the gap between the'two will be understood that my invention may be carried out in a wide variety of embodiments within the spirit and scope of the appended claims. I

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

1. In a transversely divided last, having its heel-part movable relatively to the forepart, said two parts having vertical kerfsin their adjacent ends, connecting means including a rigid plate secured in said kerfs to said forepart and heel-part respectively, and a rigid compression member pivoted 1n the plane of said kerfs, carried by and movable with and also relatively to said plate and adapted to lock the parts of the last r g dly extendedwhen in one position, and to permit the free collapsing movement of said 2 last-parts when in another position.

2. In a transversely divided last, having, its heel-part'movable relatively to the forepart, said two parts having vertical kerfs in their adjacent ends, connecting means includin a rigid plate secured in said kerfs 1 to sai forepart and heel-partrespectively', v-and a movable locking mechanism pivotally, mounted in the plane of said kerfs, carried by and movable with and also relatively to said late and adapted to lock the parts'of the ast rigidly extended when inone position, and'to permit thefree collapsing movement of said last-parts when in another position, said locking mechanism having its pivot and its opposite locking end both substantially in the arc of swinging movement of the last parts, being externally operable and'incl'ud- .1ng a spring-normally tending to move the same into locking position.

40 3. In a transversely divided last, having its heel-part movable relatively to the forepart, said two parts having vertical kerfs in their adjacent ends, connecting means .in-

cludi' a rigid plate secured in said kerfs' to sai forepart and heel-part respectively,

and a rigid compression member pivoted in 'the'plane of said kerfs {carried by and movable with and also re atively to said plate and adapted to extend from one last part to the other and to brace against'said last part and thereby to lock the last rigidly extended when in one position, and to per-- mitthe free collapsing movement of said lastarts when in another position, said locking mechanism being externally operable.

4. In a transversely divided last, having an open s we at the'top in the line of di vision an vertical kerfs. in the adjacent ends, connecting means secured in said kerfs to the forepart and heel-part respectively, a lockin device mounted in said kerfs and extending across said open space into both said rfs above said connecting means, said 7 last pgrts, and a transverse pin in one of device, when the last-parts are in lOCklli? exten ed-position, bracing rigidly between said pin at one end in one last-part and the connecting means at the other end in the other last-part, said locking device being adapted to be deflected downwardly within the last to permit the parts of the last to have movement one relativel to the other.

5. In a transversely divi ed last, having an open space at the top in the line of diextending into said open space, a transverse vision and vertical kerfs-in the adjacent connecting means secured in sald kerfs ectively,

pin in one of said kerfs .above said connectmg means, and a spring normally tendin to move said locking device outwardly, sai

locking device, when the last-parts are in extended position, bracing rigidly between said pin at one end in one last-part and the connecting means at the other end .in the other last-part, said locking device being ada ted to be deflected downwardly within the ast in opposition to said spring to permit the parts of the last to have movement i one relatively to the other.

6. In a transversely divided last, having an open s ace at the top in the lineof d1- vision an vertical kerfs .in the adjacent ends, connecting means secured in said kerfs to the forepart and heel-part respectively,

a locking device mounted in said kerfs, having pivotal connection at one end with said connecting means to move with one of said' last-parts, and extending into said open space, a transverse pin in the other of said last-parts in position to be engaged-by the front end of said locking device'when the last-parts are in extended position, and a spring normally tending to move said looking device into said enga ed position to lock the last-parts unyielding y together when in' I said extended position.

7. A divided last, having a vertical hingearts of the last, Y

of said plate,

plate pivotally joining the containing a socket in one e e a rigid locking tongue movaily retained to swing in said socket adjacent one last part, and a transverse stop-pin extending trans versely. through the opposite last part across the end of said tongue when the last is in lengthened osition. 1

8. A d1v'i ed last having a vertical hingeplate pivotally joining the parts of the last, containin a socket in one edge of said plate, a ocking tongue movably retained to swing in- Sald' socket, a. transverse stop normally in the path of said tongue and a spring between the adjacent edges of said tongue and tongue in posltion to engage said sto 9. A divided last having a vertical hingeplate and a'rigid lockin plate attached to said hinge-plate, said Iocln'ng plate plate, normally holding said 938,903 &

hinge-plate being movable i-elatively'ahd 'both last parts at its opposite ends respeo- 10 also together and both standing in the same tively. vertical plane in the last, and opposite kerfs In testimony whereof, I have signed my in the forepart and heel-part respectively, name to this specification, in the presence of constituting the entire means of holding said two subscribing witnesses.

combined hinge and lock against relative FREDERICK JOHN SHAINSEY, SR. lateral movement out of said vertical plane, fitnesses: said locking plate lying above the top edge W. H. H. Eom,

of the hinge-plate and engaging at all times MAY B. MA'rHER.

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