US1261781A - Hinged last. - Google Patents

Description

C. C. DUDGE.

HINGED LAST. APPLICATION HLED AUG. H. HHS.

1 ,26 1 ,781 Patented Apr. 9, 1918.

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cmLES C. DODGE, OF WORCESTER, MASSACHUSETTS.

HINGED LAST.

Specication of Letters Patent.

Application led August 11, 1915. Serial No. 45,019.

To .all 'whom it may concern Be itA known that I, CHARLESV C. Doven, aciti'zen of the United States, and resident of Worcester, in the county. of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Hinged Lasts, of which the following is a specification.

This invention relates to hinged lasts, and its object is to rovide an improved hinge structure there or. The hinge comprises two coperative hinge members formed to be connected b hookin one into the other, and to be capa le of re ative angular movement, and a spring arran ed to hold them in coperative relation. vhen the lastV is straightened for use, the force of the spring holds the last in straightened condition; an when one of the parts of the last is moved relatively to the other to shorten the last, the spring is moved so that its center line crosses the axis of the hinge, and the spring then holds the last in its shortened condition. The hinge structure is such thatit is ca able of being assembled in coperative re ation together with its spring before the hinge structure is assembled with the last and is therefore capable of being inspected, tested and otherwise handled as a complete, operable, self-contained unit before it is set in a last. The manufacturer of the hinge structure is therefore enabled to observe any defect in the operation of the hinge structure before the latter goes to the last mann facturer, and the handling of the hinge structure by the last manufacturer is facilitated if the hinge structure is assembled when it is received by him, because the operation of setting the hinge structure in the last does not necessitate taking apart the hinge structure.

Of the accompanying drawings, which illustrate one form 1n which the invention may be embodied:

Figure 1 represents a plan View of ablank of ductile sheet metal from which one of the hinge members is formed.

Fig. 2 represents a top plan view of a hinge member formed from a blank such as that shown by Fig. 1.

Fig. 3 represents a view of the assembled hinge structure including the spring, one of the hinge members being shown insection and the other one being shown in elevation.

The angular position of the hinge members corresponds to the angular position of theV Fig. 6 represents an end elevation of the.

hinge member shown by Fig. 2.

Fig. 7 represents an edge view of the hinge member which is shown at the right of Figs. 3 and 4.

Fig. 8 represents a side elevation of a last adapted to take the hinge structure shown by Figs. 3 and 4, the hinge-receiving sockets belng indicated by dotted lines.

Fig. 9 represents a longitudinal section of the last shown by Fig. S, showing the hinge structure assembled therein.

YFig. 10 represents a sectional view through the structure intersected by line 10-10 of Fig. 9, the spring being omitted.

Fig. 11 represents a section through the structure intersected by line 11-11 of Fig. 9.

Fig. 12 represents an enlarged view of the interengaged portions of the two hinge members.

The same reference characters indicate the same parts wherever the occur.

The blank 15 shown y Fig. 1 may be stamped from ductile sheet metal by a sin gle operation of a die press. The longitudi- V nal portions 16, 16 of the blank are connect.- ed at one end by a bridge portion 17, and at the opposite end by a bridge or rocker portion 18. The Side portions are punched to provide holes 19, 19 for the reception of a pin whereby the member may be anchored in one of the parts of the last. A tongue 2O is formed upon the member 15 to provide a seat for a helical compression spring, the edge portions 21-21 of the tongue affording the said seat. The projection 22 between the edge portions 21, 21 is adapted to extend into the spring to keep the latter centered with relation to the member 15. The side portions 16, 16 of the blank are offset as indicated atr23, 23, for the purpose of making the hinge member wide enough to Patented Apr. 9, 1918.

V435 of the hook member.

receive the spring and also to make the member relatively narrow at the end which is to be interengaged with the other hinge member.

In the process of forming the blank l5, the side portions 16, 16 are bent toward each other into Substantially parallel relatlon, the o fset ortions 23 are bent as indicated at 23 in ig. 2, and the tongue 20 is bent as shown by Figs. 3, 4 and 9. As a result of this operation the pin-receiving holes 19 are brought into line with each other, and a chamber 24 (Fig. 2) is provided for the reception of the spring.

The other hinge member is in the form of a hook, and comprises a hook portion 25 and a shank portion 26. For the purpose of identifying the two hinge members, the member 25, 26 is hereinafter termed the hook member because of its hooked formation, and the member shown by Fig. 2 is termed the staple member because of its staple-like form. The hook member may be formed from sheet metal by a single operation of a die press. The shank portion 26 is punched to provide a pin-receiving hole 27 whereby it may be anchored in the last. The hook portion is formed to receive the bridge portion 18, and the crotch of the hook portion as defined by the curved edge 28 (see Fig. 12) aiords a seat for the edge 18 of .the bridge portion 18. The center of the curved edge 28 is indicated at 30 in Fig. 12, and this center is the axis of relative angular movement of the hinge members.

A, helical compression sprin 31 is arranged in the chamber 24, an its end 32 is seated upon the edge portions 21. The other end portion 33 is bent so as to intersect the axis of the spring, and is seated in a notch 34 between two projections 35,

The spring performs three distinct functions, namely, it keeps the rocker portion 18 seated in the crotch of the hook portion, it holds the hinge members in the angular relation shown by Fi 3, and it holds the hinge members in t e angular relation shown by Fig. 4. The notch or seat 34 is so arranged that it crosses the line which intersects the seat 21, 21 and the axis 30 of angular move ment, when one hinge member rocks upon the other.

The side portions 16, being relatively close to each other at the end which receives the hooky portion 25', hold the hook member so that the vtwo members will not tip laterally with relation to each other.

The forepart 36 and heelpart 37 are formed with coperative, ortions which Tprovide a knuckle joint, the eelpart having companion knuckle portions 38 and the forepagfhaving a. socket 39 in which the por- 138 are arranged. The forepart and heelpart may be integral when the last is turned, and then cut apart by a band saw. In the process of sawin the last to form the knuckle portions 38 an socket 39, I refer to start the operation at the point indicated at 40 in Fig. 8 and to progress in the direction of the arrow, stopping at the point indicated at 41. I then saw into the bottom oi' the last to form the confronting faces 42 and 43, leaving an appreciable amount of stock 44 between the latter and point 41. I then break the narrow web of uncut stock by holding the last by one end and striking a light blow upon the other end. The uncut stock 44 is thus left to keep the bottom sur faces of the two parts Hush when the last and hinge are assembled. I then saw into the knuckle portion in a plane from to to bottom, to divide the knuckle portion into two sections. A hole is drilled into the heelpart to provide a socket 45 for the reception of the shank portion 26 of the hook member. A hole 46 is bored to receive a pin 47, said pin being driven through the hole 27 in the hook member to anchor the latter in the heelpart. A socket 48 is bored in the forepart to receive the sta le member and spring, and a hole 49 is ored through the forepart, intersecting the socket 48, to receive the pin 50, said pin being driven through the holes 19, 19 in the staple member to anchor the latter in the forepart. The diameter of the socket 45 is substantially equal to or slightly less than the depth of the shank portion 26, and consequently, in order to insert the shank portion into the socket, it is necessary to drive it with considerable force because the four edges 51 of the shank portion will indent the wood as shown by Fig. 11. In consequence of driving the shank portion into the wood as just explained, the hook member is held so firmly that it will not be capable of twisting about the axis of the socket. In like manner the staple member of the hinge and the socket 48 therefor are proportioned so that considerable force will be required to drive 'the staple member into the forepart, the four edges 52 of the staple member being caused to indent the forepart, as shown by Fig. '10,

When the last and hinge structure are as-4 sembled, the axis 30 (Fig. 12) of the. hinge structure coincides with 8) of the knuckle joint. While the forepart and heelpart remain in the relation shown by Fig. 9 their confronting faces 42 and 43 are pressed against each other by the force of the spring, and when one of the parts of the last is moved relatively to the other to slierten the last, the surfaces 54 and 55 are brought into contact with each other and pressed against each other by the spring.

The elect of the spring in holding the last in its two angular positions is substanthe axis 53 (Fig...

tially equal. The holding effect, however, when the last is straightened, is supplemented by the edge fofthehook member and edge 57 of the'staple member. The ed e 56 intersects slightly the arc traversed y the edge 57, and it is therefore necessary to apply considerable'force to the forepart and heelpart. in order to move the surfaces 472 and 43 into abutting relation. so applied causes a wedging action of the edge 57 against the edge 56, and these two edges are consequentl forced against each other with a substantial degree of pressure which causes them to have a frictional holding effect.

I claim:

l. A last hinge comprising two angularly movable members one of which has a rocker portion and the other of which has a crotched bearing portion, said rocker portion being seated in said crotched portion to form hinge-connection between said members, and a spring arranged to act on said members to keep said rocker portion seated in said crotched portion.

2. A last hinge comprising two angularly movable members one of which has a rocker portion and the other of which has a hook portion, said rocker portion being seated in the crotch of said hook portion, and a spring arranged to act on said members to keep said rocker portion seated in said crotch.

3. A last hinge comprising two angularly movable members one of which has confronting shank portions separated from each other and a brid e portion connecting said shank portions, t e other one of said members having a hook portion, said brid e ortion being seated in the crotch of said iiook portion, and a spring arranged between said confronting shank portions and acting upon said members to keep said bridge portion seated in said crotch.

4. A last hinge comprising two angularly movable members one of which has a rocker portion and the other of which has a hook portion, said rocker portion being seated in the crotch of said hook portion, said members having surfaces arranged to coact with each other to limit the relative angular movement of said members, and a spring arranged to act on said members to hold them in a predetermined angular relation with said coactive surfaces against each other.

5. A last hinge comprising two angularly movable members one of which has a hook portion, said hook portion having a substantially U-shaped crotch, the other one of said members having two coperative shank portions and a bridge portlon connecting them, said bridge portion being seated in said crotch, and a helical compression s ring seated against said two members an ar- The forceY ranged to kee said bridge portion seated in the said crotch.

G. A last hinge comprising a staple member, a hook member the bridge portion of said sta le member being arranged to bear and roer in the crotch of said hook member, and a spring arranged to exert stress upon said members to keep said bridge portion in said crotch.

7. A last hinge comprising a staple member, a hook member, the bridge portion of said staple member being arranged to bear and rock in the crotch of said hook member, said members having confronting spring seats, the said seat of said hook member being between said crotch and the said seat of said staple member and being movable across the line intersecting the latter said seat and crotch, in consequence of relative angular movement of said member, and a helical compression spring arranged on said seats to keep said bridge portion seated in said crotch.

8. A last hinge comprising a staple member, a hook member, the bridge portion of said staple member being arranged to bear and rock in the crotch of said hook member, the sides of said staple member being arranged to bear against the sides of said hook member to prevent relative twisting of said members, and a spring arranged to act on said members to keep said bridge portion seated in said crotch.

9. A last hinge comprising two angularly movable members having respectively cooperative interengaged hook and staple portions adapted to rock upon each other, and a helical compression spring seated upon said members and arranged to kee said portions interengaged in hinged re ation, said members having spring-engaging means arranged to shift said spring laterally across a dead center in consequence of relative angular movement of said members, whereby said spring is caused to oppose such movement toward said dead center from either side of the latter.

10. A last hinge comprising two angularly movable members having respectively coperative interengaged hook and staple portions adapted to rock upon each other, and having cooperative friction surfaces arranged to be moved into and out of engagement with each other by relative rocking www forepart and heelpart capable Vof relative hook, and the ohe Vone of sad'inem 12, In combination, a last comprising a. heelpart, one of seid members angular movement about an axis'while repivotally engagin said hook. Y

:naming in contact, and a hinge connecting In testimony' w ereof I have eixed my 5 said forepart and heelpart, said hinge comsignature. Y

prl'ing two singularly movable members fastened respectively to said forepart and. CHARLES C. DGDGE.

Copies of thin patent may be obtained for ave cents eaqh, by dressing the Uommlslioner of hun!! Washington, D. C. i

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