US1508858A - Hollow metal last - Google Patents

Description

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Sept. 16, i924.

W. SANDBORG ET y AL.

Hottsow METALLAST Filed Maron 213/.

Patented Sept. 16, 1924.

UNITED STATES 1,508,858 PATENT OFFICE.

WILLIAM sANnBoRG, or BELMONT, AND ERNEST v. GRANLUND, 0T BosToN, MAssA- i, oHUsETTs.

HOLLOW METAL LAST.

Application led March 13, 1923. Serial No. 624,836.

T 0 all whom t may concern Be it known that we, WILLIAM SANDBORG and ERNEST V. GRANLUND, subjects of the King of Sweden, residing at Belmont and Boston, in the counties of Middlesex and Suffolk, respectively, and State of Massachusetts, have invented new and useful Improvements in Hollow Metal Lasts, of which the following is a specication.

The object of this invention is to provide a hollow metal last of extremely strong, durable, and relatively inexpensive construction, adapted primarily for use in manufacturing articles of footwear, composed mainly or in part of rubber which is vulcanized by heat while on the last, although the invention is not limited to this use, and may be embodied in a last adapted for use in makin articles of footwear which do not require vulcanization.

The invention is embodied in the improvements hereinafter described and claimed.

0f the accompanying drawings forming a part of this specification,

Figure l is a side elevation, showing a last suitable for use in making rubber boots.

Figure 2 shows in vertical section thefore and rear portions of the last shown by Figure 1, separated from each other, the leg portion being broken away.

Figure 3 is a section on line 3 3 of Figure 1.

Figure 4 is a section on line 4 4 of Figure 1.

Figure 5 is a section on line 5 5 of Figure 4.

The same reference characters indicate the same parts in all the figures.

The drawings show a last structure adapted for use in making rubber boots, the last including a fore art section, indicated as a whole by the re erence letter a, and a rear section indicated as a whole by the reference letter Z, said sections being separate from each other. The rear section b is extended upward to form a leg portion, indicated as a whole by b.

The fore section a includes two body members 27, united by a butt joint 28, on the median line of the last, a bottom or sole member 29, united to the lower edge faces of the members 27, and a supplemental angular end member 30, united to the sections 27 and 29, and including upper and lower portions which meet to form ya salient angle.

The rear section b is composed of` two ted together, and register with each other, j

the Vsection a is in its operative relation tO the section b. The members 30 and 34 are provided with offset portions 30a and 34a, forming a tongue-and-groove connection between the sections a and b, and preventing relative displacement thereof. The sections a ,and Z) are separably connected by the means next described.

36 represents a rod, movable endwise in the leg portion b', and having at one end an ear 37, adapted tol pass through coinciding slots 38 (Figure 5), formed in the angular members 30 and 34. The rod is adapted to be turned to move the ear 37 to the position shown by Figure 5, and by dotted lines in Figure 4, thus causing the ear to bear on a portion of the angularmember 30. The upper end of the rod is guided by an orifice in the top member 21, and is provided with a cam lever 38, pivoted at 39 to the rod. When the lever is turned to the position shown by Figure 1, it exerts an 11p-ward pull on the rod, causing the ear 37 to confine the section a in its operative position. When the lever is swung upward, the rod is released, and may be turned to withdraw the ear 37 from the slot 38, thus releasing the section a. Each of the members above described, excepting the rod and lever, may be ferrous sheet metal, and said members may be electrically welded together, to form'the last sections a and b.

The above-described connecting means cooperates with the angular end members and with the tongue-and-groove connection therebetween in rigidly confining the fore part section against displacement in any direction. Said tongue-and-groove connection ensures the coincidence of the slots 38 with each other when the sections a and b are assembled.

We claim:

1. A hollow last com rising a fore part section, composed of body members, a bottom member, and an angular rear end member, said members being of sheet metal and united to Jform a closed hollow structure, the angular rear end member having upper and lower portions meeting to form a salient an gle; a rear section composed of body members, a top member, a bottom member, and an angular forward end member, said members being also of sheet metal and united to form a closed hollow structure, the body members being'extended to 'form a leg portion surmounted by the top member, the angular forward end member having upper and lower portions meeting to form a reenvtrant angle, so that the forward end member is adapted to be seated on the rear end member, the said end members being provided ywith oiiset portions forming a tongueand-groo-ve connection between the two last sections; and securing means for releasably securing the fore part section to the rear section, said means cooperating with said angular end members and with the tongueand-groove connection therebetween in confining the fore part section against displacement in any direction.

2. A hollow boot last substantially as speciiied by claim l, the upper portions of said angular members being provided with coinciding slots which are. held in coincidence with each other by said tongue-andgroove connection, said securing means being embodied in a rod movable endwise in said leg portion, and provided at one end with an ear adapted to pass through said slots and to be turned into engagement with the upper portion of the said rear end member, and at the opposite end with a cam lever adapted to engage said top member.

In testimony whereof we have a-iiixed our signatures. I

VlQLLIAM SANDBORG. ERNEST V. GRANLUND.

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