US403580A

US403580A - Clasp-plate

Info

Publication number: US403580A
Authority: US
Publication date: 1889-05-21
Anticipated expiration: 1906-05-21

Description

(No Model.)

A. R. DICKINSON.

CLASP PLATE.

No. 403,580; Patented May 21, 1889.

UNITED STATES PATENT OFFICE.

AUSTIN R. DICKINSON, OF SYRACUSE, NElV YORK.

CLASP- PLATE.

SPECIFICATION forming part of Letters Patent No. 403,580, dated May 21, 1889. Application filed February 23, 1889. Serial No. 300,831. (No model.)

To all whom, it may concern.-

Be it known that I, AUSTIN R. DICKINSON, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Clasp-Plates, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates chiefly to clasps or buckles applied to arctic overshoes, rubber coats, and analogous articles; and the invention consists in the improved construction of a traiisversely-slotted catch-plate, with which the tongue of the clasp interlocks, said improved catch-plate being formed of a metal blank rolled with solid longitudinal marginal portions of greater thickness than the longitudinal central portion, as hereinafter more fully described, and specifically set forth in the claim.

In the annexed drawings, Figure 1 is a perspective view of the bar of metal from which the blank is formed. Fig. 2 is a perspective view of the blank. Fig. shows the blank provided with the requisite transverse slots, and 4: shows the catch-plate in its complete shape.

In the manufacture of my improved claspplate I first form a blank( shown in Fig. 2 of the drawings) by passing between suitable shaping-rolls a bar of metal (usually steel) of a shape similar to that shown in Fig. 1 of the drawings. By the process of rolling said bar I compress the longitudinal central portion, a, to its desired thickness, and at the same time increase the thickness of the metal along the longitudinal marginal portions 1) Z) thereof, so as to form solid and comparatively broad ribs thereon, as shown in Fig. 2 of the drawings. By thus fabricating the plate so as to displace the metal throughout the longitudinal central portion of the plate and forcing the metal toward the side edges the blank is not weakened, as it is where the edges of the blank are turned up to form the side edges of the plate. In the central portion, a, of the said blank I cut the transverse slots 0 c c, by means of a suitable press and dies, and then arch the plate, either by subjecting it to the pressure of curved dies or passing it between rolls. A catch-plate thus formed can be made at one operation, possesses greater stability, is more durable, more compact, neater in appearance than other plates of this class hitherto put on the market, and is also devoid of the sharp edges which are presented on other plates of this class when formed with flanges turned up from thin sheet metal, as has been done prior to my invention.

\Vhat I claim as new is- As an improved article of manufacture, a transversely-slotted clasp-plate formed of a metal blank with solid longitudinal 'rolled marginal portions of greater thickness of metal than the longitudinal central portion, as set forth.

In testimony whereof I have hereunto signed my name this 19th day of February, 1889.

AUSTIN R. DICKINSON. [L. 8.]

Witnesses:

C. H. DUELL, MARK W. DEWEY.