US30925A

US30925A - Apparatus for cutting buttonholes

Info

Publication number: US30925A
Authority: US
Publication date: 1860-12-18
Anticipated expiration: 1877-12-18

Description

UNITED STATES PATENT OFFICE.

FREDERICK C. LEYPOLDT, OF PHILADELPHIA, PENNSYLVANIA.

APPARATUS FOR CUTTING BUTTOl\TI-IOI.|IE.S.`

Speccaton forming part of Letters Patent No. 30,925, dated December 18, 1860; Reissued July 12, 1864, No. 1,728.

To all whom it may concern:

Be it known that I, FREDERICK C. LEY- POLDT, of the city of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Instruments for Cutting Buttonholes; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon. j

My invention relates to that kind of buttonhole cutters, which are composed of a pair of levers and operated in the manner of ordinary scissors.

It consists in an improved manner of combining the cutter with said levers, whereby a greatly increased leverage is obtained and the pressure equally divided over the whole length of the cutting edge.

To enable others skilled in the art to make and use my invention I will now proceed to describe its construction and operation.

On reference to the drawing forming part of this specification and in which the same letters of reference allude to similar parts throughout the several views: Figure 1 is a side elevation of my improved cutter; Fig. 2 a plan, and Fig. 3 an end view of the same.

A is the bottom lever; it is forked at the cutting end in the manner seen at Fig. 1, the lower prong ZJ forming the die against which acts the cutter B, while the upper projection c is arranged to receive and guide the latter; to the end of cis further hinged by means of fulcrum pin Z the upper lever C, which actuates the cutter B by means of links e, e.

In the instruments for cutting buttonholes, manufactured under the patent of Halsey D. Walcott, (dated July 27, 1852) the cutting edge is attached directly to the upper lever and the latter jointed to the lower lever at a point beyond the open space D in the manner of ordinary scissors. This open space D being necessary to permit the piercing of the buttonholes at any usual distance from the edge of-the cloth, it will be easily understood that in those instruments the fulcrum is thus removed inadequately Vfar from the cutting surface; another serious defect in the above instrument is the direct attachment of the cutter to the upper lever, whereby the extreme ends of the cutting edge receive an unequal amount of pressure and motion, the least inaccuracy in the sur- 1 faces of the die and cutting edge causing the instrument to work indifferently.

By my improved mode of jointing the levers A and C I am enabled to place the fulcrum CZ at the most suitable distance from the cutter for obtaining increased power, and it will further be seen, that by connecting the cutter B with lever C through the links c c, the pressure is equally divided over the whole cutting surface and a perfect FREDERICK C. LEYPOLD'I.

Witnesses:

THEODORE BERGNER, JOHN REIs'r.