US54580A - Improved apparatus for punching corrugated metals - Google Patents

Description

NITED VSTATEs PATENT OEEIcE.

MARY JANE MONTGOMERY, OF YORK, N. Y.

lMPROVEDVAPPARATUS FOR PUNCHING CORRUGATED METALS.

Specification forming part of Letters Patent No. 54.580, dated May S, 1866.

vTo all whom it may concern:

Be it known that I, MARY J ANE MONTGOM- ERY, ot the city, county, and State of New York, have inventeda new and useful Apparatus for Punching Boltor Rivet Holes in Oory Y ruga'ted or Curved Metals; and I do hereby declare the followl'lg to be a full and exact description thereof, reference being had to the aecompal'iyin g drawings, and to the letters of reference marked thereon.

Much difficulty is well known to exist in making bolt or rivet holes by ,an y of the ordinary or commonly-used processes in corrugated or curved metallic sheets, plates, or beams when the-holes are required to bemade through the curve or corrugations 'and trailsverse to the line of the curve or corrugations.

The object ot' my invention is to enable the operatoror workman to do this with as much facility and certainty in the line of direction of the holes as it' he were operating upon a plain or iiat sheet or plate of the same metal. In the drawings forming a pa rtof this specification and hereto attached, Figure I shows the tool l use with a portion ot' a straight corrugated beam-iron passed through it. Fig. II is a section ot' this tool through the lme a .fr of Fig. I. Fig. III shows the tool applied to a curved corrugated beam or sheet, and Fig. IV a portion of the beam or sheet with the holes punched therein. l

In all these figures the same letter refers to the same part. p

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

The tool A, Fig. I, is made in two sections, a a', as seen in Fig. II, with undulating surfaces adapted to the corrugations or curved surfaces ofthe sheet or beam, and with an interval between their faces corresponding to the thickness of the said sheet or beam. These two sections are adjusted to each other at this distance, and heldin place by means of a plate on each side, (marked 111),) Fig. Il. Through these platesand the interlocking waved surfaces of the two sections a a a straight hole is made to receive the punch or punches c c.

In using the apparatus or tool, the curved or corrugated sheet or beam is passed into the space between thel two approximatingt'aces of a and a to the distance required, and the punch or punches c c driven through its passway from b to b, or from one face ot' the tool to the other, carrying with it the'plug ofmetal. which it displaces from each one ot' the corrugations or curves ot' the interposed plate or beam. As the direction ot' the panch cannot diverge from that given it by the hole in which it moves, it is evident that the holes made in the sheet or beam must exactly correspond with each other in all their curves or corrugations, as shown in the side of one ot' them in Fig. IV. When it is necessary to punch holes in two beams or sheets, one lapping over or into the other, the interval between the parts a and a', as shown in Figs. II, must be increased sufficiently to receive these together.

It maybe necessary sometimes to apply this apparatus to curved beams or sheets, as shown in Fig. III. If this curvature be uniform from one end or" the beam or sheet to the other, then its curvature will have to be made the same; but it' the beam or sheet be curved at only oneplace and the rest straight, or nearly so, then, to enable the tool to pass over the whole length, its outer ends must be made with a -Haring mouth,and the orifice for the punch at M. JANE MoNTeoMERY.'

Witnesses:

HKING, RICHARD MONTGOMERY.

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