Untitled record

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N. PETERS. PHOTO-MTHOGRAPHER, WASHINGTON, D. C.

S. E. CHUBBUCK, OF ROXBURY, MASSACHUSETTS, ASSIGNOR TO JOSEPH H. CHADWICK, OF SAME PLACE.

Letters Patent-No. 65,173, dated May 28, 1867.

IMPROVED MACHINE EOR CUTTING SHEET LEAD.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, S. E. CHUBBUCK, of. Roxbury, in the county of Norfolk, and State of Massachusetts have invented a new and improved’ Means for Cutting Sheet Lead during the process of rollin- the same · and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable o ers skilled m the art to make and use the same, reference being had to the accompanying drawings formnig part of this specification. ^v °

Sheet lead is at present manufactured by rolling heavy lead plates into sheets of the required thickness heavy-pressure rollers being employed for that purpose, arranged with a long bed provided with friction-rollers’ to admit of the lead bemg readily passed back and forth between the rollers. These plates, as they are rolled of course greatly increase in.length, and long before they are reduced or drawn out to the proper or desired thickness become unwieldy and difficult to manage, and are necessarily cut transversely into two part/and each part rolled or milled separately. ’ . My invention relates to a new and improved means for cutting the sheet lead transversely during the rolling or milling process, whereby said work may be done with the greatest facility. In the acco’mpanvino· sheet of drawings— ” °

Figure 1 is a vertical section of my invention, taken in the line x x, fig,· 3..

Figure 2, a vertical section of the same, taken in the line y y, fig. 1.

Similar letters.of reference indicate like parts.

A represents a bed of any suitable ol· desired length, .having friction-rollers a inserted in it to admit of' the lead being readily passed back and forth between pressure-rollers, in order that it may be rolled or drawn out to the proper degree of thinness. These parts are of usual construction, and .therefore do not' require a minute description.- B represents a vertical tube, which is at the lower part of a bracket, C, the lipper end of the latter being provided with cross-heads b J, which are fitted in guides D D, placed transversely over and a suitable distance above the bed A. A rack, E, is secured to or cast with the bracket C, said rack being parallel with the guides D D, and having a pinion, F, gearing into it, the shaft G' of said pinion havine its bearing e on the guides- D D. The tube B, bracket C, and rack E are of metal, and may all be cast in one piece, and Within the tube B there is placed loosely a rod or arbor, G, in the lower part of which a circular rotary cutter, H, is fitted. In the tube B, above the rod or arbor G, there is placed a spiral spring, I, the lower endof which bears on the top G, and the upper end is attached to or bears against a .disk, d, underneath a screw J which passes through the upper end of tube B. The spring I.is compressed, and consequently made to act or bear upon G with a greater or less degree of pressure, by turning or adjusting the screw J, the downward movement of the rod or arbor G being regulated.by a screw, K, which passes laterally through t'he.tube B into a slot e in the side of G, as shown clearly in fig. 1. The cutter H works over a bar, L, placed transversely in the bed A, and this bar may have a metal strip, / inserted in it longitudinally. The cutter is.not allowed to bear upon this metal strip, the screw K admitting of the cutter just touching it so that the edge of H will not be blunted or deprived of keenness.

The operation will be very readily understood. When the sheet of lead requires to be cut transversely, the cutter H is moved back and forth over it by operating a crank, M, at one end of the shaft G, the spring*! forcing tho cutter through the sheet lead. When the cutter is not required for use, it is moved to one side of the bed A.