US171358A - Improvement in machines for trimming and punching roofing-slates - Google Patents

Description

E. ,R. DAVIS. MACHINE FOR TRIMMING Am PUNCHING ROOFING-SLATE.

Patented nee. 21,1875.

O-UTHQGRAPHER WSHINGTON. U C.

UNITED STATES PATENT OFFICE.

EBENEZER R. DAVIS, OF DETROIT, MICHIGAN.

IMPROVEMENT lN MACHINES FOR TRIMMING AND PUNCHING ROOFING-SLATES.

Specification forming part of Letters Patent No. 171,358, dated December 21, 1875; application filed October 19, 1875.

To all whom it may concern:

Be it known that I, EBENEZER R. DAVIS, of Detroit, in the county of Wayne and State of Michigan, have invented an Improvement in Machines for Trimming and Punching Roofing-Slates, of which the following is a specification:

My invention has for its object to furnish a machine with which a roofing-slate may be trimmed, and the nail-holes punched at a single operation.

The invention consists, principally, in securing the adjustable cutters and punches to a single hinged frame; further, in combination, with the main stationary frame carrying adjustable bearers and punch-holes, of the hinged frame carrying the adjustable cutters and punches, and adapted to be operated by hand; and, further, in the combination ofthe operative parts, all as more fully hereinafter explained.

Figure 1 is a perspective view. Fig. 2 is a plan view. Fig. 3 is an enlarged vertical section of one of the punches.

In the drawing, A represents the main frame, to the rear upper part of which the cutting-frame B is hinged. O G are two bearers, adjustably secured across the front and back girts of the frame by bolts to, through slots in said girts, so that the said bearers can be adjusted to or from each other, according to the width of the slates to be trimmed. The bearer O has one side turned up, as at forming a guide-flange for one side of the slate, which is laid against it. D is a guide, adjustably secured to the front girt between the bearers, whose front ends may be beveled to cut half-hexagon slate, as shown, or any other form desired. The outer edges of the beveled ends of the bearers are flanged upwardly, and sharpened to form cutting-edges b. The cutting-frame B is a structure composed of two parallel iron bars set up edgewise, bent to form three sides of a frame, with spacerblocks between the bars, which are tied 'by bolts through the said spacer-blocks. E E are the cutters, adjustably secured under the frame diagonally across its corners, so as to bring their cutting-edges 0 just outside the cutting-edges of the bearers below. F is a handle across the front edge of the cuttingframe, which can thereby be lifted up or thrown forcibly down, the impact upon the front girt of the main frame being eased by rubber buffers d on the upper surface of said girt.

To trim a slate the latter is laid on the bearers', one edge bearing against the guide 0 and the front end against the guide D, when the cutting-frame may be thrown down, whereupon its knives E E will shear off the corners of the slate in line with the cutting-edges b of said bearers. To punch the nail-holes in the slate at the same operation each bearer is provided with an anvil, Gr, longitudinally adjustable in a slot therein, each anvil having an oval hole through it. Across the top of the cutting-frame a crossbeam, H, is jacked, said beam being constructed like the cuttingframe of two parallel iron-bars set up edgewise, and may be moved forward or back by looseningitsjack-bolts. I are nail-hole punches, each having a screw-shank, which is inserted up through the slots of the cross-beam, where it receives a wing-nut, I, which secures it in position to have the point enter the anvilhole, first passing through the slate, as seen in Fig. 3. A spring, J, spirally coiled about the punch, forces 011' the slate when the punch is raised.

What Iclaim as my invention is- 1. In a machine for cutting and punching roofing-slates the combination of the adjustable cutters and punches secured to a single hinged frame, substantially as described and shown.

2. In a machine for cutting, and punching roofing-slates the combination of the frame A, carrying adjustable bearers and punch-holes, with the hinged frame B, carrying adjustable cutters and punches, and adapted to be operated by hand, in the manner substantially as described and shown.

3. In a machine for cutting and punching roofing-slates the combination of the frame A, carrying the adjustable bearers O O, adjusta ble guide D, and adjustable anvils G of the hinged frame B, carrying the adjustable cutters E, adjustable punches I, springs J, and I handle F, all substantially as described and shown.

EBENEZER R. DAVIS. Witnesses:

v H. F. EBERTS,

H. S. SPRAGUE.

Images