US271204A - Machine for cutting printersj rules - Google Patents

Description

R.. S. R'OBSON MACHINE FOR CUTTING PRINTERS BULBS.

(No Model.)l

NITED STATES PATENT OEEICE.

' ROBERT STOWE ROBSON, OF GAMBRIDGEPORT, MASSACHUSETTS.

MACHINE FOR CUTTING PRINTERS RULES.

SPECIFICATION forming part of Letters Patent No. 271,204, dated January 23, 1883.

Application tiled December 18. 1892. (No model.)

To all whom it may concern Be it known that I, ROBERT STOWE 'ROB- SON,` of Gambridgeport, in the county of MiddleseX, of the Commonwealth ot' Massachu-V setts, have invented a new and useful Improvement in Machines for Cutting Printers Rules; and I do hereby declare the same to be -described in the following specification and represented in accompanying drawings, of which- Figure lis a top view, Fig. 2 a front end elevation, Fig. 3 a rear end elevation, and Fig. 4 a side view, of a machine embracing my invention,the nature of whichis defined in the claims hereinafter presented. Fig. 5 is a transverse section, and Fig. 6 a longitudinal section taken through the movable bed and its adjustable clamp-gage. Fig. 7 is a front view ofthe movable knife.

In the said drawings, A denotes a standard or frame for supporting the main operative parts of the machine. Within this frame, and adapted to it so as to move vertically in it, is a cutting-knife carrier, B, which has fixed to it a knife, C, whose-lower edge is its cutting-edge, and is made obtuse angular, as shown. There is pivoted to the frame or standard A a cam-lever, D, whose cam a bears on the top ot' theknife-carrier. The shorter arm of the lever is fiat, and projects down from the lever in front ofthe knife-carrier, and there is in such arm a curved slot, c, through which a stud, d, from the knife-carrier projects. Furthermore, there is applied to the lever and the frame A a spring, e, for turning the lever so as to force its longer arm upward, and thereby, by means of the slot c and stud d, cause the knife-carrier to rise relatively to a stationary rest or bar, f, arranged in the stand. In front of this rest or bar f there is what I term the adjustable bed77 E, which is a flat arm pivoted at or near its inner end to the frame or standard A. From the arm, and concentric with one of its pivots, there projects downward a semicircular extension, F, provided with a curved slot, h, to receive' a clamp-screw, G, which, arranged in the slot, screws into the stand A. A semicircular and divided limb, H, projects upward from the part F against an index-pointer, I, attached to the frame A. This limb H and pointer I serve to indicate the angle of inclination of the bed E, the clampscrew and slotted extension answering to fix the bedin any angular position within the range of its motion. For convenience of holding the bed raised at different altitudes, I provide the extension at its periphery with teeth 7c and the frame A with a weighted catch-lever, l, to act with such teeth.

.Arranged lengthwise on the adjustable bed E is a clamp-bar, K, having projecting Yfrom the middle of its lower side and extending from one to the other end thereof astraight tongue, m, which enters a corresponding groove, vn, made lengthwise in the bedE. The bar Kat its inner end is beveled Iat an angle of fortyfive degrees, and there are in the bar, longitudinally thereof and extending down through the tongue m, two slots, p p, to .receive clampscrews o o, which go through the slots and screw into the bed E. In the groove u is a bow-spring, g, for forcing the bar K upward. Furthermore, there is marked lengthwise on the adjustable bed E, parallel with the clamp-bar, a scale, s, of inches and parts of inches, and there projects from the said bed a stop, t, which, by bringing up against the rest or bar f, causes the upper face ofthe bed E to stand at a right angle to the outer face of the said har f. An

arm, L,pivoted to a bracket, u, fixed to the bed E at its outer end, supports a gage-rod, M, that slides freely through the arm, and may be sustained in position by a clamp-screw, c, screwed into the arm. This arm can be turned so as to carry the gage-rod M down upon the bed E and upon either side of the clamp-bar K. The rod M serves as a gage or stop` for a rule to abut against in order to determine where it is to be severed, it preparatory to being cut being inserted between the rest and the knife and up to theinner end of the gage, and being subsequently held firmly in place on the bed E by means of the clamp-bar K and its screws, the rule extending under the said clan1p-bar. The movable knife has two straight cutting-edges, y y, making an obtuse angle with each other, such being to admit of a rule being cut with a drawing or shear stroke of the knife from whichever edge of the clamp-bar K the rule may extend.

Through the frame A there is a hole, w, for

IOO

reception ofthe gage-rodM, there beingscrewed into the frame a clamp-screw, -to clamp the rod in the hole. The rod is shown by dotted lines as arranged in the hole, instead of in the arm L, in order for the part y of the rod to serve as a stop for a rule to bring up against, preparatory to being cut, in case of the rule being introduced between the knife and rest irom the front side of the frame.

With the machine above described a rule may he cut either square 7 or mitering or at any desirable angle to one of itsparallel sides, and 1t may be divided into pieces of equal lengths, as occasion may require, it, preparatory to each cutting of it, being properly introduced between therest and knife, and the latter being subsequently forced downward so as to sever l the rule supported by the rest.

- ism for elevating and depressing it, (the said knife,) as explained, relatively to the said rest,

the adjustablebed E, pivoted to the said standard or frame A, and provided with the movable clamp-bar K and its screws, and with means of supporting such bed in a horizontal position as well as in any inclined position Within the range of itsmovement, all being substantially as set forth.

2. The combination of the index pointer projecting from the standard with thedescribed y ROBERT STOWE ROB SON.

Vitnesses:

R. H. EDDY, E. B. PRATT.

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