US177073A - Improvement in machines for stripping file-blanks - Google Patents

Description

WITNESSES- W. T. NICHOLSON.

MACHiITES FDR STRIPPING FILE-BLANKS. No; 177,073. Patented May 9,1876.

I mun I INVENTOR- N-PEYERS FN6TO LITHOGRAPHEK WASHINGTON, D U,

WILLIAM T. nrouoLson, OF PROVIDENCE, RHODE ISLAND mcnonson FILE coMPANY, on SAME PLACE.

PATENT IMPROVEMENT IN MAH|NES FOR STRIPPING FILE BhANKS.

Specification forming part of Letters Patent no. 177,073, dated May 9, i876 appliance filed December 16, 1875. I

To all whom it may coa'iceln Be it known that I, WILLIAM T. NIcHoL- soN, 0f the city and county of Providence, in the State of Rhode Island, have invented oertain new and useful Improvements in Machines for Stripping File-Blanks; and I do herewith. This part of myinvention consists, first, in the peculiar arrangement of a reversible bed for holding the file-blank; second, in the application of two laterally-reciprocating stripping-files in opposite directions to two file-blanks secured to a reversible bed third,

in the peculiar device by which the reversiblebed is connected with and disconnected from the driving mechanism, as will be more fully described hereinafter.

Figure 1 is a top view of my improved filestripping machine, parts of three other machines being shown as connected with the same driving device. Fig. 2 is a front elevation of the same, showing the means employed for reciprocating the stripper-bars. Fig. 3 is a side view of the machine.

Similar letters of reference indicate corresponding parts.

In the drawings, a is the reversible reciproeating bed, to which two file-blanks are secured, one upon its upper and the other upon its lower face, so that two file-blanks are operated upon at the same time, either by subjecting one blank to a roughing-stripper and one to a smoothing or finishing stripper, so that the file-blank is first operated upon by the one and then by the other stripping-file; or two stripper-files may be used, by each of which the operation is completed, and thus two file-blanks be stripped or draw-filed simultaneously. I) is a reversible coupling secured to the end of the bed a. This coupling engag-es over a projecting hm on the plate 0,

which, in Fig. 1, is shown asia square plate with which four machines are connected by couplings b b b b. In place of the square plate 0, as shown, a circular plate having a similar rim around its periphery may be used; and four or more machines be driven from one central shaft. The plate 0 is carried on the crank-pin secured to the crank d at such distance from the center as will produce the length of reciprocation required for the fileblanks to be stripped. e is the upper and f the lower stripping-bar, to'which the stripping-files are secured-in the usual manner. A lateral reciprocating'movement is imparted to these files through a cam or pinion, y, en gaging in the face-wheel h, secured to the shaft 6, to which the eccentrics K K are also secured. At each revolution of the main shaft the facewheel h is rotated one, two, or more teeth, thus slowly rotating the shaft 2' and the eccentrics K K. The eccentrics K K are adjustable on the shaft, so that-they may be set to greater or less eccentric motion. The hinged levers Z Z, secured at the fulcrum M M, are connected with the stripper-bars e and f, and also with the eccentrics K K. The rotary motion of the shaft 2' is thus changed into reciprocating motion and transmitted to the stripper-bars. The two eccentrics are set, as shown in Fig. 2, in opposit directions, and thus the stripper-bars are made to move and reciprocate laterally in opposite directions.- By these means no lateral strain is exerted on the bed a, as the two strippers counteract'the strain of each other. The stripper-bar f is supported by a roller secured to an arm of the hinged lever O, and is held firmly against the fileblank by a weight, g, suspended from the horizontal arm of the lever O, the pressure is increased at the outward stroke or reciprocation of the bed a by the rod 1", secured to'an eccentric rotating with the main driving-shaft, which rod 1" passes through the friction-clutch p, and thus, by frictional contact, pushes against the lever 0, and increases the pressure of the stripping-files against the fileblanks, While the same frictional contact di-' minishes the pressure at the return stroke, by

, ASSIGNOR TO pulling on the lever O in the opposite direction. This feature of the machine is the same which is described and claimed in another application for Letters Patent of even date herewith. Oonnected with the horizontal arm of I the lever O is the arm 8 projecting forward to the guide-block u, supporting a roller placed .into said guide-block u. When the lower end of the lever O is moved forward, so that the pawl t-engages with the catch a, the arm sis also pushed forward and raises the connected end of the bed a, and disengages thecoupling b from the plate 0, and the stripper-bar f, and

' the bed a are lowered. The bed therefore will What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination in a file-strippiugmachine of the reversible bed a, and the laterally-reciprocating stripping-files f and e, operzt ted substantially as and for the purpose set 2. The combination, with the reversible bed a, of the lever 0, weight g, and lever s, the

whole operating together as and for the purs pose specified.

3. The combination of the pinion g, face wheel h, and eccentrics K K, with the levers l l, for imparting lateral reciprocating motion to thestripping-files, as and forthe purpose described.

WILLIAM 'r. NICHOLSON.

Witnesses: V i I FRANK S. ARNOLD, J. G. B. WOODS.

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