US41088A - oakes - Google Patents

Description

UNITED STATES PATENT OFFICE.

Y. H. OAKES, OF NEW YORK, N. Y.

` DIE-SlNKING PRESS FOR OBTINING RELIEF-PLATES FOR SURFACE-PRINTING.

Specification forming part of Letters Patent No. 41,088, dated January 5, 1864.

'had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a front view of the press; Fig. 2, a side view; Fig. 3, atop view; Fig. 4, a transverse vertical section.

Similar letters of reference indicate corresponding parts in all the figures.

It will he observed that this machine consists of a table, A, upon which is placed the plate to be stamped. B is a cross-har forming part of a slide-carriage, which sustains the pressing mechanism, and is itself supported by the tongues P and P, which tit and travel in grooves on either side of the table, the motion of the whole heilig ei'ected at will by mi ans of the stationary screw-leader L, playing into a clutch, A,in Fig. 2, on the side piece, P, which may be removed from contact with the screw leader by loosening the jam-screw N, in case it is desired to move the slide-carthe forwardprojection ot' the standard O, and

elevates or depresses the plunger E, on the lower end of which is fastened the tool or die formed into the device which it is desired to impress upon 'the plate; or the tool may he held by hand against the rest or guide-piece It, so as to receive the blow of the plunger E,

which will be the more convenient mode of operating the press when there is occasion for a frequent change of tools, punches, or dies. On the under side of the pulley is a lug or stop, H, adjustable in the circular slots (shown in Fig. 3) by means of the thumb-screw H. This stop, at a certain point in the revolution of the pulley F, strikes against the head of the setscrew I, and thus arrests the movement ofthe pulley. By elevating or depressing the setscrew I the pulley may be permitted to have several revolutions, or only a part of one revolution, as may be desired, it being obvious that the set-screw is inoperative until the pulley is screwed and lowered down so that the stop H in revolving strikes against the head of the set-screw I. By this means a series of impressions upon the plate may be made of precisely uniform depth, and, moreover, the depth is susceptible ot' the most nice and accurate regulation by means of altering the height of the setscrew, as described, so that the pulley has a greater or lesser number of turns, and the plunger a corresponding extent of depression. 'Ihe pulley has an intermittent reciprocatory motion, which may be communicated to it either by the hand or by a belt,

and it is so constructed that after having been i screwed down to make an impression it may be brought back by means of a weight attached to a cord which iswound around the pulley.

.Having thus described my invention, what I cla-im as new, and desire to secure by Let ters Patent, is-

The screw-lever or pulley F, or its equivalent, for the purpose of depressing the punch', tool, or die, in combination with the adjustable stop Hand set-screw I, whereby aunit'orm depth of impression is secured.

` W. H. OAKES.

Witnesses:

CHAs. MORRILL, PETER (looKE.

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