US286496A - Seal-press - Google Patents

Description

(No Model.)

R. H. SMITH.

SEAL PRESS. No. 286,496. .Patented Oct. 9, 1883.

N. PETERS, mxo-umwwmr, wamwm un ilflnrrnn S'rATns PATENT rrr/cn.

n. HALE snirrH, or SPRINGFIELD, Masshcnnsnrrs.

SEAL-ences.

SPECIFICATION forming part of Letters Patent No. 286,496, dated October 9, 1883.

Application filed March l0, ISES. (No model.)

To all whom it rit-ay concern:

Be it known that l, R. HALE SMITH, of

Springfield, in the county of Hampden andy State of Massachusetts, have invented a new and useful Improvement in Seal-Presses, of

Lwfo tical movement in the line of its axis and of 3o ity, 5.

45 vertical movement therein.

the axis of the recess in which it moves in forcing the die against the counter-die, and without undue tilting of theA plunger againstits bearings, and I accomplish this by the mechanism substantially as hereinafter described,

and illustrated in the accompanying drawings, in whi cli- Figure I is a plan view of asealspress having my invention applied thereto. Fig. II is 2o' a vertical longitudinal section of the same at the axis of the plunger. Fig. III is a side view of the plunger. Fig. IV is a plan view of the same, and Fig. V is a sectional view of a modification of the invention.

In the drawings, 2 represents the base of a to a horizontal interior shoulder, 18, and a smaller hole is made at 16 through the lower part ofthe arm and below the cavity 4. I secure a small rod, 6, in the arm in the bottom of the recess 5, which rod projects upward in l 4o to the recess, as shown clearly in Fig. II.

I make the plunger 7 cylindrical, with a portion thereof near its upper 'end made smooth and fitted snugly into the upper smoothed portion of the recess 4, but so as to have a free A horizontal guide-piece, l0, is made upon the upper end of this plunger, and projects rearward, with a vertical hole, l1, made therein, through which the rod 6 extends when the parts are in 5oV place. The plunger has a horizontal shoulder,

8near its upper part, and I make this plunger of smaller diameter below this shoulder, with its lower end to have a slidingbearing in and project through the hole 16 below the recess 4, and adapted to have a die, as 20, secured to its lower end, to operate in connection with a counter-die, 21, secured to the base of the press beneath 'the die.

In putting the parts in position, I, place a spiral spring, 9, of a proper size to receive the lower'and smaller portion of the plunger within the recess 4, and insert the plunger into this spring and recess 4, with its lower end projecting through the hole I6, and with the upper end of the rod 6 inserted through the hole l1 in the horizontal guidepiece l0 of the plunger. The ordinary operating cam-lever, l2, is pivoted in place at 18, and the die 20 secured to the lower end of the plunger, and the machine is ready for use.

It will be seen that as the spring 9 bears upward against the shoulder S on the plunger, its operation is to move the plunger upward 'after each downward movement of the latter in the line of its axis, and without any tendency to tilt the plunger out of this line of movement, while the guide-rod 6, as the guide piece 10 slides thereon, operates to keep the plunger in its true vertical position, so that said plunger has a true concentric movement in its bearings.

It will also be seen that the only parts of the device which require to be smoothly iinished for bearing-surfaces are the upper and lower part-s of the plunger, the bearing 1G, the upper part of the recess 4, and the rod 6, with the hole 1I through the guide-piece l0, the other parts being allowed to remain as originally cast.

In the modification shown in Fig. V the flat spring 9 is secured to the arm at 22, and is forked at its free end, and strides the upper end of theplunger 7 and presses upward against the shoulder 8 to force the plunger upward, and the rod 6 projects upward through an opening in the iiat spring 9 and through the hole ll in the guide-piece 10 to guide the plunger in its vertical movement.

In the ordinary construction of seal-presses the actuating-spring is placed beneath and to IOC 2 ese-ree bear against the guide-piece projecting from the rear of the plunger, and the result is that the plunger While being yactuated upward by the spring is also givena tilting moveinent,' thereby causing it to move against one side of its lower bearing and against the opposite side of its upper bearing, and as there is no guiderod 6 in the ordinary construction, the guidepiece ofthe plunger moves against the sides of the cavity 10, which in this tilting movement of the plunger, as the latter and its bear.r

ings become Worn, does not guide the plunger properly. In the use of my device, however, these objections do not exist, as all the movements ofthe plunger are made in a direct line with its axis, and the result is that the letters and devices made on and in the die and counter-die are much better preserved and are not bruised and mutilated by any imperfect move- R. HALE SMITH.

VVitneSSes:

T. A. CURTis, G. V. Cuu'rrs.

Images