US18947A - Jmprovement in hand-stamps - Google Patents

Description

UNITED STATES PATENT OFFICE.

E. E. BARRETT, OF SALEM, MASSACHUSETTS.

iMPRovEMENT 1N HAND-STAM Ps.

Specication forming part of Letters Patent No. 18,947, dated December 29, 1857i a press embracing my improvement; and Fig.

2, aside elevation of the same with one side of the standard removed, a portion of the frame for this purpose where it is cut through being shown in section. Fig. 3 represents a longitudinal section of the ink fountain and` spreader.

My improvement consists in a peculiar arrangement and combination of devices, by means of which the stamp is inked and theimpression made by a single blow of the hand without the necessity of spreading the ink upon the surface of the roll, which has a tendency not only to daub it up, making the impression heavy on one part and thin on another, but requires to be constantly replenished, requiring unremitting attention on the part of the operator, which cannot always be conveniently given, hence causing it to make very imperfect impressions, defects which have prevented the more general introduc tion of all handstamp presses heretofore made.

To enable others skilled in the art to make, construct, and use my invention, I will now proceed to describe its parts in detail.

In the accompanying drawings the frame of the press is represented as consisting of a bed-plate A, upon which are erected curved standards B and B', having a hollow cylinder C, cast on their front end, through which the shaft D of the stamp-box E passes. On the end of this rod or shaft is cut a male screw, which takes into a female screw cut in a shank or collar E, secured on the upper side of the type-box. Immediately beneath the lower end of this screw is passed a pin a, under which the forked end of a lever G bears, by means of which the stamp is raised to the position shown in Fig. l by the tractive power of a spiral spring II, one end of which is secured to the other end of the lever G and the other to the bed-plate between the standards B and B. This lever has its fulcrum at b on the upper edge of the plate I, that connects the standards to each other. The upper edge of this plate for this purpose is beveled to enable the lever to turn with theleast possible difliculty. To the upper side, near the bifurcated end of this lever G, is secured a connecting-rod J by means of a hinged joint, whose other end is attached in a similar manner to a standard or lever K, erected on the frame L of the inking-roll M. This frame is pivoted to the standards B and B' at c and forks out at one end into two arms d, between which the inkin g-roll M is mounted in suitable bearings ein such manneras to be capable of turning freely around its axis. To the other end f of this frame is attached one end of a spiral spring N, whose other end is secured to a bolt g, made fast tothe standards. The typeboX E is provided with blank dies for holding the type in place, and which may be adjusted as required by means of a thumb-screw h, which is so arranged as to compress the whole together. Thetype-boxhavingbeen depressed by a single blow of the hand or finger, as shown in red lines at Fig. 2, and the pressure removed, it is instantly forced back to its origi- 'nal position by the traction of the spring H on the end of the lever G. As the type-box rises, the spring N, acting on the end of the inking-roll frame L, forces the roll over the type, thus inking it. In depressing the typebox to make an impression the same opera tion is repeated out in a backward direction, as the roll by the pressure of the box upon it causes it to traverse over the face of the type as it forces the frame of the roll downward to the position shown in red lines, Fig. 2, this being further assisted by the action of the connecting-rod J, which, as the lever G that raises the type-box is depressed, causes the roll-frame L to turn on its axis c, thus remov ing in a great measure any injurious effect the pressure of the type-box upon the roll might have and leaving only sufficient pressure upon it to insure the perfect inking of the type- The inking-roll M consists of a hollow per forated cylinder, into which the ink (of a proper consistency) is placed and afterward secured by means of a cap-piece z', which screws into the end of the cylinder. On either end of this cylinder are secured journals, which turn in bearings e, formed in the end of the arms d of its frame. Round the outer periphery of this roll is secured in any suitable manner a piece of felt cloth or other analogous substance of a soft and spongy nature, which absorbs the ink as it gradually oozes through the perforations in the cylinder, thus forming a fountain-roll, by means of which a large number of impressions can be made without the necessity of smearing the surface of the cloth with the ink after a very few impressions have been made.

The roller inpassing from under the typeboX is brought into contact with a diifusingplate O, which spreads the ink evenly over its surface, and which for this purpose is made of a breadth equal to the distance between the two caps of the roll. Instead of the roll being made hollow, this plate may be made double in such manner as to form an ink-fountain, in the bottom of which holes may be cut, through which the ink may ooze to coat the roll; but as it would still-ooze -through when not in use and be wasted, an

adjusted cover m, Fig. 3, must be used, to the upper side of which a pin n is secured, which passes through a slot o, formed in the upper plate, by means of which the ink can be shut off or let in, as required, by simply sliding the plate over or back from the holes; but as the plate may have a tendency to turn on the pin n as an axis, and thus not effectually cut of the supply of ink, guideways p may be formed on either side, which will prevent such an occurrence. i

If thought advisable, both the inking-roll M and spreader 0 may be made fountains;

but, as a general rule, either of itself will be found all sufficient.

In securing the spreader to the standards B and B it is done in such manner that it can be adjusted either to bear tightly or loosely on the roll, as may be deemed most advisable, itfor this purpose having a plate j on its rear end provided with slots lo, through which screws 1 pass, by means of which it is secured to the frame of the machine. On the upper side of this fountain is provided an orifice, through which the ink is supplied to it, there being a cap-piece s provided for it, and which 'Y ts into it to prevent the escape of the ink. The roll as it passes along beneath this fountain O under a slight pressure becomes coated with the necessary quantity of ink for the inking of the type, so that by either of these plans at each blow of the hand the type is inked and an impression made, and that for a long continued time, without requiring the constant attention of the operatorto see that the roll is sutliciently charged to make a perfect impression or to smear the ink on, as in the case with all other hand-stamp presses 110W 1D USS.

I claim- So arranging and constructing the ink-fountain 'O that when combined with the inkingroller of a hand-stamp press it shall serve the double purpose of inking the roller and distributing the ink over its surface, in the mauner substantially as described.

E. E. BARRETT.

Witnesses:

P. HANNAY, W. LEsKI.

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