US449759A - Warren b - Google Patents

Description

(No Model.)

W. B. MARTINDALE; TIME STAMP AOTUATED BY ELEGTRO MAGNETS.

No. 449,759. Patented Apr. 7,1891.

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UNITED STATES PATENT OFFICE.

WARREN B. MARTINDALE, OF KENOSHA, IVISCONSIN.

TIME-STAMP ACTUATED BY ELECTRO-MAGNETS.

SPECIFICATION forming part of Letters Patent No 449,759, dated April '7, 1891.

Application filed December 15, 1890- Serial No. 374.695. (N0 model.) Patented in England February 26, 1889, No. 3,394; in France February 26, 1889, No. 196,316, and in Germany November '7, 1889, No. 50,454.

To aZZ whom it may concern:

Be it known that I, WARREN B. MARTIN- DALE, of Kenosha, in the county of Kenosha and State of Wisconsin, have invented certain new and useful Improvements in Time Stamps Actuated by Electro-Magnets, (the same being embraced in the British Letters Patent issued to me and hearing date the 26th day of February, 1889, No. 3,394; in the French patent, No. 106,316, bearing date February 26, 1889, and in the German patent, No. 50,454, granted November 7, 1889;) and I do hereby declare that the following isa full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

My invention has for its object to provide a simple effective electric date and time stamp having all its operative mechanism embraced in its head or movable part independently o'l' anyfixed and rigid support therefor, whereby the stamp is not only rendered more compact, but will admit of being carried freely bodily to and fro over the papers to be imprinted.

It consists in the combination, with amovable head, substantially as hereinafter de scribed and claimed, of suitable indicating mechanism and an electro-magnet for actuating the same, both carried with the head to partake of its movements.

In the accompanying drawings, Figure l is a vertical section of my improved electro-magnetic hand time-stam p in a plane transversely to the axis of the type-wheels, (see line 00 as of Fig. 2;) Fig. 2, a horizontal section of the same in line 1 y of Fig. 1, affording'a top view of its operative mechanism, and Fig. 3 asectional elevation showing my invention as applied to a stamp having a swinging arm.

Similar letters indicate like parts in all of the figures.

A represents the casing or movable head of a hand-stamp, adapted to be carried freely and independently over the surface of the books or paper to be stamped.

B is an electro-magnet fitted in the rear portion of the casing A, preferably in an upright position, as shown in Fig. 1, and O is the armature for said magnet, mounted to swing over its poles upon the upper end of a lever I), Fig. 1, Whose lower end is pivoted at e to the base of the magnet. A spring M, attached to the upper end of the lever D, operates to retract the armature, said movement being limited by a stop N. ,1

The magnet B is connected by suitable conducting-wires F F with a battery F and an intermediate clock G, which operates in the customary manner to make and break the electric circuit at regular intervals, thereby actuating or energizing the magnet intermittently in synchronism with the movements of the clock.

The indicating mechanism for the stamp is mounted within the casing directly in front of the base of the magnet, in close proximity thereto. Said indicating mechanism consists, as is usual, of aseries of date and time wheels L L, revolving upon an axis at right angles to the armature-lever D, and which are adapted to be actuated by means of reciprocating pawls II II, carried by a cross-bar I, attached to the armature-lever D. These wheels L L are mounted in position to be brought to line of print in the usual manner at the bottom of the casing and in connection, if so desired, with fixed type or characters K, attached to the bottom of the casing, as shown in Fig. 1.

The details of the construction, arrangement, and operation of the date and time wheels form no part of my present invention, and may be of any approved description.

The indicating mechanism shown in the drawings is in its general construction and mode of operation substantially the same as that described in the Letters Patent of the United States granted to Ernst R. Malmborg on the 14th day of October, 1890, No. 438,166.

The transverse bar I, to which the pawls H are pivoted, is attached to the armature-lever D intermediate its pivot and its armature, and since the lever extends in a direction parallel with the line of movement followed by the casing or head when an impression is to be made with the stamp, the danger of an accidental movement of the lever and pawls, which with the customary forms of stamps is liable to occur by reason of the jar of the blow in producing an impression, is wholly avoided.

The intermittent action of the magnet B, produced by the clock actuating the lever D and the pawls carried thereby, will operate the indicating mechanism and automatically maintain its proper adjustment to indicate the exact time of day as well as the day and the month.

The printing-wheels L may be inked as required by means of an independent inkingpad, as is customary in the use of simple hand-stamps or by means of an inking-ribbon carried over the same, as shown at r in Fig.

3, or otherwise by means of any of the automatic appliances for the purpose well known to the art.

Instead of mounting theactuating-magnet B within the movable head or casing in a vera pivoted or swinging arm, placing the magtical position, as shown in Fig. 1, I contemplate, as a modification of my device in cases where the movable head is to be carried upon net in a horizontal position, as shown in Fig. 3, in which A represents the head or casing carried upon a swinging arm J, whereby the stamp is made to drop upon a platen P when depressed.

The magnet B is fitted in a, horizontal position in the portion of the arm next to the head, so as to be carried with the head and partake of its movement, and its armature O swings to and from it upon the lever D, pivoted in front of it in the lower portion of the casing.

The support of the magnet in connection with the movable head and the operation of the lever and the pawls which are pivoted thereto to actuate the indicating mechanism are substantially similar in all respects to that hereinbefore described.

I claim as my invention- 1. The combination, with a movable head carrying printing-wheels adapted to be applied by the movement of the head to the surface to be imprinted, of an electro-magnet carried with said head to partake of its movements, an armature for said magnet, and a device for transmitting the movement of the armature to the printing-wheels, substantially in the manner and for the purpose herein set forth. 1

2. The combination, in a time-stamp, with its printing-wheels, of an electro-magnet cararmature for the same adapted to swing transversely over its upper end, a lever carryin g said armature and pivoted at the lower end of the magnet, and a pawl actuating the indicating mechanism and pivoted to said lever intermediate its pivot and the armature, substantially in themanner and for the purpose hcrein set forth.

In testimony whereof I have signed my name to this specification in the presence of two'subscribingwitnesses.

WARREN B. MARTINDALE.

Witnesses:

A. N. J ESBERA, E. M. WATSON.

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