US416742A - Casper l - Google Patents

Description

(No Model.)

0. L. REDPIELD.

CIRCUIT CLOSING'DE VICE FOR MATRIX MAKING MACHINES. No. 416,742. Patented Dec. 10, 1889.

- wvantoz I "UNIT D STATES PATENT OFFICE.

CASPER L. REDFIELD, or MINNEAPOLIS, MINNEsorA, ASSIGNOR, BY MEsNE ASSIGNMENTS, TO THE CHICAGO MATRIX MACHINE COMPANY.

CIRCUIT-CLOSING DEVICE FOR, MATRIX-MAKING MACHINES...

' SPECIFICATION forming part of Letters Patent No. 416,742, dated December 10,1889.

Serial No. 303,398. (No model.)

To all whom it may concern: Beit known that I, CASPER L. REDFIELD, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Circuit-Closing Devices for Matrix-Making Machines, of which the following is a specification.

My invention relates to electricallyoperated machines for making matrices by the successive impression of independent dies into a matrix-body, and specifically to the means for completing the electric circuit between the operating key or indicator and the appropriate electro-Inagnets for causing a proper matrix-carriage movement and the impingement of a plunger upon the selected die. The extent of the matrix-carriage movement required to suitably space the impressions made by dies depressed successively at a common point necessitates variable carriage movements proportioned to the size of the characters to be impressed, and requires separate magnets for the several measures of movement required of the carriage.

Letters and characters requiring the same space may have a common magnet; but heretofore a separate circuit-maker and an independent Wire for each letter and character shown on the index-plate have been the only means used for completing the circuit with the proper magnet for the selected letter or character; and, with a view to simplifying the construction of the machine and enhancing its utility, it is the object of my present invention to do away with a multiplicity of pins, springs, wires, &c., by substituting therefor a suitable series of insulated conducting-plates, each connected by a single wire with its appropriate magnet.

For the purpose of illustration I have supposed a set of nineteen characters requiring,

by reason oftheir varying sizes, a division of the matrix movements into six different measurements, each of which is controlled by a separate magnet having an electrical connnection only with the plate arranged to close the circuit for characters of the same size.

In practice any number of letters and characters may be used and any desirable number of measures of movement of the matrix arranged for.

In the accompanying drawings, illustrating my invention, Figure l is a vertical section of an index-plate and of the devices of the improvement. Fig. 2 is a plan viewof the index-plate; Figs. 3, 4, 5, 6, and 7, plan views of the conducting-plates; Fig. 8,a detail, and Fig. 9 a modification.

In the drawings the parts are considerably enlarged for the purpose of clearer illustration.

In said drawings, A designates an indexplate having indexed openings a.

B is'a pin connected to .a key or lever to serve as a circuit-closer upon its being inserted through the holes a to the plates below. I

The conducting-plates C, O, 0 (3 ,0 and G which may themselves be of very thin metal, have interposed between them thin plates D, of insulating material, andall of these are united by bolts d or otherwise to form acoinpound plate of very little thickness. Each of the conducting-plates C O, 850., has a projecting ear 0, to which a wire is attached to connect it with its appropriate magnet. C

To enable the circuit-closer B to reach any of the plates beneath the top one,it is obvious that holes, as 6, must be provided in all of the So plates'above the one with which Contact is to be made. The plates may be flat throughout, or, if desired, in order that the distance of descent of the circuit-closer B will be the same for all contacts, the portions of the lower 8 5 plates coincident with the holes eof the plates above may be suitably pressed up to form cones f, and these may be platinum-tipped for service.

Instead of showing on the index-plate the C I Fig. 1, or by having the insulating-plates D project Within the openings, as shown in Fig. 8, or by coating the sides of the pin 13 with insulating material.

In Fig. 9 one of the cones f is shown filled with some solid substance to giveit strength.

The plates 0 C, &c., are provided with lugs h, similarly arranged on each plate, so that the plates can be quickly put together in their proper order, and the ears 0, being arranged at different points, enable the electric Wires to be attached readily and with lit-. tle chance of mistake.

The operation of the devices will probably be apparent. The depression of the pin B throughone of the index-holes a to make a contact for one of the set of characters indicated. by the numeral 1 will touch the flat surface of the plateC at one of the points so marked on the plate, Fig. 3. To reach one of the set designated 2, the depression of the pin through one of the index-holes marked 2 will cause it to touch one of the cones 2 ion the second plate 0, Fig. 4, and so, to make contact with the plates (3*, C 0', and O the pin Bis inserted in any one of the holes, as 3 4, 850., corresponding With the numerals of the cones on the desired plate. Thus a circuit through the plate C will cause a minimum advance movement of the matrix, a circuit through the next plate C will causea matrix advanoeof the second measurement, and so on with each plate, each serving to cause the proper matrix movement for all of the characters requiring like matrix space.

\Vhat I claim is 1. In a matriX-making machine having a variable matrix-feed operated electrically, a perforated index-plate, a circuit-closer, and a series of metallic plates to complete the circuits for the several variant feed movements, substantially as set forth.

2. The combination, with the'perforated indeX-plate of a matrix-making machine and its circuit-closing indicator-pin, of a series of plates, each of which is arranged to serve as a circuitmaker for all the indexed characters of a selected class, substantially as set forth.

3. The combination, with a perforated index-plate of a matrix-making machine and its circuit-closing indicator-pin, of metallic plates and intervening insulating-plates having suitable openings" and contact -point s, Wherebyeaoh plate may have several electrical contact-points coincident with perforations of the index-plate, substantially as set forth.

' CASPER L. RE-DFIELD. Witnesses:

I. H. GUNQKEL, G. E. LA CLAIR.

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