US128427A

US128427A - Improvement in circuit-changers

Info

Publication number: US128427A
Authority: US
Publication date: 1872-06-25
Anticipated expiration: 1889-06-25

Description

J. ROWE.

Improvement in Circuit Changers.

No.128427, Patentedlune 25.1872.

UNITED STATES PATENT OFFICE.

IMPRVEMENT IN CIRCUIT-CHANGERS.

Specification forming part of Letters Patent No. 128,427, dated June 25, 1872.

To all 'whom it may concern:

Be it known that I, J AMES RowE, of Pater` son, in the county of Passaic and State of New Jersey, have invented an Improvement in Telegraphic Apparatus, and the follown g is declared to be a correct description of the same.

Vhen the armature of an electro-magnet is allowed to come into contact with the cores ot' such electro-magnetic such a way as to thereby establish a magnetic-circuit, the armature adheres to the cores by induced magnetism, and the parts cannot easily be separated until the polarity of the current is reversed, which liberates the armature and then again attracts it. This feature of electro-magnetism has been employed by H. Van Hoevenberg in connection with a printing-telegraph.

My invention relates to a circuit-changer in which two electro-magnets are employed, and a soft-iron arma-ture vibrating between them, connected with a circuit-changing arm, the parts being arranged so that when a pulsation is sent it goes through both ma gnets-it may be in one circuit or divided-so that a part will go through each magnet and thereby reduce the resistance. rihe armature when free from magnetic influence is at rest nearest to the magnet toward which it is to be attracted iirst. lt' an electric-current is sent through the electro-magnets, the armature will be at tracted to the magnet which is nearest to it, and adhere to the soft-iron cores. If, now, the polarity ofthe electriccurrent is reversed, the armature is liberated, and the spring of the circuit-breaking arm and the momentum draw the armature away from the first magnet, and throw it nearest to the second magnet 5 hence it will be drawn by the attractive force thereof into contact with the cores, and held there until the change of polarity again causes a reverse movement, and this movement also given to the circuit-breaking arm, directs a local or other current in one direction or another, or brings into action one circuit and breaks another, these circuits being employed for any known or available use. I remark that one magnet with two armatures connected with the circuitchanging arms, in such a way that the two poles of the magnet are between the two armatures, may be used instead of two magnets and one armature, as described. I n this case the two armatures act alternately.

In the drawing, Figure l is a plan ot this circuit-changer, and Fig. 2 is an elevation ot' the same partially in section. Fig. 3 is an ele- -Vation of the modified form of armature.

The magnets a and b are in onev circuit, of which c and d are the wires or connections. The cores, or the lateral extensions j and g ot' the cores are at opposite sides of the armature h, and there is the required distance between f and g to allow the armature h to swing on its axis 1'., as the polarity of the current through c and d is changed. The arm 7c should have a slight spring in it, or springs or weights be applied to move the armature from one of the cores as the circuit is broken, and cause' its momentum to swing it nearer to the other core, so as to be drawn thereto, as aforesaid. In this movement the armature moves the arm k from one circuit-closing point, Z, to the other circuit-closing point n, or vice versa. The wires ot' the local or branch circuits may be connected with l n in any convenient manner, and one of the metallic connections is made with the arm 7c, or through the axis on which it swings. The armature may be made in two parts, and these be connected to each other and to the circuit-changer, so that the electromagnet will come between the two armatures, as in Fig. 3, in which case the vibration and change of circuit will be the same as before described.

I claim as my invention- The soft-iron armature swinging from one position to the other on an electro-magnet, when the polarity ot' the electric circuit is changed, and retained alternately by induced magnetism, as set forth.

Signed by me this Sth day of February,

A. D. 1872. r

JAMES ROWE. Witnesses:

GEO. T. PINCKNEY, CEAS. H. SMITH.