US2384948A - Telephone switch or telephone contact - Google Patents

Description

SePt- 13, 1945s G. H. McLouGHLlN 2,384,948

TELEPHONE SWITCH OR TELEPHONE CONTACT Filed Dec. '9, 1940 l l Ir.

J/yg

1 zz 2525 2a z la;

Invenior Patented Sept. 18, 1945 TELEPHONE SWITCH R TELEPHONE CONTACT George H. McLoughlin, Scranton, Pa., assignor to Automatic Electric Laboratories, Inc., Chicago, Ill., a corporation of Delaware Application December 9, 1940, Serial No. 369,157

1 Claim.

This invention relates to electric switches, contacts or buttons used on telephone sets conslsting of a sound receiver and transmitter and suitable stands, bases, hangers, holders or cradles for holding same; and the primary object thereof is to provide a magnetically operated telephone switch for the purpose of breaking and closing an electrical telephone circuit and for the purpose of providing an entirely enclosed switch so that said switch cannot be accidentally 0r deliberately operated while the telephone is in use and to prevent dust and other material from reaching the switch and interfering with its operation and to prevent sparks created 1by the switch from igniting any gases present in the surrounding atmosphere; and to this end my invention consists of movable permanent magnets which normally attract or repel magnet arms (attraction or repulsion depending upon the arrangement of magnetic poles) thereby breaking the circuit, and Iwhen the movable magnets are removed they no longer inuence the magnet arms and these arms are retracted by springs to make electrical contact and thus complete the telephone circuit.

It also consists of magnets arranged in the vhandpiece in such a Way that two of their similar magnetic poles are farthest from each other, thus a similar pole will always be in the proper place above the arm regardless of which way the handpiece is placed in the cradle.

Also, it further consists of novel combinations, arrangements and relation of parts, which are revealed in the description.

Two similar switch units are shown in each -phone of each drawing in order to illustrate a in the handpiece.

Fig. 2. The telephone base containing the contact parts of the switches.

Fig. 3. A part of the switch (the magnet arm) showing the method of attaching the magnet or magnetic metal piece to the axle and stand, and

been made.

(Cl. 179-159) l ,l

also the method of insulating the contact spring from the arm.

The numerals designate the parts which are described in the following paragraph:

In drawing number one-numeral I designates the permanent magnets set in recesses in the4 base casing II by means of nuts 8. Numeral 3 1 designates a pair of springs which are held in place by 'bolts and nuts 'I and which press upwardly on arms 2. ignate electric wires, which provide an electric circuit through upwardly making contact point :bolts I I and contact springs 4 which are attached to arms 2 by means of bolts 28 and insulated from arms 2 by means of insulating washers 2I and 26. Numeral 25 designates the north poles of the magnet arms 2; thus numerals 24 and 25 designate like magnetic poles in combinations of magnets which are like in any pole relations or arrangements. Numerals 2| and 2U designate hollow spaces of base. Numeral I9 designatesl the phone cradle which is attached to the removable top I8, which is attached to the base casing I1 by means of bolts I4. Numeral I3 designates the telephone cable containing wires leading to the switch.

The operation is as follows: When the handpiece 22 is in the cradle I9, the magnets I and magnet arms 2 repulse each other and thus the pivotcd magnet arms 2 are forced or repulsed by magnetic repulsion of like magnetic poles. thereby withdrawing the contact springs 4 from engagement with the extended contact point :bolts III and thus breaking the circuit, this being the normal disposition of the parts as long as the handpiece 22 remains in the cradle I9. When the handpiece 22 is removed from the cradle I9, the mutual magnetic influence no longer exists, leaving the arms 2 free to be raised by the springs 3 and thus causing the contact springs 4 to engage the extended contact point bolts II .and

close the circuit, thus allowing the passage of an electric current through the telephone circuit.

I am aware that prior to my invention some types of magnetically operated switches have I, therefore, do not claim the m88- netically operated switch in its entirety, but only Numerals 9, III and I2 desthose types and applications stated in the following.

I claim:

A telephone switch system comprising two or d more sets of magnets arranged to act in unity and consisting of a plurality of magnets movably mounted within a desk setl in combination with a plurality of magnets immovably mounted on a hand set. said magnets having their like poles so arranged that one set of like poles are adjacent each other while the other set oi.' like poles are remote from each other and also being so ar-

Images