US1288738A - Electromagnetically-controlled switch. - Google Patents

Description

N. H. SUREN. ELECIROMAGNETICALLY CONTROLLED SWITCH.

APPLICATlDN FILED MAY 8! 1916- 1,288.'738. Patented Dec.. 24, 1918.

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NATHAN H. SUB/EN, OF NEEDHM, MASSACHUSETTS, ASSIGNOR TO THE GAMEWELL FIRE-ALARM TELEGRAPH- COMPANY, 0F NEWTGN' UPPER FALLS, MASSACHUSETTS,

A CORPORATION OF NEX/V I YORK.

ELECTRDMAGNETICiLLY-CONIROLLED SWITCH.

Specification of Letters Patent.

Patented Deo. 24, 1918.

Serial No. 86,004.

To MZ whom it may concern.'

Be it known that l, NATHAN l-l. Sonori, a citizen of the United States, residing at Needham, in the county of Norfolk and State ci Massachusetts, have invented an improvement in Eier-tremagietically Corn trolled Switches, of which the following is a sjieciicationa This invention relates 'to electromagnetically operated switches, and .has for its object the construction of an improved torni of switch having a strong actuating spring for operating it, which is adapted to he released easily, so that it may be responsive to a very light current, yet is not liable to be released by a ar. rilhis invention is a division of my application filed July 22, 1910, Serial lilo. 573,291, which has issued as l'atent No,V LQGS-, dated lec. l2, 1916.

Figure lis a front elevation oi an electric v switch embodying this invention.

Fig. 2 is averti-cal section of the same.

Fig. 3 is a fragmentary detail.

The switch embodying this invention is adapted to ce locked in closed position and to he released by an electromagnet which is controlled by a very light current. lit is here shown as a double-pole snf'iteh, and g, y represent its movable or pivoted blades, which are adapted to engage stationary members, said blades being rigidly connected together.

The movable switch-member has attached to it a strong spring 20, by which it is opened. Said switch-niemher will he closed by hand aainst the stress of its actuating spring, and, when elosed, will he engaged oy a latch which is subsequently released hy the electro-magnet g2. As here shown, g5 repro sents the latch which is pivoted at g, and controlled hy a spring 77. lt has a projection g8 adapted 'to oe moved into position to engage the end of an extension g1 on the armature-lever gm, of the eleotromagnet g2, when the armatore is in its retracted posi tion, as shown in Fig. lt has a projection g" which is adapted to he struck hy a projection g3 on the switchnnemher for the purpose of moving the latch into` engaging position with the armature. lthas jection g4, which, when'tne raten is into such engagingposition, enters moved a hole a pro-I` in the projection g3, andl thereby locks the switch-member in closed posltlon.

When the armature is attracted tl1earma' ture-lever will be moved to release the llatch,

see Fig. 3, and as soon as said latch 1s re-1 leased, it is inoved by its controlling-spring g?, and its projection ,g4 disenoages the projection g3, permitting the switch to be opened by its actuating-spring 20. Thus, the switch vis manually closed and electro-magnetically released i The several parts are so proportioned 'that there 1s a great reduction in.

leverage, which admits of the employment of a powerful actuatingspring, adapted to oe released by a light current, yet thelatch isnot such as will be released by ay jar.

l. An electro-magnetically operated switch, comprising a pivoted switch-inem-v ber, having a locking projection secured thereto and extended rearwardly therefrom having a hole intermediate 'its length, an aotuatingspring connected 'with said switchmemoer, a pivoted spring-controlled latch having a projection arranged to enter the holo in said locking projection, and lock the switchenexnloer in closed position, and having a projection arranged in the path of movement of the locking projection to vhe engaged hy the end thereof, for turning the latch on its pivot, andcause its aforesaid projection to enter the hole inthe locking projection, and having another projection extended downwardly into the path of movement of the armature-lever of an electromagnet, to ne engaged thereby.

switch, comprising a pivotedswitch mernber, a locking member secured thereto and extended rearwardly therefrom having 'an opening therein intermediate its length, and a latch engaging extremity, and a pivoted, spring pressed latch havingV a projection thereon arranged to be engaged by the extremity of said locking engagement with said member, and a locking projection a1"- ranged to enter the opening in said locking member when said latch is rotated lo said member and 'look said switch mem er in closedI position. Y

3. An electro-magnetically operated switch, comprising a pivoted switch mem- 291.l lDivided and this application led May 8,1916.'

2. An electro magnetically; o p e r a t e d arranged in the path of movement of the ber, a locking member Secured theretohaving an opening therein intermediate its length and a latch engaging extremity, a pivoted latch having` a projection arranged to be engaged by theextremity of :said locking member to rotate said latch into locking engagement with said member when said switch member is moved toward closed position, and a locking projection arranged tov be moved by the rotation of'said latch into the/opening in said locking member to lock' said switch member in closed position, and an abutment projection of said latch to limit the amount of rotated movement of said latch and to 15 restrict, through the rejection of said latch, the movement of sai switch member toward closed position.

In testimonyrwhereof I have signed my name to this specification in the presence of 2o two subscribing witnesses.

i NATHAN H. SURE N.

Witnesses:

B. J. Noms, H.y B. DAVIS.

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