US1173240A - Electromagnet. - Google Patents

Description

A. A. ZIEGLER.

ELECTROMAGNET.

APPLICATION FILED JAN. 20, m3.

HQEW,

Patented Feb. 29, 1916.

ALFRED A. ZIEGLER, OF BOSTON, MASSACHUSETTS.

ELECTROMAGNET.

Application filed January 20, 1913.

To all whom it may concern:

Be it known that I, ALFRED A. Zrueucu. a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented an 1111- provement in Electromagnets, of which the following is a specification.

This invention relates to eleetro-magnets, and is intended as an improvement upon the electro-magnet shown in my application #53l,932, and #741,650. In my application #534,932 the core of the magnet has a pole-piece at its end and is stationarily supported in upright position on a carrying plate, and the coil is removably placed on said core, and in said application the core is stationarily supported by screws extended through the pole-piece, and into the carrying-plate.

In the construction of relays for-railway signaling purposes electro-magnets having their cores formed or provided with enlarged pole-pieces and stationarily supported on the carrying-plate are of considerable importance, and my present invention has for its object certain improvements in the means for securing the core to the carrying-plate by which "the efficiency of the electro-magnet is substantially increased and liability of tampering with the relay reduced.

In accordance with this invention the core is extended through a hole in the carryingplate, and its pole-piece rests against the under side of said plate, and abutments are arranged on the'bottom of the plate which are spaced apart sufliciently to receive the pole-piece between them, and said abutments are made high enough to enable screws to be passed through threaded holes formed in them, the ends of which screws enter recesses formed in the core and bear against seats at the bottoms of said recesses, thus securely fastening the core to the carryingplate without passing screws through the pole-piece, and thereby utilizing portions of its surface of considerable area for the heads of the screws. Furthermore, said screws are concealed by the housing of which the carrying-plate forms the top wall, which is a decided advantage over passing the screws down through the carrying-plate and into the pole-piece and thereby exposing their heads, whereby they are accessible to those inclined to tamper with the relay. The

Specification of Letters Patent.

Patented Feb. 29, 1916.

Serial No. 742,989.

carrying-plate which forms the top wall of the housing may be composed of insulating material, of a substantial thickness, having a metallic plate secured to its under' side upon which the abutments are formed to re ceive between them the pole-piece and to serve as supports for the attaching-screws. yet with the exception of the abutments said plate is substantially the same as shown in my application #741550; or said earrving-plate may be composed of metal, of a substantial thickness and having formed upon its under side the abutments, which with the exception of the abutments is substantially as shown in my application #534,932, in the one instance the carryingplate being composed of two pieces and in the other instance of a single piece.

Figure 1 is a side elevation of an electromagnet embodying this invention, in connection with the component parts of a relay. Fig. 2 is a detail partly in section of the magnet-core and pole-piece and attaching-means therefor. Fig. 3 is a vertical section of the lower end portion of the core and pole-piece and carrying-plate. Fig. 4: is a bottom plan view of a portion of the carrying-plate and pole-pieces. Fig. 5 is a bottom plan view of a modified form of carrying plate. 7

The carrying-plate 20, see Fig. 1, of insulating material, forms the top wall of a housing. and has secured to its under side a metallic plate 145, which forms a support for the armature and other component parts of a relay. all as shown in my said application #741,650. except, as here shown, the metallic plate 145 has formed on its under side a pair of abutments 50. 50. arranged with a space between, them to receive the enlarged pole-piece 146. on the core 100. Said abutments 50, 50, however. are not as high as ,the thickness of the pole-piece. yet are sutlicientlv high to provide suitable supports -"for the attaching-screws. 'as will be described. The core is passed through ahole in the plate 145. and also through a hole in the plate 20 of insulating material, and the pole-piece occupies a position against the under side of the plate 145 between the two abutments 50. 50. Screws 60, 60. extend in diagonal directions through threaded holes in said abutments. and the ends of said screws enter recesses formed in the sides of the core 100, and bear against 110 In Fig. 5 another form of carrying-- plate is represented similar to that shown in my application #534,932, which is made 'of a substantial thickness and usually of metal, but having formed on its under side abutments 65, 65, between which the enlarged pole-piece 146 is arranged, said abutments being arranged at opposite sides of the hole for the core.

I claim 1. In an electro-magnet, a magnet-core having an enlarged pole-piece, and having seats formed in its sides above said; polepiece, a carrying-plate forming the top wall of a housing, having a holethrough it for said core and having ribs on its underside arranged adiacent said hole and spaced apart to receive said pole-piece between them, said ribs being of no greater height than the thickness of the pole-piece, and attachingscrews for stationarily holding said core, which extend diagonally upward throu h threaded holes in said ribs and engage tlle seats on the sides of the as described.

2. In an electro-magnet, a carrying-plate forming the top wall of a housing comprising an upper and an under plate secured together, both of said plates having alined holes through them, the upper plate having recesses in its underside adjacent the holes therethrough, and the under plate having ribs on its underside arranged adjacent the holes therethrough, which ribs are spaced apart, magnet-cores extended through said holes having enlarged pole-pieces arranged between said ribs and in engagement therewith and with the under plate, and having seats in its sides above said pole-pieces,

core, substantially which seats are disposed in the recesses in the upper plate, and attaching screws for stationarily securing the magnet-cores to the under plate which extends diagonally upward through threaded holes in said ribs and engage the seats on the cores, substan tially as described. 1

Intestimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

ALFRED A. ZIEGLER. Witnesses:

B. J. Novas, H. B. DAVIS.

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