US920036A - Relay. - Google Patents

Description

P. L. DODGSON.

RELAY.

APPLICATION EILEE NOV. s, 1906. RENEWED JUNE 6, 1906.

920,036, Patented Apr. 27, 1909.

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P. L. DODGSON.

RELAY. APPLICATION FILED NOV. 3, 190a. RENEWED JUNE 6, 190B.

Patented Apr; 27, 1909.

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Specification of Letters Patent.

Patented April 2'7, 1908.

Original acvlication filed may 17, 1906, Serial No. 317,269. Divided and this application filed November 3, 1906,

Serial No. M1358.

a New York, have invented a new and useful lug-1s a speciiiczrtion.

My invention relates to. relays and more particularly to relays ol the polarized type employed in railway switching andsig'lniling Tmprovement in Relays, of which the followsystems.

The object of my invention is to provide a polariaed relay in which certainty of action is insured and iii Which'the h s of magnetic energy is reduced to the minimum.

Afurther object is to embody ina polarized relay the improvements of my latent No. $96,809, Aug. 25, 1908, of-which this is .a divisional application.

Referring to the drawings herewith, Figure 1 is a side elevation, partly in section on the axis of one of the magnet coils. Fig. 2 a horizontal section on the line i -.7; of Fig. 1. Fig. 3 is a side elevation of one of my permanent magnets, my swinging contact arm and contacts. Fig. 4- is an end elevation of the contact arm and contacts.

I will first describe the relay proper. in the drawings 1 have shown a two-arm, l'ourcoiitact relay. Thehousing of the apparatus is madenp of a base-plate 1, a carry plate 2, and a surrounding glass or other non-conducting body 3. The .eripheries of the body 3 are seated Within l angcs on the plates 1 and 2;, gether by screws 4. proof cement the housing ailords a damppro'of chamber for the working parts of the relay. The magnet cores are made up of cylindrical bodies 5 and rectangular shaped and enlarged ends 6 and 7. The bodies 5 ol' the cores fit snugly through holes in the. carrying-plate 2 and are secured to it by screws 6, 7 (see Fig. 2) passing through said plate and threaded into the rectangular ends 6 and 7 on two diametrically op osite corners. The windings 8'and the siells 9 are slipped over the cores 5 and held down firmly by the binding-post 10, which, in turn, is

held down by' nuts 1-1 threaded to the upper ends of the cores 5.

binding-posts for the circuit of the magnets.

12 is an armature common to both mag The yoke 10 carries the Renewed June 5, 1908. Serial No. 37,199.

and the parts are. held to- The plate 2, and faces the rectangular ends 6 and 7 of the cores. Mounted with but insulated from the armature 12 arefcontact arms 14, which. alien the-magnets are denergized make electrical connection with the back contacts 15 v\ hich are electrically connected with the'hin ii. the energized state of the magnets, make electrical connection with the contacts 16, which are electrically connected with the binding -posts '18 and The inleading -\ures connect with the binding-posts l7 and 20, which are connected with their respective contact ai is llhy llcrihle conductors 18.

Having thus indicated the parts and general construction of the relay proper, I will now describe the features of my invention. Pivotallymounted between the poles 6 and 7 is a non-magnetic arn 27. The pivots on this arm are carried by a lug on the plate 2, shown in hrohen outline in Fig. 1 and by a plate the plate 2. The arm 27 has thus a limited motion in. rotation in a horizontal plane. Rigidly secured to this plate 27 are per-. manent magnets :38 and 29. These magnets ztltll0]SC*SllUtESlltlPQd, or, perhaps more prop only rectangular in form, the inner rectangular area beipgslightly in excess of the rrossscction oi the pole pieces 6 and 7 to permit of sullicient swing of the arm 27 ding-posts] 9 and 22 and which,

36 which is secured to lugs on At one end of the arm is secured an inv piece 31 32 and 34 insulated from sulating piece 31 and secured to this are contact brushes 23 and 24 are contacts connecting with binding posts on the carrying -plate 2. so contacts 23 and 24 and the contact brushes 32 and 34 are so positioned that when the arm 27 is swung in one direction the brush 32 will make electrical connection with the contact 23. and the brush 34 will make electrical connection with the contact 24; and when the arm 27 is swung in other direction the brush 32 Will make electrical connection with the contact 24 and the brush 34 Withthe contact 23. From a binding post 25 a flexible conductor 33 connects with the contact brush 32, and from a bind ing-post 26 a flexible conductor 35 connects- With the contact brush 34.

The most important feature of my invention 1s the means whereby I ellect the movement ofdghe arm 27. The permanent magnets are so arranged as regards their polarity tion.

that like poles of both magnets are oii't e" same side of the polepieces of the electro righthand leg of the permanent ma net 28" would therefore be attracted toward t e pole piece 6, and likewise the left hand leg of per- -manent magnet 29 would be attracted toward ole piece 7, and further,the left hand leg of permanent magnet 28 would be' repellet! from pole-piecefi' and the right; hand eg of magnet 29 would be repelled from pole piece 7. The whole tendency therefore of.

the magnetic effect is to rotate the two permanent magnets in a counter clockwise direc- If now the current in the electro-magnet is reversed so that pole piece 6 becomes a positive polarity and pole piece 7 negative polarity, the direction of all four poles of the permanent magnets would be reversed and the tendency would be to rotate in the clockwise direction. Of course every energi'zation of the magnets, whichever direction of flow may occur in the coils '8, will lift the armature 12 and establish the circuit of the front contacts through the binding posts 18 and 21. By this method of construction and arrangement of the permanent magnets about the magnet poles, leakage and loss of mag-- netic energy-An previous construction a serious difiiculty-is practically eliminated. Moreover, I hereby attain in a polarized relay the same advantages of construction which exist in my relay, above referred to, namely: symmetrical arrangement, in-

creasedmagrietic efficiency, and su porting all of the working parts on a single p ate and housing the same and at the same time permitting of removal and replacement of the magnet coils without disturbance of'the adjustment of the working parts.

Having thus described my invention, what I claim is: v

1; In combination with the electro-magnet, armature, contact arms and contacts of a relay, a neutral armature, two permanent magnets carried by said neutral armature,

pivots carrying said neutral armature and permanent magnets so that said permanent I magnets swing in a plane at right angles to the cores of the electro-magnet, said permaolarity so arnent magnets having their ranged that the magnetic e 'ect of all four poles tends to rotate them in the same direction.

2. In a relay, in combination with the electro-magnet, pole pieces, an armature governed by said magnet, a pole changing arm and contacts and ermanent magnets surrounding the three si es of said pole pieces and arranged'as to their polarity so that the magnetic effect 'of all four poles tends to rotatc themin the same direction.

3. In a relay in combination with the electro-magnet, poleieces, armature and contacts for establis 'ng a circuit or circuits,

means for determining the direction of current flow in a circuit, comprising a polechanger, an arm governing the same, permanent magnets secured to said arm and in the magnetic field of said pole pieces on three sides of said pole pieces and so arranged as to their fixed polarity, that when ever current is sent through the magnet of said relay said armature is moved to establish a circuit or circuits and whereby said pole-changer is moved to establish direction of flow in a circuit in accordance with the direction of flow of current in said electro-magnet. v

4. In a relay, in combination with the ,electro-magnet, armature and contacts for establishing a circuit,-means for changing the direction of current flow in a circuit in accordance with the direction of current flow in the relay coils comprising contacts, a pivoted arm and permanent magnets secured to said arm, said permanent magnets lying in the magnetic field of the poles of the relay magnet and upon three sides of the same and arranged so that the magnetic ifect of all four poles tendsto rotate them in the same direction.

In testimony whereof, I have-hereunto set my hand in the presence-0f two witnesses.

FRANK DODGSON. 1 Witnesses A. F. Dinrnroir, O. 'L. Yneen.

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