US1107536A - Relay. - Google Patents

Description

F. R. MGBERTY.

RELAY.

APPLICATION FILED 113.26, 1910.

1,107,536. Patented Aug. 18, 1911 Wfua-MA Fmg/1 R. /v/Ceffy 'by y UNITED STATES PATENT OFFICE.

FRANK R. MUBERTY, 0F NEW ROCHELLE, NEW YORK, ASSIGNOR T0 WESTERN ELECTRIC COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

RELAY.

Specification of Letters Patent.

Patented Au". 18, 1914.

Application led February 26, 1910. Serial No. 546,136.

To all 'whom it may concern Be it known that I, FRANK R. MoBnn'rY, citizen of the United States, residing at New Rochelle, in the county of lVestchester and State of New York, have invented a certain new and usefulvlmprovement in Relays, of which the following is a full, clear, concise, and exact description.

This invention relates to relays and more 1)articularly to relays of the type adapted for use with telephone exchange systems.

Relays adapted for service in circuits where they are required to respond to comparatively feeble current, or to work on narrow margins of current, must be extremely accurate in adjustment, and it is desirable that such relays be permanently adjusted when assembled, and rugged enough to maintain their original adjustment despite considerable handling and use.

It is the purpose of this invention to provide a relay construction from machinemade parts which will fulfil these conditions. Heretofore, it has been found very difficult to construct edicient relays of this type with machine-made parts, for the reason that it is impossible to produce similar parts eX- actly alike, even with the greatest care. Consequently, upon the assemblingr of the various machine-made parts into a finished relay, these minor differences tend to become cumulative, and many are found to be out of adjustment and inoperative.

The invention contemplates a relay kconstruction wherein the circuit terminals which control the range ofA movement of the armature as well as its distance from the pole face shall each be fitted directly over a common uniform support carrying the helix, which becomes in effecti a datum plane.

The invention may be carried out by eX- tending the core beyond the forward end of the helix and fitting over said core the metallic plates .wherein terminate the `eircuits to be controlled, anvarinature being suitably mounted to rock between said metallic plates. As shown, the plates may have ciri'rular recesses whereby they lare fitted over a cylindrical core extension of less crosssectioiial area than the core itself, andthe Contact plates may have ears struck off at right angles and lying in different vertical planes so as to accommodate between them a contact carried by an armature mounted at the side of the core.

The various features of my invention will be more readily understood when particularlj,7 described with reference to the appended drawings, wherein- Figure l is a perspective view of a relay constructed in accordance with my invention;Fig. 2 is a side elevation thereof; Fig. 'is a side elevation of the relay reversibly as to that of Fig. 2; Fig. Ll is an end elevation; Fig. 5 is a plan view; Fig. (i is a view of the armature removed from its support; and Fig. 7 illustrates the bridge', contact plates and insulating plates in the relative positions they assume before assembly.

The same reference characters are used to designate like parts throughout the drawings. y

The energizing winding 1 of the relay is wound upon a cylindrical core 2 provided with the usual heads 3, 4 of insulating material, such as fiber or the like, the said core protruding for some distance beyond the forward end of the helix. The yoke or return pole-piece 5 is secured atthe rear to the core and is then bentat right angles, passing parallel to the core and terminating near the forward end thereof. The extended forward end of the core may be reduced in cross section and may directly support a pair of metallic plates 7,'8 forming circuit terminals, but in order to provide a more eflicient relay in which the magnetic circuit is completed solely by way of the armature,

I prefer to form the forward extension of the core with a central longitudinal recess into which is fitted a pin 6, preferably of brass or other suitable non-magnetic material, which together with the core Q forms a support for the plates 7, 8, also of brass,

mounted directly upon, but insulated from, the periphery of said pin, and for the helix l, a non-magnetic bridge 19 being provided for supporting the armature 30 at the side of the core, said armature having a Contact playing between the lugs 9 and l() of said plates. lVith a view to compacliicss the upper portion of the platesI and lfiidge arc so shaped as to contorni to the contour of the core. the same when assembled forming practically a continuation thereof. lEach of the4 plates 7, 8 is provided with a rearward springextension 1G to enable convenient connection to be made at the rear to the circuits with which the relay may be associated.

ln order to prevent lateral displacement ot the metallic plates and to anchor them centrally over, but clear ot, the mounting pin G. lugs 14e, 1l" are provided on said plates i', 8 adapted to register with slots 15, 18 respectively in the insulating plates 12, 13, and it will be noted that since the openings in the metallic plates areconsiderably larger than those ot the insulating plates, the liability of said pin short-circuit-ing said plates is eliminated. rllhe remaining openings 32, 33 in the respective insulating plates 12, 13 are idle, not having any function, their presence being due to an advantage in manufacture whereby the cost is cheapened.

lin assembling the relay, the bridge i9, insulating plates 11, 12, 13 and contact plates 7, S are placed together in the rela-tive positions shown in l? ig. Z with their openings alined and the lugs lll and 17 registering.

with openings and 18 respectively. The mounting pin G is then passed through the bridge and plates and threaded into the core, the tightening of said pin lirmly binding the various parts together and to the end ot the core 2. l screw 29 secures said bridge to the yoke, the cars 34h, 35 passing on either side thereof. i

rlhe armature 3@ is ulcrumed to the bridge 19 at the side oit the core extension by means of a pin 23 and serves to complete the magnetic circuit. The said armature carries platinum contacts adapted to rock between the contacts of the plates 7, 8. t convenient armature mounting'for this type of relay is the one shown, which consists of a brass plate 28, provided with an arm, having platinum contacts on each face, adapted to rock between the lugs 9,V 10, the said plate being secured to the armature by a screw 31 and coperating with it to provide a longitudinal groove in which is tightly wedged a pin 23 by means of whichv the said armature and plate are ulcrumed to the bridge 19. The engagement of arms 2d, 25 O said armature with the ears 26, 27 ot said plate prevents relative movement between said armature and plate. A spring serves to maintain the armature normally retracted and is anchored at one end to a downward extension 2l oi" the bridge, and at its other end to a similar extension 22 of the plate 28,

the bridge 19 being cut away to admit of the passage oi? said extension 22.

Having described my invention, claim: 1. ln a relay, a helix, a member extending through said helix, a plurality of contact plates and an armature-support each surrounding said member and being mounted side by side thereon, and an armature movable upon said armature-support.

2., ln a relay, a helix, a supporting member of magnetic material extending through said helix, a bracket mounted upon said supporting member, an armature mounted upon said bracket andmoving in a direction transverse to the aXis ot said helix and cooperating therewith, and contacts mounted upon said support and controlled by said armature in its movement.

3. lin a relay, the combination with a helix, of a core projecting beyond the torward end thereof and provided with an axial opening, a pin secured in said opening and supporting a plurality ot Contact plates insulated from each other and from said core, and an armature having an arm adapted to rock between said plates.

ln a relay, the combination with a helix, ot a core projecting beyond the forward end ther'eoi3 and having an axial opening, of a. cylindrical pin secured in said opening and adapted to insulatively engage a pair ot contact plates, each ot said plates having a lug bent at right angles to the plane ot" said plates and lying in different vertical planes on one side of the said core, and an armature mounted alongside said core extension and having an arm adapted to rock between said lugs.

5. ln a relay, the combination with a helix, of a cylindrical core extending beyond the forward end thereof, of a cylindrical pin of non-magnetic material fitted in an opening in the forward end of said core, a yoke of magnetic material secured to the rear of said core and extending longitudinally of said core, a pair of non-magnetic plates fitting over but insulated from said pin and having extensions passing longitudinally to the rear of the relay, a non-magnetic armature mounting secured to said yoke at its forward end and to said pin, an armature tulcrumed to said mounting and lying in a plane parallel with the core axis, said armature having a laterally extending arm adapted to engage said insulated plates.

6.. ln a relay, the combination with a cylindrical core projecting beyond the torward end ot the helix, et a cylindrical pin ot non-magnetic material iitted centrally in an opening in the forward end ot' said core, a magnetic yoke connected to the rear of said core and terminating near the front of said core, a pair of non-magnetic plates fitted over but insulated from said pin and from each other and each having an ear struck ofi at right angles thereto and lying to one side ot said core in different "vertical planes, a bridge-piece secured at one end to CFK llt)

said pin and at its other end to the torward end of said yoke, an armature fulcrumed my name this 25th day of February A. D., upon said bridge-piece and lying in a plane 1910. v -parallel to the core axis, and a, non-magnetic FRANK R. MCBERTY.

plateseoured to said armature and having Witnesses: 5 an arm adapted to rockbetween said ears. IRVING MACDONALD,

In Witness whereof, I hereunto subscribe MORGAN WASHBURN, J r.

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