US625146A - Relay - Google Patents

Description

Patented may la, |899. P. coLEmAN.

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No. 625,146. Patented May I6, |899. J. P. COLEMAN.

RELAY.

(Application lod my 25, 1898.) (In Model.) 3 Sheets-Sheet 2.

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No. 625,146. Patented May I6, |899. J. P. COLEMAN.

RELAY.

(Application Bled Hay 25, 1898.) (No Model.) 3 Sheets-Shack 3.

WITNESSES: INVENTOR,

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UNITED' STATES PATENT OFFICE.

.IOI'IN PRESSLEY COLEMAN, OF EDGEIVOOD PARK, PENNSYLVANIA, ASSIGNOR TO TIIE UNION SYVITCH AND SIGNAL COMPANY, OF

SVISSVALE, PENNSYLVANIA.

RELAY.

SPECIFICATION forming part of Letters Patent No. 62 5,146, dated May 16, 1899.

Application filed May v25, 1898. Serial No. 681,710. (No model.)

To all Y1071/0771, t ntf/,y concern.:

Beit known that I, JOHN PREssLnY Conn MAN, a citizen of the United States, residing at Edgewood Park, in the county ofAllegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Relays, of which improvements the following is a specification.

The invention described herein relates to certain improvements in double-pointed relays.

In the construction forming the subjectmatter of application, Serial No. 667,265,1iled January 20, 1898, it will sometimes occur when the magnets are feebly energized and one end of the armature is nearer its pole of the magnet than the opposite end of the armature to its pole that only the former end of the armature will be attracted, so that only one circuit will be closed.

The object of the present invention is to insure the movement of both contact-plates against their contact-points under all conditions when the magnets are energized.

It is a further object of the invention to protect the relay as against injury from lightning or other abnormally heavy currents.

The invention is hereinafter more fully de scribed and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a sectional elevation of my improved relay, the plane of section being indicated by the line I I, Fig. 2. Fig. 2 isa plan View of the under side of the relay. Figs. 3 and 4 are sectional elevations, the planes of section being indicated by the lines III III and IV IV, respectively, in Fig. 2. Fig. 5 is a View similar to Fig. 4, illustrating a modilication of my improvement; and Fig. 6 is a top plan View of the relay. y

In the practice of my invention the magnets are held in position with their lower ends projecting through the top plate 2 by means of bolts 3, having one end connected to the supporting-frame 4 of the magnets and their opposite ends secured in the top plate 2. The

armature 5 is secured to a lever 6, attached l to a pin or shaft 7, whose conical ends are mounted in similarlyshaped holes in the ends of supporting-pins 8, screwing through lugs 8, formed on the under side of the top plate 2. On the under side of the lever 6 are formed lugs, one of which is provided with a conical hole for the reception of one end of the pin 9, while the opposite end of said pin is mounted in a hole in the end of a screw 9, passing through the other lug on the armature-lever. As clearly shown in Figs. 1, 2, and 3, the pin 9 is mounted at right angles to the armature, so that a plate l0, secured to said pin midway of its length, will lie parallel to but below the armature 5. To the ends of the plate 10 are secured the contact-plates 11 11, butthe latter are insulated from the plate l0. These' resilient contact-plates are so proportioned as regards their length that when the armature is attracted to the magnet they will be drawnagainst the contacts 13 and 13, which are preferably constructed inA the form of binding-posts passing through the top plate 2, but insulated therefrom. The lower ends of these posts are provided with sockets or recesses for the reception of carbon blocks 14, adapted to serve as contact-surfaces for the posts. It is preferred to coat these carbon blocks, except the contact-face, with copper or other conducting material and to secure them in' position in the binding-posts by solder. rIlhe back contacts for the contact-plates 1l and 11L are formed by screws 15 and 15, passing through bars 16 and 16a. As shown in Figs. land 2, one end of these bars is supported in but insulated from atbracket 17, formed on the lower side of the top plate 2. The opposite ends of the bars are secured to the lower ends of the binding-posts 18 18, passing through but insulated from the top plate 2.

In lien of securing the contact-plates 11 and 11' rigidly to the carrier-plate 10 one or both thereof may be pivotally mounted to the carrier-plate, as shown in Fig. 5. A desirable construction for so connecting the contactplates to the carrier-plate consists .of an arm 19, secured to the plate 10 adjacent to itsend, and a block 20, secured to the contact-plate 11, said arm and block `being pivotally connected together by a pin 21. As shown in Fig. 5, the block 2O is between the outer or IOO left-hand end of the Contact-plate and the pivotal pin 21, so that the rear or right-hand end of the contact-plate will be normally held by the Weight of the block against the carrierplate 10, but is prevented from making eleotrieal connection therewith by insulating material on the under side of the plate or upper side of the'eontaet-plate.

It is customary to arrange a shunt-circuit, which may be elosed Whenever the magnetsl are denergized or may be closed only Whenthe magnets are denergized and the front oroperative end of the contact-plate sticks or is welded to its contact-point. Then it is desired to close the shunt-circuit on each reverse movement of the armature, the contact-pins and 15a are arranged on the bars 16 and 1G, as shown in Fig.4,and are provided by preference With platinum points. W'hen the shunt-cireuitis to be closed only in oase ofthe adherence of the contact-plates to their front point-s, the pins 15 and 15 have their points formed o' insulating material, and additional contactpoints 22, provided with platin um points, are passed through the bars 10 and 1G, so that When the contact-plates turn on their pivotal supports they will come in Contact with these additional baek eontaets, as Clearly shown in Fig. 5. In ease it is desired to Close the shunt-circuit in the construction shown in Fig. 5 every time the magnet is denergized, whether the Contact-plate is fused to its front Contact or not, the pins 15 22 are provided With platinum contact-points and both pins are included in the shunt-Circuit.

The bindingposts 13 13? 1S 1S and the binding-posts 23 25"L and 24 2l for the track and signal circuits are secured, as heretofore stated, in the top plate, but insulated therefrom. In order to protect the relay from lightning or other abnorm ally-heavy Currents, disks 25 with serrated edges are secured upon the binding-posts, as clearly shown in Fig. 5. These posts are made of suoli a diameter -that the points of the disk on one post will be adjacent to but not in Contact with the points of a disk on the adjacent binding-post, and the air-gap should be such as to prevent the passage of a normal current, but not to present too great a resistance to abnormal eurrents. By loosening the clamping-nuts Which hold these disks in position the latter can be adj usted around so as to bring new points into position when other points have been burned away.

I claim herein as my invention- 1. A magnet having in combination therewith a pivotally-mounted lever having an armature seeured thereto, a carrier-plate pivotally mounted with a freedom of automatic movement on the armature-lever, and contact-plates attached to said Carrier-plate, substantially as set forth.

2. A magnet having in combination a pivotally-mounted armature-lever, a carrier-plate pivotally mounted on said lever, and contactplates pivotally mounted on the Carrier-plate, substantially as set forth.

In testimony whereof I have hereunto set my hand.

JOHN PRESSLEY COLEMAN iVitnesses:

DARWIN S. WoLooTT, F. E. GAITHER.

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