US1021881A

US1021881A - Electrical interrupter device.

Info

Publication number: US1021881A
Application number: US46280608A
Authority: US
Inventors: Charles Howard North
Original assignee: North Electric Co
Current assignee: North Electric Co
Priority date: 1908-11-16
Filing date: 1908-11-16
Publication date: 1912-04-02
Anticipated expiration: 1929-04-02

Description

G. H. NORTH.

ELECTRICAL INTEERUPTER DEVICE.

APPLICATION FILED NOV.16, 190s.

1,021,88 1 Patented Apr. 2, 1912.

UNITED STATES PATENT, OFFICE.

CHARLES HOWARD NORTH, OF CLEVELAND, OHIO, ASSIGNOR TO THE NORTH ELECTRIC COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

ELECTRICAL INTERRUPTER DEVICE.

Specification of Letters Patent.

Patented Apr. 2, 1912.

Y Application filed November 16, 1908. Serial No. 462,806.

the county. of Cuyahoga and State of Ohio,

have invented certain new and useful Improvements in Electrical Interrupter Devices, of which the following is a specification.

My invention relates to improvements in electrical interrupter devices, and more particularly to apparatus of this character adapted for use in connection with'the signaling bells upon harmonic telephone lines. These bells preferably are rung by battery currents applied either directly to the line, or transmitted through a converter in the well known manner. With selective currents, however, it is desirable to adjust the frequencies of interruption, and to simplify the apparatus, which is subjected to continuous and severe usage, in every possible way.

My present improvements relate to certain novel mechanical features with respect to the mounting of the vibrating member; the mounting and adjustment of the contact springs and the co-acting contact member, and the adjustment of the frequency of the vibratory member. These features will be more fully explained in connection with the accompanying sheet of drawings, where- 1n:

Figure I is a plan view of an interrupter device, constructed in accordance with my invention. Fig. II is a side view thereof, one of the .electromagnets being removed, and the base portion broken away to illustra'te certain of the features. Fig. III is an enlarged detail slightly broken away showing the mounting and means of adjustment for the contact springs. Fig. IV is a detail showing one of the spring guards, Fig. V illustrates one of the contact springs itself. Fig. VI is a side view showing a vibratory member with its contact and adjusting means. Fig. VII shows a heavier adjustable screw therefor. Fig. VIII is a detail illus trating the adjustment of the magnet poles; and Fig. IX, a diagram showing the preferred circuit connections of the interrupter.

Throughout the several figures of the drawings, I have employed the same. character of reference to indicate similar parts The vibratory tongue or member a, is

provided at its extremity with a weight a, and preferably with an adjustable screw and lock a. The latter, as best shown in Figs. VI and VII, comprise an inner tapped member secured at the ends of wires a, and a thumb-screw, which may be of the required weight, insertible therein. Said vibratory member preferably comprises a curved or looped wire, securely anchored at its rear extremity and carrying between the parallel bars, a contact arm a which with the, weight a, are riveted in place thereon, as best shown in Fig. VI, although my invention is not necessarily limited tothe details above set forth.

By reason of providing the adjustable screw and look a, inasmuch as said screws are made of different weights, there is obtained, within restricted limits, a corresponding adjustment of the rate or frequency of vibration of the tongue or and its contact-arm a resultant from the slight change in the center of gravity secured by inserting diiferent adjustable screws a". These thumb-screws and looks a", as shown in the drawings, are of the simplest form and are inserted longitudinally of the tongue at to insure the desired adjustment and frequency of vibration.- The principal weight a, however, preferably is stationarily riveted upon the looped wire, constituting the vibratory tongue a.

The electro-magnet b 6, preferably is compositely wound, as indicated in the diagram, Fig. IX, the connections thereof affording a series-shunt arrangement adapted for connection with the primary of an induction coil; the windings 6 being in series relation with windings b respectively upon each limb of the electro-magnet. The construction and operation of the foregoing circuit connections are described and claimed in the patent to Engle, No. 921,601, May 11th, 1909, in connection with the structural improvements of my invention herein set forth and claimed. Reference may be had to said patent for ascertaining the particulars, inasmuch as they form no part of the improvements herein set forth. Y

The contact arm a extends upwardly in a position to engage alternatively, the contact springs c a, mounted respectively in spring-guards upon a plate surmounting the electro-magnet. These spring-guards d, together with their respective springs, are

d As shown, each of the contact-springs,.

i which under constant use is liable to deterioration, in consequence is made readily.

removable, butthe circuit terminals 1, 2, are permanently connected with the respective spring-guards, as best shown in Fig. III, so that the connections with the springs may be 'readily made and broken upon securing them in their respective saw-cuts. These springs have a normal-inward set, as thus secured, and are withheld from convergence by means of'the slotted terminal arms (1 upon the spring-guards, which, however, permit the outward flexure of the springs. The base of the interrupter. device is suitably chambered to contain the condenser 6. With the foregoing description in mind, the purposes and advantages of my improved constructionwill now be briefly explained. 1

In practice, each of the interrupters, upon installation is connected in circuit as shown. The adjusting screws 9 g, are separated to such an extent that neither of the contact springs a 0 is in engagement with the vibratory contact a One of these screws, as g is then turned until the contact spring 0 is brought into engagement with the contact of the vibratory member, whereupon it will start under the impulse 6f but a single. magnet. This screw is then turned back slightly, say to the extent of one quarter turn, and the opposing screw g is then turned until the contact 0' similarly is brought into engagement with the contact of the vibrating member, whereupon this screw is also set 1n its adjusted position and the interrupter device continue normally under the impulse of its shunt windings. It will be seen, however that with a slight bias, the vibrating member may be actuated by a single 'electro-magnet, but preferably I employ the arrangement herein set forth. v

The pole pieces f of the electro-magne may adjusted within their slides z toward and mm the vibrating member by means of th rotary eccentric parts f. Said slides i are ormed upon the supporting plate 5, while eccentric; is rotatable within 'a recess f provide .upon one side of each pole 55 p'ce f. The parts are maintained in their adjusted position by nut 71. The vibrating finember, which is securely anchored. at its looped or inner end, under the impulse of the electro-magnet, is oscillated in'ac'cordi'w ance with the frequency to which the individual instrument is adjusted, thereby making and breaking the circuit between the contact arm a and contact springs c c. The rate or frequency, however, is subject to adjustment within small limits by means of magn the screw members a", .and the mounting of the contact arm a, preferably is ara-mag-' netic and serves as an armature or the vibrating member. This, by reason of-its loop construction and firm anchorage, is especially sensitive to impulses from the electroetand accurately vibrates in unison therewith, transmitting current over the circuit with which the instrument may be connected or it may be otherwise applied.

. Having 'now explained the features of my invention, I claim as new and desire to secure by Letters Patent, the following 1. In an electro-magnetic appliance, the combination with an actuating electro-magnet, of an armature,- a supporting-part and a vibratory member comprising a loopedwire free at its outer end and securely held at its looped end by said supporting-part;

said looped wire carrying the armature at 'a distance from its looped end, operatively positioned before the, poles of the electromagnet, substantially as set forth.

2. In avibratory electro-m'agnetic appli- I ance, the combination. with an actuating 'electro-m'agnet, of its armature, a rigid supporting-part and a vibratory meuntingfor the armature comprising an extended arm free at 'its outer end and an attachin loop secured at the other end within sai supportingart, whereby" the rate of flexure is rendered uniform, substantially as set forth.

3. In a vibratory electro-magnetic appliance, the combination with an actuating electro-magnet, of its armature,'a rigid supporting-part, a vibratory mounting for the armature, comprising an extended arm free a-t its outer end and a rearwardly secured loop held within said supporting-part, whereby the rate of flexure is rendered substantially uniform, and means for adjusting the frequency ofthe armatures vibration, substantially as set forth.

4.111 a vibratory electro-magnetic appliance, the combination with an actuating 'electro-magnet, of its armature, a stationary supporting-part, a mounti for said armaits outer extremity and a rearwardly secured loop held within said supportingpart, whereby the rate of flexure is rendered substantially uniform and means associated with the free extremity of said arm for adjusting its rate of vibration, substantially asset forth.

5. In a vibratory electro-magnetic appliance, the combination with an actuating electro-magnet, of its armature, a stationary supporting-part, a mounting for said armature, comprising an extended vibratory arm anda rearwardly secured loop'rigidly held Withinv said supporting-part, whereby the rate of flexure or vibration is rendered substantially uniform, a contact-member also carried by said arm and angularly extended beyond its plane of vibration and a co-act ing contact adapted to be intermittently engaged thereb substantially as set forth.

6. In an e ectrical interrupter appliance,

.the combination with an electro-magnet, of

a vibratory member comprising a looped wire securely mounted at its looped end, a stationary support for saidlooped end, a contact-spring, a contact-arm and an adjustable weight respectivel mounted upon said vibratory member a apted to secure the regulation of the vibratorymovement, substantially as set forth.

7 In an electrical interrupter device, the combination with a U-shaped electro-magnet, of a vibratory member mounted adjacent to said electro-magnet, a support therefor, a contact-arm positioned upon said member between the limbs of said electromagnet and extending to a plane above the electro-magnet and co-acting contact-springs positioned in an upper plane adapted to be engaged thereby, substantially as set forth.

8. In an electrical interrupter device, the

combination with an electro-magnet, of a vibrating contact arm actuated thereby, a spring guard connected in circuit, and a removable contact spring mounted with v said guard in position to be engaged by the contact arm, substantially as set forth.

9. In an electrical interrupter device, the combination with an electro-magnet, of a vibratory contact arm actuated thereby, a saw-cut insulating strip, a spring guard connected in circuit and mounted within the saw-cut, and an associated contact spring removably mounted in said saw-cut adjacent to its guard and in position to be engaged by the contact arm, substantially as set forth.

10. In an electric interrupter device, the combination with an electro-magnet, of a vibratory contact arm actuated thereby, a spring guard, comprising a rearward portion connected in circuit, and an angularly extending slotted part, and a removable contact spring mounted adjacent to said sprlng guard with its end extending through the slotted part in position to be engaged by the contact arm, substantially as set forth.

11. In an electric interrupter device, the comblnatlon with an electro-magnet, of a vibratory contact arm actuated thereby, a spring guard, comprising a rearward portion connected in circuit, an angularly extending slotted part, and adjusting means associated with the spring guard adapted to regulate its position, substantially as set forth.

12. In apparatus of the class described, the combination with an electro-magnet of the armature actuated thereby, a pole piece adjustably mounted adjacent to said armature, and a rotary eccentric member associated with said pole piece to secure its adjustment, substantially as set forth.

13. In an electro-magnetic appliance, the combination with an actuating electro-magnet, of a vibratory armature, an adjustable pole piece positioned adjacent thereto, means for retaining it in line with said armature, and a rotary eccentric member associated with said pole piece and adapted to secure the adjustment thereof toward and from the armature, substantially as set forth.

14:. The combination with an electro-magnet, ofa contact-making armature, a contact-spring, a flexed spring-guard having a slotted end portion through which the spring extends, and screw-adjusting means for regulating the position of contact.

Signed at Cleveland, this 14th day of November, 1908, inthe presence of the witnesses below subscribing.

CHARLES HOWARD. NORTH.

Witnesses:

JESSE A. BUEL, V ALBERT LYNN LAWRENCE.