US1206296A - Alarm device. - Google Patents

Description

v A. E. 80688, i ALARM DEVICE. APPUCATION FILED FEB.3,1915.

Patented Nov. 28, 1916.

INVENTOR J Addison 30995. BY

' ATTIORNEIY 4 UNITED strArEs PATENT clar on.

ADDISON E. BOGGS, OF PITTSBURGH, PENNSYLVANIA, ASIGNOR TO WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

ALARM DEVICE.

To all whom it may concern Be it known that I. ADDISON E. Boone, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny andv particularly to devices that indicate by either an audible or a visible signal, the trip- I metal having its edgesbent at right angles ping of a circuit interrupter.

The object of my invention is to provide a compact and easily constructed alarm-controlling device that maybe adapted to circuit interrupters of well known construction.

The usual alarm devices for indicating the tripping of a circuit interrupter must necessarily be set when the circuit interrupter is closed in order that it may operate correctly upon the tripping of the-interrupter. Since thesetting operation is one that may be neglected by operators, I provide a device that is automatically set when the interrupter is closed, irrespective of the position its parts have assumed prior to the closing operation. I further provide means for manually silencing or rendering the alarm inaudible after the interrupter has been tripped.

Figure 1 of the accompanying drawing is a fragmentary view of a circuit interrupter embodying my invention, and Fig. 2

' is a rear view of the alarm device shown in Fig. 1.

A bellrank lever 1 is pivotally mounted upon a pin 2 that is supported by a bracket 3 on the frame work 4. The frame work 4:

' constitutes a part of a circuit interrupter and is mounted on an insulating panel 5 that has an opening 6 therein in which the bracket 3 is disposed. The bell-crank lever 1 constitutes the main operating lever of the circuit interrupter to which my invention is applied.

In order to indicate when the circuit interrupter has been automatically tripped, I

provide an alarm device 7 that comprises a member 8 which is pivotally mounted, at a point 9,.on brackets 10 that project from a supporting plate 11. The plate ll'is sub stantially trapezoidal in shape and has an opening 12 therein that is formed by slitting the plate 11 and bending portions of the same at right angles to constitute the brackets 10. A second bracket 13 is formed by bending a portion of the plate 11, near its Specification of Letters Patent. Application filed February 3, 1915. Serial No. 5,877.

Patented Nov. 28, 1916.

loweredge, at right angles to itself. To this second bracket or projection 13, is attached one end of a spring 14, theother end of Which is attached to a similarly formedprojection 15 on the inner end of the member 8.

A member 16 is pivotally mounted at a point 17 near the outer end of the member 8 and is provided with a handle 18 for purposes hereinafter-more fully set forth. i

The member 8 consists of a flat strip of to constitutesubstantially a channel member, and is adapted to engage, at its inner end a stationary contact terminal 19 that is sup-v ported by an insulating member 20 upon the plate 11. A second'terminal member 21 is attached to the plate 11 by a screw 22 for the purpose of receiving a conductor. Theparts 19 and 21 constitute the terminals of an annunciator circuit 23 comprising a source of electromotive force24 and a bell or other annunciator device 25. The plate- 11 may either be grounded to .the frame work 4 of theinterrupter or it may be insulated therefrom, according to whether or not a grounded circuit is desired. i

When the lever 1 is in its lowest position, it engages the member 8 and causesthe disengagement of the same from thei contact. terminal 19. However, when the member 1 rises, by reason of the tripping of the circuit interrupter, the member 8 will be biased by the spring 14: intosuch position that the inner end of' the' member 8 willengage thev con tact terminal 19, thus completing the cir-v cuit- 23 to cause the bell- 25 to operate. The. audible signal, thus given, will cause an at tendant to notice the tripping ofthe circuit interrupter. In order for him to prevent the bell from ringing further, the handle 18 7 17 will cause the member 16 to turn upon its pivotal point 17. when the member 8 is moved downwardly until it assumesa position substantially parallel. to the lower portion of the member 8, as shown in the lower the panel 5 by means of bolts 26 or by any other suitable means.

While I have-shown my invention in its preferred form, it is capable of being variously modified, and I desire that only such limitations shall be imposed as are set forth in the appended claims.

.I claim as my invention:

1. An alarm device for a circuit interrupter comprising a pivotally mounted arm, a member pivotally mounted on the said arm, a stationary contact member and means for yieldingly holding the said arm in engagement \vith'the stationary contact member and the movable member of the circuit interrupter.

2. An alarm device for a circuit interrupter comprising a stationary contact meniber, a main pivotally mounted arm, a second arm pivotally mounted on one end of the main arm that is adapted to engage the operating lever arm of the circuit interrupter and means foryicldingly holding the said mall pivotally mounted arm in engggement with the stationary contact memr and the lever arm of the circuit interrupter.

3. An alarm device for a circuit interrupter comprising a stationary contact me libel", a main pivotally mounted arm having an auxiliary arm pivotally mounted thereon, and a spring for yieldingly holding the said main arm in engagement with the stationary contact member and the operatilig lever arm of the circuit interrupter, said auxiliary arm being adapted to engage the operating lever arm of the circuit interrupter under predetermined conditions.

4. An alarm device for a circuit interrupter comprising a stationary contact member, a main pivoted arm having an auxiliary arm ivoted thereon, and a spring for yiel ingly holding the main arm in engagement with the stationary contact member and the lever arm of the circuit interrupter, said auxiliary arm being ada ted to move the main pivoted arm out o engagement with the stationary contact member when it is moved relatively to the main pivoted arm.

5. A device for indicating the movement of a lever arm, comprising a pivotally mounted arm having a pivotally mounted member thereon, a stationary contact terminal, and a resilient member for effecting the engagement of the contact terminal and the pivotally mounted arm under predetermined conditions and for maintaining the pivotally mounted member in engagement ed on the pivotedarm and having a handle thereon, a stationary contact member and means for yieldingly holding the pivoted arm in engagement with the movable member and the stationary contact member, said pivoted member being adapted-to eflect disengagement of the contact member audthe pivoted arm when it is turned.

In testimony whereof, I have hereunto subscribed my name this 30th day of- Jan., 1915.

ADDISON E. BOGGS.

Witnesses:

ALvix \V. Mrurrra, B. B. HINES.

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