US2026381A - High voltage primary cut-out - Google Patents

Description

Dec. 31, 1935. G. H. FIEDLER HIGH VOLTAGE PRIMARY CUT-OUT Filed Maron 13, 1934 g v f////////////////// ik W 8 t w Cal Patented Dec. 31, 1935 UNITED STATES PATENT OFFICE George H. Fiedler, Rochester, N. Y., assignor to General Electric Company, a corporation of New York Application March 13, 1934, Serial No. 715,312

4 Claims.

My invention relates to high voltage primary cut-outs and has for its object the provision of indicating means for indicating the condition of the circuit through the cut-out.

Another object of my invention is to provide indicating means for enclosed fuse cut-outs which will indicate an open circuit through the cut-out while maintaining the cut-out and the 'casing cover in their respective normal operating positions.

For a better understanding of my invention, together with other and further objects thereof, reference is had to the following description,

taken in connection with the accompanying drawing, and its scope will be pointed out in the appended claims.

The accompanying drawing illustrates a sectional side view of a high voltage primary cutout for outdoor use equipped with a signaling device built in accordance with my invention. The signaling device is shown in its closed-circuit indicating position in full lines and in its open-circuit indicating position in dotted lines.

Referring to the drawing in detail, the cut-out comprises mainly an enclosing casing I which contains the stationary contact clips 2 and 3 for a fuse 4 and a closing cover 5 which supports the fuse and moves it into engagement with the contact clips 2 and 3 when the cover is moved into closing position on the casing I.

The casing I comprises a rectangular receptacle madeof thick porcelain and cast into a single piece. The casing is open in front and is provided with two petticoat insulators B and` 'I cast integral with the back of the casing, by means of whichthe casing may be conveniently mounted. The Contact clips 2 and 3 are respectively mounted on bosses 8 and 9 projecting from the back in the casing. Ilhe clips may be mounted on the bosses in any convenient manner. The particular method illustrated comprises a collar II, wedged into a hole I2 in the boss, into which the screw I3 is turned. Cables to the clips may be brought into the casing through two conduits I4 and I5 in the side of the casing and may be attached respectively to the cable terminals i6 and I1 which are connected to the clips 'and are supported adjacent the inner ends of the conduits. The cable terminal I6 is attached to a terminal strip I8 by a screw I9, which in turn is held in contact with fuse clip 2 by a screw I3. The terminal I1 is attached similarly to a terminal strip 2D by a-screw 2I and the strip 20 is held in contact with clip 3 by another screw I3.

The fuse 4 is mounted onA the cover 5 by means (Cl. 20G-121) of a spring clip 23 which engages the lower section of the fuse and a collar 24 which engages the upper end of the fuse 4. The spring clip 23 is similar to the clips 2 and 3 and simply engages the lower part of the fuse` It is attached to the 5 cover 5 in any convenient manner. The collar 24 is mounted upon a boss 26 projecting inwardly from the cover and is attached thereto by means of a tongue 2l projecting from the collar at approximately 45. The surface of the boss 28 be- :10 ing vertical, the collar 24 is positioned about 45 to the normal operating position of the fuse when it is so attached.l This construction provides an easy method of mounting the fuse on the cover. In order to mount the fuse, it is only l5 necessary to insert the upper end of the fuse into the collar 24 while holding the fuse at approximately 45o to the cover and then moving the lower end of the fuse inwardly'into engage-` ment with the clip 23. This movement brings the 20 outer end of the fuse into intimate contact with the edges of the collar and is held there by a U-shaped spring 2B which is mounted underneath the collar tongue and exerts pressure against the fuse.

The cover which may be either hooked or hinged at the bottom may be forced into position by means of an integral loop 28 cast upon the upper iront portion of the cover. When the cover is in this position thecasing i is completely closed and the fuse 4 is simultaneously moved into engagement with the spring clips 2 and 3.

In accordance with my invention, the cover 5 is provided with a signaling vane 3D comprising a plate oi any convenient material and preferably approximately the area or size of the cover 5. It is provided at its lower end with a pair oi arms 3l projecting vertically from the vane over the edges of the cover 5. The arms are pivoted by means of pivot screws 32 on the cover so that the vane may be held in a vertical position parallel to the cover 5 or in a horizontal position at right angles to the cover. An opening 33 is provided in the vane so that the loop 29 may project therethrough and permit the mounting of 45 this vane close to the cover.

The signaling vane is further provided with a latch hook 34 which projects through a hole 35 in the cover 5 when the vane is parallel. to the cover. This hook projects through the cover 50 and engages a latch 36, which in turn is pivoted on an arm 31 mounted on the inside of the cover 5. The latch 36 is normally moved upwardly against a stop 38 by a spring 40. In this position, the latch 36 engages the hook 34. The latch 55 'to the' face of the cover.

^may be tripped by a latch arm il which extends over the upper end of the fuse t and is operated by a plunger l2 which moves upwardly when the fuse circuit is broken.

The fuse l is of the rei'lllable expulsion type and is provided at its upper end with a springoperated plunger d2. It comprises an insulating tube J3 containing the fuse link lili which is attached at its respective ends to leads l5 and 66. The lead 55 is attached to a metal contact sleeve d'1 at the lower end of the fuse and is locked of the' sliding sleeve and clamps the disk 50 be-- tween. itself and the web. The contact sleeve 52 is screwed on to the upper end of the fuse sleeve i3 and is lalsoprovided with a web through which the insulating tube projects. When the fuse link 44 ,is intact, the sliding sleeve 5I is moved downwardly against the pressure of a spring 5t, the sleeve 5I being pulled down inside of the contact sleeve 52 until a slight shoulder on the sleeve engages the end of the contact sleeve 52. A thimble provided with an opening through its top is screwed over the end of the contact sleeve so that when the plunger and sliding'sleeve are in this position theend of the plunger 'ls ush with the thimble. When the fuse link 46 then'breaks the plunger is moved upwardly into engagement with the tripping arm il of the latch 66 and thus disengages the hook 34. This enables a `spring 55 on the vane to move the signaling vane into the horizontal position indicated in dotted lines in the drawing'.

In operation the fuse d, with the plunger retracted, is mounted on the cover and the signaling vane is latched into the position parallel 'I'he fuse and cover are then moved into the operating position where the fuse engages the contacts and the cover closes the casing and protects the fuse and the contacts.r When the fuse link breaks, due to an overload or any other reason, thev plunger trips the latch and the signaling vane drops into its horizontal position. My invention, therefore,

'provides a simple method of indicating the condition of an enclosed fuse without interfering(- with the protecting casing.

fuse link breaks.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. In a cut-out device, the combination of a fuse, a casing therefor, a cover for said casing,

a signaling member having substantially the 5 2. In a primary cut-out, thercombination of an 15 outdoor casing provided with stationary contacts,

a cover for said casing, a fuse supported thereby and moved into engagement with said contacts when said cover is in position to close said casing, a signaling member comprising a vane hav- 20 ing substantially the same area as said cover pivoted on saidv cover, means for maintaining said member in one signaling position parallel to said cover when the said fuse is operative, and meansoperated when said fuse breaks for moving said 2 member into a second signaling position substantially at right angles to said cover vwhereby the cover is concealed in the rst position of said member and exposed in the second position thereof. 30

'operating said latch and moving said signaling vane into a second position.

4. In a primary cut-out device, the combina tion of a casing and a cover therefor, a signaling 45- member pivoted on the outside of said cover, latching means provided on theinside of said cover for holding said signaling member in one position, Vand a fuse mounted within said casing provided With'a fuse link and a retractible plung- 50 er for operating said latch and moving said signaling member to a second position when said `GEORGE H. EIEDLER.

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