US723032A - Fuse-plug. - Google Patents

Description

UNITED STATES` SIDNEY ROTHSCHILD,

PATENT OEEicE.

OF NEW YORK, N. Y.

FUSE-PLUG.

SEECIFICATION forming part of Letters Patent No. 723,032, dated'March 17, 1903.

Application filed June 23, 1902.

To a/ZZ whom; it m/fty con/06172,:

Be it known that I, ASIDNEY RorHsoHILD, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and Stateiof New York, have invented a new and Improved Fuse-Plug, of which the following is a full, clear, and exact description.

The invention relates to conductors of electricity having an interposed fuse of lead or other metal capable of destruction by an excessive current.

The object of the invention is to provide a new and improved fuse-plugwhichl is simple and durable in construction, cheapto manufacture, easily repaired in case the plug burns out, and arranged to insure a secure connection between the ends of the circuit-Wires to be joined.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a side elevation of the improvement, showing the casing-cover in section. Fig. 2 is a transverse section of the same on the line 2 2 of Fig. l, and Fig. 3 is a sectional plan view of the same on the line 3 3 of Fig. 2.

The casing A of the fuse-plug is made of porcelain or other suitable non-conducting material and is formed at its bottom with a depending flange A', through which extend from opposite sides conductingwire terminals B B', secured inside of the casing to posts() C'Y in the shape of bolts held loosely in openings in the casing, as plainly indicated in Fig. 2. The bolts C C' are slotted at their upper ends to receive the lower ends of the conducting or contact plates D D', adapted to be connected with each other at their free ends by a fuse in the shape of a ring E, of lead or other metal having a low melting-point- The plates D D' are preferably made of spring metal and extend on opposite sides of the post A2, forming part of the casing A and provided on opposite sides with recesses A3, eX- tending upwardly and inwardly to receive Serial No 112,806.

corresponding V- shaped tongues D2, struck up from the plates D D', near the free ends thereof, so that when the nuts C2 of the bolts ,C C' are screwed up then the tongues D2 are moved in firm engagement with the walls of the recesses A2 to securely holdthe plates D D' in position at their upper ends on opposite sides ofthe post A2. The casing-cover F is in the shape of an inverted cup and is likewise made of porcelain or similar non-conducting material, and on the under side of the top of the cover is formed a lug F' i-n the shape of a frustum of a cone, fitting into a correspondingly-shaped recess in the upper end of the post A2, so as to hold the cover F in proper position relative to the casing to'securely inclose the fuse-ring E, plates D D', and the upper ends of the bolts or posts O O'. It will be noted that the post A2 is tapered or conical and that the spring-plates D D' conform to the shape of the post. Now in case a fusering E burns out it is only necessary for the operator in charge to remove the cover F, place a new fuse-ring over the upper end of the post A2, and slip the ring upon the free ends of the plates D D', so as to connect the same with each other by means of the ring. The plates D D' may be provided near their upperends with small lugs D3 to prevent the ring E from slipping down too far on the platesv D D'.

From the foregoing it will be seen that the device is very simple and durable in construction, cheap to manufacture, and convenient (No model.)

"access is had to the various parts to permit making repairs whenever they are necessary.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination, with a fuse-plug post of the spring-metal plates arranged on opposite sides of the same and curved inward at their upper ends, the same forming the terminals of an electric circuit, and a fuse-ring made of such diameter that it is adapted to pass over the extremities of saidplates before coming in contact with adjacent portions of the same, substantially as shown and described. I

2. A fuse-plug having a casing of non-conducting material ,provided with a central post, conducting-plates on opposite sides of the IOO said post, and a fuse-ring slipped over the post, to engage the free ends of the said plates, to connect the latter with each other, as set forth. i

3. A fuse-plug'having a casing of a non-conducting material, bolts held adjustably in the said casing and arranged to receive the terminals of circuit-Wires, spring-plates held on the said bolts, and extending on opposite sides of the casing, and a fuse-ring adaptedY to engage the free ends of the said plates, as set forth. Y

4. A fuse-plug having a casing of a non-couducting material and provided with a central Y post having recesses on opposite sides, bolts held on the said casing, plates securedfon the said bolts and having tongues engaging the said recesses, and a fuse-ring for engaging the free ends of the said plates, as set fort-h.

5. A fuse-plug having a casing provided with a central post, a removable cover for the said casing, having a lug engaging a recess in the upper end of the said post, bolts held .in the said casing and extending Within the SIDNEY ROTHSCHILD.

Witnesses: i

HARVEY FLEMING, JOHN C. BEHLMER.

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