US2170698A - Fuse support - Google Patents

Description

-v -s. R. SMITH, JR 2,170,698

FUSE SUPPORT Filed Jan. 11, 1939 F igJ.

2/ 5 I, 26 ,13 29 'INSUL-ATION Inventor: Sidney R1 Smith,JTt, by w His Attorney.

Patented Aug. 22, 1939 2,170,698

UNITED STATES PATENT OFFICE 2,170,698 FUSE sorroa'r Sidney R. Smith, Jr., Pittsfield, Mass., assignor to General Electric Company, a corporation of New York Application January 11, 1939, Serial No. 250,372 3 Claims. (Cl. 200133) The present invention relates to supports for manner as to leave an end free for connection electric fuses and has for an object the provision purposes. of an insulating support particularly adapted for, The body of the fuse support comprises a but not necessarily limited to, the mounting of porcelain insulator l4 suitably formed to pre- 5 fuses such as are commonly employed for provent electric creepage thereacross. Mounted re- 5 tection of transformers from secondary faults, spectively on opposite ends of this insulator are isolation of service entrance faults, banking of terminal elements of simple and identical contransformer secondaries and similar purposes. struction, which is of advantage from the stand- In cases where it is desired to install secondary point of manufacturing cost. Each of these term fuses in the simplest and most economical manminal elements includes a screw-threaded split ner, it is a practice frequently employed in the connector stud l5 which is secured to the correart to insert a'secondary fuse directly between sponding end of insulator I in any suitable and in series with two line conductors or transmanner, as for example, by cementing the inner former leads without employing any mechanical end of the stud in a recess in the end of the support, other than the conductors or leads insulator as indicated at it. The outer end of i5 themselves, for the fuse. Usually this proves the stud has a transverse slot 11, as best shown entirely satisfactory. However, in some installain Fig. 2, for reception of a conductor, and is tions it has been found that vibration of the provided with a contact clip l8 and nut IQ for supporting conductors or leads, due to various clamping a conductor in the slot. The split concauses, may impose such strains on the fuse as nector stud at one end of insulator It is clamped 20 to impair its efiiciency and reliability of operato the bared portion I3 of line conductor H for tion. Under such conditions it is desirable to suspension mounting of the fuse support, and provide for the fuse a separate support to relieve the free end of line conductor 12 is joined to the the fuse itself of objectionable strain, but such split connector stud at the other end of insu- 26 separate supports as heretofore proposed have later It. v 5 not been entirely satisfactory due to complica- Each of the terminals includes also a metallic tions in construction or installation or to undecap 20 secured by welding or other suitable means sirably large increase in cost of the fuse installato stud i 5 and arranged to fit over the correu spending end of insulator I4. Each of these caps 80 It is therefore one of the more specific objects has an arm 2| formed integrally therewith and of the present invention to provide an improved arranged to project laterally to one side of infuse support for mounting on a line conductor or sulator I l. The free ends of these arms are other part of an overhead secondary construcdisposed in spaced relationship and provided tion, which support lends itself to quick and with quick detachable screw clamps 22 for con- '6 ready installation and is of extremely low cost, nection with opposite ends of a fuse device sup- :5

simple and rugged design. ported and electrically connected between the Other objects and the details of that which I arms. consider to be novel and my invention will be- The fuse support of my present invention is come apparent from the following description suitable for the mounting of several forms of do and the claims appended thereto taken in confuse devices. However, for purposes of example, junction with the accompanying drawing in I have illustrated a fuse of a form disclosed in which Fig. 1 illustrates an exemplary fuse inmy previous application Serial No. 173,761, filed stallation embodying a support constructed in November 10, 1937, and assigned to the assignee accordance with my invention, and Fig. 2 is an of the present invention. This fuse comprises an exploded view showing the construction and arinsulating fuse tube 23 having therein a fuse 45 rangement of certain of the parts of the support link, including a fusible element 24 and a strain of Fig. 1. wire 25, with flexible cable extensions 26 of the In the exemplary installation shown on the fuse link extending respectively from opposite drawing, the fuse support is employed in conends of the tube 23 through sealing washers 21 junction with a common type of strain insulator, and 28 and closure caps 29. The illustrated fuse, 50 designated III, which serves mechanically to join, or any other suitable form of fuse employed, may in a well known manner, two line conductors ll be readily connected between arms 2| by atand I2. Conductor II is bared at H for attachment of the fuse link cable extensions or tachment' of the fuse support thereto, while conother fuse terminal means to thes'crew clamps Bl ductor I2 is attached to insulator I. in such 22. If desired, the arms 2| may be fixed so as 5 normally to impose tension on the fuse link. The replacement 01' a blown fuse between arms 2| may be effected easily when the fuse support is mounted on a line conductor in the manner shown; or, for greater convenience and safety, the insulating support may be quickly detached from both the line conductors for refusing.

From the foregoing it will be seen that l. have provided an improved fuse support which may be employed practically and economically for suspension mounting of a fuse device on a line conductor or the like and which entirely relieves such fuse device from any strains resulting from vibration of the supporting conductors or any other cause. It is contemplated that modifications in the form and dimensions of the fuse support illustrated may be required to accommodate it for various installations and various sizes and ratings of fuses to be supported thereby. It is intended however that such modifications as do not depart from the true spirit of the present invention shall come within the scope of the appended claims.

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

1. A fuse support adapted for suspension mounting on a line conductor or like supporting means, comprising an elongated insulator, a terminal element aflixed to one end of said insulator and having means for quick detachable clamping attachment to a supporting conductor, a second terminal element afiixed to the other end of the insulator and having means for quick detachable clamping attachment to a second conductor, a pair of conducting arms conductively associated respectively with said terminal elements and projecting laterally from said insulator in spaced relationship, and clamps carried by the free ends of said arms for quick detachable connection respectively'with terminals of a fuse device to support such fuse device between said arms.

2. A fuse support adapted for suspension mounting on a line conductor or like supporting means, comprising an elongated insulator, a pair of threaded connector studs respectively amxed to and projecting axially from the opposite ends of said insulator, each of said studs having a transverse slot for reception of a conductor and cooperative means for clamping a conductor in said, slot, a pair of arms mechanically and conductively associated respectively with said studs and projecting laterally from said insulator in spaced relationship, and clamps carried respectively by the free ends of said arms for quick detachable connection respectively with terminals of a fuse to support such fuse between said arms.

3. A fuse support comprising an elongated insulator, a pair of threaded connector studs respectively aflixed to and projecting axially from the opposite ends of said insulator, each of said studs having a transverse conductor receiving slot anda cooperating clamping nut for clamping a conductor in the slot, a pair of metal caps mechanically and electrically associated respectively with said studs and fitting respectively over the ends of said insulator, each of said caps having an integrally formed arm projecting laterally to one side of the insulator in such manner that the arms are in spaced relationship, and clamps carried by said arms for quick detachable connection respectively with terminals of a fuse to support such fuse between said arms.

' SIDNEY R. SMITH, JR.

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