US1127106A - Multiple-fuse plug. - Google Patents

Description

' E. STRAN$ZKY.

MULTIPLE FUSE PLUG.

APPLICATION FILED JULY 7, 1914v Patented Feb. 2, 1915.

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Emil Sim szky,

. EMILSTRANSZKY, OE PHILADELPHIA,- BENNSYLVANIA.

MULTIPLE-FUSE PLUG.

Specification of letters Patent.

Patented Feb. 2, 1915.

Application -fi1ed July 7, 1914. SeriaBNo. 849,555.

To all whom. it may concern fBe it known that I, EMlL-STRANSZKY, a .subjectuof the Emperor of .Austria-Hungary, residing. at Philadelphia, in the-county 5 of Philadelphia and- State of Pennsylvania, have invented new and useful" Improvewmen-ts in- Multiple-Fuse Plugs,-of which :the following is a specification.

This invention relates to improvements in multiple fuse plugs for electric circuits.

.In carrying out the present invention, it is my purpose to improve andsimplify the general construction of multiple fuse plugs and to provide a plug whereby thefusible elements may be. connected in. the electric circuit successively .as the same become burnt out %thereby eliminating the necessity -Of-I8II10V111g' the. plug'and inserting a new -one. Itis also-my purpose to provide aplug of the classidescribed'whichmaybe placed finthe circuit rapidly andeasily and which .may be =.manipulated conveniently and -.-q uicklytoplace a new fusible element in the circuitsucceeding the'burning out of one of such elements.

-.With.the' above and other-objects in. view,

qtheuin-ventionconsists .in. the construction,

-- combination and arrangement of .parts -.hereinaftensetforth in and falling within :thel'scope of the claims.

In the accornpanyingv drawing, Figure 1 E is. a-view .in side elevation of a multiple fuse ..-plug=..constructed in accordance .;with :the .presentinvention. .Fig. 2 is. a:longitudinal sectional. .view. .therethrough. Fig.1 3..is an end. view. ofthebody of sthe plng the .cap being removed. Fig. 4 is. an end v1ew .of\the cap. Figi 5..is a similar opposite end of the cap.

Referring now I to the drawing in :detail, l designates the body-of the. lug constructe'dof porcelain-orother insu atingmaterial and preferably. circular in cross section, one end -of-thebody. being circumferentially. res ,duced as-at 2 and externally sorewthreaded as at .3 so that the .samemay enter the socket or-(receptacle. Formed in the tudinally thereof and centrally? disposed is a bore 4 through which is. passed a'shank 5 havingone end formedwrtha. head 6 in contactwiththe end portion of the reduced extremity of the body. and forming. a contact adapted to be connectedto one side of 'an electric circuit, and .the opposite end pro- -.jecting beyond the adjacent extremity of adjacent end vwall-of .the recess and lahuttmgv the adjacent face of the securing .Illlt, such spring acting to hold the contact .view-- showing; the

- :jmeta'llic shell 15 body 1 1ongi-' the body, while formed in the last-men- -tioned end of the rotation thereon is a cap 8-composed of porcelain or other suitable insulating material and arranged concentrically of the shank and placed in face to face contact with the face of the cap 8 is an annular row of contact studs 9 disposed concentrically of the shank and fitting into the depressions 7,

while formed in the outer face of the cap 8 centrally thereof is-a recess 10 provided with a cup-shaped lining 16 having the outer edgethereof bent-upon itself to provide an annular flange lying against the outer surface of the cap concentrically of -therecess and forming a conductor ring 11 withwhich are connected a number of fusible elements;;12..radiati 1i'g' from such ring of the body. On the inner and having the outer ends thereof connected with. the contact studs 9' respectively, the fusible elementsbeing embedded in the outer end or face of the cap 8. Threaded onto the extended=end of the shank 5- and .:di.sposed.within.the recess 10 is a securing nut l3 'while surrounding the shank within the recess isa coiled expansion-spring 14 havingone end in .engagement'with the end the opposite extremity studs seated in. the recesses and force the SlZIKlS/IIIlZO such. recesses in the turning of the cap on the body. The outer surface of the. circumferentially reduced end portion "of the. body 1 is preferably inclosed in a adapted to connect with the other side of the electric circuit and threaded through the opening in the body .is a contact screw 16 having one end electrically connected with the shell 15 and.the opposite end projecting into one of thede- .pressions 9.=so that the fusible element 12.

connected with the stud seated within the particular depression will be connected 1n the electric clrcuit and whereby the'fuslble elements may be connected in the electric circuit successively in the rotation of the 'cap.

From the foregoing description taken in connection with the accompanying drawing, the construction, mode of operation and manner of employing my invention Wlll be readily apparent. When the devlce is placed in an electric circuit the contact formed by the head 6 engages one contact in the recepthe next adjacent. fuse into the circuit and in the initial movement of the cap, the latter moves outwardly along the shank against the action of the spring 14, incident to the studs riding out of the depressions, and in the continuedmovement of the cap the studs reenter the depressions and a new fusible element is thus connected in the circuit in which the device is installed, the spring 14 reseating the studs when the latter register with the depressions. When the device is used to carry heavy currents, a wire is employed to connect the upper end of the shank 5 to the ring 11, as clearly illustrated in Figs. 2 and 5 of the drawing, such wire insuring the proper carryingv of the current independently of the spring and lining.

While I have herein shown and described one preferred form of my invention by way of illustration, I wish it to be understood that I do not limit or confine myself to the precise details of construction herein de-' scribed and delineated, as modification and variation may be made within the scope of the claims without departing from the spirit of the invention.

I claim:

1. A multiple fuse plug comprising a body formed centrally with a longitudmal bore and having one end thereof formed with an annular row of depressions concentrically of the bore, a shank within the bore havin one end thereof provided with a forming a contact adapted to be connected to one side of the electric circuit and the opposite end projecting beyond the end of the body having the depressions therein,

a cap surrounding the last-mentioned end of said shank concentrically thereof and rotatable thereabout and in face to face contact withthe adjacent end of the body, an

" annular row of contact studs on the inner face of said. cap concentrically of said shank and fitting into the depressions,fusible elements carried by said cap corresponding in number with the studs, connections between said elements and studs respectively, a common connection between said elements and shank, and a contact screw adapted to be connected to .the other side of the circuit carried by said body and having one end thereofprojecti'ng into one of said depressions whereby'the fusible elements may be trically of the bore, a shank within the bore having one end thereof provided with a head forming a contact adapted to be connected to one side of the electric circuit and the opposite end projecting beyond the end of the body having the depressions therein, a cap surrounding the last-mentioned end of said shank concentrically thereof and rotatable thereabout and in face to face contact with the adjacent erld of the body, an annular row of contact studs on the inner faceof said cap concentrically of said shank and fitting into the depressions, fusible elements carried by said cap correspending in number'with the studs, connections between said elements and studs respectively, a common connection between said elements and shank, a contact screw adapted to be connected to the other side of the circuit carried by said body and having one end thereof projecting intooneof said depressions whereby the fusible elements may be connected in the circuit successively in the rotation of the cap, said common connection comprising a conductor ring carried by said-cap concentrically of said shank, and a wire connecting said ring andshank.

3. A multiple fuse plug comprising a body formed centrally-with a longitudinal with an annular row of depressions concentrically of the bore, a shank within the bore having one end thereof provided with a head forming a contact ada ted-tobe connected to one side of the electric circuit and the o posite end projecting beyond the end of t e body having the depressions therein, a cap surrounding the last-mentioned end of said shank concentrically thereof and rotatable thereabout and in face to face contact with the adjacent end of the body, an annular row of contact studs on the inner face of said cap concentrically of said shank and fitting into the depressions, fusible elements carried by said cap corresponding in number with the studs, connections between'said elementsand studs, respectively, a common connection between said elements and shank, a contact screw adapted to be connected to the other side'of the circuit carried by said body and having one end thereof projecting into one of the depressions whereby the fusible elements may be connected in the circuit bore and having one end thereof formed ios thereof, a cap in face to face contact with said end of the body, an annular row of contact studs on the inner end of said cap and disposed within said depressions, a plurality of fusible elements carried by said cap and side of the electric circuit whereby the fusiformed in one end concentrically o ble elements may be connected in the circuit successively as said cap is rotated. 5. A multiple fuse plug comprising a body having an annular row of de ressions f the axis thereof, a cap in face to face contact with said end of the bod an annular row of contact studs on the inner end of said cap and disposed within said depressions, a plurality of fusible elements carried by said cap and connected to said studs respectivel means carried by said body and disposed within one of the depressions therein to engage the stud in such depression and adapted to be connected to one side of an electric circuit, a connection between the remaining terminals of said fusible elements and the other side of the electric circuit whereby the fusible elements may be connected in the circuit successively as said cap is rotated, and a spring holding said cap in engagement with the body and said means in the particular depression.

I In testimony whereof I aifix my signature in presence of two witnesses.

EMIL STRANSZKY. Witnesses:

E. EDMONSTON, Jr., JOHN J. MCCARTHY.

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