US940174A - Combined switch and fuse-plug. - Google Patents

Description

P. MAGKINTOSH. COMBINED SWITCH AND FUSE PLUG.

APPLICATION FILED SEPT. 30, 1907.

Patented 'Nqv, 16, 190$ JAIL/ENTER THEDEHZEK ZL ICKZNTUSH.

is a sideelevation, partly in section, of a plugs removed.

preferably or on'rrn acres FREDERICK mnonmrosmfios SCHENECTADY; New Yank, as'smnon ro GENERAL ELECTRIC COMPANY, a conrona'rron or new YORK.

COMBINED SWITCH AND FU$E-PLUG.

specification of Letters Patent. I Application filed September 30, 190?. ficrial No. 395,112.

To all whom "it may concern:

Be it known that I, FREDERICK MAGKIN- 'rosn, a citizen of the United States, residing at, Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Combined Switches and Fuse-Plugs,of which the following is a specification; r .This invention relates to mechanical cutouts, and its objectisto provide a switch of the perpendicular-blade type carrying a fuse which will open the circuit automatically in case of" an overload. Various structures of this general nature have been heretofore proposed, but the novel feature of my invention lies in the use of a (201111118?- cialscrew-threaded fuse-pin inserted in a suitable receptacleon theswltch-blade, and capable of easy removal and replacement in a. manner familiar toevery one accustomed to dealing with ordinary electric lighting circuits.

In the accompanying drawing, Figure 1 switch embodying my improvement, and Fig. 2 is a plan view of the same, showing a double pole switch with oneof the fuse 'lhe'base l is made. of suitable insulating materials, and supports one or more hin eclips 2 and contact. clips 3 each provided with the usual bindingscrews 4: for the attaclnnent'of line terminals. In each hingeclip is pivoted a switch blade, comprising a hinge-portion 5 and a contact-portion 6. In the case of a double-pole or triple-pole switch, the several contact -portions 6 are united by a cross-bar 7 of insulation; carrying a handle 8. V

Rigidly secured to ,each portion of the blade is an arm 9 10 one overlapping the other. One of these arms as 9 supports a receptacle comprising "a cup or socket 11 orcelain, containing a screwthreaded metal lic shell-contact 12. The other arm as 10, projects into said socket through an opening-123- in its sideand is in contact with the shell 12, preferably by passing through an opening 14; in said shell and resting upon an internalflange at the bottom thereof. A plate 150% insulation is laid upon said arm 10, and a. screw 16 is passed down through a Washei:.17, the plate 15 and receptacle.

is screwed into the shell 12, making contact with the upper section, and a center contact Patented Nov. 16, 1909;

suitable holes in the arm 10 and the bottom of the receptacle, finally entering a tapped hole in the arm 9. This screw therefore 56- cures all these parts rigidly together, and it' also serves as the center-contact ofthe -An ordinary screw-threaded fuse-plug 18 60 therewith and with the center-contact 16'and completing the electric circuit between the two portions of the switch-blade; When the fuse in said plug is blown, it is a simple matter to unscrew the plug and insert a fresh one. Inasmuch as screw-plug fuses are commonly used in domestic wiring and. in many other installations carryingcom paratively small. currents, the advantages 0 a switch of this kind are apparent.

What I claim as new, and desire to secure by Letters Patent of the United States, is, l. A switcli-blade composed of twosec tions with their adjacent ends arranged to overlap, insulation interposed betweensaid ends, means for rigidly clamping'said overlapping ends togetlier and plu contacts respectively connectei .to said on s.

2. A switch-blade composed of two sections with their adjacent ends arranged to overlap, an insulating socket having its bottom portion interposed between saidoverlapping ends, a screw shell contact'with in said insulating socket and in engagement bolt connected to the lower section andee tending throu h the bottom of-the \ins'ula ing socket andoperating'to clamp thejsev-j cral parts together. i v 3. A switch-blade composed of two-=11" sulated portions overlapping each other socket of insulation supported on one said portions, ascrew-threaded shell conta having'a flange interposed between thejother of said-portions and the socket, zi -central screw contact securing-said parts together,

and a fuse-plug screwed into said shell and making contactt-herewit-h and with said screw.

at. A switch-blade composedot a hinge portion and a contact-portion, anarin S. cured to each portion, a socket of insulationsupported on one or said arms and having I an opening to permit the other arm to pro 1cc ject into it, a screw threaded shell in said socket in contact with the arm therein, a spectively connected to said ends, and means central screw tapped into the socket sqpportfor rigidly uniting said partsto ether. 10

i arm, 6, late of insulation between the In witness whereof, I have ereunto set head pf sai screw and the other arm; end I my hand this 28th day of Se tember 1907. 5 a fuserplug screwed into said shell. I FREDERICK :MA KIN TOSH.

I 5. A switch blade in two sections, insula- Witnesses:

;;tion; interposed between the adjacent ends MAR ARET E. WOOLLEY,

tl 1ereo f,' together -with plug contacts re- 7 HELEN ORFoRn;

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