US690750A - Sparking-coil. - Google Patents

Description

Patented Jan. 7, |902.

' M. I-l. MOFFETT.

SPABKING COIL. (Application mod l'e'b. 9, 1901.) (un Model.)

- NITED STATES PATENT' OFFICE.

MARCUS H. MOFFETT, OF CLEVELAND, OHIO, ASSIGNOR TO THE NATIONAL CARBON COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF NEW JERSEY.

SPARKING-COIL.

SPECIFICATION forming part of Letters Patent No. 690,750, dated January '7, 1902. Application iiledTebruary 9, 1901. Serial No. 46,662. (No model.)

To all whom it may concern:

Be it known that I, MARCUS H. MOFFETT, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in sparking-Coils, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing.

The invention relates to a sparking-coil or, more exactly, to the means whereby such a coil is protected from injury and Vis rendered fool-proof without impairing its efciency.

The invention consists in the construction and combination of parts hereinafter described and claimed.

In the drawing the gure is a central vertical sectional View showing my invention.

Referringtothe parts by letters, A represents a sparking-coil of ordinary construction, and B represents a metal case in which it is sealed. The spool of the coil has end iianges c c', made of wood or some other nonconductor, which flanges are of slightly greater diameter than the wire coils D and substantially t the case B. I

K represents an insulating-disk, which is placed in the bottom of the case to protect the core J from contact with the case.

The terminal wires of the coil pass out through openings in the upper head c. It is most convenient to have the opening through which the terminal from theinnermost turn of the coil passes simply a drilled hole, as shown at the right of the figure, while the terminal from the outermost turn is more easily accommodated by a slotted opening, as shown at the left of the head c.

The binding-posts E E of the coils pass through and are secured to, but are insulated from, the cover b of the case, and the ends of the wires ct d' of the coil are secured to said binding-posts inside the cover. An insulating-ring F, preferably made of wood and of substantially the same diameter as the anges c c', rests upon the upper ange c and surrounds the ends of the wires a, a', the inner ends of the bindin gposts, and the connections between said wires and binding-posts, thereby protecting them. After the coil and this ring have been placed in the case the cover b is soldered or otherwise sealed to the top ot' said case. The coil is thereby protected from moisture, from mechanical injury, and :from all danger that the connections between the wires and binding-posts shall be tampered with; but the efficiency of the coil is not in any wise impaired.

'. Gr represents a strip of insulating material through which the binding-posts pass andl which lies between .the enlarged end of said binding-posts and said cover.

' H represents insulating-washers, which embrace the threaded inner ends of the bindingposts and lie between the nuts I I and the cover, said inner ends of the binding-posts, washers, nuts, and ends a' lying, as before stated, in the space within the ringFandbetween the upper ange c and the cover of the case.

Having described my invention, I claiml. A sparking-coil consisting of amore having a head at each end and a coil of wire around the core between the heads, the terminal wires of said coil extending through openings in the upper head, combined with a metallic case snugly embracing the coil and extending beyond the upper end thereof, a

distance-ring within the case outside of said terminal wires at the upper end of the coil and substantially llin g the space to the head of the case, a metallic head for said case, and a pair of binding-posts insulatingly carried by said head and projecting into the space within said distance-ring, said terminal wires being clamped to said binding-posts within said space, substantially as described.

2. A sparking-coil consisting of a central core, a pair of circular insulating-heads surrounding the core at each end'and a coil of wire around the core between the heads, terminals of said coil projectingV at one end through openings in the head, combined with a cylindrical metallic case snugly embracing the coil and extending beyond the end thereof, an insulating distance-ring within the case nroundsaidprojeetingterminals and between teriel clamping the ends of said terminals, the adjacent head of the coil and the end of substantially as described.

lO the ease, the case being sealed up by an end In testimony whereof I hereunto aix my plate, insulating material on the inner side signature in the presence of two Witnesses. and outer side of said end plate, binding- MARCUS H. MOFFETT. posts extending through said insulating mal Witnesses:

teriztl and clamped thereto, and binding-nuts E. B. GILCHRIST,

on the inner side of the inner insulating ma.- l

E. L. THURSTON.

Images