US844578A - Spark-coil. - Google Patents

Description

PATENTED FEB. 19, 1907.

J. F. GAVANAGH.

SPARK COIL.

. l xPPLIoATIoN FILED 31121328.1905.

WITNEESEE 7 INVENTDH UNITED sTATEs PATENT oEEroE.'

JOHN F'. CAVNGH, OF PROVIDENCE, RHODE ISLAND.

SPARK-COIL.

Specification of Letters Patent.

Patented Feb. 19, 19o?.

Application iiled September 28, 1905. Serial No. 280,531.

.a spark-coil of few parte and inexpensive construction, which will be Waterproof', in which the coil and oon'nectionswill be protected. from injury, and the coil secured and sealed without the employment of the wooden heads commonly used for those purposes.

To these ends my invention consists ci the novel construction. combination, and arrangementof parts hereinafter' described and claimed.

In the accompanying drawings, Figure l is a side elevation ci my sparlecoil, partly in l section. Fig. 2 is en end view of .my coil with ordinary binding-posts. Fig. 3 is an end view of my coil with the coil-wire connections concealed within the coil-protecting case. Fig. 4 is a side elevation ot the saine with parte broken away to show a section ot one oi the connections. Fig. 5 is a sectional View of the coil connection.

The core A with its covering B and the coil wound thereon with the core ends )rejectloeyond the ends of the coil-win ing are in' allc the ordinary construction.

D represents a block of wood somewhat longer than the core and preferably of rectangular cross-section, provided with a central longitudinal bore not extended entirely through the block and of somewhat greater diameter than the coil (l and longer than the core A. The block D thus iorins a case or tubeI openat o1. e end and integrally closed at the other end.,

The core A with its surroundii'ig coil C is inserted in the bore of the block D until one end ofthe core rests upon the bottoni or Hoor of the bore with the corresponding end ci the coil some distance above said floor and the other end of the core projecting likewise heyond the adjacent end of the coil and ending at a point within said bore sonne distance from the open end of said bore. The core and coil are so located in the bore as to forni an annular space. around the coil and the projecting ends of the core with some unoccupied space between the end of the core and the open end of thehore. I iill this annular space and the unoccupied space between the core end and the open end oi the bore with an insulating-wax E, poured therein in a molten state and allowed to cool and harden, thereby `forming a waterproof envelop around the coil and heads filling the 'here around the prejectng ends ot the core at each end of the coil-winding and a seal for the o enend ofthe bore. rli'hc heads serve to ho dv the core and coil securely in place and the envelop gives the required rigidity to the coil-wires, while the whole is sealed within the hre and protected by the case D against injury.

P 'P represent ordinary hindingosts extending through one side of the bloc D, near one cn'd thereof, into the coil-containing here, wherein-the terminal ends of thecoil-wire are secured to them by solder s.l

F F represent tubular connections set l'lush in one side of the block D near one end thereof and extending therethroiigh into the coil-containing hore and secured 1n place by thesetscrewsjj", tapped into said connections joer-v pendicularly to their bore G with their heads set Hush wrththe end ot' the block D. The terminal ends of the coil-wire are inserted in 'thc bore G and therein secured by solder noted that in this fornL of construction the v connections are concealed within the block D, and thereby protected Jfrom injury.

I claim as in v invention and desire to secure by Letters Patcnt- A spark-coil consisting of a core and ar coil oilwire wound thereon, said core ends projecting beyond the ends oi thev coil-windlng, in combinationV with a case provided with a bore longer than said core and of greater diinnctcr than said coil, and having one intcgrnlly-closcd end and one open end, and adapted to'l'oriu hoth an annular space around said core and coil inserted therein, and a space hctwccn ontl cud of said core and the open cnd of said here, wire connections extcnding'outward from said bore through one side or' said oase near one end thereof, the terminal ends of thc coil secured to said connections within said bore, and a body of in- YOU sulatng-wox filling the portion of said boi-,e unoccupiod by tigo coro and coil to thoiel y Consfituto an unllzu waterproof envelop for said coil, waterproof insulating-heads surrounding Lho core ends and. adapted to hold the coro-minding in place, :md i1` waterproof insulating-svn] 'for Smd Caso.

two witnesses.

JOHN F. CAVA'NAGIU Witnesses ELMER WALKER, ISAAC N. LINCOLN.

ivetimony whereof I have signed my name to this specl'hcatlon 1n the pioscmcc pf

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