US1030413A

US1030413A - Electric ignition device.

Info

Publication number: US1030413A
Application number: US39926207A
Authority: US
Inventors: Joseph J Lombardi
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-10-26
Filing date: 1907-10-26
Publication date: 1912-06-25
Anticipated expiration: 1929-06-25

Description

J. J; LOMBARDI. ELECTRIC IGNITION DEVICE. APPLICATION FILED 00126, 1907.

Patented June 25, 1912;

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ELECTRIC IGNITIOhT DEVICE;

speciflcatipn of Lettcrs Patent. I

Application filed October 26,1907. Serial No. 399,282. I

To all whom it may concern: i

Be it known that I,-JosnrH J. LOMBARDI,

a citizen of the United States, and resident of the borough of Manhattan, in the city and State of New York, have invented a new and useful Improvement in Electric Ignition Devices, of which the following is a specification.

My invention relates to an improvement in electric ignition devices and has for its object to provide certain improvements in the construction, formand arrangement of the several parts of an electric ignition device whereby the liability of misfiring due to the sparking pointsbecoming covered with soot or the completion of the electric circuit from the electrode to the base of the device before reaching the sparking point is obviated.

A further object is to provide means for easily and minutely adjusting the relation of the sparking points so that the gap between .thelii maybe increased or diminlshed in' the very slightest degree and locked in such position wlthout the necessity of bendthe electrodesis denoted by land it is'pro-j in s in whiching or distorting the parts.

-A practical embodiment of my invention isrepresented in-the accompanying draw- 30 igure l is a longitudinalcentral section through the device, Fig. 2 is a side elevan tion of the same, and Fig. 3 is an inner end' view of the device. o

The conducting wire which forms one of vided at its inner end with a sparkin 2 offset from the axis of the com? 'wire. This conducting wire ispreferably screw-threaded exteriorly for a portion of point its length for-the. purpose of securing the .wire to the insulatmg block 3. This insulating block 3 surrounds the conducting -wire 1 for a considerable portion of its length, which block comprisesla reduced tubular-portion 4 and a cup-shaped enlarged ortion 5. The means for securing the conducting wire 1 to'theinsulating block comprises a' shoulder 6 which may be a. nut

' screwed onto the wire in position to engage the block within the cup-shaped portion,

and a nut 7 arrang d in position to engage the. outer end "o *said insulating bloc Washers 8, 9, may be interposed between the nuts 6; 7, and the insulating block.

The hollow base 10- embraces the cup-' shaped'end of the insulating block, said base ucting being provided with an interior annular shoulder 11 which is engagedby the inner end of. the cup-shaped portion of the insu- 'lating block. Between the inner-end of the,

insulating block and the interior annular Patented June 25, 1912'.

shoulder 11 on the base, a'washer 12 is inserted, which washer is composed of some suitable packing material, preferably mica. V

A cap 13 embraces the reduced portion of the insulatingblock and has a screwthreaded engagementlwith the outer end of the base 10. A washer 16 of some suitable packing material, preferably vegetable fiber, is interposed between the annular shoulder 15 formed by the reduction of the exterior dimension of the insulating block, and-the inner end 14 of the cap 13. .These washers 12 and- 16 serve to prevent leakage between the insulating block and base and also allow the insulating block to expand slightly under the influence of heat, thus preventing the block from cracking or breaking.

i The base 10 has an enlarged outer portion .17 and also a reduced inner end portion 17*, which portion 17 is intendedto be brought into communication with the combustion chamber of an internal combustion engine.

This reduced inner-end portion 17* may be provided with an exterior screw-threaded portion for permitting. its engagement with the cylinder wall of the engine in connection with which the device is to be used. The end of this reduced end portion of the base .is provided with a circular aperture 18 -wh1ch is so situated. as to be eccentric to the 5 axis of the conducting wire 1 when the parts of the ignition device are "in assembled adjustment. By making'the aperture eccen oint of ing the sa'me'at an angle to'the conducting wire so; that as the conductin wire is turned,

the sparking point will be rought toward and away rom the wall of. the aperture. After the parts have been adjusted with the greatest accuracy to the pomt which W111 'g-oduce the best results,the lock nut! may conducting wire to the ase. ment also prevents any tendency on the part end of .is s aced a considerable distance -from the conductingI wire servin e ec tightened so as to secure the parts in said adjustment.v This adjustment of the spark p is an important feature of my invention or' the reason that the slightest variation in the distance between the s 'arking points affects the value of the spal lr. ,4 1 The walls' of the recess 19 in the reduced portion 17 of the base form a continuation of the walls of the recess 5" in the cupshaped inner portion of the insulating block 3 so as to form a sparking chamber around the conducting wire 1. Also b projecting the inner ortion of the con ucting wire centrally t rough the recesses in the cupshaped plortion of the block and the reduced t e baselO, the said conducting wire wal of the base and-the wall of the insulating block, thus obviating possibility'of short-circuiting b the continuous deposit of carbon which will brid e the space from the his arrangeof the current to 'ump between the wire and the base at an ot er place than at its sparking points.

his construction also tends to prevent the accumulation of carbon deposit gnd'koil in the recess 5* of the insulating An 1 ition devlce constructed 1n accord- .anee w1th m V invention will be extremely strong and urable and can be used for a long time without cleaning, the inclosed chamber surrounding the inner end of the 7 to produce a self cleaning twhich w point on the conductingwire'and the walls of the aperture clean and thus at their highest efliciency.

t e said conducting wire and an an le to the axis of the latter.

my invention, I have sign keep the sparking What I claim is:

1. An electric ignition device comprising a hollow base portion, an insulating block fitted therein, a conducting wire rotatably mounted in the insulating block, the said base portion being provided with a true circular opening in its inner end eccentric to the axis ofthe said conducting wire, and a s arking point secured to the inner end of projecting at 2. electric ignition device comprising a hollow base portion, a hollow insulatmg block fitted therein and provided with a cupshaged portion, a cap for holdin the block in t e base, a conducting wire 0 relatively small diameter rotatably mounted in said block, and a sparking po1nt fixed in the inner end of the conducting mm and projecting at an angle to the axis thereof, said base portionbeing provided in its inner end with a true circular opening eccentric to the axis of the said wire, whereby the rotation of the said wire will cause the said point to approach or recede from the walls of said open- 1n g at an even rate while the conducting w1re proper remains the same axial distance from the walls of the said openings, and the I said recesses in the block and base bein so arranged as to form a continuous ho ow chamber of uniform diameter about ducting wire proper. o

' Intestimony, that I claim the foregoing as ed my name in presence of two witnesses, this twenty-third day of October 1907.

' JOSEPH J. LOMBARDI. Witnesses:

F. Gnonon BARRY, HENRY THIEME.

the con-