US795497A - Spark-timing device. - Google Patents

Description

No. 795,497. 7 I PATENTED JULY 25, 1905 G. A. ELS ASSBR, JR. & P M. ELSASSERL SPARK TIMING-DEVICE; APPLICATION IILBD I'EB. 17.1904- ATTORNEYS AND PAUL M. ELSASS PENNSYLVAXIA.

PATEXT OFFICE.

SPARK-TIMING DEVICE.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed February 17, 1904- Serial No. 193,942.

To all whom it mayconcern:

Be it known that we, GEORGE ALFRED EL- SASSER, J r., and PAUL MAR ELsAssER, citizens of the United States, and residents of Philadelphia, in the county of. Philadelphia and State of Pennsylvania, have invented a new and Improved Spark-Timing Device, of which the following is a full, clear, and exact description.

()ur invention'relates to a device for timing the electric igniting spark in gas-engines and the like.' I

The objects of our invention are to secure in devicesof this character simplicity of operation and construction, accuracy in timing, accurate and simple adjustment, small cost of production, compactness, wide range of speeds, and ready adaptability-for all kinds of gas, gasolene, andall other explosion engines employing the electric j um p-spark for the ignition of gas.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional view of certain parts of a gas-engine with one form of our invention attached and shown in elevation. Fig. 2 is an enlarged view of certain parts shown in Fig. 1, portions thereof being in section. Fig. 3 is a sectional view on the line 3 301 Fig. 2, and Fig. 4 is a view similar to Fig. 2 of another form of our invention.

Our invention comprises a pair of bars a I), made of spring-brass or other metal and entirely insulated from each other at their supporting ends by the fiber or other insulating washers c and the bushing 0 formed of similar material. They are fastened togetherby means of a bolt Z passing through the bushing 0 One of the bars, preferably the upper one, a, is made longer than the other fora purpose to be described. The lower bar 6 is designed to be adjusted up and down. In Figs. 1, 2, 3 a cam (Z is shown for this purpose attached to an arm 6, which is shown as secured in position relative to the bar 6 by'means of the bolt Z. The cam is designed in this instance to be operated by a connecting-link f and hand-lever g, which is designed to move over a ratchet h, adapted to hold it in any-desired position. The ratchet is carefully insulated from the ground by plates or supports it. A shaft 7? is designed to rotate continuously while the engine is moving and carries a cam j. As shown in Figs. 1 and 2, this cam is adapted to press upon the bar a and bring it down into contact with the bar 6, thereby forming an electrical connection through the battery 8 and the primary t of the inductio' pass through the secondary t, wires q 1, and spark-plug p, f

m represents a gas-engine cylinder of any construction, and n a piston working therein.

0 is a bracket attached to the cylinder or other desired part of the gas-engine, and to tbhils the bars a I) are secured by means of the In the construction shown in Fig. 4 the parts a, Z), c, and Z are the same as those described above. In place of the arm 0, however, an arm 0' of modified construction is used, having a screw-threaded end in which turns a thumb-screw Upon the arm e is a' piece of spring-brass or other material 3 having a sharpened end fitting in the thread of the screw andada sired position.

The operation of this device is very simple. The bar 6 may be adjusted by means of the cam d or the screw win any desired position with respeotto the bar a. The bar 6 is formed of spring metal and: so fixed as to bear down" wardly upon the cam d or screw :0 in the lowest position thereof. Therefore when these adjusting devices are operated to raise the-bar b it will be forced upwardly toward the bar a, and the distance between them beinglessened the time of the spark will be correspondingly regulated. The ti two bars a and b are normally aboutaquarter of an inch apart. When the cam j bends the bar a into contact with the bar 6, it immediately closes the prim wires 9', which willca battery of the i cite the secondary coil 25', which will cause a spark to be produced in the cylinder by means ary circuit through the s/to flow through the primary coil t of the spark-plug. It is thus seen that as soon as the bar a comes into contact with the bar 6 a spark is produced in the cylinder. Now if the bar 6 is moved up nearer the bar a the latter when bent down by the cam j will come into contact with the former at an earlier time and the s the explosion of the engine.

It is obvious that other adjusting devices earlier and increasing the speed ER, or PHILADELPHIA.

.-coil through wires '2- 1', which causes a current to pted to hold it in any de-' me is varied as follows: The

use the current from. the

nduction-coil, and this in turn will expark will occur sooner, making "ticular forms shown.

may be employed than those shown, and we do not wish to limit our invention to thepar- The device shown in Figs: '1, 2, and 3 is designed especially for all engines other than stationary ones; but in stationary enginesthesimpler device (shown in Fig. ll may be used.

The shaft is does not have to, bean addi-' tional feature of the machine, but-may be a shaft used to operate a valve or other partof -springmaterial and insulated from the first.

-bar,.an ind notion-coil, electric connections between the induction-coil and said bars, electric connections between the induction-coil and the spark-plug, a cam for forcing one. bar toward the other and adjusting the distance between them, and means for bringing the two bars nto contact.

2; In a timing device, the combination of a spark-plug, apair of bars formed ofspring material, one of said bars being longer than,-the

other, means for supporting said bars near one end, means for lns ulating said bars from each other and from their support, electrical connections from said spark-plug to each of said bars, means for adjusting the free end of the short bar to and from the other, means for holdingfsaid adjusting'means in adjusted positlons, and-additional means for temporarily ,forcing the longer bar into contact with the shorter bar.

3, The combination of a spark-plug, electric connections thereto, a pair of spring-bars insuvlated from each other, each one joined to said electrical connections, a cam for adjusting one of saldbars'toward-and from the other, means for forcing said bars intocontact with each otherqandmeans for holding said adjusting cam'in'adesired position. v

. In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

GEORGE A. ELSASSER, J R. PAUL M. ELSASSER.

\Vitnes ses: Rrom). H. REILLY, GEORGE A. ELSASSER.

Images