US835982A - Device for regulating the electric spark of gasolene-engines. - Google Patents

Description

No. 835,982. PATENTED NOV. 13, 1906.

' H. O. PHILLIPS. DEVICE FOR REGULATING THE ELECTRIC SPARK OF GASOLENE ENGINES.

APPLICATION FILED DBO.19.1905.

WITNESSES, Zv I/NVENTBRI Q Rt 85 E \MH s WWW w,

UNITED STATES PATENT oEEIoE.

HERBERT O. PHILLIPS, OF'WARWICK, RHODE ISLAND.

DEVICE FOR REGULATING THE ELECTRIC SPARK 0F GASOLENE-ENGINES.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed December 19, 1905. Serial No. 292,470.

To all whom it may concern;

Be it known that I, HERBERT O. PHILLIPS, a citizen of the United States, residing at the town of Warwick, in the county of Kent and State of Rhode Island, have invented certain new and useful Improvements in Devices for Regulating the Electric Spark of Gasolene- Engines, of-which the following is a specification.

This invention is for use on that class of gasolene-engines having a make-and-break spark-plug, the device being mounted in the side of the en ine-cylinder and arranged to trip the latchever,,which is pivoted on the reciprocating bar of the eccentric-rod connection; and the object of the device is to permit of regulating the proper time in making the electric spark for firing to increase the power or slacken the speed of the engine, as may be desired.

The invention consists of the novel con- I struction, arran ement, and combination of parts as hereina ter described and claimed.

In the accompanying sheet of drawin s, Figure 1 represents a perspective view of t e device embodying my improvements. Fig. 2 is a side sectional view, taken in line a: '00 of Fig. 3, illustrating the" device secured in the side of the engine-cylinder and with its cover removed and showing the contact-plug and its cam for operating the same. Fig. 3 is a view, partly in section and partly in elevation, taken in line 1 y of Fig. 2. Fig. 4 is a perspective View of the operating-cam. Fig. 5 is apartial view of a gasolene-engine cylinder having my improved device mounted thereon and also illustrating the relative position of the latch-lever in contact with the device prior to the spark-firin Fig. '6 is a similar view illustrating the re ative position of parts, as after the spark-firing. Fig. 7 is a detail view of an ordinary make-and-break spark-plug and its rocker-arm connections.

'Like reference characters indicate like parts.

' a designates a narrow metallic block having an integral stem a, which is provided. with an exterior screw-threaded portion o to engage thereby in a threaded opening formed in the side of the en e-cylinder b.

c is a nut mounted on the t readed portion of the stem a and arran ed to im inge against the cylinder in hoIding the lock firmly in position thereon.

Theblock a is provided with a circular recess a and an opening a entering the same.

pin R eferring to Fig. 5, Z is the 'connectiorrto the reciprocating-bar m, which carries the bell-crank'or latch lever 70. Onv

with a screw-threaded portion to engage thereby with a threaded nut g. This nut g has'an opening therethrou h to loosely receive theshank portion of file pin f h is a coil-spring interposed between the nut g and pin f and arranged to keep the head of the latter in contact with either of the fiat surfaces 1, 2, 3 4, and 5 of the cam e.

Around the outer edge of the disk-cover d is provided index-marks, as at d d in Fig. 1,

which marks correspond'in number with the.

series of contact-surfaces of the cam e'.

On the projecting portion of the cam-rod e is secured an index-pointert and sleeve 3', respectively, and which latter member acts as a handle to operate the device.

Each of the cam- surfaces 1, 2, 3, 4, and 5 increase successively in distance from the axial centerof the cam, so that by rotating the rod e the cam causes the pin f to move in- 'wardly or outwardly of the block to the fixei position desired to operate in tripping thelatch-lever is either early or late to fire the electric spark.

In Fig. 2 I show the cam set to correspond to the lndexmark 3 in 1 and which registers the medium position for firing the spark. In Fig. 2 the surface 1 of the cam represents the slowest position for firing the spark. Thus as the cam is set in the 3 position, as shown in said figure,it indicates a quicker position for firing before the piston reaches the end of its upward stroke. v

In starting the engine the index-finger i is the cam in contact upon the head of the eccentric-rod "at the index-point 5 and the highest part of the bar m is secured a flat spring a to force sald lever 7c in an upward position and against a shoulder formed in the bar m, as at a point m. m is a rod having one end se-- cured in the bar m and its opposite portion mounted in thehub of a bracket o,;Which-is secured to the cylinder-head b. 1) is a coil I What I claim, and desire to secure by Let-5o push-spring interposed between the hub of the braoketo and a collar (1, which is loosely mounted on'the rod m In one of the guideplates 1" of the harm is secured a rod 8, which forms a stop for the .rocker-arm i to bear against after the spark has been fired. This arm t is beneath and forced in contact with the collar g by a coil-spring u. The rockerarm t is secured upon a short shaft t, which enters through the side of the cylinder 1), and on the inner portion ofsaid arm t is secured a second rocker-arm t, that contacts with the spindle o of the spark-plug w.

These parts last described represent the common construction to operate in conjunction with the usual fixed bolt (not shown) for tripping the latch-lever 7c in making the spark.

Assuming that the eccentric (not shown) has nearly reached the upper end of its stroke, the vertical arm of the latch-lever 7r first contacts with and forces the collar q upwardly, thereby causing the spring pressed rocker-arm tto follow beneath and in contact with said collar, and at'the same time the inner rocker-arm 15 will have come in contact with the firing-pin a, and thus the electrodes come together and complete the circuit. scribed, as the eccentric continues to carry its bar m upward the remainder of its stroke,

the horizontal arm of the latch-lever 7c con-v tacts with the proj ecting portion of the pin f of the blooka, causing said lever'to be released from connection with the collar and the spring p, being of greater tension t an that of the spring u, instantly forces said collar down I upon and causes the arm t to again bear upon the end of the rod 8 in the position shown in .Fig. 6, thus causing a separation of the electrodes and breakingthe circuit.

From this description it will be understood that my device readily permits of raising or loweringthe contact-pin f to trip the latch-lever in making an early or late spark firing in explosive engineshaving a make-and} break spark-plug, according to the .power required of the engine.

After this movement ofparts as deters Patent, is I 1. The herein-described dev1ce ;'c0m'pr1sing a block having an integral screwthread-' ed stem and said block provided with a re-' cess; a disk-cover secured on said block and provided with a series of index-marks; amod loosely mounted and projecting through saidbloek and its said cover; an index-finger secured on said rod; a cam secured onsaid'rod within the recess of said block, and said cam disposing a series of fiat surfaces, each of which increases successively from and around the axial center of said rod; a pin loosely mounted in said block, projecting therefrom and having an enlarged integral head, and a coil-spring interposed between said block and the head of said pin and adapted to force the latter in contact with either flat surface of said cam, substantially as shown and for the purpose specified.

2. In a gasolene-engine having a sparkplug and a latch-lever for tripping the rele'asing mechanism to make orfbreak the electric spark ofsaid plug, the combination therewith, of a block adapted to be secured on the engine cylinder and provided with a recess,

and an opening entering the same, respec-' tively; a sprin -pressed pin mounted in the opening of sai block, projecting therefrom and arranged to trip the latch-leverof the releasing mechanism; a disk-coverse'cured on said block and provided with a series of indeX-marks; a rod loosely mounted on said cover and said block; an index-finger secured on said rod a cam secured on said rod within the recess of said block, and said cam having a series ,of flat surfaces arranged to contact upon the .pin, whereby the same is moved either inwardly or outwardly from the block to make an early or late trip ing' contact with the latch-lever, substantial y as set forth. a

In testimony whereof I afiix my signature in presence of two wltnesses.

HERBERT O. PHILLIPS. Witnesses:

H. PECK,

GEO. W. CAMPBELL.

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