US1493002A - Timer for gas engines - Google Patents

Description

May 6 {1924. 1,493,002

P. L. OBRIEN .7

TIMER FOR GAS ENGINES Filed March 22 1922 Hill amvcmtoz FLiZzplQB/uien N um I mm.

Patented May 6, 1924.

UNITED STATES PATENT OFFICE.

PHILIP L. OBRIEN, OF BOSTON, MASSACHUSETTS, ASSIGNOR, BY MESN E ASSIGN- MENTS, TO LOWELL TIMER COMPANY, OF LOWELL, MASSACHUSETTS.

TIMER FOR GAS ENGINES.

Application filed March 22, 1922.

T 0 all whom it may concern.

Be it known that I, PHILIP L. OBRmN, a citizen of the United States, and a resident of the city of Boston, county of Suffolk, and State of Massachusetts, have invented a new and useful Improvement in Timers for Gas Engines, of which the following is a specification.

The object of my invention is to provide a timer which will be durable and reliable in operation and simple and efficient in construction and positive in its action. This object is accomplished by my invention, one embodiment of which is hereinafter more particularly set forth.

For a more detail description of my invention, reference is to be had to the accompanying drawings, forming a part hereof, in which- Figure 1 is a sectional view of a timer embodying my improvement, and

Figure 2 is a sectional view, taken on the line 2-2 of Figure 1, looking in the direction of the arrows.

Throughout the various views of the drawings, similar reference characters designate similar parts.

My improved timer 1 has a casing 2 adjacent to the end of a suitable shaft 3 of a gasoline engine of the explosive type which is supposed to run continuously and synchronously with the main shaft of the engine. This casing 2 has a number of insulated and fixed contacts 4 which are connected to the spark plugs of an engine in the conventional manner. This casing 2 may be shifted in the usual way so as to provide for the proper functioning of the apparatus.

The shaft 3 carries a bushing 5 which is fixed thereon as by a set screw 6, or in any other suitable manner, and this bushing carries a flange 7 which is preferably made integral therewith and onthis flange is a pin 8 which carries a rocker 9 which is preferably shaped, as shown. One arm 10 of this rocker 9 carries a spring pressed contact plug 11 of the conventional kind and the other end 12 carries a fibre plug 13 and this end 12 is pressed by a leaf spring which is fixed by a. screw or other suitable means 15 to the bushing 5.

hen the shaft 3 turns, as indicated by the arrow in Figure 1, the plug 11 leads the Serial No. 545,768.

plug 13 and these plugs are preferably placed so that their angular distance is a little over one hundred degrees so that as this shaft 3 revolves, the contacts 4 will be wiped by the plug 11 with a make and break on each contact 4, which will cause a good and proper spark to immediately be made in the engine, whereby the best results are secured. If desired, the arm 9 may be reversed and the plug 13 made to lead and the plug 11 to follow. Whichever way this device is used, a good, clean, sharp break will result from the structure above described, as the plug 13 is the dominant plug because it is pressed by the spring 14 against a contact a, and therefore it will cause the plug 11 to engage another plug it and dis-engage, as above set forth. In other words, the plug 13 acts as a cam to govern the movement of the plug 11, the contacts 4 being the surfaces against which the plug 13 engages. Furthermore, the plug 13 will wipe the contact surfaces of the plugs 4 and keep them clean. All these advantages cooperate to produce the desirable results, above described.

Vhile I have shown and described one embodiment of my invention, its is obvious that it is not to be restricted thereto, but that it is broad enough to cover all structures that come within the scope of the annexed claims.

Having thus described my what I claim is:

1. In a device of the class described, a stationary casing with fixed contacts mounted therein, a shaft adapted to be driven in proper relation to the speed of an engine, means for pivotally mounting a rocker in proper relation to said shaft, said rocker being provided with an electric circuit closing contact at one end and an insulated contact at the other, and means for pressing the insulated contact against the fixed contacts so that the circuits will be abruptly broken when the movable elec tric contact leaves the fixed contacts.

2. In a device of the class described, a stationary casing having a number of contacts with inclined faces at one end, a shaft having a flange fixed thereon, a pin fixed in said flange, a rocker pivotally mounted on said pin and provided with a contact making contact at one end and an invention,

insulated contact at the other and a spring connecting said shaft and the end of the rocker with the insulated contact.

8. In a device of the class described, a stationary casing with a series of fixed contacts mounted therein, a rocker and means for mounting the same so that it Will shift adjacent to said fixed contacts, a circuit. closing device atone end of said rocker and a guiding and insulating substance at the other end of said rocker and means for pressing said guiding and insulating substance against the fixed contacts so that electric circuits may be abruptly made and broken by the contact carried bysaidrocker. In testimony whereof, I have hereunto set my hand this 20 day of March, 1922.

PHILIP .L. OBRIEN.

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