US1547030A - Timer for fords and fordson tractors - Google Patents

Description

July 21, 1925.

A. C. CASTILLO TIMER FOR FORDS AND FCRDSON TRACTORS Filed Feb. 8, 1922. 2 Sheets-Sheet 1 Iliumallozucq July 21, 1925. 1,547,030

A. c. CASTILLO TIMER FOR FORDS AND FORDSON TRACTORS Filed Feb. 8, 1922 2 Sheets -Sheet 2 flaamzzo.

Patented July 21, 1825.

UNITED STATES $47,030 PATENT OFFlC iii ALFONZO C. CASTILLO, OF SOCORRD, NEW MEXICO, ASSLEGNOR TO M- C. SPICEB, OF N FRANCISCO, CALIFORNIA.

, TIMER FOR FORDS AND FORDSON' TRACTORS.

Application filed February 8, 1922. Serial No. 534,896.

To all whom it may concern:

Be it known that I, ALFONZO C. CASTILLO,

a citizen of the United States, residing at Socorro, in the county of Socorro and State of New Mexico, have invented certain new and useful Improvements in Timers for Fords and Fordson Tractors, of which the following is a specification.

This invention relates to an improvement 19 in timers for the ignition system of internal combustion engines, particularly of the Ford type-and is designed to provide a construction as a substitute for the present rotary contact arrangement.

It is a principalobject of my invention to provide a timing mechanism which may be readily attached to any Ford or Fordson tractor engine, which will be positive in action, simple in construction and easily as repaired.

It is a further object of my invention to provide a timing mechanism which is mounted on the engine body in proximity to the valve stemsand is so associated with the exhaust valve stems as to be operated and controlled thereby. It is a further feature of my invention to provide a timer so constructed that frictional or rolling on gagen'ient between the contacts is avoided.

In the accompanying drawings forming a part of this specification,

Figure 1 is a side elevation of a Ford type of engine with my timing mechanism installed therein;

Figure 2 is a detail vertical sectional view 011 the line 22 of Figure 1;

Figure 3 is a detail vertical sectional view on the line 33 of Figure 1;

Figure at is a side perspective view of one of the contact carrying arms, and

Figures 5, 6 and 7 illustrate details of construction.

Referring now more specifically to the drawings by numerals of reference, in

which the characters designate like parts thruout the several figures, an engine of the Ford type is indicated generally at 2, a coil box at i. and the wiring of the ignition sys tem generally at 6.

Referring particularly to Figure 1, I have shown the right hand side of a Ford motor with the valve case covers removed, and illustrating the valve arrangement, which includes intake valve stems A, B, G n and D and exhaust valve stems E, F, G and H operated thru push rods 8 from cams on cam shaft 10.

The timing mechanism includes a metallic rocker arm 12 (duplicated in each valve case 14;) pivoted intermediate its ends thru an opening 16 on a shaft 18 threaded at 19 into the wall 20 of the cylinder, the said shaft being rigidly secured against displacement by a nut 21 and lock washer 22. The rocker arm 12 is free to oscillate on the shaft 13 but is held against lateral movement in either direction thru nuts 23 threaded on the latter. At either end, the rocker arm is cut away at 24; to provide a clearance recess for purposes to be described later.

On the outer face of said rocker arm 12 and in vertical alinement with its respective exhaust valve stem, is a rigid horizontal threaded stud 25, carrying a soft steel contact finger 26 which is insulated from the stud 25 thru an insulating bushing sleeve 28. The eye 29 of a conductor 30 passes around the sleeve 28 and is maintained in electrical contact with the contact finger 26 by a nut 32 threaded on the stud 25, an insulating washer 33 being interposed between the inner face of said nut and the metallic eye of the conductor. The lower end of the finger 26 is preferably curved outwardly as at 3 1- and is adapted to periodically make and break the circuit thru the secondary of the ignition system thru its engagement and disengagement with a co-operating contact linger 36 mounted upon the valve stem intermediate the valve spring pin 38 and the valve spring washer 39, the finger 36 at its rear portion being apertured to permit passage of the valve stem therethru. The contacting end 40 of the finger 36 is slightly below the plane of the rear portion to provide the necessary clearance and to permit the proper point in the cycle of the engine being attained before the circuit is completed to ignite the charge of the explosive mixture in the cylinder which it controls, it being understood that the finger 36 movesin unison with the valve stem with which it is associated.

The order in which the cylinders fire is as follows: two, four, one, three.

Referring to Figure 1 by way of an example in which my timer operates, it will be assumed that exhaust valve stem F is elevated, bringing end 40 of contact finger 36 into electrical contact with finger 26. The

electric circuit of the ignition system is now closed thru the secondary which includes wires U, coil posts V and W, wire X, spark plug Y of cylinder number t and to. ground. During the engagement of the contact fingers 26 and 36, the rocker arm 12 is permitted to oscillate to a slight degree.

It will be understood that the contacts, controlling the circuits to the various cyl inders are made and broken in proper sequence.

While 1 have particularly described the elements best adapted to perform the functions set forth, it is obvious that various changes in form, proportion and in the minor details of construction may be resorted to, within the scope of the appended claims, without departing from the spirit or sacrificing any of the principles of the inventionl Having thus described the construction and operation of my invention, what I claim as new and desire to protect by Letters Patent is:

1. In a timing mechanism for gas engines, the combination with the engine body and the exhaust valve stems therefor, contacts carried by said valve stems; of a rocker arm supported on said engine body and adapted for oscillatory movement thereon,

contacts carried by said arm and connected with the secondary of an ignition system, said last mentioned contacts extending through apertures provided in said rocker arm, the contacts on said rocker arm engaging the contacts on said valve stems periodically to make and break the circuit of the secondary of said ignition system.

2. In a timing mechanism for gas engines, the combination with the engine body and the exhaust valve stems therefor, of a rocker arm supported on said engine body and adapted for oscillatory movement thereon, said arm operating in a vertical plane substantially parallel to the vertical plane passing through said valve stems and spaced outwardly therefrom, a contact extending laterally adjacent each end of said arm, a second contact carried by each of said valve stems and extending laterally therefrom, said second contacts being disposed below said first mentioned contacts, and adapted for engagement therewith periodically to make and break the circuit of the secondary of the ignition system electrically connected to the contacts on said arm.

ture.

ALFONZO C. CASTILLO.

In testimony whereof I aflix my signa-

Images