US1289135A - Ignition device. - Google Patents

Description

J. M. EDWARDS.

IGNH'ION DEVICE.

APPLICATION FILED JAN.29. 1917.

Patented Dec. 31, 1918.

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J. M. EDWARDS.

IGNITION DEVICE.

APPLICATION FILED maze. 1911.

1,289, 1 3 5., Patented Dec. 31, 1918.

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JAMES 1311. BET/YARDS, OF HATEELOO, IOWA, ASSIGNOR TO ASSOCIATED MANUFAC- QUBEZtS COMPANY, OF WATERLOO, IOWA, A CORPORATION OF IOWA.

IGNITION DEVICE.

Specification of Letters Patent.

Patented Dec. 31, 1918.

To alt whom it may concern: 1

Be it known that T, JAMES M. Enwanns, a citizen of the United States, residing at Cedar Heights, i-Vaterloo, in the county of Blackhawk and State of Iowa, have invented certain new and useful Improvements in Ignition Devices, of which the following is a specification.

My invention relates to ignition devices, and has for one of its objects the provision of a simple and eflicient ignition producing device for internal combustion engines, and the like. A further object being the provision of'such a device which is capable of being quickly and easily adjusted into and out of operative position on the internal cdmbustion engine as a single unit, and one which can be easily and quickly taken apart for repairs, or when desirable. Other objects will appear hereinafter.

An embodiment of my invention is shown in the accompanying rawings, forming a part of this specification, and in which Figure 1 is a side elevation of an ignition device embodying my invention shown as applied to a portion of a cylinder wall of an internal combustion engine.

Fig. 2 is a view looking at the portion of the device which extends into the cylinder of an internal combustion engine, a fragment of the internal combustion engine being shown.

Figs. 3 and 4c are sections taken on line 33 and t e respectively of Fig. 1; and

Fig. 5 is a fragmental section taken on line 5-5 of F ig. 1.

Referring more particularly to the drawings, T have shown a frame 10 of substan tialiy inverted U-shape with a portion 11, which extends into the cylinder 12 of the in ternal combustion engine, and a shelf 13, upon which a magneto 1% is mounted. The frame 10 is preferably formed hollowed or U-shapcd in order to provide an opening between portions thereof for mounting the operating mechanism of the device. This frame 10 is preferably formed with an opening 15; in its upper part in order to provide access to part of the operating mechanism, and to make it easy to adjust the magneto 14 into and out of position in the device. A further reason for providing the opening 1 5. is that it affords a passage for the electrical connection between the magneto and one of the electrodes of the sparking device.

The portion 11 of the frame has a perforation therein, in which is mounted the fixed electrode 16, the latter being insulated from the part 11 by means of insulation material 17, as clearly indicated in Fig. 1. The part 11 is also provided with a perforation forming a bearing for a shaft 18, which carries the movable electrode 19. The shaft 18 is not insulated from the frame, butarranged to makeelectrical contact therewith.- The shaft 18 has one of its ends journaled, as at 20, in a portion of the frame so that both of its ends are mounted in bearings and providing space between such bearings for the operating mechanism mounted thereon. This arrangement prevents twisting of the shaft in its bearings and gives longer life to the device.

The shaft 18 has its sides flattened, as at 21, for a short distance, and an arm 22 mounted on the shaft on said flattened portions 21. The arm 22 has a portion thereof bifurcater'l, ])1'()Vl(lll l,g parts 23 and .l which are clamped on the flattened portions 21 of the shaft by means of a screw 25. The portion 24: of the arm is provided with a recess 26, in which one end of a spring 27 is mounted. The other end of spring 27 is mounted in the bore of a lug 28 formed on the frame 10. The lug 28 is neferably threaded in its bore, and a plug 29 screw-threaded therein so that the spring 27 may be easily removed, when so desired, or may be adjusted to different compressions. It will be apparent that the spring 27 holds the movable electrode 19 in engagement with the fixed electrode 16 normally.

The magneto 14 is shown as a conventional magneto and has an oscillatory rotor therein; the internal parts of the magneto are not shown,- since they are well known in the art. The rotor isof conventional construction and mounted on a shaft 30 which extends through the opening 15 into the space between the leg portions of the frame 10, as clearly indicated in. Figs. 1 and 4. On the end of shaft 30 is an arm 31 which is adapted to operate the rotor of the magneto. The arm 31 is keyed, as at 32. or otherwise secured to the shaft.

Jonrnaled on the shaft 18 is an arm 33,

and this arm is connected by a connecting a link 34 to the arm 31 on the rotor shaft, so

that the arm 33 will move with the arm 31and' rotor shaft 30 in both of its directions of oscillation. The arm 33 is provided with a hub which extends over a considerable portion of the shaft 18 between the leg portions of the frame 10, so that the arm will have as much bearing surface as possible on the shafts 18 to reduce wear to a minimum, and to render the device of sturdy construction. On the shaft 18, adjacent the bearing 20, is a collar 36, having a hub 37 extending toward the hub 35 of arm 33, sothat the hubs 35 and 37 substantially cover the entire portion of the shaft between arm 3 3 and collar 36. A coil spring 38 is coiled about the hubs 35 and 37 with one of its ends secured to the collar 36, and its other end secured to a lug 39 on the hub of arm 33. The spring 38 tends to move the arm 33 in the opposite direction to that which the spring 27 moves the arm 22. The spring 38, however, is of such size and arranged in such a manner that it exerts less force than the spring 27, sothat the spring 27 normally maintains the electrodes in contact. It will be noted that the collar 36 is rigidly secured to-the shaft 18, such as by a pin 40, shown in Fig. 1.

The arm 33 is provided with a shoulder 41 which extends laterally of the arm into the path of the movement of arm 22. An adjustable connection is provided between arm and shoulder 41, which in the present instance, comprises a screw 42 threaded in the arm 22 and engaging the shoulder i1. A lock nut 43 is provided on the screw to hold the latter in its different positions of adjustment so that the relative positions of arms 22 and 33 may be varied, when so desired, to change the relation of the sparking of the electrodes with the rotation of the engine.

The arm 33 is provided with a trip finger H which extends downwardly into the path of a reciprocatory member the latter being driven by the internal combustion engine; the connection between the member 45 and the engine not being shown, since its connection is obvious. The member 45 is pivotally mounted on a bar 4:6, and has a portion engaging a shoulder -t7 on the bar t6, so that when the bar 46 moves in the direction of the arrow 48, the member +5 moves the trip finger 4:4 to bring the rotor to cocking position. When the member 45 passes under the trip finger, the spring 38 moves the rotor through its operative stroke to produce anelectrical current. The member 45 is pivoted to the bar 46, so that upon -its movement in the: opposite direction to that indicated by arrow 48, it will move on its pivotal point and slide under the trip finger 44 into position for the next operation' of the ignition device. The means". shown for operating the trip finger may be changed in any desired manner.

The fixed electrode is connected by means of a connection 49 with the magneto 14 to form'one side of the electrical circuit. The other side of the electrical circuit passes from the frame of the magneto through the frame 10, shaft 18, and movable electrode 19 to the fixed electrode 16. In the operation of the device, the trip finger is moved to bring the rotor to cocking position,. and when the trip finger is'released, the spring 38 moves the arm 33, rotor, and parts connected between said arm and rotor, to cause a. current to be formed in the magneto 14. The strength of spring 38, together with the momentum of arm 33, the rotor of the magneto, and the parts connected between said arm and rotor overcomes the strength of spring 27 and momentarily separates the electrodes 19 and 16. This separation of the electrodes is timed so that it occurs when the maximum current is produced in the' magneto 14. Since the spring 27 exerts normally more force on the connection between the movable electrode and magneto than the spring 38, as soon as the momentum of the parts operated directly upon by the spring 38 has been overcome, said spring 27 will again close the electrodes and bring the rotor of the magneto again to its normal position ready for the next operation of the device.

I have provided a simple means for rendering the ignition device inoperative, thereby providing a simple means for stopping the internal combustion engine to which the device is applied. This device consists of a lever 50, pivoted as at 51, to a projection 52 on a movable portion of the frame 10, see Figs. 1 and 4. The lever 50 is provided with an arm 53 having a notch adapted to engage an arm 54 mounted on shaft 30, or formed integrally with arm 31, see Figs. 1 and 4. The arrangement of this part of the device is such that when the internal combustion engine is running, the lever 50 with its arm 53 is moved to its dotted line position shown in Fig. 4, whereupon the notch portion of arm 53 catches the arm 54:, and prevents the rotor from passing through its part of movement, forming the current in the mag i in raeaiee the preferred form of my invention, I do not desire to be limited to the precise details set forth, but desire to avail myself of such variations and changes as come within the scope of the appended claims.

I claim 2-- 1. In combination, a field magnet; a rotor mounted in the field magnet; a fixed electrode; a movable electrode; an operative connection between the rotor and movable electrode; a spring operating on said connection and normally holding the electrodes together; and a spring operating on said connection with relatively less force than the first-mentioned spring and tending to separate the electrodes.

2. In combination, a field magnet; a rotor mounted for oscillation therein; a fixed electrode; a shaft; a movable electrode fixed on said shaft; an arm pivoted on said shaft and connected to move with the rotor; an arm fixed on said shaft and having an operative connection with the arm pivoted on said shaft; a spring operating on the arm fixed on said shaft normally holding the electrodes together; and a spring operating on the arm pivoted on said shaft and tending to separate the electrodes.

3. In combination, a field magnet; a rotor mounted for oscillation therein; a fixed electrode; a movable electrode; an arm on the movable electrode; a spring normally holding the electrodes together; an arm connected with the rotor; and a spring normally pressing the second-mentioned arm againstthe first-mentioned arm and exertingforce on the movable electrode tending to separate the electrodes, the second-mentioned spring normally exerting relatively less force on the movable electrode than the firstmentioned spring.

i. In combination, a frame; a field magnet mounted on the frame; a rotor mounted the field magnet; a fixed electrode mounted on the frame; a shaft journaled in the frame; a movable electrode fixed on the shaft; a spring having one end connected to said frame and its other end connected with said shaft operatingon the latter to hold the electrodes together; an arm fixed on the shaft; an arm journaled on the shaft and connected with the rotor to move therewith;

' and a spring operating on the second-mentioned arm normally holding the latter against the first-mentioned arm for holding the rotor in normal position.

-5. In combination, a frame having two spaced portions: a shaft extending between and journaled in both of said portions of the frame; a field magnet on the frame; a rotor mounted in the field ,magnet; a fixed electrode mounted in the frame; a movable electrode fixed on the shaft; an arm fixed on the shaft between said portions of the frame; an arm jonrnaled on the shaft between said portions of the frame and connected with the rotor; a spring connected between the frame and the arm fixed on said shaft normally holding the electrodes together; and a spring connected to the arm journaled on the shaft and adapted to hold the last-mentioned arm against the firstmentioned arm for holding the rotor in normal position.

6. In combination, an inverted U-shaped frame; an integral part on one leg portion of the frame adapted to extend into the combustion space of an internal combustion engine; an integral shelf on the other leg portion of the frame; a shaft extending between and journaled in the leg portions of the frame; a fixed electrode mounted in the frame; a movable electrode fixed on said shaft; a magneto on the shelf having a rotor shaft extending into the space between the leg portions of the frame; an operative con-Q nection between the rotor shaft and said first-mentioned shaft disposed. between the leg portions of said frame; a spring oper' ated on a part of said connection normally holding the electrodes together; and a spring of relatively less tension than thefirst-mentioned spring operating upon said connection and holding the rotor. shaft in normal position.

7. In combination, a field magnet; a rotor mounted in the field-magnet; a fixed electrode; a movable electrode; an operative connection between the rotor and movable electrode; a spring operating on said connection normally holding the electrodes together, means for varying the effective strength of said spring; and a spring operating on said connection with relatively less forcethan the first-mentioned springtending to separate the electrodes.

8. In combination, a current generator including an oscillatory rotor adapted to produce an electrical currentduring one direction of its travel; engine-operated means connected with the rotor for moving the lat ter to the beginning of its current-producing movement; means for quickly moving the rotor through its current-producing move ment; and means for arresting the action of said "first-mentioned means on the rotor at the beginning of the current producing movement of the latter.

9. In combination, a current generator including a rotor; an engine-driven means for moving the rotor to cooking position; a

spring adapted to -m0ve the rotor from cocking position through its effective current-producing movement; an arm on .the

11. In combination, a frame; a fixed electrode; a shaft journaled in the frame; a movable electrode carried on the shaft; an arm fixed on the shaft; an extension on said arm; a perforated lug on the frame; a spring in the perforation of said lug and engaging said extension; a plug adjustably. threaded in the lug and adapted to vary the effective force of the spring; an arm journaled on said shaft; and a spring connected with the shaft and the last-mentioned arm holding the latter normally against the first-mentioned arm.

12. In combination, a frame having its central portion made up of two substan-' tially evenly spaced inverted U-shaped parts joined together at their ends; asupporting lug on one end of the frame; a shelf at the other end of the frame; a magneto on said shelf; a fixed electrode. mounted in and insu lated from said frame; a conductor connecting the fixed electrode with the magneto and having a portion thereof extending between the U-shaped parts of the frame; a movable electrode journaled on the frame; and an operable connection between the magneto and movable electrode.

In testimony whereof I have signed my name to this specification on this th day of January, A. D. 1917.

JAMES M. EDWARDS.

Witnesses:

H. B. PLUMB, JAS. M. HUBBARD, A. M. MEADER.

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