US1380797A - Ignition device for internal-combustion engines - Google Patents

Description

W. GRUNOW.

IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED .IULY 21,1919.

1,38%791, Pamnted June 7, 1921 3 SHEETSSHEET I.

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APPLICATION FILED JULY 21.1919.

1 380 79? Patentedlhne 7,1921.

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W. GRUNOW.

IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 21, I919.

gg 'yg Patented June 7, 1921 3 SHEETS-SHEET 3- UNHTE sure am r151.

WILLIAM GRUNOW, OF NEWARK, NEW JERSEY, ASSIGNOR TO SPLITDORF ELECTRI- CAL COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

IGNITION DEVICE FOR INTERNAL-COMBUSTION ENGINES.

manner.

Specification of Letters Patent.

Patented June Z, 1921.

Application filed July 21, 1919. Serial No. 312,172.

. New Jersey, have invented certain new and useful Improvements in Ignition Devices for Internal-Combustion Engines, of which the following is a description, reference being had to the accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in ignition devices, and more particularly to an ignition device having a fixed and a movable electrode to which ourrent is supplied by a magneto generator.

An object of the invention is to provide an ignition device of the above character which includes an operating sleeve mounted on the movable electrode as a bearing, which sleeve is provided with an arm adapted to oscillate the armature and to actuate the movable electrode to separate the electrodes in proper timing with the maximum current generation.

A further object of the invention is to provide an ignition device of the above character having a spring encircling the sleeve on the movable electrode, which spring performs the double function of holding the electrodes closed and moving the arm for actuating the armature and the movable electrode- A still further object of the invention is to provide an ignition device of the above character wherein said sleeve is provided with an arm adapted to cooperate with a buffer spring serving as an abutment for the main actuating spring so as to keep the electrodes and wherein said arm is extended so that the sleeve may be actuated by hand for producing a spark.

Another object of the invention is to provide an ignition device having a fixed and a movable electrode and a magneto generator with a supporting means therefor, including a bracket on which the electrodes are mounted, also the actuating mechanism and bufier spring, and a second bracket on which the generator alone is mounted.

Still another object of the invention -is to provide a device of the above character wherein the brackets are rovided with cooperating devices for positioning one bracket relative tothe other, and common means is provided for securing the two brackets to the engine cylinder.

These and other objects will in part be obvlous and will in part be hereinafter more fully disclosed.

In the drawings, which show by way of illustration one embodiment of the invenion Figure 1 is a view, partly in side elevation and partly in section, showing an ignition dev ce embodying the invention;

Fig. 2 is a view, partly in plan and partly in section, of the same;

Fig. 3 is a view, partly in front elevation and partly in section, with the generator removed; and

Fig. 4 is a detail showing the connection between the actuating arm and the fork on the armature of the magneto generator.

In my prior application, Serial No. 288,- 152, filed April 7, 1919, I have shown and described an ignition device for internal combustion engines consisting of a fixed and a movable electrode, and a magneto generator for supplying current therefor, wherein the electrodes are mounted on one bracket and the magneto generator is mounted on another bracket, and these brackets are so constructed that, when placed together or assembled on the engine, they will be held in pre-determined relation to each other.

The present invention is directed to an improvement in the arrangement of the actuating mechanism and the bracket parts shown in said application, and particularly to the mounting of the actuating device for the electrodes and the armature of the magneto generator. The bracket carrying the electrodes has an inwardly projecting hearing which supports the movable electrode and said movable electrode projects beyond the outer face of the bracket, and freely mounted thereon as a bearing is a sleeve. This sleeve is provided with a depending arm which carries a pin on which is mounted a sleeve, square in cross section, adapted to engage the forked end of an arm carried by the armature of the magneto generator so that the arm of the armature will be moved in synchronism with the movements of the sleeve on the electrode. Surrounding said sleeve is a main spring in which power is stored for actuating the armature. This spring is connected at one end to the movable electrode, and the other end of the spring is connected on the arm on the sleeve and said arm is adapted to bear against a buffer spring which is of greater tension than the tension of the main spring when the parts are normally at rest so that the main spring will hold the electrodes closed. 0n said sleeve is a trip arm which is adapted to be engaged by a push rod of the usual construction and which operates to'put said main spring under greater tension for storing power therein, and said push rod releases said sleeve at a pre-determined point in the stroke of the piston of the engine so that the return of the sleeve through the influence of the spring will operate the armature, com ress the buffer spring, and also operate the movable electrode.

Referring more in detail to the drawings, the invention is embodied in an ignition device which includes a magneto generator, indicated at G, a fixed electrode, indicated at 1, and a movable electrode, indicated at 2.

These electrodes are provided with the usual contact points. The electrodes are mounted in a bracket, indicated at 3 in the drawings. The magneto generator is mounted on a bracket, indicated at 4. in the drawings. The bracket 3 is provided with an inwardly projecting portion 5. The movable electrode is carried by a shaft 16 which is journaled in said bracket 3 and the projecting portion 5 thereof. The projecting portion forms a durable support for the shaft 6 carrying the electrode 2. Said shaft 6 extends to some distance in front of the bracket 3.

On the extreme outer end of the shaft is a collar"7 carrying anarm 8. Said collar is fixed to the shaft by means of a pin 9 which passes throu h the collar and through the end of the sTraft. Freely mounted on the shaft 6 and between the collar 7 thereon and the bracket 3 is a sleeve 10. Encircling said sleeve 10 is a main actuating spring 11. The end 12 of the main actuating sleeve is secured to the arm 8 which is fixed to the shaft 6 carrying the movable electrode. Projecting outwardly from the sleeve 10 is an arm 13. The other end of the spring, indicated at 14, extends underneath the arm 13. This spring is normally of sufficient tension so as to operate against the arm 13 as an abutment and hold the movable electrode in contact with the fixed electrode.

- Secured to the bracket 3 is a sleeve 16 in which is mounted a buffer spring 17 operating against a plunger 17 serving as an abutment for the arm 13. The position of the plunger 17* may be varied by means of a nut 18. This spring 16 is normally of greater tension than the main spring when the parts are at rest and in the position shown in the drawings and, therefore, the main spring will operate against the bilifer spring as an abutment and hold the electrode closed.

Extending outwardly from the sleeve. 10 is an arm 19. This arm 19 is formed with a projection 20 having a shoulder 21 adapted to be engaged by a trip rod 22. The trip rod 22 is carried by a sliding bar 23 which is of the usual type. This trip rod 22 engages the shoulder and moves the sleeve so as to put the main spring under greater tension or store power therein. Said projection 20 overhangs the shoulder 21 and serves as a means for positively forcing the trip rod out of engagement with the shoulder so as to release the sleeve and permit the spring to actuate the same. Such mode of operation is very common in this type of ignition generator, and further description thereof is not thought necessary.

Projecting laterally from the arm 19 is a pin 24 on which is mounted a sleeve 25 which is rectangular in cross section. Mounted on the armature shaft 26 is a collar 27 which carries a depending arm 28 terminating in a forked end 29. The distance between the arms of the fork is practically the same as the diameter of the square sleeve so that said sleeve fits snugly between the arms of the fork and all lost motion is avoided:

The magneto generator, as above noted, is mounted on a bracket 4. This bracket 4 consists of a base section 30 having an outwardly projecting shelf 30' which forms a support for the magneto generator. Extending upwardly from this base section 30 is a section 31. Said section 31 is formed with openings which are adapted to register with openings in the bracket 3 so that bolts- 34 may be passed through said registering openings and into the engine cylinder for securing the two brackets to the engine. The bracket 4 is formed with lugs 35, 36 and 37 which are bent so as to overlap the bracket 3, see Figs. 1 and 2. These lugs engage the bracket 3 on three sides thereof and serve as a means for positioning the two bracket sections relative to each other. If,,therefore, the bolt holes in the bracket 4 wear so that there is more or less looseness between the bolts and the brackets, the bracket 4 will not lose its proper relation to the bracket 3 but will be held firmly in pre-determined relation thereto by these with the other bracket in bringing about a pre-determined positioning of the two brackets relativ to each other.

The overhanging section 31 extends. about i the fixed electrode 1, the'shaft 6, and 'the actuating parts carried thereby. The fixed:

electrode 1 xtends to the. fron of the bracket 3 and is formed with a terminal connection 38 to which a wire 39 leading from the electrode is connected.

From the above, itwill be noted that all the actuating mechanism for the movable electrodes and also for the armature of the generator are carried by the bracket 3, so that if the bracket 4 be broken or is removed or the generator is removed, there is still left a complete self-contained actuating mechanism for the movable electrode so that battery ignition may be used in connection therewith.

It is obvious that min-or changes in the details of construction and the arrangement of parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention,what I claim as new and desire to secure by Letters-Iatent is 1. In an ignition device, a fixed and a movable electrode, a magneto generator having a current generating member, a shaft carrying the movable electrode a sleeve freely journaled on said shaft, a spring encircling said shaft and connected at one end to said sleeve, an arm on the end of the shaft to which the other end of said spring is connected, means whereby said sleeve may be turned and released for actuation by the spring, and means carried by the sleeve for engaging the arm on said shaft and actuating the current generating member.

2. In an ignition device, a fixed and a movable electrode, a magneto generator having a current generating member, a shaft carrying the movable electrode, a sleeve freely journaled on said shaft, a spring encircling said shaft and connected at one end to said sleeve, an arm on the end of the shaft to which the other end of said spring is connected, means whereby said sleeve may be turned and released for actuation by the spring, an arm carried by said sleeve, and a pin projecting from said armand adapted 'to actuate the current generating member and engage the arm on the shaft for separating the electrodes.

3. In an ignition device, a fixed and a movable electrode, a magneto generator having a current generating member, a shaft carrying the movable electrode, a sleeve freely journaled on said shaft, a spring encircling said shaft and connected at one end to said sleeve, an arm on the end of the shaft to which the other end of said spring is connected. mea-nswhereby said sleeve may be turned and released for actuation by the spring, an arm carried by said sleeve, and a pin projecting from said arm and adapted to actuate the current generating member andengage the arm on the shaft for separating the electrodes, said pin having a square sleeve thereon engaging a forked arm carried by the current generating member.

4. In an ignition device, a fixed and a movable electrode, a magneto generator having a current generating member, a shaft carrying said movable electrode, a sleeve freely ournaled on said shaft, a spring surrounding said sleeve, an arm projecting from said sleeve to which one end of said spring is connected, an arm on the shaft to which the other end of the spring is connected, a buffer spring normally of greater tension than the spring surrounding the sleeve and adapted to serve as an abutment for the arm on said sleeve whereby said spring normally holds the electrodes in engagement, and means whereby said sleeve actuates the current generating member and engages the arm on the shaft for separating the electrodes when said sleeve is actuated by said spring surrounding the same.

5. In an ignition device, a fixed and a movable electrode, a magneto generator having a current generating member, a shaft carrying said movable electrode, a sleeve freely journaled on said shaft, a spring surrounding said sleeve, an arm projecting from said sleeve to which one end of said spring is connected, an arm on the shaft to which the other end of the spring is connected, a buffer spring normally of greater tension than the spring surrounding the sleeve and adapted to serve as an abutment for the arm on said sleeve whereby said spring normally holds the electrodes in engagement, and means whereby said sleeve actuates the current generating member and engages the arm on the shaft for separating the electrodes when said sleeve is actuated by said spring surrounding the same, said arm cooperating with the buffer spring being extended to form a hand lever for moving and releasing the sleeve to produce a spark.

6. In an ignition device, a fixed and a movable electrode, a bracket having a projection extending inwardly therefrom and supporting said electrodes, a shaft journaled in said bracket and projecting and carrying the movable electrode, said shaft projecting beyond the bracket and having'an arm at the outer end thereof, a sleeve freely journaled on said shaft, a. spring surrounding said sleeve and connected at one end to said sleeve, the other end of said spring being connected to said arm, a magneto'generator having a current generating member, an arm carried thereby, an arm carried by the sleeve and having a projecting pin adapted to engage the arm of the current generating member for actuating the same and adapted to engage the arm on the shaft for separating the electrodes.

7 In an ignition device, a fixed and movable electrode, a bracket having a projection extending inwardly therefrom and supporting said electrodes, a shaft journaled in said bracket and projection and carrying the movable electrode, said shaft projecting beyond the bracket and having an arm at the outer end thereof, a sleeve freely journaled on said shaft, a spring surrounding sai-d sleeve and connected at one end to said sleeve, the other end of said spring being connectedto said arm, amagneto generatorhaving a current generating member, an arm carried thereby, an arm carried by the sleeve and having a projecting pin adapted to engage the arm of the current generating member for actuating the same and adapted to engage'the arm on the shaft for separating the electrodes, a buffer spring mounted on said bracket and adapted to engage the arm on the sleeve, said bufier spring being normally of greater tension than the spring surrounding the sleeve.

8. In an ignition device, a fixed and a movable electrode, a bracket having a projection extending inwardly therefrom and supportin said electrodes, a shaft journaled in sai bracket and projection and carrying the movable electrode, said shaft projecting beyond the bracket and having an arm at the outer end thereof, a sleeve freely journaled on said shaft, a spring surrounding said sleeve and connected at one end to sa d sleeve, the other end of saidspring being connected to said arm, a magneto generator having a current generating member, an arm carried thereby, an arm carried by the sleeve and I having a projecting pin adapted to engage the arm of the current generating member for actuating the same and adapted to engage the arm on the shaft for separating the electrodes, a buffer spring mounted on said bracket and adapted to engage the arm on the sleeve, said buffer spring being normally of greater tension than the spring surrounding the sleeve, said arm engaging the buffer spring being extended whereby the same may be moved and released by hand for generating a spark.

9. In an ignition device, a bracket adapted to be attached to the engine cylinder, a movable and a fixed electrode carried thereby, a magneto generator having a current generating member, a second bracket supporting said magneto generator and adapted to be secured against the first-named bracket, and means carried by one of said brackets projecting toward and overlapping the other bracket for positioning the brackets relative to each other.

movable and a fixed electrode carried there-.

by, a magneto generator having a current generating member, a second bracket supporting said magneto generator and adapted to be secured against the first-named bracket, and means carried by one of said brackets projecting toward and overlapping the other bracket for positioning the brackets relative to each other, said bracket carrying the generator being extended about and free from connection with the projecting electrodes.

11. In an ignition device, a bracket adapted to be attached to the engine cylinder, a movable and a fixed electrode carried thereby, a magneto generator having a current generating member, a secondbracket supporting said magneto generator and adapted to be se ured against the first-named bracket, said bracket for said generator having inwardly projecting members adapted to engage the side edges of the bracket carrying the electrodes for positioning one bracket relative to the other.

12. In an ignition device, a fixed and a movable electrode, a bracket adapted to be attached to the engine, a shaft carrying the movable electrode, a bearing carried by said bracket for said shaft, said shaft projecting forwardly from sai-d bracket, a sleeve surrounding said shaft, 'an arm on the. outer end of the shaft, a spring surrounding the sleeve and connected at one end to said sleeve and at the other end to said arm, an arm extending from said sleeve, a bufler spring carried by said bracket and adapted to engage said arm, a second arm projecting from said sleeve and having a pin adapted to engage the arm on the shaft when said sleeve is actuated by the spring, a magneto generator having a current enerating member, a bracket carrying sald magneto generator and adapted to engage the first-named bracket and be secured to theengine by the securing means for said first-named bracket,

an arm carried by the current generating member adapted to be engaged by said pin whereby the current generating member is turned in synchronism with said sleeve, and means independent of the securing means for positioning the brackets relative to each other.

In testimony whereof I afiix my signature.

WILLIAM GRUNOW.

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