US1400581A - Automatic impulse starting apparatus - Google Patents

Description

H. TIEDEMANN.

AUTOMATIC IMPULSE STARTING APPARATUS.

APPLICATION FILED JAN 22, I919.

1,400,581. Patented 20, 1921.

4 SHEETSSHEET l.

' m VENTOR fit'NRY T/EDEMHNN ,4 TTORNE Y H. TIEDEMANN.

AUTOMATIC IMPULSE STARTING APPARATUS. APPLICATION ,HYLED JAN. 22, 1919.

1,400,581. Patented Dec. 20, 1921.

4 SHEETSSHEET 2.

IN VE N TUR HENRY T/EDEMHNN A TTORNEY H. TIEDEMANN.

AUTOMATIC IMPULSE STARTING APPARATUS.

APPLICATION FILED JAN-22.19I9.

1,400,581, Patented Dec. 20, 1921.

4 SHEE"SSHEET 3.

m/ VL'A/ 70/? HEN KY T/EDEMHNN A TTOR/VEY H. TIEDEM ANN.

AUTOMATIC IMPULSE STARTING APPARATUS.

APPLICATION FILED JAN. 22. 1919.

1,400,581, Patentd Dec. 20, 1921.

4 SHEETS-SHEET 4.

I INVENTDR HENRY WEDEMHNN ATTORNEY UNITED STATES PATENT OFFICE.

' HENRY TIEDEMANN, OF NEW JERSEY, ASSIGNOR T0 SPLITDORF ELEC- TRICAL COMPANY, OF NEWARK, NEW JERSEY.

AUTOMATIC IMPULSE STARTING APPARATUS.

Specification of Letters Patent. Patented Dec, 20 1921 Application filed January 22, 1919. Serial No. 272,529.

is the time for firing the engine. This low rotative speed is detrimental to getting a good spark from an ignition generator of the magneto type.

- It is the object of my invention toprovide means for accelerating the rotative element of the generator not only at the time of the initial starting of the engine but at all speeds below a predetermined value.

Another object of my invention is to pro vide a simple and cheap inclosing means for the impulse devices used in connection with my invention, so that they will not be exposed to dust, dirt, water and other objec, tionable matter tending to interfere with the operation.

Another object of my invention is to pro vide easy means for removing the impulse device from the rotative element of the ignition generator.

In the application of my invention to a magneto, I have chosen to illustrate it in connection with a magneto of the Dixie type, such as illustrated in U. S. Letters Patent #1,126,676, issued January 26, 1915, although it will be understood that the invention may be applied to other types of ignition generators.

In the drawings, Figure 1 is a side view of the magneto showing the inclosing end plate,

but with a portion of one of the side covers broken away to show certain details.

Fig. 2 is an end view of Fig.- 1, showing the impulse devices in one position of operation, the cover plate being removed.

Fig. 3 is a view similar to Fig. 2 but with the impulse devices in a different position of operation.

Fig. 4 is a view of the driven member carried by the rotating element of the ignition generator. crating means in position within the driven member.

Fig. 5 is a her, while Fi 6 is a view of the driving member on the hue 6-6 of Fig. 5, without the cover ring shown in Fig. 7.

Fig. 7 is an end view of the cover ring used in connection with the driving member plan view of the driving memshown in Fig. 5.

Fig. 8 is a section on the line 8-8 of ig. 9 is an inside view of the cover plate used in connection with the end plate shown in connection with Figs. 1, 2 and 3.

Fig. 10 is a section on the line 10-10 of Fig. 9, but with the friction material removed.

Fig. 11 is a bottom view of the in Figs. 2 and 3.

Fig. 12 is an end view of an ignition generator similar to that shown in Fig. 1 but with a somewhat different tripping mechapawl shown nism.

.Fig. 13 is a view similar to Fig. 12 but with the apparatus in a difierent position of operation.

Fig. 14 is.a side view of the pawls shown in Figs. 12 and 13, while Fig. 15 is a view of Fig. 14 looking from right to left.

Referring now to the details, wherein like numbers refer to corresponding parts in the various views, 1 is a magneto having a base 2 to which an end plate 3 is adapted to be fastened as by screws 4. A driven member 5 is adapted to be fastened to the shaft of the rotating element as by keyway 6 and other means to be later described. Accelerating means, in the form of a spring, 7, is carried by the member 5. One end of the spring 7 abuts against the stud 8, fastened to the member 5, while the other end abuts against the stud 9 carried by the driving member 10, that is supported on the driven member 5 by means of the riin 11 on the member 5 and the flange 12 on the driving member 10. A bufl'er spring 13 is carried between the studs 8 and 9. The 'driving member 10 is machined so as to have two flanges 14 and 15 with anannular space therebetween. Mounted within this'annular This view also shows the accel- Space, as by the pivot 16, is a member'17 having a nose 18 that is adapted, during. a part of the revolution of the driv'in member 10, to protrude beyond the perlpheral surface thereof. I referably use a cover plate to fit between the flanges 14 and 15, in the shape of a snap ring 19, which is notched out at 20, which notches engage. the pins 21 on the driving member 10 to hold the member 19 in position. This cover plate serves a duel function of excluding dirt, dust, oil and water from the member 17 and also prevents the member from flying beyond the confines of the driving member. While, in the ordinary use of the device, the abutment on the member 17 opposite to the nose 18 thereof will prevent any such outward movement, yet in time this abutment may wear down so that the cover plate 19 has to be relied upon to retain the member 17 within its housing. When the member 19 is assembled on the driving member 10, the ends 22 and 23 take the position illustrated in Fig. that is to say, they leave an opening through which. the nose 18 can protrude. The driving and driven members are held in operative position on the shaft. of the rotating element by the nut 24 in the usual and well known manner. g

The end plate 3 has its side walls extends ing outwardly around the driving and driven member forming a housing therefor, the end of the housing being closed in by a cover 25 held to the end plate by screws passing through the holes 26. The cover 25 is grooved out at 27 and carries within this groove a material 28, such as a good grade of felt that engages the periphery of the driving member thereby closmg the opening into the housing to effectually prevent the entrance of dust, dirt, water and other foreign material. The flange 29 on the cover fits closely within the rim 30 thereby effectually closing the opening into the housin containin the impulse devices.

ounted within the housing of the end plate is a restraining device in the shape of a pawl 31 having a nose 32 adapted to engage notches 33 in the driven member 5. The pawl 31 has cars 34 to which is attached an operating lever 35 adapted to be positioned by resilient member 36. Pawl 31 also has attached thereto a finger 37 that is adapted to be engaged by the nose 18 of member 17.

The operation of my device so far as the driving and driven members are concerned, is similar to that shown and described ,in Patent #1,226,933, issued May 22, 1917, to Fred B. Williams, so it will be only referred to briefly herein. When it is desired to utilize the impulse devices the lever 35 is operated to dropthe pawl 31 so the nose 32 engages one of the notches 33 in the driven member 5. This. re t ains t e mem er 5 from turning and energy is stored in the spring 7 until one of the cams 38 on the driving member 10 engages the surface 39 on the nose 32 of the pawl 31, thereby lifting the nose 32 out of engagement with the notch 33 whereupon the driven member and the rotating element of the generator, to which it is attached, are rapidly turned to their normal position, producing a strong spark in the generator. When the speed of the engine has reached a predetermined value the blows on the nose 32 will throw the pawl to the inoperative position, shown in Fig. 2. What has just been said above, is descriptive of the manual operation of the pawl which is advantageously used when the ignition generator carrying the impulse de-' vices are first installed, at which time it is necessary to time the engine properly with the ignition generator. I

Instead of utilizing the manual control I prefer to use an automatic control which will now be described. In vturnin the engine over slowlythe member 17 durmg a portion of the revolution will take the position shown in Fig. 2 in which the nose 18 will project through the opening provided in the manner heretofore described and the nose 18 will engage the finger 37 thereby trippin .the pawl to the position shown in Fig. 3 aIter which the current impulses will be obtained in the manner previously described.

As the engine speeds up the member 17 which is responsive to centrifugal force. will move about the pivot 16 so that the nose 18 will be withdrawn out of the path of engagement with the finger 37, but if for any reason the speed of the engine falls to a predetermined value the nose 18 will be projected so as to engage the finger 37 and the generator will automatically begin to deliver augmented sparks, due to the accelcrating means. i

In F igs. 12, 13, 14 and 15, I have shown an arrangement in which the impulse and tripping mechanism are-not inclosed, except however, in this open type of construction I prefer to use the inclosure for the member 17 as already described.

From the above description of, the automatic tripping arrangement carried by the driving member, it w1ll be seen that a very rugged and substantial construction is ob tained and which construction is a great improvement over the arrangement shown and described in Hermann, Patent No. 1,318,206, issued October 7, 1919, wherein, due to the nature of the said construction the parts must of necessity be rather frailon account of the limited space Within which they are designed to operate.

Byextendlng the side walls of the end plate 3 outwardly to form a housing around the implse devices, means must be provided to remove the drivi g and d iven member from the rotatin element after the nut 24 has been remove and, I have overcome this difliculty by providing openings in the side walls of the plate 3, which openings are closed by any suitable means, such as plugs 40, which are readily removable so that a tool may be inserted from either or both sides of the generator, in behind the driven member 5 to forceit and the driving member 10 off the shaft of the. rotating element.

In order to facilitate the removal of the nut 24, I prefer to use a short pin 41 which extends to the rear of the driven member 5 so that this can be engaged with the tool either when the .parts are inclosed, as in Fig. 1, or when the open type is used, as in Figs. 12 and 13, whereby the rotating element can be held and the nut 24: removed regardless of whether the threadon the end of the shaft is right or left handed, or whether or not the impulse devices are made for right or left hand rotation.

While I have shown and described a preferred form of my invention, it will be understood by one skilled in the art that numerous changes can be made in the details without departing from the spirit of the invention and the scope of the appended claims.

Having thus described my invention, what I claim is 1. In a device of the class described, the combination with the rotor of a magneto having. a driven member attached thereto, of a drivin member for actuating the same.

. acceleratlng means associated with said driven member and connecting the same to said driving member, devices in proximity to said driven member fpr restraining the same, means for holding said devices in non-restraining position, means carried by said driving member for throwing said devices to restraining position and means for w releasing said devlces to permit the accelerating means to actuate the rotor. 2. In a device of the class described, th

- combination with the rotor of a magneto having a driven member attached thereto, of a driving member for actuating the same, connecting means interposed between said driving and driven members including spring, devices carried on the end plate of the magneto but normally inoperative for restraining the movement of the driven member, means carried by the driving member for automatically tripping on starting or when the rotor speed falls below a' predetermined value said restraining devices into position to restrain the driven member whereby energy is stored in said spring, means operated by the driving member for releasing and throwing-to inoperative position said restraining devices to allow the stored energy in the spring to impart an impulse to the driven member and rotor,

and means for holding the restraining devices in ino erative position until tripped again by sai tripping means.

3. In a device of the class described, the combination with the rotor shaft of an ignition generator and a driving member for actuating the same, connecting means interposed between said rotor shaft and driving member including a spring, devices for restraining the movement of the rotor shaft for compressing and storing power in said spring and means for releasing said restraining devices whereby said spring may propel the rotor shaft momentarily at a greater speed than the driving member, and means carried by the driving member for automatically tripping said restraining devices into operative position when the rotor shaft is turned below a predetermined speed.

4. In a device of the class described, the combination with the rotor shaft of an ignition generator and a driving member for actuating the same, connecting means interposed'between said rotor shaft and driving member'including a spring, devices for restraining the movement of the rotor shaft for compressing and storing power in said spring and means for releasing said restraining devices whereby said spring may propel the rotor shaft momentarily at a greater speed than the driving member, and

.a member so constructed and pivoted on the for compressing and storing power in said spring and means for releasing said restraining devices whereby said spring may propel the rotor shaft momentarily at a greater speed than the driving member, said driving member having two flanges with an annular space therebetween and a member pivotally mounted in said space between theflanges, said member having a nose protruding beyond the periphery of said flanges at a speed below a predetermined value whereby the said nose will engage and trip said restraining devices into operative position.

6. In a device of the class described, the combination with the rotor shaft of an ignition generator and a driving member for actuating the same, connectin means interposed between said rotor sha t and driving member including a spring, devices for restraining the movement of the rotor shaft a housing around sai for compressing and storing power in said spring and means for releasing said restraining devices whereby said spring may propel the rotor shaft momentarily at a greater speed than the driving member, said driving member having two flanges with an annular space therebetween and a member pivotally mounted in said space between the flanges, said member having a nose protruding beyond the'periphery of said flanges at a speed below a predetermined value whereby the said nose will engage and trip said restraining devices into operative position, and a cover for said annular space fitting between said flanges to inclose all of the pivoted member except the nose thereof.

7 In a device of the class described, the combination with the rotor of a magneto having a driven member attached thereto, of a driving member for actuating the same, accelerating means associated with said driven member and connecting the same to said driving member, a pawl pivoted on the framework of the generator for restraining the movement of the rotor shaft for compressing and storing power in said spring, said pawl having means associated therewith for holding it in neutral position and a finger attached thereto extending toward said drivin member, a member responsive to centrifugal force carried by the driving member and having a part adapted to protrude outwardly to engage the finger on said pawl to trip the same for restraining said rotor shaft when the driving member is rotated below a certain speed, and means operated by the driving member for releasing said pawl so that the said spring may impart a sudden movement to the rotor shaft.

8. In a device of the class described, the combination with the rotor of a magneto having a driven member attached thereto, and a driving member for'actuating the same, of accelerating means positioned between said members and adapted to be utilized under predetermined conditions, a pawl pivoted in proximity to the driven member for restraining the same, manually operable means for throwing said pawl in restraining and non-restraining position, automatic means carried by the driving member for throwing the pawl in restraining position and means on the driving member for releasing said pawl from restraining posltion to permit accelerated movement of the rotor by said accelerating means.

9. An ignition generator having arotating element, a driven member rigidly fastened thereto, a driving member supported on the driven member, accelerating means associated with the driving and driven members, an end plate fastened to the generator frame and extending outwardly forming members, a pawl carried by said end plate, means attached to ried by said end plate, means attached to said pawl and extending outside said plate for manually tripping the pawl into engagement with the driven member whereby the same will be held from rotation and energy stored in said accelerating means, means operated by the driving member for releasing the pawl from engagement with the driven member so the accelerating means will act on the driven member and rotating element to rapidly restore them to normal position, and a cover fitting closely over the end plate and carrying means for frictionally engaging the driving member to keep dirt, water, etc., from the operating members inside the end plate.

10. An ignition generator having a rotating element, a driven member rigidly fastened thereto, a driving member supported on the driven member, accelerating means associated with the driving and driven members, an end plate fastened to the generator frame and extending outwardly forming a housing around said members, a pawl carsaid. awl and extending toward the driving mem er for tripping the pawl into engagement with the driven member for setting the accelerating means, means carried by the driving member for automatically engaging the tripping means below a certain speed of rotation of the drivin member, land means operated by the drivlng member for releasing the pawl from engagement with the driven member whereby the accelerating means will drive the driven member and said rotating element rapidly forward for the urpose de'scribedyand a cover fitting close y over the end plate and carrying means for frictionally engaging the driving member to close the opening into tl1e== housing formed by the end plate and cover.

11. An ignition generator having a rotating element, a driven member rigidly fastened thereto, a driving member supported 1 on the driven member, accelerating means associated with the drivin and driven members, an end plate fastened to the generator frame and extendin outwardly forming a housing around said members, means for causing a relative displacement between the driving and driven members and storing energy in the accelerating means, means for releasing the displacing means so the ac celerating means will act on the driven member to rapidly restore it to normal position for the purpose described, and a cover fitting closely over the end of said housing and having means for frictionally engaging the periphery of the driving member to close on the driven member, accelerating means associated with the driving and driven mem bers, an end plate fastened to the generator frame and extendingoutwardly forming a housing around said members, means for causing a relative displacement between the driving and driven members and storing energy in the accelerating means, means for releasing the displacing means so the accelerating means will act on the driven member to rapidly restore it to normal position for the purpose described, a cover for closing the end of the housin and normally closed openings through the sides of the housing for the insertion of a tool to force the drlving and driven members off the rotating element when desired.

13. An ignition generator havin a rotating element, a driven member rigldly fastened thereto, a driving member supported on the driven member, accelerating means associated with the driving and driven members, means for causing a relative displacement between the drivlng and driven members and storin energy in the accelerating means, means or releasing the displacing means so the accelerating means will act on the driven member to rapidly restore it to normal position for the purpose described, and a pin carried, by the driven member adapted to be engaged by a tool to hold the rotating element from turning whereby the retaining nut for holding the driving and driven members on the rotating element may be removed.

14. An ignition generator having a rotating element, a driven member rigldly fastened thereto, a driving member supported on the driven member, accelerating means associating with the driving and driven members, an end plate fastened to the generator frame and extending outwardly forming a housing around said members, a pawl carried by said end plate, means attached to said pawl. and extending outside said plate for manually tripping the pawl into engagement with the driven member and further means attached to said pawl and extending toward the driving member for tripping the pawl into engagement with the driven member for setting the accelerating means, means carried by the driving member for automaticallyengaging the last mentioned tripping means below a certain speed of rotation of the driving member, and means operated by the driving member for releasing the pawl from on agement with the driven member whereby 516 accelerating means will drive the driven member and said rotating element rapidly forward for the purpose described, and a cover fitting closely over the end plate and carrying means to close the opening into the houslng formed by the end plate and cover,

1 5. In a device of theclass described, the combination with the rotor of a magneto having a driven member attached thereto, of a driving member for actuating the same, acceleratlng means associated .with said driven member and connecting the same to said driving member, devices in proximity to said driven member for restraining the same, means for holding said devices in nonrestraining position, means carried by said driving member for throwing said devices to restraining position, means for releasing said devices to permit the accelerating means to act with the rotor, and additional means for limiting the outward movement of the drivin member carried means.-

' 16.. n a device of the class described, the combination with the rotor of a magneto having a driven member attached thereto, of a driving member for actuating the same, acceleratmg means associated with said driven member and connecting the same to said driving member, devices in proximity to said driven member for restraining the same, means for holding said devices in non-restraining position, means carried by said driving member for throwing said devices to restraining position, means for releasingsaid devices to permit the accelerating means to act with the rotor and protective means inclosing the driving member carried means to exclude extraneous matter therefrom and to limit the outwardmovement thereof.

In witness whereof, I aflix my signature.

HENRY TiEDEMANN.

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