US1027056A - Means for advancing or retarding a magneto-shaft relative to a motor-shaft. - Google Patents

Description

A. LBVEDAHL.

MEANS FOR. ADVANGING 0B. RBTARDING A MAGNETO SHAFT RELATIVE TO A MOTOR SHAFT APPLICATION rum) 32m. 2, 1910.

1,027,056. Patented May 21, 1912.

3 BHEBT8-SHEET 1.

A. LBVEDAHL. MEANS FOR ADVANGING 0R RETARDING A MAGNETO SHAFT RELATIVE TO A MOTOR SHAFT.

APPLICATION FILED SEPT 2, 1910.

l.027,056. Patented May 21,1912.

3 SHEETS-SHEET 2.

A. LEVBD-AHL.

MEANS FOR ADVANOING 0R RBTARDING A MAGNETO SHAFT RELATIVE TO A MOTOR SHAFT. APPLIOATION FILED SEPT. 2, 1910.

1,027,056. Patented May 21, 1912.

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F i j" a i ing:

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at the end of a rock arm 26. Said rock arm is made rigid with a short rock shaft .27 which has bearing in the front Wall 20" of the gear casing. -The rock shaft projects through the cover of the casing and has manner.

, 1 that by means of the member rigidly connected to its outer end a lever 28 adapted to be actuated by an operating member 29 which is led into a suitable place for convenient manipulation in the usual In the present instance said rocking. lever 28 is shown as connected by a pin 301-and a slot 30 to a link 31 which is operatively connected to a rocking lever 32 operated by the member 29. is apparent 29, the rocking lever 28 may be moved to swing the rock 'arm 26. Said rock arm 26 will move the frame 18 to bring the axis of the gear 17 to one side or the other of the line connecting the central axes of the gears 15 and 16.

Considering the gear 16 as relatively sta- .tionary, it Will be apparent that this movement of the gear 17 with the frame 18, will cause a. glven diameter of the gear 15 to 5 shift to the right or the left of its original in position with the frame 18 and the position, thus advancing or retarding the magnet shaft with reference to the gear 16 and therefore with reference to the crank gear 12. In Fig. 3 I have shown the parts gear 17 shifted to the right of the line connecting the central axes of the gears 15 and 16, in which case, considering the magneto shaft to be turning in the direction of the arrow, the' sparking 'period will be lagged. A

movement of saidgear and frame in the opposite direction will advance the sparking period. It is to be noted that the relative shift of the one predetermined diametric 4e axis of the magneto gear or driven gear relative to a certain diametric axis of the driving gear, will be effected whether the gears be at rest orin motion.

While I have illustrated and described herein a construction showing one embodiment of my invention, it is apparent thatthe details of construction may be modified without departing from the spirit of the in vention, and I do not wish to be limited in any ay thereby except as pointed out in the appended claims. I claim as my invention 2- 1. In an. explosive engine, in combination with a gear easing, a motor shaft mounted in said casing, a magneto, a driving gear actuated by the motor shaft, a driven gear having driving connection with the mag gear intermediate to, and,

neto. and an idle intermeshing with, the said driving and driven gears, said idle gearbeing so movably mounted as to afford movement of its central axis in a direction transverse to a straightline passing through theaxes of the said driving anddriven gears, in a path separate from, and intermediate to, the two circular paths and said n'iagneto gear, a sliding frai'ne in which said idle gear is journalcd, said frame being adapted to move in a direction transverse to a straight line connecting the central axes of the driving and magneto gears,

and means for shifting said frame to move the central axis of said idle gear to one side or the other of said straight 11110.

3. In an explosive engine, in combination with a gear casing, a motor shaft mounted in said casing, a magneto and a magneto shaft, a driving gear aetuated'by the motor shaft, :1 gear on the magneto shaft, an idle gear intermediate to, and intermeshing With, said driving gear and said magneto gear, a sliding frame in which said idle gear is journalcd, said frame being mounted in said Casing and adapted for movement in a direction transverse to a straight line connecting the cent *al axes of said driving and magneto gears; a rock shaft journaled in said casing, a rock arm on said shaft, means connecting said rock arm with said sliding frame and means for actuating said rock shaft to shift said frame for moving the central axis of the idle gear to one side or the other of said line.

4-. In an explosive engine, in combination with a gear casing, a motor shaft mounted in said casing, a magneto and a magneto shaft, driving gear actuated by the motor shaft, a gear on the magneto shaft, an idle gear intermediate to, and inter-meshing with,

said driving gear and said magneto gear, a sliding framc'in which said idle gear is journaled, said sliding frame being mounted in said easing and adapted for movement in, a direction transverse to a straight line conneoting the central axes of said driving and driven gears, said frame being proxided with laterally extending lugs, a rock shaft journaled in said casing, a rock arm on said shaft adapted to engage said lugs, and

' means for actuating said rock shaft to shift said frame for moving the central axis of the idle gear to one side or the other of said straight line.

5. In. an explosive engine,'in combination with a gear casing having front and rear walls, a motor shaft mounted in said casing, a magneto and a magneto shaft, a. driving gear actuated by the motor shaft, a gear on the magneto shaft, an idle gear intermediate to, and intermeshing with, said driving gear and said magneto gear, a sliding frame in line connecting the central axes of said driv ing and driven gears, lugs on said sliding frame, a rock shaft jonrnaled in said casing,

said rock shaft and lugs, and means for said rock shaftto shift said frame gear a rock arm secured to adapted to engage said to one side or the other of said line.

, 6. In combination a driving gear, a driven gear, an idle gear intermediate to, and intermeshing with, the said driving and driven gears, said idle gear being so movably mounted as to afford movement of its central axis in a direction transverse to a straight line passing through the axes of the said driving and driven gears, in a path separate from, and intermediate to, the two circular paths'in which said axis would travel if swung about the axes of said driving and driven gears and means for shirt inmsaid idle ear relativel to the drivin D b b and driven gears.

7. In; combination, a driving gear, a driven gear, an idle gear intermediate to, and inter-meshing with, said driving gear and driven gear, a sliding fame in which the said idle gear is journaled, said frame being adapted to move in a direction transverse to a straight line connecting the central axes of the driving and. driven gears, and means for shifting said frame to move the central axis of said idle gear,

In testimony, that I, claim the foregoing as my invention I aiiix my signature in the presenceof two Witnesses, this 23rd day of August A. D. 1910.

, AXEL L lVEDAHL.

\Vitnesses It. A. NonLiNe, JOHN J, Bonner.

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