US1315911A - Marie yves delage - Google Patents

Description

M. Y, DELAGE.

MAGNETO CONTROLLING DEVICE.

APPLICATION FILED 1uus29. 19:1.

1 ,3 1 5, 9 1 1 Patented Sept. 9, 1919.

2 SHEETS-SHEET 1.

Fig.1

M. Y. DELAGE. MAGNETO CONTROLLING DEVICE.

APPLICATION FILED JUNEZEJ. I917.

1,315,91 1. Patentedsept. 9,1919.

Fig.2.

2 SHEETS-SHEET 2. l

UNITED srArE-s PATENT oFFIoE. 1

MARIE YVES DELAGE, 0F PARIS, FRANCE.

MAGNETO-CONTROLLING DEVICE.

Application filed June 29, 1917.

To all whom it may concern Be it known that I, Manna Yvns Demon, residing at Paris, France, have invented a new and useful lvlagneto'CrJmtrolling Device, of which thefollowing is a specification.

This invention relates to a device for controlling a magneto for producing a magneto spark 011 semi-heavy motors and the like so that they can be started up by hand.

Explosion motors of the slow and semislow, and consequently semi-heavy, type, as used for navigating and certain other purposes, require either a battery or an aceun'lulater, and a sclf-induction coil for starting them up. It has not been possible, as a matter of fact, to start this type of motor by hzuid with a magneto, in that it is impossible to impart sufficient. speed to the flywheel to obtain sparks from a rotary magneto. Batteries and accunnilators are a source of trouble and necessitate-a conside able expense for upkeep.

The object of the present invention is to enable these heavy motors to be started by hand without deriving ignition sparks from any other source than their nnigneto.

The principle of the apparatus is as follows, namely, that by utilizing the cam shaft, and a second and larger multiplication driving gear added u) the direct drive of the magneto, this multiplication driving gear may be thrown. into engagement only for startingup the motor, and may be automatically thrown out of gear after a certain number of revolutions which are found in practice to be suflieient to start it. A permanent increase of the multiplication gear would be attended by the threefold drawbacks of a useless expenditure of power, rapid wear and tear of the gearing, and deterioration of the windings.

The apparatus may be constructed as hereinafter described.

Figure 1 shows the apparatus in side elevation parallel to the camshaft; and

Fig. 2 is an end view from the left-hand side of Fig. 1, (the lower part of the frame carrying the complete gear being shown removed in order to avoid concealment of the gearing).

The driving pinion 1 of the magneto is constructed loose upon. the cam shaft 2, to which it is connected by a ratchet 3 and a Specification of Letters Patent.

Patented Sept. 9, 1919.

Serial No..177,675.

ta-nce away there is fastened to the shaft 2 a spur wheel 7 which, as in the case of the pinion 1, is mounted loosely upon the shaft 2; this wheel 7 is connected to the shaft by a ratchet 8 and a spring-controlled pawl 9 with its spring 9 operated in the same direction as the pinion 1.

Parallel to the shaft 2 is arranged a spindle 10 to which there are keyed the pinion 12 engaging with the spur wheel. 7 and also a spur wheel. 1.1 of larger diameter, which engages with the pinion 6.

The efl ect of this arrangement is that, when the shaft 2 rotates in a normal direction, it rotates also the pinions 1, 6 and 7. The pinion 7 by reason of its respective diameters,communicates an increased speed to the pinion 12 which, throu h the medium of the shaft 10, rotates the p1nion 11 at the same angular velocity, but this latter, being 1 1n gear with the pinlon 6, causes rotat1on of the latter and of the bevel pinion 1 at an accelerated velocity 1n accordance with their different diameters. The effect of this that the pinions 1 and 6 rotate more quickly than the shaft 2, this increase of velocity being rendered possible by reason of the ratchet and pawl 3, 4;. The pinion 1 thus rotates at this increased velocitythe pinion l3 fixed to the spindle 14: of the winding of the magneto 15. parts 14, 15 of the magneto have been rotated through a right angle toward the bot tom of the figure, in order not to confuse (In the drawings, the

the drawing) This is the arrangement p which 1s brought into play when the motor is started up by hand at very low speed. The increase of speed brought about by the multiplying gear must be at a given ratio in accordance with the number of cylinders. It is necessary that other conditions should be observed; firstly, that the multiplication should be fairly large so as to cause sparking from the magneto at the speed which is imparted to it Whenoperating the flywheel While 1 will turn multiple of by hand; secondly, it is'necessary that the multiplication should be such as is not llkely to get the magneto out of time, this condltion being realized when the multiplication is equal to a whole number.

In practice, all the cylinders must igmte at each revolution of the cam shaft. Hence, an ignition must take place therein for each fraction of the revolution of thecam shaft equal to Q being the number of cylin ders; directly, therefore, an ignition takes place, a second ignition should beproduced when the cam shaft is rotated to the extent of Now, when 2 is rotated to the extent of 1 will have rotated to the extent of (M being the total multiplication of the multiplying gear equal to the product of the two intermediate multiplications) and, in order that 1 may be in. the right position at this moment, it is necessary that it should be turned by one whole number of revolutions per It is, therefore, necessary that should be an exact bi-polar, if for a rotation of 1 equal to In this case, therefore,

it will be in a position to furnishsparks every time it has turned to the extent of Q 1 instead of every time 1 1s turned by and the condition will then be that M is an exact 1 it might happen, if by mischance the motor were started a little in advance of the ignition, that the piston would be forced in a di rection contrary to the normal travel. The result would be that 1 would endeavor to rotate more quickly than 2 in the direction opposed by its ratchet and pawl, and the apparatus would be broken. Thanks, however, to the ratchet 8 and pawl 9 of the pinion 7 the shaft 2 does not engage the pinion 7 when it rotates in a direction opposed to the normal, and this drawback is thus avoided. Matters being thus arranged, the motor may be run by startingwith the hand, but the speed of rotation of the magneto If 7 were always fixed on 2,

would be much too high if the motor were to rotate at its usual speed, and the drawbacks mentioned above would ensue. It is therefore necessary to supplement the apparatus by an arrangement causing the automatic disengagement of the multiplication gear after a small number of revolutions sufficient to start up the motor.

Such an arangement may be as follows:

The countershaft 10 is arranged to slide longitudinally in its bearings 16 and 17 through which it projects at either end. At the end 16 a ring 18 on the shaft 10 limits its lateral movement toward the right. At the end 17, the shaft 10 is screw-threaded for a certain portion of its length, and this screw-threaded portion is limited by the two shoulder pieces 19 and 20. Upon this threaded portion is screw ed a short sleeve 21, which is shorter than the space between the shoulder pieces 19 and 20 so that the sleeve can move somewhat upon 10 in one direction or the other, according as it is screwed up or unscrewed, its movement being restricted by the shoulder-pieces 19 and 20. At its outer end the sleeve 21 is fitted with lugs which enable it to be screwed up or unscrewed by hand. The sleeve 21is also provided over part of its length with. an external thread consisting of a few threads only of the same pitch as its internal threads. For the re mainder of its length, the sleeve 21 is smooth and reduced'in diameter where it occupies the bearing 17.

The bearing 17 is itself screw-threaded in ternally over a portion of its length, the pitch and diameter of the thread being the counter-part of the thread on 21, so that, upon rotation of 21 upon the shaft 10, it is at the same time screwed into or out of the journal 17. Finally, a coiled spring 22is mounted on 10 between the boss of the pinion 11 and the adjacent journal 16, and tends to press the shaft 10 toward its screwthreaded end until stopped by the ring 18.

In the position shown in the drawing, the multiplication gear is shown in engagement; in this position, the part 21 is screwed into the journal 17and bears against the collar 19; and there remains on 10 between the end of the sleeve 21 and the collar 20 as many free threads as there are threads of 21 screwed into the bearing l'i'. The number of revolutions, therefore, which the apparatus must take prior to becoming disengaged, is determined precisely by the position of the collars 19 and 20 upon the shaft 10. In the position of engagement of the multiplying gear, if the flywheel be turned by hand, the shaft 10 on its rotation will be' locked to the sleeve 21 owing to the collar 19 being screwed against the end of 21. The shaft 10, therefore, also unscrews the sleeve 21 from its bearing 17. After a few'revolutions, during which the ignition of the motor takes place owing to the mult1 lication gear speeding up the magneto, the seeve 21 1s disengaged and the spring 22 then pushes the shaft 10 toward the right until stopped by the collar 18, but far enough to throw the multiplying wheels out of gear, at which moment the driving of the magneto 1s etfected direct on the normal speed increase given by the pinions 1 and 13.

After stoppage of the motor, and morass to start it afresh, the following steps are taken:

Unscrew the sleeve 21 on the shaft 10 by means of its lugs until it bears against the collar 20 then push the part 21 against the compression of the spring 2?. so as to engage the pinions, at the same time screwln 21 into the bearing 17 and along the shait 10 until it reaches the collar 19. The apparatus is then ready to restart.

It should be noticed that the number of threads of 21 engaged in the bearing 17 must be such as will allow oil. the cam shaft making at least one revolution prior to the sleeve being thrown out of engagement, so that the sleeve 21 must screw itself by at least as many turns as there are units 111 the multiplication of the pin1ons 7 and 12.

Finally, when the multiplying apparatus is thrown out of gear, it leaves the pinion 1 in any position due to the speed required, that, it the shaft 2 immediately rotated 1, then the magneto would be very likely to be thrown out of time.

This drawback has been overcome by the following structural arrangcmentz- If 1 were fixed on 2, the magneto, when once adjusted, would not be disarranged by the fact of rotation, the relative positions of 1 and :2 being unchangeable. In the present invention, however, 1 is loose on 2, and 2 rotates 1 in the normal direction of rotation only by means of the ratchet 3 keyed to 2 and oi the spring pawl 1 aifixed to 1. If the ratchet 3 had only one tooth, and ifthe adjustment of the magneto were realized when the tooth of the ratchet engages the pawl, then the adj ustinent might be momentarily destroyed, but would be automatically reestablished. It would, as a matter of fact, be destroyed because 2 would have engaged in advance with 1; directly the multiplying apparatus ceased to act (2 continuing to rotate while 1 no longer rotated) the ratchet would reengage the pawl and the adjustment of the magneto would be reestablished. It will be apparent, however, that in this case,

1 may be able to accomplish almost anen-l the revolution before the adjustment is reestablished. It is, therefore, preferable to make the ratchet with the maximum number of teeth compatible with retaining the adjustment. This maximum number is double the multiplication imparted by the pinions 1 and 13; if, for instance, this multiplication be 3, then the maximum number of the ratchet teeth wouldbe 2X3 equals 6.

As a matter of fact, if we call T the mulintothis position 2T, times to each revolution of 1. On 1 there are thus 2T equidistant points which can be indifl'erently substituted one for the other without alterz. tion of the adjustment of the magneto. Hence if 2T teeth be given to the ratchet, the magneto will remain adjusted or regulated quite irrespective of which one of these teeth will engage the pawl. On the contrary, any other point of engagement and, consequently, any tooth in excess of 21 would cause the magneto to be thrown out of time, if by chance the engagement were effected by its intervention.

The whole of the multiplyingapparatus may be mounted in a three-sided frame 23 supporting the shaft 10 and the ends of which, on the open side, are provided with bearings 2 1 and 25 traversed by the cam shaft 2, so that the frame is supported by this shaft. It then suilices to simply ailix this frame to the framework of the machine at such a point as 26 in order to prevent the whole from turnin If the bearings 2st and 25 carrying the frame are in two pieces, then the mutiplying apparatus may be added with the greatest ease to any type of existing motor, without modifying its construction and without much trouble, thanks to modifications which are simple and of moderate cost.

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is 1. A magneto accelerating device including an upper and lower shaft, a large and small. gear mounted on each of said shafts adapted during starting to register with the opposite small and large gear respectively,

the smaller gear upon the lower shaft being loosely mounted thereon and carrying means adapted to drive a magneto, and means associated with the upper shaft for moving the same longitudinally whereby to disengage the gears thereon from the gears upon the lower shaft after a certain number of revolutions.

2. A magneto accelerating device including an upper and lower shaft, a large and small gear mounted on each of said shafts adapted during starting to register with the opposite small and large gear respectively, the smaller gear upon the lower'shaft being loosely mounted thereon and carrying gears on the upper shaft have been thrown means adapted to drive the magneto, means out of engagement therewith.

associated with the upper shaft for moving In testimony whereof I aflix my signature the same longitudinally whereby to disenin presence of two Witnesses.

gage the gears thereon with the gears upon lWARIEv YVES DELAGE. the lower shaft after a certain number of Witnesses:

revolutions, and further means for locking CHAs. P. PREssLY,

said loose gear to the lower shaft after the NEIL JULIUS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, ZDLG.

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