US1375472A - Mechanical starter for internal-combustion engines - Google Patents

Description

H. -J. SIMPSON. MECHANICAL STARTER FOR INTERNAECOMBUSTION ENGINES.

v APPLICATIONIFHTED JULY sL-lszo. 1,375A72.

PatentedApr. 19, 1921.

3 SHEETSSHEET l' J77 re n 750 7- 54237-5 7"? anus VIM/x072, '57 WWW Kfia r7253 I H. J. SIMPSON. MECHANICAL STARTER FOR INTERNAL COMBUSTION ENGINES.

APVPLICATIVONVHLED JULY 3|, 1920; 1,375,472. Patented Ap .19, 1921.

3 SHEETS-SHEET 2.

$157.2. /6 4 g 2 l 25 /4 27 0 O I 3 /a n 0 Y 7 J O 20 24 Ll O 4 0 APPLICATION FIYLED JULY 3|, 1920. 1,375,472;

H. J. SIMPSON.. MECHANICALISTARTER FOR INTERNAL COMBUSTION ENGINES.

3 SHEETS-SHEET 3- Ira/1271227 flere ri Qme: Jim :070

3 wwwmm I iiia'rnilj- Patented Apr. 19,1921.

a rs stares rarest crates..

V HERBEET JAMES SIMPSON, OF NORTON-ON-TEES, ENGLAND.

MECHANICAL STARTER F03. INTERNAL-COILEBUSTION ENGINES.

Specification of Letters Patent. Patentqed Apr. 19, 1921.

Application filed July 31, 1920. Serial No. 400,564.

this kind adapted to convert ajrectilinear motion into a rotarymotion for startin the vehicle or the like by means of a hand ever or pedal lever actuated by the driver from his seat in the vehicle or the like.

The invention consists in the improved mechanical starting apparatus for internal combustion engines, more particularly of motor driven vehicles, comprising a starting drum or cylinder, rotatably mounted within a casing and geared to the engine shaft, pro vided with one or more double endless spiral grooves in which pins engage, each pin belng secured to one end of an operating rod having a rectilinear motion in suitable guides within and parallel to the longitudinal axis of the casing, the other end of the rod being linked by a connecting rod or the like to a starting lever adapted for manual or pedal operation. v

The chief advantage of the present invention lies in the fact that the rotation of the drum is always in the same direction. whether the starting lever be moved forward or backward, this feature being obtained by the use of the above mentioned double endless spiral grooves.

In order that the nature of the invention may be clearly understood the preferred form of the improved starting apparatus will now be described with the aid of the accompanying drawings in which Figure 1 is a side view of the apparatus connected.

' up to a starting lever; Fig. 2 is a plan view of the apparatus shown in Fig. 1, the cover being removed and the connection to the starting lever omitted; Fig. 3 is a side View of the grooved drum shown in Fig. 2 looking in the direction of the arrow III.

Fig. 4 is an elevation and Fig. 5 a part section of a modified construction.

Referring to Figs. 1 2 and 3 of the drawings,the apparatus shown comprises cylindrical casing 1 in which is mounted a drum or cylinder 2, the shaft 3 of which rests in suitable bearings 4, 5, at the-ends of the casing 1, the drum shaft 3 being provided at each end with collars 6 and ball bearings 7 to take the thrust of the drum.

'The 'surfaceof the drum 2 is slotted to form double endless spiral grooves crossing each other and running in opposite directions around the drum. Two such endless spiral grooves 8, 9, are shown. Each groove, makes a half revolution in the whole length of the drum and completes the revolution by re turning on the opposite side of the drum to its starting point.

The casing 1 is provided with a cover 10, I

the space between the casing and the cover forming rectilinear guides 11 in which slide crossheads 12, 13, attached to tworods 14, 15, one on either side of the drum 2. Attached to or forming part of these crossheads are pins 16, 17, which respectively engage in the spiral grooves 8, 9, of the drum as shown.

When the pin 17, for example, moves forward along its groove 9, the drum 2 is rotated until the pin 17 reaches the farthest point of the groove. The pin then will have rotated the drum 2 through half a revolution. On being moved backward the pin 17 still moves in its own groove 9, but in the section of the groove on the opposite side of the drum (Fig. 3), thus returning to its starting point in the groove and cansmg the drum 2 to rotate in the same direction as before (Figs. 2 and As shown, the rods 14, 15, slide through stuffing boxes 25', 26, and are connected by a cross bar 18 having lugs 19, 20, pierced with a hole to take a pin 22 securing the connecting rod 21 which is also pivotally connected to the starting lever 23. At the other end of the drum .2 a ratchet wheel 24 is provided co-acting with a pawl 28, while a sprocket wheel 27 is secured upon the a ther half revolution in the same dirction as before, thus providing a continuous rotary motion. a

The rotary motion of the drum shaft 3 is transmitted by the sprocket wheel 27 which acts as a free Wheel, that is, revolves freely in one direction only, by an endless chain to the sprocket Wheel fixed on the en gine or motor shaft.

In the arrangement shown in Figs. 4 and 5 only a single groove 9 is provided in the drum 2 and the pin 17 engaging in the groove iscarried, by a sliding plate A Which is connected to the starting lever as before. i i i It is evident that various modifications might bemaderin the details of the apparatus described above and illustrated in the drawing without in any Way altering the essential character of the apparatus.

"What I claim anddesire to secure by Letters Patent is A; manually operated starting apparatus for internal combustion engines, comprising, in combination, a cylindrical casing providedwith alongitudinal slot, a thrust bearing at each end of said casing, a rotary drum iournaled there1n,a ratchet Wheel at one end of said drum, an endless inclined groove formed in the surface of the drum proceeding from a point near one end of the drum and coinciding With one end of ber supported near one side of the casin L- a:

and parallel to the axis of the drum, a proection upon said member engaging in the endless groove in the drum and Working on said groove in the casing, a pawl Within the casing adapted to engage the said ratchet to permit rotary movement in one direction only manually operated means for reciprocating said member and means for transmitting the rotation of the drum to an engine shaft.

In testimony whereof I have signed my name to this specification. a

HERBERT JAMES SIMPSON.

Images