US2480550A

US2480550A - Automatic recoiling pull starter

Info

Publication number: US2480550A
Application number: US782499A
Authority: US
Inventors: Robert V Catlin
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-10-28
Filing date: 1947-10-28
Publication date: 1949-08-30
Anticipated expiration: 1966-08-30

Description

Aug. 30,' 1949. R. v. cATLlN 2,480,550

AUTOMATIC RECOILING PULL STARTER I Filed oct. 2s, 1947 2 sheets-sheet 1 Aug 30, 1949 R. v. CATLIN AUTOMATIC RECOILING PULL STARTER 2 Sheets-Sheet 2 Filed Oc. 28, 1947 ATTE! RN EYS Patented ug. 30, 1949 UNITED STATES PATENT oEElcE AUTOMATIC RECOILING PULL STARTER Robert V. Catlin, Minneapolis,'Minn.

Application October 28, 1947, Serial No. 782,499'

(Cl. 12S-179) 3 Claims. 1

This invention relates to an automatic recoiling pull starter for internal combustion engines.

It is an object of the present invention to pro-` vide a pull starter adapted for use with internal combustion engines wherein upon the pull of the rope a return spring will be wound and upon the release of the rope the spring will serve to return the starting rope automatically to the pulley, the driving arms having been automatically released from the driving sprocket.

Other objects of the present invention are to provide a recoiling pull starter for internal combustion engines which is of simple construction, inexpensive to manufacture, easy to install upon the engine and efficient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Fig. 1 is a front elevational view of the pull starter.

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a transverse sectional view of the starter taken on line 3-3 of Fig. 2, and showing the driving arms in engagement with the sprocket.

Fig. 4 is a transverse sectional view taken on line 4-4 of Fig. 2 and looking in plan upon the actuating spring.

Fig. 5 is a sectional view taken on line 5-5 of Fig. 3.

Referring now to the figures, I0 represents a fly Wheel of an engine to which my pull starter is attached by fastening screws II. These fastening screws extend through a disc I2 having notches I3 circumferentially spaced therearound. Adapted to enter the notches I3 are driving arm studs I5 extending from driving arms or links I6. The driving arms I6, of which there are two in number, are respectively pivotally connected to pulley I1 by fastening screws I8 as shown in Figure 5. The driving arms are guided in and out of the notches I3 by a guide 2l having slots 22 disposed respectively in the opposite ends thereof in which there is slidable driving arm guide pins 23. These pins extend through the slots and also through the driving arms and serve to limit the pivotal movement of the driving arms.

The pulley I'l is rotatably mounted on a shaft 24 which is lxedly mounted in a housing 25 in which it is secured by a lock nut 26 with a washer 21 under the nut. The housing can be fixed to the engine block and will enclose the parts. On the inside of the housing is a ber block 28 to which a spring 29 is anchored by a lug 3|, Fig. 4. The

2 pulley Il has a flange 33 for confining the spring 29 on the outer face of the same. The ends of the spring are provided with spring lock pins 54 and 35 respectively.

About the pulley there is extended a cord 3l which is passed several times therearound and which has a handle 38 on the outer end of the same which is pulled to effect the rotation of the pulley and the winding up of the spring 29. A projection 39 may be provided on one side of the housing for guiding the cord 3l from the housing.

Within the bore of the pulley there is provided a guide spring retainer 4I through which the pulley is mounted on the shaft and this retainer provides a housing for retaining the spring l2 extending about the shaft 24.

The spring 42, being in compression in the retainer, urges the friction washer 44 against the guide 2I and thereby frictionally holds the guide against the flange or head 45 of the stud forming the shaft 24. The friction between these parts is sucient upon rotation of the pulley Il when the cord 31 is pulled outwardly to actuate the guide 2I so that the pins 23 move inwardly in the slot 22 and in this movement the studs i5 in the arms I6 engage with the notches I3 of the disk I2. With the studs I5 in the notches I3 the engine shaft will be rotated as the pulley is rotated by the cord as the pulley I1 is connected by the arm I6 through the studs I5 with the disk I2 as shown in Figure 5.

While the rope or cord 3l is being pulled, the unit is turned and the main spring is wound up. When the rope is released, the main spring 29 actuates the unit in the opposite direction thereby causing the driving arms to disengage from the notches of the disc as the unit revolves back to its normal position. The guide 2I will remain motionless until the driving arms I6 have engaged with the notches of the disc and will then slip to allow the guide to revolve with the unit. The spring 42 exerts a constant pressure upon the friction washer 44 which in turn binds the guide 2| between the friction washer and the flange 45.

This starter is designed primarily for use on outboard motors and for small gasoline engines not originally equipped with a pull starter.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

I claim:

1. An automatic recoiling pull starter for an engine having a ywheel and an engine housing.

comprising a disc with notches in the periphery and having means by which it may be attached to the y wheel of the engine, a pulley having a pull cord groove in the periphery, a starter housing enclosing the pulley and disc and having means for mounting the said starter housing on the engine housing, a spring in the pulley with one end connected to the pulley and the other to the starter housing, a shaft carried by the starter housing .on which the pulley is rotatably mounted, a guide having slots therein mounted on the shaft, and arms having pins extended through the slots of the guide with one of the ends of the arms pivotally mounted on the pulley and with studs earried by the opposite ends of the arms .positioned to engage the notches in the periphery of the disc.

2. An automatic recoiling pull starter for an engine having a y Wheel and an engine housing, comprising a disc with notches in the periphery and having means by which it may be attached to the y Wheel of the engine, a pulley having a pull cord groove in the periphery, a starter housing enclosing the pulley and` disc and having means for mounting the said starter housing on the Vengine housing, a spring in the pulley with one end connected to the pulley and the other to the starter housing, a shaft carried by the starter housing on which the pulley is rotatably mounted, a guide having slots therein vmounted on the shaft, arms having pins extended through the slots of the guide with one of the ends of the arms pivotally mounted on the pulley and with studs carried by the opposite ends of the arms positioned to engage the `notches in the periphery of the disc, said shaft carried by the starter housing having 4 a head on the inner end thereof, and resilient means urging the said guide against the head of the shaft.

3. In an automatic recoiling pull starter for an engine having a fly Wheel and an engine housing, a disc with notches in the periphery and having means by which it may be attached to the ily Wheel of the engine, a pulley having a pull cord groove in the periphery, a starter housing enclosing` the pulley and disc and having means for mounting the said starter housing on the engine housing, a spring in the pulley with one end connected to the pulley and the other to the starter housing, a shaft carried by the starter housing Qn which the-pulley is rotatably mounted, a guide having slots therein mounted on the shaft, arms having pins extended through the slots of the guide with one of the ends of the arms pivotally mounted on the pulley and with studs carried by the opposite ends of the arms positioned to engage the notches in the periphery of the disc, and a pull eord` mounted in the cord groove of the pulley with a knob on the outer end positioned on the exterior of the starter housing.

ROBERT V. CATLIN.

REFERENCES CITED The following references are of record in the Ille of this patent:

4UNITED STATES PATENTS Number Name Date l1639,5'l'4 Parr Nov. 2, 1875 934,576 Seyler Sept. 2l, 1909