US1374114A - Starting-crank for motors - Google Patents

Description

F. F. REDDING.

STARTING CRANK FOR MOTORS.

APPLICATION FILED SEPT. I9, 1919.

1,374, 114, Patented Apr. 5, 1921.

2 SHEETS-SHEET l.

F. F. REDDING.

STARTING CRANK FOR MOTORS.

A ATloN FILED SEPT. 19. 1919 1,374,114. I Patented Apr. 5, 1921.

2 SHEETS-SHEET 2.

' UNITED STATES FRANK FULTON REDDIN'G, OF NEW YORK, N. Y.

y STARTING-Gamm son. morons.

Specification of Letters Patent.

Patented Apr. 5, 1921.

Application led September 19, 1919. Serial No. 324,753.

To all wlw/m. t may concern Be it known that I, FRANK F. REDDTNG, a citizen of the United States, and a resident of the city of New York, borough of Queens, in the county of Queens and State of New York, have invented a new and Improved Starting-Crank for Motors, of which the following is a full, clear, and exact description.

This invention relates to new and useful improvements in internal combustion engines, and it pertains more particularly to a starting mechanism therefor. 4

The primary object of the invention is to provide a starting mechanism for internal combustion engines commonly employed in motor vehicles, and more particularly to engines used in trucks.

In motors employed for furnishing power for trucks, self-starting devices are not commonly employed, it being the general practice to start said motorsby hand-cranking operation. Furthermore, in engines of this character the compression is greater than in the smaller high speed, and, therefore, greater effort is necessary to perform the cranking operation.

It is a further object of the invention to provide means for preventing a movement of the starting crank in the reverse direction, which action sometimes occurs owing to a premature expansion in the motor cylinders and resulting` in injury to the operator.

Y With the above and other objects in View,Y

reference is to be had to the accompanying drawings, in which- I Figurel is a horizontal sectional view of the improved mechanism with a the motor vehicle andmotor shown in plan Fig. 2 is a sectional view taken on the line 2-2 of Fig. l; l

Fig. 3 is a sectional view taken on the line internal annular ange integral with. the.

Fig. 4 is a detail elevation of one of the connecting and disconnecting means, and

Fig. 5 is a sectional view taken on the line 5 5 of Fig. 1.

Referringmore particularly to the drawings, the reference character 6 designates a portion of the motor Lvehicle frame, the forward end of the crank shaft of. the 'motor being designated by the reference character 7. The forward end of the crank shaft 7 is provided with ratchet teeth 8, and rotatably mounted in the motor frame 6, is a shaft 9,

portion of,\

the rear end of which is provided' with ratchet teeth 10, adapted to engage with the ratchet teeth 8 of the forward end of the crank shaft 7 for the purpose of rotating the latter to start the motor. The ireference character 11 designates a housing, and said housing is provided with an annular flange 12, which is perforated as indicated by the reference character 13, for the reception of suitable securing means 15, which in the present instance, is shown as bolts. The housing 11 is provided with a rear plate 16 and a front plate 17. The rear plate 16 is suitably secured to the motor vehicle frame 6 in any desired manner. The front plate 17 is also suitably secured to the Open end of theyhousing 11 to forma closing plate therefor, and said closing plate is provided with a central opening 18, the purpose of which will be hereinafter more specifically described. r

The rear plate 16 is provided at equidistantly spaced intervals with a plurality 0f pins 19, and pivotallymounted on each o f said pins 19, is a pawl 20. Rigidly 'secured as at 2l, to each of said pawls, is a spring 22, the free end of which projects beyond the pawl and engages behind a pin 23, as shown in Fig. 2. The plate 16 is further @provided with a hub extension 24, and rotatably mounted on said hub extension 24, is a ring 25', said ring being provided on itsI periphery with a plurality of teeth 25 with which the pawls 20 are adapted to engage for a lpurpose to be hereinafter more specically described. The front face of this ring 25 is provided with a plurality'of teeth 27, and adapted 'for engagement with the teeth 27, are a plurality of teeth 28, carried on the rear face lof a member 29, which is ysplined to the forward end of the shaftV 30 by means of a key 29.

The reference Vcharacter 31 designates an said gearsv carry pinions 33 and 34, which engage' in the annular flange 3,1 and the front plate 17, respectively. The member 29 heretofore mentioned is provided with a plurality of peripherally arranged teeth 35, which are adapted to en age wlth the teeth of the gears 32, as best s ownin Figs. 1 and 3.

i with the small reduced tubular engagement with 25 Rotatably mounted on the forward extension 30 of the shaft 9, is a member 40, which has a reduced tubular extension 41, and said member 40 is provided with a plurality of teeth 42, which engage with the teeth of a large gear wheel 43 carried by and operated gears 32 heretofore mentidned.

The reference character 44 designates a starting crank, and said crank is adapted to be positioned on the reduced tubular extension 41 and secured thereto by means of a wing nut 45 and bolt 46, when it is desired to crank the engine through the gearing heretofore described for giving increased power to the, cranking operation.

Keyed to Jthe free extremity of the forward extension 30 of the shaft 9, as by means of the transverse key 46, is a sleeve 47 and said sleeve 47 is spaced from the forward end of the reduced tubular extension 41 by a washer or the like 48.

When it is desired to crank the motor directly without employing the gears, said starting crank 44 is secured to the sleeve 30.

rlhe operation of the device is as follows: With the crank handle 44 attached to the extension 41, if it be pushed inwardly or to the left in Fig. 1, it will be seen that the teeth of the members 8 and 10 will be engaged with each other, and that the crank shaft 7 will be operatively connected with the shaft 9. This movement likewiseengages the teeth 27 and 28 of the members 25' and 29, respectively, so that said members are operatively connected in such a manner that they will rotate in unison.

lf now a rotary motion be imparted to the crank handle 44, it will be seen that through the medium of the gearteeth 42 meshing with the gears 43, said gears will be rotated and through the medium of the gear wheels 32 meshing with the teeth 3,5 of the member 29, said member 29 will likewise be rotated, and through the medium o-f its teeth 28 in the teeth 27 of the ring said ring 25 will likewise be rotated. The rotation of this ring is permitted by reason of the teeth 25 riding under the several pivoted pawls 20.

By this arrangement through the mediuml l of this reducing gearing upon ,every two rev- 4reverse the member 25 olutions of the crank handle ,44, one revolution of the crank shaft 7 will be obtained, thus reducing the power required for rotatin thecrank shaft 7.

" Tith the parts in the position described in the foregoing, should a premature explosion take place in an of the cylindersof themotor and the shaft 7 be rotated in the reverse direction, it Willbe seen that the tendency to in the opposite direcretraite tion will be overcome by reason of the engagement of the pawls 20 with the teeth 25. If the ring 25 is prevented from reversing, it will be seen that yas the shaft continues to rotate, the teeth 27 and 28 will be disconnected by reason of the teeth 28 riding backwardly on the teeth 27, and that in discon-4 nectfing said teeth, the member 29 will be moved longitudinally of the shaft extension 30, and at the same time, this movement is employed to disconnect the members 8 and 10 in such a manner as to prevent a driving in ,the reverse direction of the shaft 3() and the crank handle 34.

FromI the foregoing, it will be apparent that the present invention provides means aoV for driving interengagement with each other,

one of said members being keyed to the shaft and 'the other free to rotate thereabont, means operated by the sleeve for driving the member keyed to the shaft when said sleeve is rotated in one direction, and means for preventing movement of the other of said members upon movement of the sleeve in the opposite direction.

2. A starting device for motors comprising a shaft adapted to be directly connected to the crank shaft of a motor to be started, a sleeve loosely mounted on said shaft, a gear keyed to' said shaft, means for driving said gear and shaft from said sleeve in one direction, and means for preventing movement of said gear and sleeve in the opposite direction, said means serving to automatically disconnect the shaft and motor crank shaft.

3. A starting device for motors comprising a shaft adapted to be directly connected to the crank shaft of the motor to be started, a sleeve loosely mounted on said shaft, a gear keyed to the shaft and having a notched face,

Images