Патент USA US2117999код для вставки
May 17, 1938. ‘M, P_ WHITNEY 2,117,999 ENGINE STARTER DRIVE Filed Jan. 27, 1937 rwwllllpwlm I ' Add/was‘: INVENTOR. . I v WWW "040W ‘ m. _ Patented May 17, 1938 f I 0 UNITED v 2,117,999 STATES PATENT‘ oFFICES ' 2,117,999 ENGINE STARTER DRIVE Maurice P. Whitney, Elmira, N. Y., assignor to Eclipse Machine Company, Elmira, N. Y., a cor poration of New York Application January 27, 1937, Serial No. 122,580 3 Claims. The present invention relates to engine starter rotatably connected to an enlarged portion 9 of drives and more particularly to an improved the screw shaft and seating against a shoulder I I thereon. The other end of the spring" is anchored to the sleeve I by means of a similar anchor member I2 n'on-rotatably mounted on an fastening arrangement for retaining the parts 5 of the drive in assembled relation. Engine starter drives as articles of commerce are usually in the form of a unit adapted to be mounted on the extended armature shaft of a enlarged portion‘ I0 of the sleeve and adapted to bear against a split thrust ring l3 seated in starting motor, and incorporate means for so a groove I4 in the sleeve. locating the drive thereon that when the starting 10 motor is mounted in its intended position, the drive pinion will be in proper position to engage and cooperate with a gear on a member such as the ?ywheel of the engine to be started. Thus in the form of starter drive disclosed in the patent 15 to Sekella 2,062,480, the elements of the drive are assembled on a sleeve which is located on a motor shaft by means of a pin and key. It is an object of the present invention to provide a novel starter drive assembly which forms a unitary article of commerce especially Locating and retaining means for the sleeve on the motor shaft 6 is provided in the form of 10 a pin I5 slidably mounted in a radial aperture I6 (Fig. 3) in the sleeve and adapted to extend inwardly into an opening in the shaft as indicated in dotted lines in Fig. 2, being retained in such position by the anchoring member I2 when the drive is mounted on the motor shaft. A key I‘! (Fig. 2) of standard construction is preferably provided for non»rotatably connecting the sleeve to the motor shaft when mounted thereon. When the drive is assembled for shipment, the 20 adapted for easy and rapid mounting and attach pin I5 is held in withdrawn position and the parts ment to a motor shaft. so retained thereby as to facilitate mounting on the motor shaft. As here illustrated, this is ac It is another object to provide such a device including novel means for locating and retaining the drive on the motor shaft. It is a further object to provide such a device embodying special provisions for preventing the locating and retaining means from becoming dislodged by handling or vibration of the drive in shipment and distribution. Further objects and advantages will be appar ent from the following description taken in con nection with the accompanying drawing in which: - Fig. 1 is a side elevation partly in section of a starter drive embodying the present invention; Fig. 2 is an end view from the left in Fig. 1; and Fig. 3 is an enlarged sectional detail showing the parts as they are assembled in the drive for 40 shipment. Referring to the drawing, there is illustrated in Fig. 1 a barrel type drive of the type disclosed in the patent to Sekella cited including a sleeve I on which is slidably J'ournalled a screw shaft 45 2 having a nut 3 threaded thereon. The nut 3 is rigidly connected by means of a barrel 4 to a pinion 5 which is adapted to slide freely on the extended armature shaft 6 of a starting motor and to be moved by said nut and barrel into and 50 out of engagement with a member, not illustrat ed, of an engine to be started. The sleeve and screw shaft are yieldably con nected by means of torsion and compression complished by making the opening I6 in the sleeve slightly larger than the pin I5 and by 25 forming a shallow circumferential recess or groove I8 adjacent the outer end of the pin. When the parts are assembled, the spring ‘I is compressed sufficiently to permit the anchor member I2 to clear the opening I6 in the sleeve, 30 whereupon the pin I5 is inserted in said opening and the spring ‘I permitted to expand. The ex pansion of the spring forces the anchor member I2 against the pin I5, causing it to tilt slightlyv and bind in the opening I6 whereby it is held 35 ?rmly against displacement due to handling or vibration during shipment and distribution. The anchor members 8 and I2 are formed commercially as stampings, and when so formed, there is a sharp edge or corner I9 left around its 40 central opening. The recess or groove I8 in the pin I5 is formed to accommodate the edge I9 on anchor member I2 (Fig. 3), forming therewith an interlocking connection which further insures against undesired dislodgment of the pin I5. 45 When the drive is to be mounted on a motor shaft, it is merely necessary to place a key I‘! in the shaft and then slide the drive on the shaft until the pin I 5 registers with the opening in the shaft. The pin I5 is then forced into said open ing,» whereupon the spring ‘I expands and moves the anchor member into the position illustrated in Fig. 1 where the parts are all locked in posi drive spring ‘I anchored at one end to the screw . tion. Although but one embodiment of the invention 55 55 shaft 2 by means of an anchor member 8 non 2 7 2,117,999 has been shown and described in detail, it will be understood that other embodiments are possible and various changes may be made in the arrange ment of the parts without departing from the spirit of the invention as de?ned in the claims appended hereto. What is claimed is: a 1. In a starter drive, a sleeve adapted to be mounted on a motor shaft, a screw shaft slid ably journalled on the sleeve, means transmitting rotation from the sleeve to the screw shaft in cluding a torsion and compression spring and an anchor member therefor slidably but non-rotat ably mounted on the sleeve, and means including a pin loosely mounted in the sleeve and adapted to serve as an abutment for said anchor member to limit the expansion of the spring, said pin and anchor member having interengaging portions serving to resist displacement of the pin. 2. In an engine starter drive, a sleeve, a hollow shaft slidably journalled thereon, a stop member on the sleeve limiting sliding movement of the shaft in one direction, a drive spring, means anchoring one end of the spring to the shaft, slidable means non-rotatably connecting the other end of the spring to the sleeve, and a pin loosely mounted in the sleeve adapted to engage said slidable means to hold the spring under com pression, the expansive force of the spring serv ing to bind the pin in the sleeve and resist dis lodgment thereof. 3. In an engine starter drive, a sleeve, a hollow shaft slidably journalled thereon, a stop mem 10 ber on the sleeve limiting sliding movement of the shaft in one direction, a drive spring, means anchoring one end of the spring to the shaft, slidable means non-rotatably connecting the other end of the spring to the sleeve, and a pin 15 loosely mounted in the sleeve adapted to engage said slidable means to hold the spring under com pression, said pin having a recess and said slid able means having a portion adapted to engage in said recess under the expansive force of the 20 spring and resist dislodgment of the pin. MAURICE P. WHITNEY.