Patent GB-293867-A (GB)
Title: Improvements in magazine gramophones
IPC: G07F17/30
Filed: 1928-07-11
Abstract: 293,867. Automatic Musical Instrument Co., (Assignees of Kenyon, B. C., Boa, W. W., and Green, C. H.). July 15, 1927, [Convention date]. Coin-freed magazine gramophones.-A coin controlled magazine gramophone is so constructed that on insertion of a coin in the appropriate slot, it will transfer any selected double-sided disc record from a magazine, deposit either side up as selected on a turntable, start the motor, return the played record to the magazine, and finally stop the machine. Coin control and selecting mechanism. Pivoted coin shoots 220, Fig. 2, corresponding in number to twice the number of double sided records provided for by the magazine, project through the glazed front of the casing. A coin inserted in any selected shoot falls into the grip of a spring 222, and on rocking the shoot the spring is spread by a. pivoted slotted lever 231 and the coin falls down a channel 216 and rocks a pivoted lever 236 so as co close a switch 14 in the motor circuit and release a. pivoted pawl 6, Fig. 17, corresponding to that shoot to fall into the path of one of a set of spirally arranged studs 40 on a cylinder 89. This cylinder is now driven by a chain 34, Fig. 1, from a shaft 27 driven through a clutch shown in Fig. 9 from a sleeve 17 on the turntable spindle 19, and the shaft 27 carries a cylinder 28 with a cam groove engaged by a stud 29 on the record transfer device which is thereby oscillated about the turntable shaft in synchronism with the rotation of the studded roller 39 so that the record taking device is opposite the selected record when a stud on the roller 39 comes against the pawl 6, Fig. 17, released by the coin. The pawl 6 is thereby forced bodily downwards until by the engagement of its tail with a bar 8 it is rocked into locking engagement with the arm 5 of the coin actuated lever 236. The downward movement of the pawl acts through lever and links 44, 45, 49, 56, 57, 58 and 59 to disengage the clutch shown in Fig. 9 and lock the roller 39 and the second triangular device in the set position. This clutch comprises a spring- pressed pin 64, mounted in one shaft and normally protruding into a hole in a sleeve at the end of the shaft to be connected. Disengagement is effected by a pivoted clutch fork 61 acting to press back the pin and also to lock the sleeve on the connected shaft by engaging the hole therein. Record magazine and transfer devices. The records 214, Fig. 10, are held in pockets 260 in an arcuate magazine 259 and lie in vertical planes radial to the turntable. The record transfer device comprises a plate 30, Figs. 1, 10 and 16, adapted to be rocked about a sleeve on the turntable spindle and provided with a head in which aligned plungers 101, 103, Fig. 16, swivelled together can be moved longitudinally by an arm 99, the plunger 103 being supported in a sleeve 120 capable of rotation by gear 122, 121. The plunger 103 is recessed and provided with rack teeth 104 engaging rack teeth on a plunger 106 swivelled to a part 108 which is slotted to engage arms 111 of record grippers 113 pivoted on a sleeve 118 capable of turning on a cylindrical extension 119 of the sleeve 120. The arm 99 and gear 122 are respectively carried by rods 98, 123, provided with " Hookes " joints 95, 96 and telescopic feathered connections 97, extending to operating spindles so actuated from a drum 91 Fig. 1, after the positioning the the plate 30 with the grippers opposite the selected record, that the sleeve 120 is rocked for the grippers to embrace the record, the plungers 101, 103 are moved to effect gripping of the record and the sleeve 120 is then rocked to transfer the record to the turntable one or other of the rack segments 160, 161 acting on the toothed bevel gear 288 during transfer to bring the selected side of the record uppermost. These parts operate in the reverse order after playing to return the record to the magazine and release it. Driving, starting and stopping and speed regulating. The motor 246, Fig. 1, when started by completion of the supply circuit by insertion of a coin into any desired coin shoot drives the turntable spindle 19 through a coil spring connected to the spindle and to a drum casing 18 driven by gearing 16 and a belt 251 from the motor and fixed on a sleeve 17 on the spindle, from which sleeve the various operative mechanisms are driven through the clutches described. A governor 20 geared to the turntable spindle 19 regulates the speed. The Specification as open to inspection under Sect. 91 (3 (a) also describes means for moving the tone-arm and sound-box to starting position, lifting and returning it after playing, and periodically ejecting a used needle and supplying a fresh one from a needle magazine. Totte-arms, raising, returning to starting position, lowering and positioning.-The drum controlling the transfer device makes one complete revolution for each record played, and after operating to supply a record to the turntable, a lug on the drum operates trip mechanism to engage a clutch 172, 173, Fig. 1, to drive a drum 177 having cam grooves 178, 188 which act through pins and linkages shown in Fig. 37, (Cancelled), to swing the tone-arm so that the needle is over the outermost record groove and then allow it to descend into the groove. During this action, the drum 177 makes a half revolution and its driving clutch is disengaged. As the playing of the record proceeds, the projection 295 on the tone-arm 165 acts through a linkage 182, 181, 339, &c. to raise a ratchet toothed bar 201 and when the playing is completed the usual eccentric groove in the record effects a reverse movement of this bar which operates to close the driving clutch of the drum 177 to make its further half revolution in which the cams 163, 178 act respectively to lift the tone-arm and return it to inoperative position, when the driving clutch for the drum is again disengaged. Before coming to rest, the drum 177 acts to re-engage the clutch the drum 91 to effect return of the played record to the magazine. The shaft. of drum 91 which makes one complete revolution to effect selection, playing, and return of a record carries a cam which on completion of a revolutiorr acts through levers and links 335, 13, Fig. 2, to open the starting switch of the driving motor. Supplying fresh needles automatically. - A worn needle is discharged and a fresh one supplied periodically and automatically from a needle magazine 358, Fig. 41 (Cancelled), by a cylinder 364 with a. transverse groove which is driven through changeable gearing from the drum 91 and carries a needle from the magazine to a shoot 365, bifurcated fingers 363 engaging the projecting ends of the needle to effect deliver and direct' it endwise so that it passes point downwards to a plunger 367. As the tone-arm is moved to inoperative position, a cam 377 acts on an arm 378 to release the needle in the socket of the sound-box so that it can fall out and the socket comes to rest over the plunger 367 which then rises to insert the new needle. The needle point is cleaned after playing by its passage across a brush 389. This subject-matter does not appear in the Specification as accepted.