Patent GB-381682-A (GB)
Title: Improvements in or relating to gramophones or like musical instruments
IPC: G11B17/02
Filed: 1931-09-02
Abstract: 381,682. Magazine gramophones. TAYLOR, W. J., 39, Sutton Street, and TAYLOR, C. A., 9, Swarcliffe Road. Darnall, both in Sheffield. Sept. 2, 1931, No. 24607. [Class 40 (ii).] A magazine gramophone is provided with means for delivering a record from a magazine to a turntable and, after playing, for transferring the record in a reversed position to a second turntable for playing the reverse side. The apparatus includes a record holder comprising two rotatable members 1, 2, Fig. 1, upon which are helical threads 3, Fig. 3, to hold the records 4. The members 1, 2 are mounted on shafts 5, 6, Fig. 2, carrying bevel wheels 7. 8 respectively, which gear with bevel wheels 9, 10 upon a shaft 11. The shaft 11 carries a sprocket wheel 12 which reciprocates an eccentric rod 13 operating a toothed segment 14 and gears 15, 15a to give horizontal movement to a rack 16 having an upwardly turned end to which is pivoted at 19 a cradle 18. A spring 20 tends to keep the cradle in its normal vertical position. Also mounted on the shaft 11 is a framework 21 carrying the turntable spindle 22 and turntable 23 and the framework 21 is rotatable with the shaft 11. Mounted on the spindle 22 is a bevel wheel 25 which engages with a bevel wheel 26 upon a shaft 27. A cam member 30 is provided on a bearing 29 of the shaft 11 and is adapted to displace a lever 31, when the framework 21 rotates about the axis of the shaft 11, to move a pivoted catch into engagement with a record on the turntable to prevent such record from dropping off the turntable. Freely rotatable upon the shaft 11 is a clutch member 33 connected by gearing 35 with a shaft 35a driven from the driving motor shaft '65. The other clutch member 34 is keyed on the shaft 11 and is normally made non-rotatable by the engagement of a .pin 36 with a hole in a fixed plate 37. A plate 39 is rotatable with the pick-up arm 38 and a slot 40 in the plate 39 is adapted, when the stylus enters a run-off groove at the end of a record, to register with a lever 42 which thereby moves upward and so depresses a lever 44. This brings a cam face 44a into the path of a cam block 45 which, as the gear 35 rotates, engages the cam face 44a and raises it. This movement causes the lever 44 to rotate so that a fork member 46 engages a flange 47 to withdraw the pin 36 from the plate 37 and bring the clutch members 43, 44 into engagement to rotate the shaft 11. Movement of the member 44 causes movement of a lever 42a to withdraw the lever 42 from the slot in the plate 39. At the same time a lever 48 on the member 46 operates to withdraw a shaft 49 from its clutch engagement at 50 with a shaft 27 and so disconnects the drive to the turntable spindle. Actuation of the lever 44 also causes depression of a lever 52 to operate a member 54, which lifts the reproducer stylus off the record, and movement of levers 55, 56 which engage a finger 57 on the pivot of the pick-up arm to swing the latter away from over the record. The pick-up arm then rests against a guide member 58 which ensures correct positioning of the stylus when playing again commences. and to give a steady downward movement of the pick-up a spring or fluid-controlled damper 59 is provided. If the damper is air-controlled it is re-charged by movement of a lever 60 pivoted to the lever 53. The second turntable 23a whose operative parts are similar to those of the turntable 23 serves to deposit the record after playing in a container 69 the record being held on the turntable until it is in a position to be dropped by two straps 70. When the turntable 23a is rotating the mechanism of the turntable 23 is disconnected from the driving shaft 65 through levers 61, 62, 63 and a clutch 64 operated by the fork member 46a. To change a record at will before the playing is completed a sleeve 42c is provided, Fig. 3, which when rotated by a handle outside the cabinet causes a lever 43a to engage and rotate a lever 44 to cause the record to be deposited on to the second turntable. For manual operation of the machine a tone-arm support member 74, Fig. 7, is pivoted to the guide member 58 and when this member 74 is manually depressed to the position to hold the pick-up arm in its inoperative position a pivoted lever 76 is operated to engage a pin 78 on the rod 42b to rotate the latter slightly and this withdraws the lever 42 from operative contact with the plate 39. Starting and stopping of the turntable are then controlled by a rod 71 which upon rotation causes engagement of a cam 72 with a collar 73 on the shaft 49 to move the latter out of engagement with the shaft 27. In operation when the stylus enters the run-off groove the lever 42 is operated and the shaft 11 and framework 21 rotate and the record holders 1, 2 move the next record forward and by means of the rod 13 the cradle 18 is moved towards the holder while the framework 21a is set in rotation through sprocket wheels 12, 12a and a belt 12b, the turntables 23 23a being always in opposed positions. After rotation of the turntables through 180‹ the lever 31 disengages the cam 30 to cause retraction of the catch holding the record to the turntable 23 which slides off to the now upwardly-projecting spindle of the turntable 23a. Thereupon the elements of the clutch 50a engage and the turntable 23a starts to rotate and its pick-up is lowered on to the record. After playing of the reverse side further rotation of the shafts 11, 11a commences and the cradle 18 at the limit of its outward travel receives a record from the holder and commences its backward movement after part of which its upper portion contacts with stops 5a, 6a, Fig. 2, so that the cradle commences to tilt against the pressure of the spring 20 until the turntable 23 has rotated through 270‹ when the angle of the cradle is such that it slips past the stops 5a, 6a and is caused by its spring 20 to spring forward and deposit the record on the turntable 23 which then returns to its normal playing position. Meanwhile, the turntable 23a has rotated down to the reverse vertical position wherefrom the played record is discharged into the holder 69.