Patent GB-191001252-A (GB)
Title: Improvements in and relating to Disc Talking Machines.
Inventor: LISTER JAMES D ARCY
Filed: 1910-01-18
Granted: 1911-01-12
Abstract: 1252. Lister, J. D'A., and Harris, W. Jan. 18. Multiple machines; driving. - An automatic multiple-disk gramophone has its record disks mounted on radial arms, which are successively rotated under the sound-box by one motor, and are rotated for reproducing by another motor. The sound-box is automatically lifted at the end of each reproduction, returned to its initial position, and finally lowered upon the next record. Fig. 1 shows an elevation and Fig. 3 a plan of the apparatus. Fig. 1 shows the apparatus when playing a record. At the end of the playing, a hooked arm 21, which secures the record disk 20 to the turntable 19, engages with and oscillates the lower end 56 of a T- shaped lever 56, 56<1>, 56<11> whereby a stud 55 on an eccentrically-mounted cam 53 is freed, allowing the cam to fall and revolve upon the rotating record and thus raise the sound-box 4 by turning it in its socket on the tone-arm 3. A pin 62 on the sound-box then rocks a twoarmed lever 60 and depresses a roller 64 at the lower end of its depending member 63, to bear against and lower a roller 50 mounted on a two-armed lever 48, so raising a stop 49 out of the path of a roller 16 mounted at the end of each of the radial arms 15 and leaving the record 20 and turntable 19 free to rotate. A motor within the casing 1, which has a winding- means 23 and is provided with means to prevent backward rotation, now begins to rotate the support 14<1> which carries the radial arms 15 and turntables 19, to bring the next record into position. While this is occurring, a stud 41 on the casing 14<1> oscillates an arm 39 secured to an horizontally pivoted rod 37, and causes a roller 42 at its other end to rotate the tone-arm 3 on the pivot 6 into its initial position, that is, until the roller 16 on the radial arm 15 reaches the roller 49 on the two-armed lever 48, which position is adjustable by a screw 79 on the tone-arm engaging a projecting rod 78 The next record now coming into position has a preliminary rotation given it by its driving spur-wheel 18 engaging a toothed rack 44 secured to the casing, before the spur-wheel 18 engages the main driving spur-wheel 13, which is rotated by the main motor within the casing 1. The driving spur-wheel 13 is in connexion with its vertical shaft 11 through two ratchetwheels 13 and pawls 45, whereby the speed of the engaging turntable spur - wheel 18 is equalized with that of spur-wheel 13. The cam 53 is now rotated into the position shown in Fig. 1 by the moving record underneath, and is retained so by the horizontal member 56<1> of the T-shaped lever 56, 56<1>, 56<11>, engaging the stud 55. As the second record rotates, a projection 77 secured to its turntable 19 rotates a star-wheel 76 having one or more longer teeth 76<1> at the lower end of an arm 75 depending from a counterweighted arm 73, until, when the longer tooth 76<1> engages with the projection 77, the star-wheel 76 is forced outwards and thus rocks a cross-lever 66, which is connected by levers 68, 69, 71 to a connecting-rod 60 and lowers the sound-box into the record. The roller 16 on the radial arm 15 carrying the fresh record will now have raised and passed underneath a latch 46 pivoted to a projection from the casing 1, a blade-spring 52 preventing too rapid a motion, and will now rest upon a fixed roller 51 and against the roller 49 on the twoarmed lever 48.