Patent GB-190411855-A (GB)
Title: Improvements in Sound Reproducing Machines.
Inventor: WELLNER JULIUS
Filed: 1904-05-24
Granted: 1904-06-30
Abstract: 11,855. Wellner, J. May 24. Phonographs &c.-Relates to talking-machines in which the old stylus is removed from its support after the reproduction of a piece and a new stylus inserted automatically and the parts returned to their original position. The record 8, Fig. 2, is mounted on the table 4 and driven from the clockwork 34 through gearing 32, 33. The stylus 2 is contained in an opening 17, Fig. 5, in the arm 15 extending from the diaphragm 16 of the sound box 1, and is held in position in a notch 19 in the pin 18. To start the machine, a bar 59, Fig. 2, is pulled, which moves a lever 25 against the action of a spring away from the head of the pin 18 ; the lever 25 is held back by a hook on a lever attached to the sound box 1 and having a long arm 30 extending beneath the record disc, which falls by its own weight. When pulled out to its full extent, a slot in the arm 59 draws a pin and retracts a plunger 85, Fig. 5, which transfers a stylus 2 from the magazine holder 81 into position in the end 15. The motion of the bar also causes the shaft 56, Figs. 7 and 10, to rock and disengage the roller 54 from a notch 97 in the cam 44. The latter cam is mounted on the shaft 40 with a worm-wheel 39 driven through the pulleys 35, 36, Fig. 2, and the worm 38. Upon releasing the bar 59, the spring 57 moves the roller 54 against the notch 98, and a cam-groove in the latch lever 42 pivoted on the hub of the worm-wheel 39 engages an arm 48, moving its notch 45 from engagement with the projection 46 on the shaft 40 and leaving the latter idle while the worm wheel is turned through a complete revolution ; the turntable is thus allowed to acquire the desired speed before engaging the stylus 2. On completing the revolution, the spring 43 causes the lever 42 to ride over and engage its notch 45 with the projection 46, and, by means of a cam on the end of the shaft 40, the lever 79, Fig, 2, brings the stylus into position over the outside circle on the record. Also, the crank arm 60, Fig. 7, is made to lower the bar 62, to cause a projection 82 to engage the arm 64 by friction, and to turn the shaft 65 until the arm 67 carried thereby moves the soundbox 1 to engage the stylus with the record. The roller 54 is now in engagement with the notch 99 on the cam 44 and prevents further rotation of the shaft 40. The groove of the lever 42 engages the free end of the arm 50, Fig. 7, and rocks the lever to disengage its notch 45, Fig. 10, from the projection 46 and consequently the shaft 40 from the worm-wheel 39. The arm 50 is thus rocked backwards and forwards during the playing, and each time is returned by the bent arm 75. When the stylus has arrived at the inner circle of the record disc, the arm 50 is moved to one side by the groove of the lever 42 but is not returned to its normal position, so that the notch 45 engages the projection 46 and the crank arm 60 is rotated to raise the arm 64, the rod 66, and arms 67, 70, and the stylus is raised from the record. At the same time, the long arm 30 is raised and releases the lever 25, thus depressing the pin 18 and freeing the stylus 2, which is ejected by the light spring 23, Fig. 5. The arm 67 and soundbox 1 are also simultaneously returned into position by the action of a shoulder piece on the bar 62, Fig. 7, and the roller 54 again engages the notch 97 of the cam 44. The shaft 56 then causes the arm 58 to move the bar 59 outwards to its original position, and the spring shown in Fig. 5 forces the plunger 85 towards the soundbox, automatically inserting another stylus from the magazine 81.