Patent GB-300814-A (GB)
Title: Improvements in and connected with talking machines
IPC: G11B17/16
Filed: 1927-12-19
Abstract: 300,814. Waterworth, E. N. Dec. 19, 1927. Multiple machines, mechanical. - The invention relates to a modification of the magazine gramophone described in Specification 281,003 wherein a stack of record is threaded on an inclined spindle mounted on the top of the turntable spindle and rests in inclined position with the periphery of the lowest record on a support which can be oscillated to allow the bottom record to fall on to the turntable and can be adjusted for supporting records of different sizes, and wherein provision is made for lifting and returning the tone-arm to starting position and resetting it on a new record or for repeating, the operations being effected from a pivoted main lever oscillated by the motor of the machine. According to the, present invention, the adjustment or setting of the support, for the periphery of the stack to suit records of a certain diameter automatically sets other mechanism required to co-ordinate therewith for positioning the tonearm to start playing, and provision is also made for repeating any record once by setting a control knob which also provides for repeating any record indefinitely, for switching in the driving motor, and for stopping the machine when the last record of the stack has been played, and switching out the motor. The inclined spindle 91 carrying the adjustable support 87 for the periphery of the stack of records has fixed to its lower end a disc 94 connected by link 117 with a pivoted bell crank 80 on the main lever 52, which is pivoted at its lower end and oscillated at the completion of a record to lift, reiturn and reset the tone-arm, as described in Specification 281,003. The bell crank 80 is connected by link 79 with a pivoted bell crank 77 having two curved surfaces 118, 119 of different radius and, according to the setting of the support 87 for say 10 inch or 12 inch records, one or other of the surfaces 118, 119 controls a cam pivoted on the free end of the lever 52, so that in the action of the mechanism 52, 58, 60, 65 and plate. 120 fixed to the tone-arm for lifting, returning and resetting the tone-arm, as described in the prior Specification, the cam escapes past the stud 121 to leave the stylus in correct starting position for that size of record in the stack. In the set position of the record support 87, according to the size of record stacked thereon, one of two diametrically opposite notches in the disc 94 engages a projection on a lever 97 pivoted below, which lever is rocked from the lever 52, to release the bottom record, by rod 98, rock lever 100 and a lever 101 pivoted thereto and having a hook 101<a>. To provide for single playing and for repetition of a record, a control knob 31 carrying a dial and a cam 127 is linked to a notched quadrant 36 with notches for successive engagement by a part 34 as described in Specification 281,003. The dial has markings 1, 2 - - 9, and 2, 4 - - 18, each series corresponding to the successive records starting from the bottom of the stack, and it also has a mark O and a marks * ; any marking can be brought opposite to the fixed arrow 128<1>. When set in the positien shown, the machine will play singly the three records from the bottom of the stack and then stop. This action is effected through the cam 127 engaging a pivoted lever 128 bearing against a rock bar 104 to retain it in inoperative position so that a record is released to the turntable after each playing. If the dial is turned to bring one of the markings 2, 4 - - 18 opposite to the arrow, the bar 104 is rocked by the cam 127 and lever 128 to bring a pin 103 on the bar 104 into the path of a lug 108 or the, lever 101, the movement of which with the lever 100 engages the pin 103 with the latch 111 of a lever 109 on a fixed pivot. On return movement of the levers 100, 101, a part 106 of lever 101 comes against the pin 103 now held by the latch and the lever 101 is thereby rocked and disengages the pawl 101<a> from the lever 97. On the next swing of the lever 100, the support 87 will not now be rocked to release another record on to the turntable and the position of the bar 104 prevents the lever 114, 34 from moving into engagement with the notched plate 36 and the. setting dial with markings corresponding to the records is not therefore moved. At the end of the swing of lever 100, the end 107 of lever 101 rocks the latch lever 109 to release the pin 103 and permit the bar 104 to be returned by a spring against the lever 128 so that another record will be released at the next swing of the lever 100. Any record may be repeated indefinitely by manually drawing down the rod 105, or by bringing the star on the dial opposite tha arrow which positions the quadrant 36, so that there is no notch opposite to the pawl of the lever 114. The driving motor may be started or stopped by turning the knob 31 to rock a lever 35 for making or breaking a circuit 38, the circuit being broken when the mark zero on the. dial is brought opposite to the arrow.