发明名称 Simplified phonograph capable of selecting desired grooves on a record disc
摘要 A plurality of record grooves (2) are formed on a record disc (3) starting point (4). The grooves are positioned at radially different points of the record disc. When a pickup (6) is returned to each starting point (4) of the record groove (2) by means of a return spring (7) acting on a tone arm (8), the pickup (6) is positioned so as to be able to select one of the starting points of the record grooves. The selected groove corresponds to the planar position of this device, i.e., whether vertical or horizontal. The pickup 6 is positioned by means of a movable stopper 9 (a) correlated with a weight means (10). An upright concentric cam (20) is provided near the center of the record disc (3) for releasing the record disc (3) from a stylus force applied thereto. This enables a sound transmitting member (22), which urges the pickup toward the record disc in playing, to be raised up and released from the stylus force when the pickup reaches the end or terminal point of sound reproduction. An inclined face of the cam, for lowering the swingable arm (13), subsequent to its initial raising up motion, is positioned at a point prior to the starting points of the record grooves, namely, in such a manner that the pickup is depressed onto the record disc prior to the arrival of the starting points at the position of the device where said pickup is lowered.
申请公布号 US4234193(A) 申请公布日期 1980.11.18
申请号 US19790043319 申请日期 1979.05.29
申请人 OZEN CORPORATION 发明人 SHISEKI, YUTAKA
分类号 A63H5/00;G11B3/00;G11B33/06;(IPC1-7):G11B3/08;G11B17/06 主分类号 A63H5/00
代理机构 代理人
主权项
地址