公开(公告)号：US3288941A

公开(公告)日：1966-11-29

申请号：US33421063

申请日：1963-12-30

Applicant: IBM

Inventor： LANGENDORF MATTHEW P ,  WEST LLOYD E

IPC: H04M11/10

CPC classification number: H04M11/10

公开(公告)号：US3222460A

公开(公告)日：1965-12-07

申请号：US21626162

申请日：1962-08-10

Applicant: IBM

Inventor： ALBANES NICHOLAS J ,  LANGENDORF MATTHEW P

IPC: H04M1/64 ,  H04M11/10

CPC classification number: H04M1/64 ,  H04M11/10

公开(公告)号：US3691300A

公开(公告)日：1972-09-12

申请号：US3691300D

申请日：1965-06-30

Applicant: IBM

Inventor： LANGENDORF MATTHEW P

IPC: H04M11/10 ,  G11B19/02

CPC classification number: H04M11/10

Abstract: The invention relates to tone control arrangements for dictating apparatus using mechanical reed generators and transistor-reed relay circuits. The apparatus has a central dictation unit with an associated control unit. The generators are operated by the dictator to generate tone signals of predetermined frequency which are then transmitted and recognized by the control unit in order to control the action of the dictating apparatus.

公开(公告)号：US3011030A

公开(公告)日：1961-11-28

申请号：US68163257

申请日：1957-09-03

Applicant: IBM

Inventor： LANGENDORF MATTHEW P

IPC: G11B15/18 ,  G11B27/36

CPC classification number: G11B27/36 ,  G11B15/1808

公开(公告)号：US3647985A

公开(公告)日：1972-03-07

申请号：US3647985D

申请日：1970-06-22

Applicant: IBM

Inventor： LANGENDORF MATTHEW P ,  RIDINGS CHARLES L

IPC: G11B21/12 ,  H04M1/64

CPC classification number: H04M11/10

Abstract: The invention concerns dictation systems having facilities for selectively connecting remote stations to a central recording unit, and recognizing control tones generated at a connected remote station to effect all operations required including recording and playback of audio (voice) signals. The systems include, in several versions, circuits responsive to presence or absence of voice signals to start and stop the recording unit (respectively), an intermediate voice buffer to prevent loss of voice signals during startup time and features circuitry to insure that control tones are recognized properly, but not recorded on the media in the central recording unit.

Abstract translation: 本发明涉及具有用于将远程站选择性地连接到中央记录单元的设备的听写系统，以及识别在连接的远程站产生的控制音调以实现所需的所有操作，包括音频（语音）信号的记录和回放。 该系统在几个版本中包括响应于存在或不存在语音信号的电路来分别启动和停止记录单元（分别），中间语音缓冲器，以防止在启动时间期间语音信号的丢失，并且具有确保控制音调的电路 正确地识别，但不记录在中央记录单元的介质上。

公开(公告)号：US3549821A

公开(公告)日：1970-12-22

申请号：US3549821D

申请日：1968-06-17

Applicant: IBM

Inventor： LANGENDORF MATTHEW P ,  RIDINGS CHARLES L

IPC: H04M11/10 ,  G11B21/12 ,  H04M1/64

CPC classification number: H04M11/10

公开(公告)号：US3539829A

公开(公告)日：1970-11-10

申请号：US3539829D

申请日：1968-07-17

Applicant: IBM

Inventor： LANGENDORF MATTHEW P ,  SEBASTIAN WILLIAM H

IPC: H03H11/12 ,  H03K1/16

CPC classification number: H03H11/1213

公开(公告)号：US3524026A

公开(公告)日：1970-08-11

申请号：US3524026D

申请日：1968-06-17

Applicant: IBM

Inventor： LANGENDORF MATTHEW P ,  RIDINGS CHARLES L ,  SEBASTIAN WILLIAM H

IPC: G11B15/02 ,  G11B5/00 ,  G11B5/02 ,  H04M11/10 ,  G11B19/02 ,  G11B27/02

CPC classification number: H04M11/10

公开(公告)号：CA749066A

公开(公告)日：1966-12-20

申请号：CA749066D

Applicant: IBM

Inventor： LANGENDORF MATTHEW P ,  ALBANES NICHOLAS J

公开(公告)号：CA778494A

公开(公告)日：1968-02-13

申请号：CA778494D

Applicant: IBM

Inventor： WEST LLOYD E ,  LANGENDORF MATTHEW P