公开(公告)号：US3555199A

公开(公告)日：1971-01-12

申请号：US3555199D

申请日：1968-10-01

Applicant: BELL TELEPHONE LABOR INC

Inventor： EUBANK CAROL H ,  MILLER DANIEL L

IPC: H04M1/27 ,  H04M1/66

CPC classification number: H04M1/27

Abstract: A telephone in which the closure of the hookswitch energizes a relay that seizes the telephone line and initiates the operation of a sequential switching means if the sequential switching means is in the first of three rest positions. The operated sequential switching means advances to the second rest position wherein an automatic dial may be activated to call a single preselected telephone number and the activation of the dial advances the sequential switching means to the third rest position. The opening of the hookswitch at any time deenergizes the relay to drop the telephone line and returns the sequential switching means to the first rest position.

公开(公告)号：US3541277A

公开(公告)日：1970-11-17

申请号：US3541277D

申请日：1968-05-28

Applicant: BELL TELEPHONE LABOR INC

Inventor： MILLER DANIEL L ,  PRINCE TERRY B

IPC: H01H41/00 ,  G06F3/02 ,  G06K7/04 ,  H01H43/08

CPC classification number: G06K7/04