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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
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.
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公开(公告)号：US3555200A
公开(公告)日：1971-01-12
申请号：US3555200D
申请日：1968-10-01
Applicant: BELL TELEPHONE LABOR INC
Inventor： EUBANK CAROL H
CPC classification number: H04M1/27
Abstract: A telephone in which the closure of the switchhook seizes the telephone line and energizes a pair of relays that initiate the operation of sequential switching means if the sequential switching means is in the first of three reference positions. The operated sequential switching means advances to the second reference position wherein the speech transmitter and the hookswitch are disabled and call initiating means are enabled. The call initiating means causes an automatic dial to call a preselected telephone number and at the same time advances the sequential switching means to the third reference position. In this position the speech transmitter and hookswitch are enabled so as to permit conversation with the called station and the dropping of the telephone line when the conversation is completed. The opening of the enabled hookswitch deenergizes the pair of relays, which returns the sequential switching means to the first reference position.
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