The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 1980
Filed:
Feb. 21, 1979
Sava Jacobson, Van Nuys, CA (US);
Other;
Abstract
In this telephone answering device, the outgoing and incoming audio amplifiers are interconnected to function as a mode switching flip-flop. Remote playout is enabled upon detection of a first beep tone. This sets a control flip-flop which consists of a single operational amplifier interconnected with a steering capacitor to function as a toggleable bistable circuit. A cylindrical cam mechanism and associated control circuit are actuated by setting of the remote playout control flip-flop. These cooperate with a reel drive motor first to rewind the message tape and then to drive it forward as the recorded messages are played out via the telephone line to the user. Detection of a second beep tone resets the control flip-flop, terminating remote playout. The device employs a single sided solid state ring detector having a transformer input circuit that presents a balanced load to the telephone line, thereby permitting ac powered operation of the device.