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:
Jun. 01, 1976
Filed:
Mar. 21, 1975
Robert Lawrence Carbrey, Boulder, CO (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A line switch controller for time division telephone switching systems incorporates the function of a time slot assignment memory. Time slots are defined by the repetitive numerical sequence produced by a local time slot counter in enumerating clock pulses. Line switch closures effecting the connection of parties via a time division bus are performed in response to the attainment of a predetermined count in presettable control counters each dedicated to a different line switch and enumerating clock pulses up to the same maximum enumeration of the time slot counter. Repetitive closure of a line switch in a particular time slot is achieved by setting the corresponding control counter to the predetermined count in that time slot. Quick access to time slot assignment information is attained through the inclusion of a binary multibit subtractor to take the difference between the time slot counter enumeration and the enumeration of a selected control counter. This difference corresponds to the time slot assignment of the party connected to the line switch which the selected control counter controls.