Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1976-03-09
1977-04-05
Stewart, David L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340147R, 3401725, H04Q 1104, H04Q 304
Patent
active
040163695
ABSTRACT:
An addressing arrangement is disclosed for systems in which communication is required between a main device and a plurality of associate devices. In the arrangement, access messages are used corresponding to states of shift register sequences. When the main device issues an access message, each associate device transforms the received access message to another access message which is applied to a subsequent associate device. The transformation of access messages allows the associate devices to be identical to each other and respond to the same predetermined access message since each device is uniquely identified by its location in the system. Each associate device also has the capability of being accessed by a prescribed access message which is not transformed by the associate device as it propagates through the system. Variation of the extent and the direction of transformation in another arrangement provides a means of uniquely identifying the source of information transmitted from an associate device to the main device.
REFERENCES:
patent: 3643030 (1972-02-01), Sparrendahl
patent: 3652993 (1972-03-01), Bridwell
patent: 3952162 (1976-04-01), Texier
Communications of the ACM; vol. 2, No. 10; Oct. 1959 "Shift Register Code for Indexing Applications" pp. 40-43.
Bell Telephone Laboratories Incorporated
Moran John Francis
Stewart David L.
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