US5539389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enhanced group addressing system
Assignee: Pittway Corp
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Filing: 1994-05-23
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Granted: 1996-07-23
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Expires: 2014-05-23
Abstract
Abstract An apparatus and a method for addressing a plurality of spaced-apart detectors or control units in a multiple zone detection system shortens the time needed for a centrally located control element to communicate with the detectors or units. The control element addresses a plurality of units simultaneously by means of a serial bidirectional communications line. Information can be transmitted time serially to each of the addressed units which is associated with a respective time interval. The addressed units can return, time serially, on the serial communication line a plurality of indicia. The control element associates each indicium with a respective detector by means of the indicium's position relative to other returned indicia.
Inventors
- 👤 Eugene Bystrak
- 👤 Andrew Berezowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:07
CPC Classifications
G; G08; G08B; G08B26/00; G08B26/001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A communications system wherein variable length information sequences can be exchanged between a control element and a plurality of units comprising: a control element; a plurality of units at least some of which are displaced from said control element; a common bidirectional communications member coupled between said element and said units; circuitry, carried by said control element for producing a unit group and command specifying communication; and wherein said element includes transmission/reception circuitry for exchanging the information using said communications member, wherein an interval is provided and wherein one or more units in said group can communicate with said control element during respective, non-overlapping portions of said interval wherein at least one of said units includes an output device capable of receiving variable number of bytes from said control element.
Claim 2
Dependent Claim
130 words
A communications system wherein variable length information sequences can be exchanged between a control element and a plurality of units comprising: a control element; a plurality of units at least some of which are displaced from said control element; a common bidirectional communications member coupled between said element and said units; circuitry, carried by said control element for producing a unit group and command specifying communication; and wherein said element includes transmission/reception circuitry for exchanging the information using said communications member, wherein an interval is provided and wherein one or more units in said group can communicate with said control element during respective, non-overlapping portions of said interval wherein at least one of said units includes an output device capable of receiving variable number of bytes from said control element.
Claim 3
Dependent Claim
13 words
A system as in claim 1 wherein said output device includes a printer.
Claim 4
Dependent Claim
58 words
A system as in claim 1 wherein first and second different units in said group include circuitry for transmitting information to said element wherein said first unit transmits information of a first length to said element, said second unit transmits information of a second length to said element and wherein said first and said second lengths are different.
Claim 5
Dependent Claim
14 words
A system as in claim 3 wherein said communications member includes an electrical cable.
Claim 6
Dependent Claim
127 words
A communications system wherein variable length information sequences can be exchanged between a control element and a plurality of units comprising: a control element; a plurality of units at least some of which are displaced from said control element; a common bidirectional communications member coupled between said element and said units; circuitry, carried by said control element for producing a unit group and command specifying communication; and wherein said element includes transmission/reception circuitry for exchanging the information using said communications member, wherein an interval is provided and wherein one or more units in said group can communicate with said control element during respective, non-overlapping portions of said interval wherein at least one of said units is capable of receiving variable number of bytes from said control element.
Claim 7
Dependent Claim
127 words
A communications system wherein variable length information sequences can be exchanged between a control element and a plurality of units comprising: a control element; a plurality of units at least some of which are displaced from said control element; a common bidirectional communications member coupled between said element and said units; circuitry, carried by said control element for producing a unit group and command specifying communication; and wherein said element includes transmission/reception circuitry for exchanging the information using said communications member, wherein an interval is provided and wherein one or more units in said group can communicate with said control element during respective, non-overlapping portions of said interval wherein at least one of said units is capable of receiving variable number of bytes from said control element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-23 | 2000-01-22 | 2000-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-23 | 2004-01-22 | 2004-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-23 | 2008-01-22 | 2008-07-23 | $7700.00 | Window Closed / Lapsed |