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Patent US4488151A successfully refreshed from Google Patents.
US4488151A
Expired / Lapsed
US
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Arbiter switch for a concurrent network of processors
Assignee: Unisys Corp
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Filing: 1981-12-10
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Granted: 1984-12-11
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Expires: 2001-12-10
Abstract
Abstract Disclosed is an arbiter switch for use in forming an asynchronous network of concurrent processors where the arbiter switch receives a message from one of two input ports and transmits it to its output port. A path through the network which has been established can be cleared should it become apparent that particular path has become locked in due to a malfunction of a component in one of the nodes or switches in the network.
Inventors
- 👤 Brent C. Bolton
- 👤 Gary L. Logsdon
- 👤 Carl F. Hagenmaier, Jr.
- 👤 Jesse R. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:14
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/16; G06F15/163; G06F15/173; G06F15/17356; G06F15/17368; G06F15/17375; B; B61; B61B; B61B12/00; B61B12/007; G06F13/00; G06F13/14; G06F13/38; G06F13/40; G06F13/4004; G06F13/4022; G06F15/76; G06F15/80
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
144 words
An arbitration switch for receiving digital data signals and a clear signal from two different sources in a digital communication network and transmitting those signals to a designation, said switch comprising: a pair of input ports one for each of said two different sources to receive said digital data signals and said clear signal from each of said two different sources; an arbitration circuit means coupled to said input ports to receive said digital data signals and to select the first set of data signals to be received for subsequent transmission to said destination; and clear circuit means to receive a clear signal from one of said two different sources by way of one of said input ports, said clear circuit means being coupled to said input ports and to said arbitration circuit means to reset said input ports and said arbitration circuit means.
Claim 2
Dependent Claim
144 words
An arbitration switch for receiving digital data signals and a clear signal from two different sources in a digital communication network and transmitting those signals to a designation, said switch comprising: a pair of input ports one for each of said two different sources to receive said digital data signals and said clear signal from each of said two different sources; an arbitration circuit means coupled to said input ports to receive said digital data signals and to select the first set of data signals to be received for subsequent transmission to said destination; and clear circuit means to receive a clear signal from one of said two different sources by way of one of said input ports, said clear circuit means being coupled to said input ports and to said arbitration circuit means to reset said input ports and said arbitration circuit means.
Claim 3
Dependent Claim
50 words
An arbitration switch according to claim 1 further including: an output port coupled to each of said input ports and to said selection means to receive data signals and said clear signal from the input port selected by said selection circuit means and to transmit said signals to said destination.
Claim 4
Dependent Claim
52 words
An arbitration switch according to claim 1 wherein: said input ports and said output port include consensus gate means having a plurality of inputs and an output, said consensus gate means changing its output from one state to the other only when all of its inputs have changed to said other state.
Claim 5
Dependent Claim
32 words
An arbitration switch according to claim 3 wherein: said consensus gate means include latch circuits which retain their previous state until such time as all the inputs have changed to another state.
Claim 6
Dependent Claim
27 words
An arbitration switch according to claim 4 wherein: said input port consensus gate means are adapted to respond to a signal transition from one state to another.
Claim 7
Dependent Claim
168 words
An arbitration switch for receiving digital data signals and a clear signal from two different sources in a digital communication network and transmitting those signals to a destination, said switch comprising: a pair of input ports one for each of said two different sources to receive said digital data signals and said clear signal from each of said two different sources; an arbitration circuit means coupled to said input ports to receive said digital data signals and to select the first set of data signals to be received for subsequent transmission to said destination; clear circuit means to receive a clear signal from one of said two different sources by way of one of said input ports, said clear circuit means being coupled to said input ports and to said arbitration circuit means to reset said input ports and said arbitration circuit means; and clear acknowledgment means coupled to said sources and adapted to signal a source sending a clear signal that the clear signal has been received.
Claim 8
Dependent Claim
168 words
An arbitration switch for receiving digital data signals and a clear signal from two different sources in a digital communication network and transmitting those signals to a destination, said switch comprising: a pair of input ports one for each of said two different sources to receive said digital data signals and said clear signal from each of said two different sources; an arbitration circuit means coupled to said input ports to receive said digital data signals and to select the first set of data signals to be received for subsequent transmission to said destination; clear circuit means to receive a clear signal from one of said two different sources by way of one of said input ports, said clear circuit means being coupled to said input ports and to said arbitration circuit means to reset said input ports and said arbitration circuit means; and clear acknowledgment means coupled to said sources and adapted to signal a source sending a clear signal that the clear signal has been received.
Claim 9
Dependent Claim
50 words
An arbitration switch according to claim 6 further including: an output port coupled to each of said input ports and to said selection means to receive data signals and said clear signal from the input port selected by said selection circuit means and to transmit said signals to said destination.
Claim 10
Dependent Claim
52 words
An arbitration switch according to claim 6 wherein: said input ports and said output port include consensus gate means having a plurality of inputs and an output, said consensus gate means changing its output from one state to the other only when all of its inputs have changed to said other state.
Claim 11
Dependent Claim
32 words
An arbitration switch according to claim 8 wherein: said consensus gate means include latch circuits which retain their previous state until such time as all the inputs have changed to another state.
Claim 12
Dependent Claim
27 words
An arbitration switch according to claim 9 wherein: said input port consensus gate means are adapted to respond to a signal transition from one state to another.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |