US3611295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flip-flop display and manual control for bus organized computer
Assignee: Unisys Corp
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Filing: 1969-08-04
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Granted: 1971-10-05
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Expires: 1989-08-04
Abstract
Abstract In a computer a plurality of flip-flops are connected to a common source bus and to a common destination bus. A combined display and manual control circuit is connected to the source bus and the destination bus in such a manner that the state of one of the flip-flops can be displayed and manually controlled as selected by an addressing means. In particular, means are provided for displaying a selected flip-flop and maintaining the state of that flip-flop, with logical provisions for manually over-riding the existing state and either setting or clearing the selected flip-flop, all with only a pair of leads between the combined circuit and the matrix of flip-flops.
Inventors
- 👤 Richard S Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:11
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/30; G06F11/32; G06F11/324; G06F11/325
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
96 words
A plurality of flip-flops: a common source bus selectively connectable to the outputs of the plurality of flip-flops; a common destination bus selectively connectable to the inputs of the plurality of flip-flops; address means for selecting one of the flip-flops for connection to the source bus and to the destination bus; display means connected to the source bus for displaying the state of the selected flip-flop and connected to the destination bus for maintaining the state of the flip-flop; and control means connected to the destination bus for selectively manually setting and clearing the selected flip-flop.
Claim 2
Dependent Claim
96 words
A plurality of flip-flops: a common source bus selectively connectable to the outputs of the plurality of flip-flops; a common destination bus selectively connectable to the inputs of the plurality of flip-flops; address means for selecting one of the flip-flops for connection to the source bus and to the destination bus; display means connected to the source bus for displaying the state of the selected flip-flop and connected to the destination bus for maintaining the state of the flip-flop; and control means connected to the destination bus for selectively manually setting and clearing the selected flip-flop.
Claim 3
Dependent Claim
87 words
A combination as defined in claim 1 wherein the display means comprises: an indicator connected to the source bus; a destination AND gate having the source bus as an input; means for applying a display enable signal as another input to the destination AND gate; and means for connecting the output of the destination AND gate to the destination bus so that the state of the selected flip-flop applied to the source bus is applied to the selected flip-flop input for maintaining the state of the flip-flop.
Claim 4
Dependent Claim
84 words
A combination as defined in claim 2 wherein the control means comprises: an OR gate connected to the destination AND gate input from the source bus; a control AND gate having its output connected to the OR gate; means for normally applying a first true signal to the control AND gate; and means for manually applying a second true signal to the control AND gate, whereby a true signal is applied to the destination AND gate regardless of the state of the selected flip-flop.
Claim 5
Dependent Claim
96 words
A combination as defined in claim 3 wherein said control means further comprises: a source AND gate interposed between the source bus and the destination AND gate; means for applying a normally true signal to an input to the source AND gate so that the output thereof normally is the same as the state of the selected flip-flop; and means for manually removing the normally true signal from the input to the source AND gate so that the output thereof is false for blocking the state of the selected flip-flop from affecting the destination AND gate.
Claim 6
Dependent Claim
75 words
A combination as defined in claim 4 wherein said control means further comprises: means for manually removing the first true signal to the control AND gate, whereby the output thereof is false; both of said means for manually removing being separately and simultaneously operable whereby, upon simultaneous operation of both means for manually removing, a false signal is applied to the input of the destination AND gate regardless of the state of the selected flip-flop.
Claim 7
Dependent Claim
119 words
A combination as defined in claim 1 wherein the control means comprises: a source AND gate, the source bus being connected as an input to the source AND gate; an inverting amplifier, the output of the inverting amplifier being connected as an input to the source AND gate; a normally open pushbutton connected to the input of the inverting amplifier, and normally connected to the output of the source AND gate; normally true lead connected to the normally open pushbutton; a destination AND gate having an input connected to the output of the source AND gate, and an output connected to the destination bus; and a display mode enable lead connected as an input to the destination AND gate.
Claim 8
Dependent Claim
74 words
A combination as defined in claim 6 wherein the control means further comprises a control AND gate interposed between the normally open pushbutton and the input to the destination AND gate so as to have the normally open pushbutton as an input, and the destination AND gate as the output; a normally closed pushbutton connected to another input to the control AND gate; and a normally true lead connected to the normally closed pushbutton.
Claim 9
Dependent Claim
76 words
In a flip-flop matrix having a source bus common to a plurality of flip-flops, a destination bus common to the plurality of flip-flops, and means for selectively addressing an individual flip-flop, the improvement comprising; a combined flip-flop display and manual control unit connected to the flip-flops only by way of the common source bus and the common destination bus for displaying an addressed flip-flop in the matrix and selectively manually setting and clearing the addressed flip-flop.
Claim 10
Dependent Claim
76 words
In a flip-flop matrix having a source bus common to a plurality of flip-flops, a destination bus common to the plurality of flip-flops, and means for selectively addressing an individual flip-flop, the improvement comprising; a combined flip-flop display and manual control unit connected to the flip-flops only by way of the common source bus and the common destination bus for displaying an addressed flip-flop in the matrix and selectively manually setting and clearing the addressed flip-flop.
Claim 11
Dependent Claim
84 words
A combined unit as defined in claim 8 comprising: an indicator connected to the source bus; a destination AND gate having the source bus as an input; means for applying a display enable signal as another input to the destination AND gate; and means for connecting the output of the destination AND gate to the destination bus so that the state of the selected flip-flop applied to the source bus is applied to the destination bus for maintaining the state of the selected flip-flop.
Claim 12
Dependent Claim
82 words
A combined unit as defined in claim 9 further comprising: an OR gate connected to the destination AND gate input from the source bus; a control AND gate having its output connected to the OR gate; means for normally applying a first true signal to the control AND gate; and means for manually applying a second true signal to the control AND gate whereby a true signal is applied to the destination AND gate regardless of the state of the selected flip-flop.
Claim 13
Dependent Claim
96 words
A combination as defined in claim 10 wherein the combined unit further comprises: a source AND gate interposed between the source bus and the destination AND gate; means for applying a normally true signal to an input to the source AND gate so that the output thereof normally is the same as the state of the selected flip-flop; and means for manually removing the normally true signal from the input to the source AND gate so that the output thereof is false for blocking the state of the selected flip-flop from affecting the destination AND gate.
Claim 14
Dependent Claim
72 words
A combined unit as defined in claim 11 further comprising: means for manually removing the first true signal to the control AND gate, whereby the output thereof is false; both of said means for manually removing being separately and simultaneously operable whereby, upon simultaneous operation of both means for manually removing, a false signal is applied to the input of the destination AND gate regardless of the state of the selected flip-flop.
Claim 15
Dependent Claim
121 words
A combination as defined in claim 8 wherein the control means comprises: a source AND gate, the source bus being connected as an input to the source AND gate; an inverting amplifier, the output of the inverting amplifier being connected as an input to the source AND gate; a normally open pushbutton connected to the input of the inverting amplifier, and normally connected to the output of the source AND gate; a normally true lead connected to the normally open push button; a destination AND gate having an input connected to the output of the source AND gate, and an output connected to the destination bus; and a display mode enable lead connected as an input to the destination AND gate.
Claim 16
Dependent Claim
73 words
A combination as defined in claim 13 wherein the control means comprises: a control AND gate interposed between the normally open pushbutton and the input to the destination AND gate so as to have the normally open pushbutton as an input, and the destination AND gate as the output; a normally closed pushbutton connected to another input to the control AND gate; and a normally true lead connected to the normally closed pushbutton.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |