Patent US2790894A successfully refreshed from Google Patents.
US3553528A
Expired / Lapsed
US
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Light flashing circuit
Assignee: Unisys Corp
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Filing: 1968-08-14
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Granted: 1971-01-05
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Expires: 1988-08-14
Abstract
Abstract A light flashing circuit comprising a plurality of lamps to be turned on sequentially, each lamp being adapted to turn on at a different potential, with the various potentials being provided sequentially and repetitively in the circuit so that the sequence of flashing lights can be repeated as desired.
Inventors
- 👤 Arpad Somlyody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:12
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/34; B60Q1/38; B60Q1/381
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
150 words
A lamp flashing circuit comprising: a first series of lamps including first, second, and third lamps; a second series of lamps including fourth, fifth, and sixth lamps; said first and fourth lamps being connected as a first pair to a first current flow path which includes a first switch; said second and fifth lamps being connected as a second pair to a second current flow path which includes a second switch; said third and sixth lamps being connected as a third pair to a third current flow path which includes a third switch; means for turning each switch on at a different electrical potential; means coupled to said switches for providing the electrical potentials for sequentially turning on said switches and either series of said lamps; and turn-off means coupled to said last-named means for simultaneously removing said potentials and for turning off all of said switches and said lamps.
Claim 2
Dependent Claim
150 words
A lamp flashing circuit comprising: a first series of lamps including first, second, and third lamps; a second series of lamps including fourth, fifth, and sixth lamps; said first and fourth lamps being connected as a first pair to a first current flow path which includes a first switch; said second and fifth lamps being connected as a second pair to a second current flow path which includes a second switch; said third and sixth lamps being connected as a third pair to a third current flow path which includes a third switch; means for turning each switch on at a different electrical potential; means coupled to said switches for providing the electrical potentials for sequentially turning on said switches and either series of said lamps; and turn-off means coupled to said last-named means for simultaneously removing said potentials and for turning off all of said switches and said lamps.
Claim 3
Dependent Claim
16 words
Circuit defined in claim 1 wherein said last-named means comprises a capacitor and charging circuit therefor.
Claim 4
Dependent Claim
68 words
Circuit defined in claim 1 wherein said last-named means comprises a capacitor and charging circuit therefor, and said turn-off switch means comprises a transistor which is coupled to and discharges said capacitor when it turns on, said turn-off switch means being turned on when the capacitor reaches the proper charge level, the turn-on of said switch means discharging said capacitor and turning off said switches and said lamps.
Claim 5
Dependent Claim
89 words
A lamp flashing circuit comprising: a plurality of lamps each having its own current flow path including semiconductor switching means; each of said switching means being responsive to a different electrical potential for turning on its lamp; electronic means for sequentially activating said switching means; said activating means including means for providing said different electrical potentials to said switching means; and means coupled to said activating means for simultaneously removing said electrical potentials from each of said switching means thereby turning off said plurality of switching means and lamps.
Claim 6
Dependent Claim
89 words
A lamp flashing circuit comprising: a plurality of lamps each having its own current flow path including semiconductor switching means; each of said switching means being responsive to a different electrical potential for turning on its lamp; electronic means for sequentially activating said switching means; said activating means including means for providing said different electrical potentials to said switching means; and means coupled to said activating means for simultaneously removing said electrical potentials from each of said switching means thereby turning off said plurality of switching means and lamps.
Claim 7
Dependent Claim
29 words
The circuit of claim 4 wherein said potential removing means includes a timing circuit for removing said electrical potentials only after each of said switching means has been activated.
Claim 8
Dependent Claim
22 words
The circuit of claim 5 wherein said timing circuit is automatically reset for permitting said activating means to reactivate said switching means.
Claim 9
Dependent Claim
51 words
The circuit of claim 4 including a plurality of selectable groups, each of said groups including a said plurality of lamps, each with its own current flow path and wherein respective lamps in each of said groups utilize the semiconductor switching means, electronic activating means and potential removing means in common.
Claim 10
Dependent Claim
29 words
The circuit of claim 7 wherein said potential removing means includes a timing circuit for removing said electrical potentials only after each of said switching means has been activated.
Claim 11
Dependent Claim
22 words
The circuit of claim 8 wherein said timing circuit is automatically reset for permitting said activating means to activate said switching means.
References Cited (Backward Citations)
GB905627A
Cited
US3113293A
Cited
US3240989A
Cited
US3263119A
Cited
US3391304A
Cited
US3313981A
Cited
US3376472A
Cited
US3421049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |