Patent US4751399A successfully refreshed from Google Patents.
US4751399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic lighting device
Assignee: HIMONAS JILL S
•
Filing: 1986-12-11
•
Granted: 1988-06-14
•
Expires: 2006-12-11
Abstract
Abstract An automatic lighting device having a circuit for operating an electric light, a switch for manually actuating the circuit, a detector circuit for determining whether movement above a prescribed threshold level has occurred within the area covered by the electric light within a first preselected period, a circuit responsive to the detector circuit for disabling the circuit for providing electricity if movement has not occurred in the area during the first preselected period, and a circuit for reactivating the circuit for providing electricity in response to the detection of movement in the area within a second preselected period.
Inventors
- 👤 Philip A. Koehring
- 👤 James D. Himonas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:19
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/945
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
An automatic lighting device comprising a circuit for operating an electric light, means for manually activating the circuit for operating an electric light, means for detecting whether movement above a prescribed threshold level has occurred within the area covered by the electric light within a first preselected period, means responsive to the means for detecting whether movement has occurred for disabling the circuit for operating an electric light if movement has not occurred in the area during the first preselected period, and means for reactivating the circuit for operating an electric light in response to the detection of movement in the area within a second preselected period.
Claim 2
Dependent Claim
107 words
An automatic lighting device comprising a circuit for operating an electric light, means for manually activating the circuit for operating an electric light, means for detecting whether movement above a prescribed threshold level has occurred within the area covered by the electric light within a first preselected period, means responsive to the means for detecting whether movement has occurred for disabling the circuit for operating an electric light if movement has not occurred in the area during the first preselected period, and means for reactivating the circuit for operating an electric light in response to the detection of movement in the area within a second preselected period.
Claim 3
Dependent Claim
22 words
An automatic lighting device as claimed in claim 1 further comprises means for manually deactivating the circuit for operating an electric light.
Claim 4
Dependent Claim
21 words
An automatic lighting device as claimed in claim 1 further comprising means for varying the length of the first preselected period.
Claim 5
Dependent Claim
42 words
An automatic lighting device as claimed in claim 1 in which the means for detecting whether movement has occurred within the area comprises an acoustic transmitter for generating signals into the area, and an acoustic receiver for receiving signals from the area.
Claim 6
Dependent Claim
74 words
An automatic lighting device as claimed in claim 1 in which the means for reactivating the circuit for operating an electric light in response to detection of movement in the area within a second preselected period includes a timing circuit responsive to signals from the means for disabling the circuit for operating an electric light for setting the second preselected period, and means for monitoring the means for sensing movement during the second period.
References Cited (Backward Citations)
US3552520A
Cited
US3934156A
Cited
US3922663A
Cited
US4101886A
Cited
US4207559A
Cited
US4213063A
Cited
US4304967A
Cited
US4277727A
Cited
US4315596A
Cited
US4344071A
Cited
US4362970A
Cited
US4450351A
Cited
US4408308A
Cited
US4391406A
Cited
US4521768A
Cited
US4540984A
Cited
US4461977A
Cited
US4636774A
Cited
US4568868A
Cited
US4661720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |