US3787677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock and key light
Assignee: NU PRO CORP
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Filing: 1972-08-21
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Granted: 1974-01-22
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Expires: 1992-08-21
Abstract
Abstract An automatic, door frame mounted, lock and key light having a button operated, battery powered light operable to illuminate the key and lock area upon opening of a screen door or the like. The button is spring loaded with the spring comprising part of the battery power circuit and moving into contact with a battery terminal upon movement of the button.
Inventors
- 👤 B Molitor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:36
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
225 words
A lock and key light adapted to operate in response to the opening of a door comprising: an electrically non-conducting housing with mounting means affixed thereto adapted to mount the housing to a door frame between first and second doors including a non-conducting secondary support member adapted to fit in said housing, said secondary support member having battery positioning means thereon and a plurality of holes therein for locating circuit elements; a light source positioned in said housing in a position to direct light out of said housing in a direction to impinge upon the lock area of said second door when the housing is mounted on the door frame; a battery power circuit in said housing for supplying current to said light source; and a spring urged electrically non-conducting button in said housing positioned to be moved by the opening of said first door, said button comprising a member slideably supported by and extending through the housing and having a generally transverse hole; an electrically conducting wire spring secured through at least one of said holes in said secondary support member and inserted through said transverse hole with one end in a position to contact the light source and the other end in position to contact a battery terminal upon movement of said button member, the spring comprising part of said battery power circuit.
Claim 2
Dependent Claim
225 words
A lock and key light adapted to operate in response to the opening of a door comprising: an electrically non-conducting housing with mounting means affixed thereto adapted to mount the housing to a door frame between first and second doors including a non-conducting secondary support member adapted to fit in said housing, said secondary support member having battery positioning means thereon and a plurality of holes therein for locating circuit elements; a light source positioned in said housing in a position to direct light out of said housing in a direction to impinge upon the lock area of said second door when the housing is mounted on the door frame; a battery power circuit in said housing for supplying current to said light source; and a spring urged electrically non-conducting button in said housing positioned to be moved by the opening of said first door, said button comprising a member slideably supported by and extending through the housing and having a generally transverse hole; an electrically conducting wire spring secured through at least one of said holes in said secondary support member and inserted through said transverse hole with one end in a position to contact the light source and the other end in position to contact a battery terminal upon movement of said button member, the spring comprising part of said battery power circuit.
Claim 3
Dependent Claim
29 words
The apparatus of claim 1 in which said circuit elements include a metal tab adapted to hold said light source and provide one electrical contact for the light source.
Claim 4
Dependent Claim
46 words
The apparatus of claim 2 in which said metal tab extends through a second one of said holes in said secondary support member, under the secondary member, and back through a third one of said holes in the secondary member into contact with a battery terminal.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |