US3982839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for positioning an article on a wall
Assignee: Individual
•
Filing: 1975-03-21
•
Granted: 1976-09-28
•
Expires: 1995-03-21
Abstract
Abstract An apparatus which provides a reference light beam projected onto one and preferably all the walls of a room whereby a reference line is provided for positioning articles thereon.
Inventors
- 👤 Morton Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:03
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/002; G01C15/004; Y; Y10; Y10S; Y10S33/00; Y10S33/21
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
An apparatus for projecting a directionally oriented light beam onto the walls of a room, said light beam providing a reference line for positioning an article on one of said walls, said apparatus comprising: a. a vertically adjustable support member; b. a weighted enclosure vertically suspended from said support member; c. a light source mounted within said enclosure; d. means defining a slit in the wall of said enclosure, said slit extending in a horizontal plane and extending substantially entirely around said enclosure; and e. means for reflecting light from said light source outwardly through said slit whereby, when said enclosure is suspended from said support member and is positioned within a room and said light source is activated, a horizontal light beam is projected onto the walls of said room and may be utilized when positioning an article on a wall.
Claim 2
Independent Claim
142 words
An apparatus for projecting a directionally oriented light beam onto the walls of a room, said light beam providing a reference line for positioning an article on one of said walls, said apparatus comprising: a. a vertically adjustable support member; b. a weighted enclosure vertically suspended from said support member; c. a light source mounted within said enclosure; d. means defining a slit in the wall of said enclosure, said slit extending in a horizontal plane and extending substantially entirely around said enclosure; and e. means for reflecting light from said light source outwardly through said slit whereby, when said enclosure is suspended from said support member and is positioned within a room and said light source is activated, a horizontal light beam is projected onto the walls of said room and may be utilized when positioning an article on a wall.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein said light reflecting means comprises a first mirror and a second mirror and said light source is positioned between said first and second mirror.
Claim 4
Dependent Claim
18 words
The apparatus of claim 2 wherein said second mirror is conical and is disposed adjacent to said slit.
Claim 5
Dependent Claim
20 words
The apparatus of claim 3 wherein said first mirror is parabolic and reflects light downwardly to said second, conical mirror.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |