Apparatus for positioning an article on a wall

• US 3,982,839 A
• Filed: 03/21/1975
• Issued: 09/28/1976
• Est. Priority Date: 03/21/1975
• Status: Expired due to Term

• Current Assignee: Morton Schwartz
• Original Assignee: Morton Schwartz
• Inventors: Schwartz, Morton
• Primary Examiner(s): McGraw, Vincent P.
• Application Number:
  US05/560,725
• Time in Patent Office: 557 Days
• Field of Search: 356/138, 356/172, 356/248, 356/250
• US Class Current: 356/250
• CPC Class Codes: G01C 15/004 Reference lines, planes or sectors
• CPC Class Codes: Y10S 33/21 with laser

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.

Claims

1. 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.

2. 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.

3. The apparatus of claim 2 wherein said second mirror is conical and is disposed adjacent to said slit.

4. The apparatus of claim 3 wherein said first mirror is parabolic and reflects light downwardly to said second, conical mirror.