Geometrical instruments – Area integrators – Electrical
Patent
1983-01-12
1984-07-31
Stearns, Richard R.
Geometrical instruments
Area integrators
Electrical
362119, G01B 310
Patent
active
044621604
ABSTRACT:
An illuminated retractable tape measure has a casing which contains a coiled tape rule whose free end extends through an opening in the casing. A lock arrangement locks the tape against automatic retraction into the casing. In the lock arrangement, a locking member is mounted in the casing with an end thereof engageable with the tape to hold the same against a portion of the casing in a locking position. The end of the locking member is moved out of engagement with the tape when an unlocked position is established. A slide actuator pivots the lock member between its locked and unlocked positions. A small lamp or lamps is incorporated in the casing for illuminating the ruling on the tape measure, and the actuator closes a switch when the actuator is moved to its locked position to light the lamp. This feature facilitates reading measurements on the tape measure, especially in adverse lighting conditions.
REFERENCES:
patent: 1276311 (1918-08-01), Armbruster
patent: 2354853 (1944-08-01), Dobbs
patent: 2804538 (1957-08-01), Leone
patent: 2992487 (1961-07-01), Miller
patent: 3214836 (1963-04-01), West
patent: 3812588 (1974-05-01), Bennett
patent: 3942738 (1976-03-01), Rutty
patent: 4181959 (1980-01-01), Tateishi
Popular Mechanics, Jan. 1949, p. 252.
Cohen Howard
Pakus Edward
Irwin Measuring Tool Company
Razzano Pasquale A.
Stearns Richard R.
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