Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1984-07-27
1986-03-11
Ward, Robert S.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33367, 33379, G01C 906
Patent
active
045744912
ABSTRACT:
A bubble level has at least two position sensing devices, such as mercury switches, disposed at right angles to each other and connected in a circuit having a three-position switch and an audio indicator, such as a buzzer. When the level is to be used to determine horizontal alignment, these switches move to a first position causing a horizontally disposed one of the position sensors to be cut into the circuit, while simultaneously cutting out the other position sensor. When the level is horizontally aligned, which may be in a position not in full view of the user, the position sensor completes the circuit and causes the audio indicator to sound. When the level is to be used to determine vertical alignment, the switch is moved to a second position, which cuts out the horizontal position sensor and cuts in the vertical position sensor and the same procedure can be undertaken. The switch has a central off position.
REFERENCES:
patent: 1251349 (1917-12-01), Day
patent: 2600363 (1952-06-01), Morris
patent: 3172212 (1965-03-01), Pappas
patent: 3657695 (1972-04-01), Birmingham
patent: 3660840 (1972-05-01), Plofchan
patent: 3861052 (1975-01-01), Siegfried
patent: 4079521 (1978-03-01), Uhorczak
patent: 4152839 (1979-05-01), McDonald
LandOfFree
Level with audio indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Level with audio indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Level with audio indicator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2184386