Electronic level with display scale and audible tone scale

Details Electronic level with display scale and audible tone scale Electronic level with display scale and audible tone scale

1992-08-14

1994-05-24

Cuchlinski, Jr., William A.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33343, 73 1E, 340689, G01C 906, G01C 918

Patent

active

053137132

ABSTRACT:
An electronic level includes a visual display (similar to a ruler scale) having a number of parallel line segments. The inclination of the device is shown by illuminating various of the scale line segments on either side of the central line. When the device is at a null (typically level or plumb) only the central scale line is illuminated, indicating the inclination away from the null. Each scale line segment indicates 1/64th of an inch of inclination per foot of horizontal distance which conforms to the normal use of such levels by building tradesmen. A multi-tone audio output corresponds to the visual display line segments, with one tone being provided for each increment of inclination arranged in order of the musical scale. A fixed offset mode is provided showing if the device is at a particular slope such as 1/8" per foot. In addition, a variable user offset mode allows indication of any predetermined inclination within the full 360.degree. range. The level circuitry averages the input signals from a capacitive sensor to provide a crisp indication of the indication of the null position and rapid display of the amount of inclination. User calibration is provided in any physical orientation.

REFERENCES:
patent: 4839833 (1989-06-01), Parhiskari
patent: 4912662 (1990-03-01), Butler et al.
patent: 4932132 (1990-06-01), Baker et al.
patent: 5083383 (1992-01-01), Hegar
patent: 5136784 (1992-08-01), Marantz

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