Snowfall measuring method and apparatus

Details Snowfall measuring method and apparatus Snowfall measuring method and apparatus

1983-01-05

1986-07-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73293, E01N 2185

Patent

active

046008420

ABSTRACT:
A probe is fixed to a vertically displaceable rack. Under the probe is a reference plate freely exposed to snowfall. The probe is periodically lowered toward the reference plate and stopped when it encounters either the plate or a layer of snow which has fallen on the plate. With the aid of a light barrier and a perforated disk, electrical signals dependent upon the distance travelled by the probe are generated and transmitted to an evaluating device. This device calculates, on the basis of the signals received, the difference between the aforementioned distance travelled and the distance from the reference plate to the probe in its uppermost position. This difference corresponds to the thickness of the deposit of snow on the plate. For subsequent measurements, a new reference value corresponding to the surface of the snow already lying on the plate can be used for the calculation. Hence there is no need for clearing the plate of snow after each alarm signal.

REFERENCES:
patent: 1664265 (1928-07-01), Reiber
patent: 2683371 (1954-07-01), Droin et al.
patent: 2906026 (1959-09-01), Hannes
patent: 3428815 (1969-02-01), Thompson
patent: 3530453 (1970-09-01), Rossier
patent: 3631526 (1971-12-01), Brunton
patent: 3872598 (1975-03-01), Bachner et al.
patent: 4056887 (1977-11-01), Tucker et al.

Affiliated with

Also associated with

Rating

Snowfall measuring method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Snowfall measuring method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Snowfall measuring method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1742452