Filter alert apparatus

Details Filter alert apparatus Filter alert apparatus

1989-04-25

1992-06-23

Roskoski, Bernard

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368276, 368316, 368317, G04F 800

Patent

active

051249570

ABSTRACT:
A programmable timing device for use in combination with an existing thermostat housing is set forth wherein the apparatus effects actuation selectively or in combination of an audible and visual display to alert an individual to a need in maintenance of an associated furnace air filter. The apparatus may be secured to a wall surface or optionally, adhesively secured to the existing thermostat housing by means of a mounting bracket. The mounting bracket is provided with break-away orthogonally oriented grooves to accommodate the housing of the timing apparatus in regions of limited support wall surface area to accommodate the entire mounting bracket.

REFERENCES:
patent: 472162 (1892-04-01), Davies
patent: 1853483 (1932-04-01), Winters
patent: 2292959 (1942-08-01), Monson
patent: 2538449 (1951-01-01), Freshwater
patent: 2711263 (1956-11-01), Boho
patent: 3914951 (1975-10-01), Heidorn
patent: 3927315 (1975-12-01), Werry
patent: 4218871 (1980-08-01), Moritani et al.
patent: 4444512 (1984-04-01), Piguet et al.

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