Weather monitoring apparatus

Claim 1

Apparatus for monitoring weather conditions, to detect conditions favorable to the growth of mildew, comprising in combination: a temperature sensor operating to produce an output signal whenever the ambient temperature is above a predetermined threshold value, a first rainfall sensor operating to produce an output signal when it is not raining, a second rainfall sensor operating to produce an output signal when a predetermined amount of rain has fallen, a coincidence circuit, the outputs of the three said sensors being connected to three inputs of said coincidence circuit, said coincidence circuit operating to produce an output signal when all three said sensors are producing their respective output signals, a timing device, the output signal from said coincidence circuit being connected to said timing device whereby the operation of said timing device is enabled while the output signal from said coincidence circuit is being produced, said timing device itself producing an output signal if the coincidental generation of output signals from all three sensors continues for a predetermined time interval set by said timing device.

Claim 9

The apparatus of any one of claims 2-7, wherein there is further provided: a second timing device, a third rainfall sensor operating to produce an output signal when a second predetermined amount of rain has fallen, and a switching device operating to connect, in one position thereof said second rainfall sensor to said coincidence circuit and said first timing device to said latching device, and in another position thereof said third rainfall sensor to said coincidence circuit and said second timing device to said latching device whereby to detect, when in said one position, conditions favourable to a primary infection of mildew and, when in said other position, conditions favourable to a secondary infection of mildew.