초록 ▼

A monitoring apparatus for alerting an operator to the need to change a temperature control system filter includes a mechanism for selecting and setting a primary period of filter use to assure replacement before the filter becomes clogged; a mechanism for counting out the selected primary period; a

A monitoring apparatus for alerting an operator to the need to change a temperature control system filter includes a mechanism for selecting and setting a primary period of filter use to assure replacement before the filter becomes clogged; a mechanism for counting out the selected primary period; a mechanism for activating a signalling device to signal the operator to replace the filter, absent replacement of the filter; a mechanism for sensing replacement of the filter; a mechanism for resetting the mechanism for counting to begin the counting out the selected primary period again upon replacement of the filter; a mechanism for counting out a secondary period measured from the end of the primary period; a mechanism for shutting down the system at the end of the secondary period absent replacement of the filter; and a mechanism for detecting a fire within the building. The apparatus preferably additionally includes a mechanism for shutting down the temperature control system upon detection of a fire.

대표청구항 ▼

[ What is claimed is:] [1.] A monitoring apparatus for an air temperature control system within a building, comprising:means for setting a primary period of filter use to assure replacement before the filter becomes clogged;means for setting a secondary period at the end of which the air temperature

[ What is claimed is:] [1.] A monitoring apparatus for an air temperature control system within a building, comprising:means for setting a primary period of filter use to assure replacement before the filter becomes clogged;means for setting a secondary period at the end of which the air temperature control system is automatically shut down:means for counting out the selected primary period;signalling means to signal the operator to replace the filter, absent replacement of the filter;means for sensing replacement of the filter;means for resetting the means for counting to begin the counting out the selected primary and secondary periods again upon replacement of the filter;means for counting out a secondary period measured from the end of the primary period;means for shutting down the system at the end of the secondary period absent replacement of the filter; andfire detecting means within the building connected to the monitoring apparatus.