초록 ▼

A vapor or gas detector (12) that forms an element of a vapor or gas detecting and alarm system (30). The detector in one of its embodiments is configured as a three-section dynamic junction (16) consisting of a resilient substrate (22) having a resonant mechanical element (18) attached to its back

A vapor or gas detector (12) that forms an element of a vapor or gas detecting and alarm system (30). The detector in one of its embodiments is configured as a three-section dynamic junction (16) consisting of a resilient substrate (22) having a resonant mechanical element (18) attached to its back and an absorbate (20) to its front. When no toxic vapors or gases are present, the element (18) is under a no-strain, no deformation condition and emits a first frequency signal. When a toxic vapor or gas is present, the absorbate (20) absorbs the gas or vapor which causes the substrate (22) to deform and, in turn, causes the element (18) to deform and emit a second frequency signal. This second frequency signal is applied to the system (30) where the signal, through a series of electronic circuits is processed. The processed signal activates a lamp (44a) and an audible alarm (44a) indicating that the detected vapor or gas has exceeded a preselected toxicity level.

대표청구항 ▼

A vapor or gas detects wherein said detector comprises an element of a vapor or gas detecting and alarm system that is constructed as an integrated microcircuit wherein an absorbate on said vapor and gas detector projects through the surface of the microcircuit package to allow said absorbate to be

A vapor or gas detects wherein said detector comprises an element of a vapor or gas detecting and alarm system that is constructed as an integrated microcircuit wherein an absorbate on said vapor and gas detector projects through the surface of the microcircuit package to allow said absorbate to be exposed to the outside environment where said detector is comprised of a three-section dynamic junction further comprising: (a) a resilient substrate having a front and a back, (b) a resonant mechanical element rigidly attached to the back of said substrate, and (c) said absorbate rigidly attached to the front of said substrate, where said absorbate is designed to attract and adsorb the vapor or gas molecules in proportion to their molecular density, molecular size and exposure time where: (1) when no vapor or gas is being absorbed by said absorbate said element is under a no-strain, no-deformation condition and thus emits a first frequency signal, and (2) when a vapor or gas is absorbed by said absorbate a pressure differential is created between said element and said substrate that causes said element to strain and deform and thus emit a second frequency signal that differs from the first frequency signal, and where said vapor or gas detecting and alarm system further comprises: (a) a first oscillator circuit that oscillates at and emits a first frequency oscillator signal (f1) when the first frequency signal from said detector is applied and which changes and emits a second frequency oscillator signal (f2) when the second frequency signal from said detector is applied, (b) a reference frequency crystal that emits a reference frequency signal, (c) a second oscillator circuit that oscillates and emits a reference frequency oscillator signal (f3) when the reference frequency signal from said reference crystal is applied, (d) a frequency comparator circuit that receives the first frequency oscillator signal (f1) or second frequency oscillator signal (f2) from said oscillator and the reference frequency oscillator signal (f3) from said second oscillator circuit, where said comparator emits a vapor/gas signal when said second frequency oscillator signal (f2) exceeds a preset signal level, (e) a preset counter circuit connected to the output of said comparator circuit where said counter emits a trigger signal when the applied vapor/gas signal from said comparator exceeds a preset count within a specified time period, (f) an alarm circuit that is energized upon the application of the trigger signal from said counter, and (g) a power source designed to provide all the voltages and currents required to operate said system.