Q-panel Lab Products Corporation

Q-panel Company

Douglas M Grossman

Gregory R Fedor

William R Wurst

Kenneth A Roll

Danny J Fayak

Steven J Grossman

Gary J Billington

An accelerated weathering apparatus includes a test chamber (), a specimen supporting means (), a light source () powered by a power source controlled by a ballast, at least one chamber air temperature sensor (), a black panel temperature sensor (), and a multiple blower system and control means (). A first blower () draws and circulates outside or fresh air and as second blower () optionally draws recirculated air into an air mixing duct. The speeds of the fresh air and recirculated air are independently regulated and controlled by a blower controller based on the chamber air temperature and black panel temperature, respectively. In addition, a humidifier () and humidity controller () regulates humidity within the system as required.

Multiple-blower relative humidity controlled test chamber

An accelerated weathering apparatus includes a test chamber (), a specimen supporting means (), a light source () powered by a power source controlled by a ballast, at least one chamber air temperature sensor (), a black panel temperature sensor (), and a multiple blower system and control means (). A first blower () draws and circulates outside or fresh air and as second blower () optionally draws recirculated air into an air mixing duct. The speeds of the fresh air and recirculated air blowers are independently regulated and controlled by a blower controller based on the chamber air temperature and black panel temperature, respectively. In addition, a humidifier () and humidity controller () regulates humidity within the system as required.

A gravelometer ( ) includes a base unit ( ) comprising compressed air receiver tank ( ) having wheels ( ) and feet ( ). Main frame ( ) connects tank ( ) to a media gun frame or mount ( ) and includes a bore ( ) for releasably receiving and supporting a media gun ( ) having a mounting flange ( ) so that media inlet ( ) is upwardly oriented and gun barrel or media outlet ( ) extends through gun mount ( ). Media inlet ( ) interconnects via elongated con-duit ( ) to a media supply system ( ) which includes media supply hopper ( ) and vibratory feeder assembly ( ). A control system ( ) having operator control panel ( ) controls operations. A modular target box or chamber ( ) is aided in being releasably connected to base unit ( ) by locator pins ( ). Chamber ( ) includes media inlet ( ), media outlet ( ), which connects to spent media reclaim chamber ( ), and specimen window ( ) having a target holding toggle clamp ( ).

Multi-test gravelometer

A high-instantaneous, low-average current ballast is used in an accelerated weathering apparatus. The ballast includes a DC voltage generator or front end, to generate a high DC voltage, which produces a charging current to charge an arc capacitor. The energy on the arc capacitor is selectively released into a xenon lamp as short, high-current pulses. A starting transformer acts to strike an arc in the lamp. A switch is connected between the capacitor and the lamp, and is used to control generation of current pulses developed for the xenon lamp. A timer is implemented to control operation of the transformer and switch to selectively generate the current pulses for the xenon lamp.

Materials test chamber with xenon lamp radiation

A Weathering apparatus having a light source which irradiates onto specimens located in a specimen supporting wall which is located on a side of a test chamber. The output of the light source is controlled by independently adjustable control channels. Each of the control channels include a light source detector inserted into the test chamber, control circuitry, and ballasts connected to the light sources. The light sources are controlled by the control channels to deliver an output equivalent to a desired set-point. In order to disperse light in an even manner to the specimens, a barrier is provided which interferes in a predetermined pattern with the passage of light produced by the light sources. The apparatus includes a calibrating device which automatically transfers an irradiance signal from a reference detector selectively positioned immediately adjacent the light source detector. The calibration signal is sent to the controller where the re-calibration of a selected control channel is accomplished.

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Fairview Park, OH, United States of America

Douglas M Grossman