Abstract: A shield assembly for a gas sensor and a method for securing the shield assembly to the gas sensor are provided. The shield assembly includes an outer shield and an inner shield. The outer shield includes an outer wall defining a cavity therein and a tip portion located at one end of the outer wall. The outer wall includes a plurality of apertures extending therethrough. The inner shield is disposed within the cavity of the outer shield. The inner shield includes an inner-wall defining an inner cavity therein. The inner wall is in a facing spaced relationship with respect to the outer wall. The inner shield further includes an engagement portion, a tip engaging portion, and a plurality of inner shield apertures. The plurality of inner shield apertures and the plurality of apertures of the outer wall provide fluid communication to the inner cavity through the outer shield and the inner shield.

Abstract: A containment shield for a replaceable Xenon lamp and reflector module provides a safe, simple means of replacing and handling an arc lamp (10) for a light valve projection system. Guides (93, 94) are provided which act as a means of positioning and allowing easy removal of a lamp module (97). These guides also provide the mounting structure for a spring (112) that locks the lamp module into the guides to prevent removal unless the containment shield or shutter (91) is on and the means for releasing the shutter once the lamp module is in place. A shutter release screw (110) is locked into its mounting bracket to prevent its total removal. This insures that the screw will be there to release a shutter and not be removed or lost. The lamp module itself is composed of a rectangular mount plate (99) which provides the support for the arc lamp (10), reflector (100) and other components.