Streamlight, Inc.

Chanchal M Singh

Heinz F Thummel

Robert S Szemeredi

A flashlight bulb is mounted to a cylindrical bulb chassis such that the base of the light bulb is spaced apart from the top surface of the bulb chassis. A layer of resilient silicone material is positioned in the clearance space between the space-dapart base of the light bulb and the front surface of the bulb chassis to provide cushioning for axial and radial movement of the light bulb. A heat resistant resilient O-ring is inserted in an enlarged rear portion of the central bore of a reflector housing such that the internal surface of the O-ring slip fits around the cylindrical body of the light bulb to cushion the light bulb for radial movements of the light bulb and so that the light bulb remains mechanically and optically aligned with the central axis. For good cushioning the durometer of the O-ring is between 60-70 and the durometer of the silicone layer is between 50-60. The thickness of the O-ring is chosen to be sufficient to absorb shock from the bulb and the O-ring slip fits around the bulb to assure proper mechanical and optical alignment to the central axis of the bulb. A cylindrical flashlight reflector housing slideably receives the cylindrical bulb chassis. A helical spring pushes the bulb chassis towards the rear of the flashlight. Rotation of the reflector housing with respect to the battery housing moves the bulb along the axis of the flashlight to change the focus of the flashlight beam. The flashlight bulb mounting assembly also includes a second O-ring at the rear surface of the bulb chassis to provide cushioning for rearward axial movement of the bulb chassis. The battery contact ring and the battery contact coil spring are separated by an insulated washer and provide respective connections to the opposite terminals of the battery.

Growing community of inventors

Salinas, CA, United States of America

Chanchal M Singh