Abstract: A mirror assembly for ensuring correct coverage of a critical field of view. Reference points (e.g., markings, light sources, images of objects) are used for correct mirror adjustment. In one embodiment, dots are located on the center of the mirror and on a fixed inner and outer glass located immediately in front of the mirror. The viewer aligns the dots such that the dot on the mirror appears directly in front of mirror images of the dots on the outer an inner glass. In an alternative embodiment, a light source produces the reference points. The light is reflected by a back surface of the mirror coated in a concentric pattern of gradient coating material. The resulting reflection is a reflected spot corresponding to the center of the patterns, where a transparent center window is located, and a shaded area corresponding to the concentric pattern. The viewer tilts the mirror so that the reflected spot overlaps the shaded area in the line of sight. The mirror could be a rear view or side-view mirror.

Abstract: A light source for generating a light beam which can be focused in many different directions or varied in intensity under control of a user's hand. A light sensor for detecting the focused light beam and generating a sensor signal based on either the light beam's area of coverage on the light sensor or the light beam's intensity. A modulation apparatus for receiving the sensor signal and in response modulating a computer variable and/or an electronic signal. A freeze circuit for inhibiting modulation when the sensor signal either exceeds or falls below a predetermined maximum or minimum level.

Abstract: A remote controlled system for providing security measures includes an input interface through which a user can provide commands to secure and access a remote object. A security unit is coupled to the input interface and is responsive to the commands to perform protective functions. A transmission control unit is coupled to the security unit and is responsive to the protective functions to transmit signals to the remote object.

Abstract: An envelope suitable for machine sorting equipment, the envelope being adapted to be used twice, once on an outward trip, and once on a return trip when the envelope is returned to the original sender and having front and back panels and two closure flaps namely an outward trip closure flap and a return trip closure flap, the return trip closure flap being concealed within the envelope during the outward trip, and being capable of being extracted from the interior of the envelope to reseal the envelope for its return trip, the outward closure flap and part of the front panel being removed from the envelope prior to the return, and the front panel having a perforation line whereby both the outward trip closure flap and part of the front panel may be removed when it is torn off, to open the envelope. The return trip flap then folds out and covers the gap in the front panel.