Abstract: A structural unit comprising an assembly of bows longitudinally spaced and secured together by structural members, which is easily and rigidly assembled by using sliding connections of extrusions, for subsequent fitting to a range of preexisting chassis, to yield specific vehicles.

Abstract: A configurable keypad assembly adapted for vehicular controls. A kit for assembling such a configurable keypad is also disclosed. The overlay is provided with identification markings. The keypad assembly includes a configurable keypad circuit provided with a plurality of switches responsive to pressure thereon. The keypad circuit is encased in a flexible sleeve that is shaped to fit over the circuit. The top surface of the sleeve has a number of independently pressable button areas in alignment with the switches, such that any pressure exerted on a given button area activates the switch under it. The assembly also includes means for securing the rigid fascia overlay over the button areas. The identification markings on the overlay, once installed, are in alignment with the button areas. The configurable keypad assembly has the flexibility of being distributed with or without the fascia overlay and can be made waterproof for marine applications.

Abstract: A structural unit comprising an assembly of bows longitudinally spaced and secured together by structural members, which is easily and rigidly assembled by using sliding connections of extrusions, for subsequent fitting to a range of preexisting chassis, to yield specific vehicles.

Abstract: A modular mask system comprises a frame for fitting over a user's head, and a set of interchangeable mask components. Each interchangeable mask components can be removeably attachable to the frame. Each of the interchangeable mask components is one of a top panel, a side panel assembly, an eyepiece and a nosepiece. The interchangeable side panel assemblies can be different sizes to accommodate the user's face or have different patterns or have different configurations of ventilation holes. The interchangeable eyepieces allow the user to choose from dual lenses and a single shield. The eyepieces can include optically powered lenses, shaded lenses, dual lenses tinted lenses, photochromatic lenses and polarized lenses.