Abstract: Provided are a system for clamping an object to a railing and a table and apparatus using the system. In one aspect, the system for clamping an object to a railing includes: a threaded bolt, a knob secured to a first end of the bolt, a first wing with an elongated body that is carried on the bolt, and a second wing with an elongated body that is threadedly engaged on the bolt. The first wing is positioned on the bolt between the knob and the second wing. In addition, the first and second wings are movable toward and away from the knob between a clamping and a non-clamping position.

Abstract: An elongated, elastic tube provides a brace for wrapping about a person's knee or other part of the body. The brace is wrapped about the knee in a criss-cross fashion wherein four diagonal members intersect at four points surrounding the knee cap, i.e., top, bottom and each side. The brace is held in place by tape, VELCRO or other fastening means, and may be solid or inflated with air or another suitable fluid until a comfortable, protective pressure is reached within the elongated tube. When properly positioned and filled, the brace supports the knee or other body member, and also provides a protective cover which withstands otherwise injurious impacts. The basic wrap may be incorporated into a single unit having a criss-cross wrap outline integrally formed and adapted to be wrapped in a single unit.

Abstract: A realistic laser weapon simulator is disclosed which utilizes a laser transmitter in combination with a rifle for teaching marksmanship by firing laser "bullets" at an infrared detector equipped target. The laser weapon includes a piezoelectric crystal coupled to a laser in a housing for mounting axially to a rifle barrel. The rifle may develope a mechanical force by firing a blank cartridge which generates a shock wave and vibrates the piezoelectric device. A mechanical force may also be applied directly to the piezoelectric device by the rifle's hammer.