Abstract: A water flow control valve (10) designed to be installed externally on a toilet tank (108) or as an integral element of a toilet ballcock (110). The valve (10) incorporates a diaphragm (46), a spring (62), a poppet assembly (70), and an inlet port (38) that is connected to a utility water supply (100) and an outlet port (42) that is connected through a pipe (102) to a fitting (106) on the the toilet tank (108). The valve functions by sensing the pressure at the inlet port (38). When no large demands are placed on the water supply (100), the valve (10) remains open, thus allowing the toilet tank (108) to fill. When a shower is turned on, the water pressure drops which reduces the upward force on the diaphragm (46), thus allowing the spring (62) to place the poppet (70) in a closed position which prevents the toilet tank (108) from filling. When the water demand ceases, the water pressure opens the valve (10), which allows the toilet tank (108) to fill.

Abstract: A refractometer which provides a “sugar” or “diet” indication when immersed on a beverage. The device is electronic and lights either a “sugar” or “diet” signal to the user. A prove has a light source and a photodetector at one end and an angled face at the other end. Depending on the refractive index of the beverage, the light is either reflected back into the probe and into the photodetector and exits out of the angled face and does not reflect back to the photodetector.

Abstract: A refractometer which provides a “sugar” or “diet” indication when immersed on a beverage. The device is electronic and lights either a “sugar” or “diet” signal to the user. A prove has a light source and a photodetector at one end and an angled face at the other end. Depending on the refractive index of the beverage, the light is either reflected back into the probe and into the photodetector and exits out of the angled face and does not reflect back to the photodetector.

Abstract: The invention is an airborne vehicle. In detail, the invention includes a main body having a longitudinal, lateral and vertical axis. A pair of wings are pivotally mounted to the main body that are movable about an axis of rotation from a retracted position to an extended position external of the main body along the lateral axis. A linkage assembly for controlling the position of the wings is mounted within the vehicle that includes a guide assembly having an open ended slot aligned with the longitudinal axis thereof. First and second links have their first ends pivotally connected to the wings at a position offset from the axis of rotation of the wings, and the second ends thereof pivotally coupled to each other.