Abstract: A self contained High Power LED cooling system has a connected LED chip, heat radiator, fan, and self-containing power supply. The components are interconnect by spring loaded posts to absorb temperature expansion. A thermocouple device monitors the temperature to shut off the LED chip before reaching a critical temperature.

Abstract: A utensil is adapted to be held by a user and manipulated by the user's hand to operate on a workpiece. One feature of the utensil enables the user to gain mechanical advantage when locking and unlocking key-operated locking mechanisms by displacing a key from its stowed state to its extended state. Other features include a letter opener, a cap remover, and an abrasive element.

Abstract: A system including at least a pair of mounting spars supported in a spaced-apart parallel relationship by modular sections constructed of standardized hardware for mounting one or more solar collector panels in predetermined positions on stationary surfaces. The system includes provisions for accommodating expansion and contraction of the collector panels and insulating the manifold pipes employed in a solar installation for preventing radiation heat losses.

Abstract: An electrical power supply circuit for converting alternating circuit power into a direct current output comprises a transformer and rectifier, a filter capacitor across the output terminals and a phase control switching device and a non-saturating inductor in the primary circuit. The circuit arrangement reduces the volt-time integral of the transformer and allows its core to be made of a smaller size, in comparison to the transformer cores of previously known power supplies, without danger of saturation. Other advantages such as low RFI, reduced transformer wire size and overload current protection are obtained. A commutator circuit may also be provided for turning off the phase control switching device before the end of the associated half cycle of input voltage to further reduce the transformer volt-time integral and to accordingly allow a further reduction in its core size.