Abstract: A process for casting three-dimensional parts and sacrificial models from casting compounds forced by pressurized inert gas into transparent molds that are supported by transparent mold frames. The casting compound incorporates radiation activated photo initiators which cause polymerization and curing of the compound within the mold. An automated casting system is anticipated which is enabled by the use of very soft, stretchable and deformable material for the mold body and supporting the mold with radiation transparent mold frames. Oxygen and other gases in the atmosphere react with some casting compounds to create a sticky film on mold cavity walls which causes difficulty when removing a casting from a mold. This problem is eliminated by purging the mold cavity with an inert gas between casts.

Abstract: A process and apparatus for casting three-dimensional parts and sacrificial models from a class of casting compounds which incorporate one or more radiation activated photo initiators which cause polymerization of the casting compound causing it to solidify or transition from a solid in a first state to a solid more suitable for use as a sacrificial model in a lost wax casting process. The class of casting compounds include, 1) compounds which act as conduits for the polymerization initiating radiation during and/or after hardening and 2) compounds which are hardened by a radiation induced chain reaction throughout the body of fluid casting compound. These compounds allow the part being cast to be cured within transparent molds that are supported by transparent mold frames. The apparatus consists of a radiation source positioned to irradiate the casting compound within a mold cavity through the mold frame and mold wall to effect the polymerization, solidifying, process.

Abstract: A remotely activated control device responsive to a specific transmitter operating in a frequency band assigned to radio telephone equipment, such as cellular telephone networks, cordless telephones, etc. The control device includes a radio receiver which provides a received pulse train to an assurance logic circuit. The assurance logic circuit determines if the received pulse train is limited to no more than a transmitter identification code and an action code, the combination of which is less than the code required to activate a relay network or initiate a radio telephone connection. Pulse trains accepted by the assurance logic circuit are compared to a stored code by a comparitor. The stored code includes the identification of a specific transmitter or group of transmitters and at least one action code. If the received pulse train matches the stored code, a switching circuit is activated to control a user supplied device.

Abstract: A remotely activated control device responsive to a specific transmitter operating in a frequency band assigned to radio telephone equipment, such as cellular telephone networks, cordless telephones, etc. The control device includes a radio receiver which provides a received pulse train to an assurance logic circuit. The assurance logic circuit determines if the received pulse train is limited to no more than a transmitter identification code and an action code, the combination of which is less than the code required to activate a relay network or initiate a radio telephone connection. Pulse trains accepted by the assurance logic circuit are compared to a stored code by a comparitor. The stored code includes the identification of a specific transmitter or group of transmitters and at least one action code. If the received pulse train matches the stored code, a switching circuit is activated to control a user supplied device.

Abstract: A process and apparatus for casting three-dimensional parts and investment models from a class of fluid casting compounds, which are solidified by a reaction triggered by actinic radiation. The casting compound hardens in a chain reaction induced by the radiation and/or the casting compound acts as a conduit for the radiation during and after curing. This allows parts being cast to be solidified within molds that are opaque. The apparatus consists of a solidifying actinic radiation source positioned to trigger the chain reaction as the casting compound enters the mold and/or radiate into the mold cavity through the sprue hole, windows or venting holes to effect the curing process. The curing, or solidifying, process is accelerated by irradiating the compound as it flows into the mold cavity.