Abstract: A glass-to-metal seal assembly for electrical components. The glass-to-metal seal assembly provides ceramic washers that sandwiches the glass portion of the glass-to-metal seals. The ceramic washer encases the glass seal, thereby reinforcing the glass surface against crack propagation and the formation of a fragile glass meniscus at the interface of the glass seal and the encased electrical component. The ceramic washers may have a coefficient of thermal expansion that closely matches the coefficient of thermal expansion all of the other components of the assembly.

Abstract: A radio frequency shield door system is provided. The radio frequency shield door system provides an effective RF and electromagnetic seal between a door and the perimeter of the doorway through a continuous interface of conductive or magnetic material between peripheral sealing surface of the door and a perimeter frame of the doorway. The perimeter frame may provide spring-loaded contact rails electrically or magnetically coupled thereto so that when the door is in a closed configuration a RF seal is formed between the interfacing sealing surface and contract rails, yet the door is still readably between an open configuration and closed configuration.

Abstract: An animal feeder device is provided. The animal feeder device provides a net integrated with an expandable frame along a peripheral opening of the net. The frame selectively moves between a retracted condition and an extended condition effectively holding the net open, making it easy for one person to fit feed therein, and wherein the retracted condition can make the peripheral opening selectively small enough to prevent the feeding animal from reaching into the opening of the net.

Abstract: An electromagnetic shielded door with constant force spring perimeter seal may include a door panel and door jamb. The door panel may include a sealing member around a perimeter of an inside face of the door panel. In certain embodiments, the sealing member may have a raised sealing surface. The door jamb may have at least one spring containment member along an inside perimeter facing the door panel. A spring mechanism may attach to the at least one spring containment member. The spring mechanism may include a plurality of continuous force flat torsion roller springs attached to at least one spring containment member which may be part of a channel. The raised sealing surface may engage with the plurality of continuous force flat torsion roller springs on the at least one spring containment member of the channel.