Abstract: An ice skate assembly for attachment to a boot has a skate blade and a blade heating arrangement mounted within a blade support. The blade is heated by a row of field-effect transistors or by a resistance heating wire carried on the blade at a circuit board encapsulated on the top edge of the blade in an over-molded plastic strip which engages into a slot in the support as a wedged fit. The blade is attached by an inclined wedge member a screw for pulling the blade longitudinally of the blade and to draw the inclined wedge member into its receptacle. The battery pack is carried in the rear tower which is sealed against moisture penetration and includes two proximity switches for actuation.

Abstract: A safety conveyor apparatus includes a feed section at which a worker loads the materials onto the conveyor and a subsequent conveyor section and an apparatus is provided for immobilizing the conveyor to ensure the safety of the worker in case the worker should be accidentally carried on the conveyor into the conveyor section. Each worker has a vest carrying a series of RFID tag members and a plurality of directionally shielded RFID antennas are mounted on the conveyor section on an arch above the conveyor facing downwardly and on sides facing inwardly to provide a signal to a control system responsive to detection of one or more of the tags by one or more of the antennas for stopping the movement of the conveyor. The tags are programmed with easily detectable codes which indicate the article to which they are attached allowing a periodic test procedure to be run.

Abstract: A safety conveyor apparatus includes a feed section at which a worker loads the materials onto the conveyor and a subsequent conveyor section and an apparatus is provided for immobilizing the conveyor to ensure the safety of the worker in case the worker should be accidentally carried on the conveyor into the conveyor section. Each worker has a vest carrying a series of RFID tag members and a plurality of directionally shielded RFID antennas are mounted on the conveyor section on an arch above the conveyor facing downwardly and on sides facing inwardly to provide a signal to a control system responsive to detection of one or more of the tags by one or more of the antennas for stopping the movement of the conveyor. The tags are programmed with easily detectable codes which indicate the article to which they are attached allowing a periodic test procedure to be run.

Abstract: A heat exchanger for operating at an outlet of a hot fuel cell feeding the heat exchanger with oxidizer gas and with fuel gas, the heat exchanger including: a first flow circuit for oxidizer gas; a second flow circuit for fuel gas; a pre-mixer chamber fed both with oxidizer gas and with fuel gas from at least the second circuit; a combustion chamber fed with the gaseous mixture from the pre-mixer chamber and with oxidizer gas from the first circuit; and a flow circuit for flue gas, receiving the flue gas coming from the combustion chamber. The first flow circuit for oxidizer gas, the second flow circuit for fuel gas, the combustion chamber, and the flow circuit for flue gas are immersed in a common cooling fluid.

Abstract: A heat exchanger for operating at an outlet of a hot fuel cell feeding the heat exchanger with oxidizer gas and with fuel gas, the heat exchanger including: a first flow circuit for oxidizer gas; a second flow circuit for fuel gas; a pre-mixer chamber fed both with oxidizer gas and with fuel gas from at least the second circuit; a combustion chamber fed with the gaseous mixture from the pre-mixer chamber and with oxidizer gas from the first circuit; and a flow circuit for flue gas, receiving the flue gas coming from the combustion chamber. The first flow circuit for oxidizer gas, the second flow circuit for fuel gas, the combustion chamber, and the flow circuit for flue gas are immersed in a common cooling fluid.

Abstract: An ice skate assembly for attachment to a boot has a skate blade and a blade heating arrangement mounted within a blade support. The blade is heated by a row of field-effect transistors carried on a circuit board or another type of heating element encapsulated on the top edge of the blade in an over-molded plastic strip which engages into a slot in the support as a wedged fit. The blade is attached by an inclined wedge member a screw for pulling the blade longitudinally of the blade and to draw the inclined wedge member into its receptacle. The battery pack is carried in the rear tower which is sealed against moisture penetration and includes two proximity switches for actuation.

Abstract: An ice skate assembly for attachment to a boot has a skate blade and a blade heating arrangement mounted within a blade support. The blade is heated by resistive heating wire attached along a groove on each side of the blade. The blade is mounted in the support by an over-molded plastic strip which engages into a slot in the support as a wedged fit. A control circuit board is encapsulated on the top edge of the blade and connects to a battery pack is carried in the rear tower of the support. The blade is attached to the support by a screw for pulling the blade longitudinally of the blade and to draw an inclined wedge member formed by the over-molding into its receptacle.

Abstract: An ice skate assembly for attachment to a boot has a skate blade and a blade heating arrangement mounted within a blade support. The blade is heated by a row of field-effect transistors or by a resistance heating wire carried on the blade at a circuit board encapsulated on the top edge of the blade in an over-molded plastic strip which engages into a slot in the support as a wedged fit. The blade is attached by an inclined wedge member a screw for pulling the blade longitudinally of the blade and to draw the inclined wedge member into its receptacle. The battery pack is carried in the rear tower which is sealed against moisture penetration and includes two proximity switches for actuation.

Abstract: An ice skate assembly for attachment to a boot has a skate blade and a blade heating arrangement mounted within a blade support. The blade is heated by resistive heating wire attached along a groove on each side of the blade. The blade is mounted in the support by an over-molded plastic strip which engages into a slot in the support as a wedged fit. A control circuit board is encapsulated on the top edge of the blade and connects to a battery pack is carried in the rear tower of the support. The blade is attached to the support by a screw for pulling the blade longitudinally of the blade and to draw an inclined wedge member formed by the over-molding into its receptacle.

Abstract: A charger stand for a pair of electrically heated ice skates comprises a pair of channel shaped receptacles for receiving the skates in parallel side by side position with a housing for the charger electronics between the receptacles. A first connector connects to the blade and a second connector at the heel engaging portion touches a terminal on the skate heel. The blade is heated by a heating element encapsulated on the top edge of the blade in The?? battery pack is carried in the rear tower which is sealed against moisture penetration and includes two proximity switches for actuation.

Abstract: An ice skate assembly for attachment to a boot has a skate blade and a blade heating arrangement mounted within a blade support. The blade is heated by a row of field-effect transistors carried on a circuit board or another type of heating element encapsulated on the top edge of the blade in an over-molded plastic strip which engages into a slot in the support as a wedged fit. The blade is attached by an inclined wedge member a screw for pulling the blade longitudinally of the blade and to draw the inclined wedge member into its receptacle. The battery pack is carried in the rear tower which is sealed against moisture penetration and includes two proximity switches for actuation.

Abstract: An ice skate assembly for attachment to a boot has a skate blade and a blade heating arrangement mounted within a blade support. The blade is heated by a row of field-effect transistors carried on a circuit board or another type of heating element encapsulated on the top edge of the blade in an over-molded plastic strip which engages into a slot in the support as a wedged fit. The blade is attached by an inclined wedge member a screw for pulling the blade longitudinally of the blade and to draw the inclined wedge member into its receptacle. The battery pack is carried in the rear tower which is sealed against moisture penetration and includes two proximity switches for actuation.