Abstract: A movable barrier operator comprising a motor, communication circuitry configured to receive a control signal and communicate with a door lock associated with a passageway door, and a controller. The controller is configured to authenticate the control signal, wherein authenticating the control signal includes associating the signal with a first level of access or a second level of access. The controller is further configured to communicate with the door lock via the communication circuitry to permit opening of the passageway door in response to associating the control signal with the first level of access and inhibit opening of the passageway door in response to associating the control signal with the second level of access. The controller is configured to cause the motor to open the movable barrier regardless of association of the control signal with the first level of access or the second level of access.

Abstract: A movable barrier operator comprising a motor, communication circuitry configured to receive a control signal and communicate with a door lock associated with a passageway door, and a controller. The controller is configured to authenticate the control signal, wherein authenticating the control signal includes associating the signal with a first level of access or a second level of access. The controller is further configured to communicate with the door lock via the communication circuitry to permit opening of the passageway door in response to associating the control signal with the first level of access and inhibit opening of the passageway door in response to associating the control signal with the second level of access. The controller is configured to cause the motor to open the movable barrier regardless of association of the control signal with the first level of access or the second level of access.

Abstract: This Simplified Self Powered Attitude Survival Indicator, provides a simple indicator which gives a visual indication of aircraft attitude and provides suitable indicators and alarms when needed. No vacuum or powered gyroscopes are used. The indicator is self powered and readily transportable from one aircraft to another. This invention is not used to replace the standard gyroscopic indicator, but to supplement it.

Abstract: High quality epitaxial layers of monocrystalline materials can be grown overlying monocrystalline substrates such as SiC or sapphire by forming a compliant substrate for the growing the monocrystalline layers. Devices and methods for fabricating silicon carbide based heterojunction bipolar devices such as transistors and diodes. These devices are suitable for high power and/or high speed and/or high temperature electronic applications.

Abstract: A new type of polymer is described that represents a new composition of matter. This polymer contains alternating electronegative group III-VI elements connected with hydrocarbon or fluorocarbon linkages to form a polyalkyl or polyfluoroalkyl heteroatomic polymer. These polymers can be combined with lithium salts to form a solid polymer electrolyte for use in electrochemical systems such as batteries. These new solid polymer electrolytes exhibit lithium cation diffusion and lithium cation transport numbers that are superior to similar solid polymer electrolytes composed of polyethylene oxide.

Abstract: A new type of electrochemical cell is described which can be used for generating electricity, or in an electrolysis mode can produce gases such as hydrogen and oxygen. The cell is constructed from laterally positioned catalyst layers as electrodes with the gap between the catalyst layers having interposed a solid polymer exchange membrane which provides an ion conductive path from the first catalyst layer to the second. The catalyst layers and the electrolyte are in the form of thin films on the surface of a supporting substrate. A plurality of these cells may be formed on the substrate and interconnected electrically forming a network of series and/or parallel connected cells. Means are provided to feed fuel and oxidant to the electrodes as separate gases through channels.

Abstract: A new type of polymer is described that represents a new composition of matter. This polymer contains alternating electronegative group III-VI elements connected with hydrocarbon or fluorocarbon linkages to form a polyalkyl or polyfluoroalkyl heteroatomic polymer. These polymers can be combined with lithium salts to form a solid polymer electrolyte for use in electrochemical systems such as batteries. These new solid polymer electrolytes exhibit lithium cation diffusion and lithium cation transport numbers that are superior to similar solid polymer electrolytes composed of polyethylene oxide.