Abstract: An anti-strangulation apparatus for, and hanging freely with, a looped cord of a window covering device. The apparatus includes a tube. The tube at first has the looped cord of the window covering device enter therein, then has the looped cord of the window covering device exit therefrom and run therealong, and then has the looped cord of the window covering device reenter therein again where the looped cord of the window covering device is reeved, and in so doing, the anti-strangulation device is allowed to hang freely with the looped cord of the window covering device and keep the looped cord of the window covering device snug enough against the tube to prevent strangulation by the looped cord of the window covering device, while allowing the looped cord of the window covering device to remain fully operational.

Abstract: A tri-vent awning window for absorbing sunlight heat in warm weather that otherwise would flow uncontrolled therethrough and discharging the sunlight heat to the atmosphere while permitting relatively unobstructed vision therethrough and passing the sunlight heat in cold weather therethrough for thermal warming. The tri-vent awning window includes a frame, an inner pane, an outer pane, and a heat sink. The inner pane is replaceably mounted to the frame so as to form a first vent. The outer pane is pivotally mounted to the frame so as to form a second vent, and is spaced from the inner pane so as to form a space therebetween. The heat sink is removably mounted to the frame, in the space, and when removed, creates a passive solar application. The inner pane has an in-place position and the outer pane has an open position during which in the warm weather the sunlight heat hits the heat sink and passes therethrough and rises by convection.

Abstract: An anti-strangulation apparatus for, and hanging freely with, a looped cord of a window covering device. The apparatus includes a tube. The tube at first has the looped cord of the window covering device enter therein, then has the looped cord of the window covering device exit therefrom and run therealong, and then has the looped cord of the window covering device reenter therein again where the looped cord of the window covering device is reeved, and in so doing, the anti-strangulation device is allowed to hang freely with the looped cord of the window covering device and keep the looped cord of the window covering device snug enough against the tube to prevent strangulation by the looped cord of the window covering device, while allowing the looped cord of the window covering device to remain fully operational.

Abstract: A window for absorbing sunlight heat in warm weather that otherwise would flow uncontrolled therethrough and discharging the sunlight heat to the atmosphere while permitting relatively unobstructed vision therethrough and passing the sunlight heat in cold weather therethrough for thermal warming. The window includes a frame, an inner pane, an outer pane, and a heat sink. The inner pane is pivotally mounted to the frame. The outer pane is affixed to the frame and spaced from the inner pane so as to form a space therebetween.

Abstract: The present invention provides a system for controlling a window covering device comprising a body adapted for mounting adjacent to a window and a weight. The body includes a channel and an entry aperture. The entry aperture is adapted for entry of at least one cord of the window covering device into the channel and the weight is adapted for movable attachment to the at least one cord.

Abstract: A dental teaching and practicing simulator comprising a stationery work bench having a work surface and a completely enclosed storage compartment. The storage compartment has a door with locking means thereon to restrict access to the storage compartment. The dental simulation and teaching equipment is mounted on a slide mechanism which can be stored within the compartment and slid out therefrom for utilization. The dental simulation and teaching equipment comprises a mannequin head, a torso, handpieces, and vacuum tools which are normally used in dentistry. The dental simulation and teaching equipment can be stored and locked in the storage compartment such that access thereto is limited. Thus, a safe and secure environment is provided for the equipment until its authorized use.

Abstract: A self-contained portable device for collecting dust and other particulate matter or the like. There is a housing with partially open sides sufficiently large to allow the entrance of an operator's hands. A sensor is activated when the operator's hands are placed within the device. The sensor activates the vacuum motor and light source so that the work area is illuminated and particulate matter and dust can be drawn away from the work area. A removable and disposable filter bag collects the dust particles and can be disposed of when full. The operator does not come in contact with any contaminated dust or particulate matter in disposing of the filter bag.

Abstract: A method and apparatus for remotely calibrating a system having a plurality of N elements, such as a phased array system, is provided. The method includes generating coherent signals, such as a calibration signal and a reference signal having a predetermined spectral relationship between one another. The calibration signal which is applied to each respective one of the plurality of N elements can be orthogonally encoded based on the entries of a predetermined invertible encoding matrix, such as a binary Hadamard matrix, to generate first and second sets of orthogonally encoded signals. The first and second sets of orthogonally encoded signals and the reference signal are transmitted to a remote location. The transmitted first and second sets of orthogonally encoded signals are coherently detected at the remote location.

Abstract: A multi-channel electronic communication system with equalized channels comprises a reference channel and a plurality of object channels. A white noise excitation signal is injected into each channel. Each of the channels is sampled and, for each channel, the resultant samples are windowed and the windowed samples are Fast Fourier Transformed from the time domain to the frequency domain. Power spectral density estimates are determined for each object channel from the windowed samples in that channel. Cross-spectral density estimates for each object channel with respect to the reference channel are determined from the windowed samples in that object channel and the windowed samples in the reference channel. The power spectral density estimates are divided by the cross-spectral density estimates to derive correlation ratios which are converted back to the time domain to specify a corrective equalization filter weight vector for each object channel.

Abstract: A small target phased array Doppler detection system receives signals from remote moving targets and determines Doppler frequency shift and the respective powers of coherent electromagnetic signals for the purpose of detection and identification of relatively small, slow moving targets in the presence of scattering echoes due to clutter. The system employs covariance analysis of the received signals followed by eigenanalysis to produce eigenvectors and eigenvalues. A superresolution algorithm creates dwell manifold vectors which indicate velocities of targets from the eigenvectors. The relative power of radar echoes contribute information relevant to the identification of real moving targets as opposed to false alarms.

Abstract: A heat sink in the form of a mesh is interposed between two spaced panes in a window or door light. A combination of holes and passageways formed in the window sash frame members permit the selective establishment of convective air currents past the mesh to absorb the solar converted thermal heat stored in the sink. By manipulating the source of the air for these convective currents (i.e. from the inside or the outside of a building) and by choosing the volume into which the warmed air currents are to be discharged (i.e. inside or outside the building) significant heating and cooling efficiencies are achieved.

Abstract: An illustrative embodiment of the invention discloses a solar energy system for a building. A plurality of interlocked thermally conductive flat solar energy collecting plates form a portion of the building's surface. Each of these plates has a web which is generally perpendicular to the web surface. This web supports a suitable tube which is received in notched rafters. The tube contains working fluid which absorbs thermal energy collected by the plates and transfers it to storage or to air flowing in a duct which is formed in the building or structure between a sheet which is attached to the opposite side of the rafters and the flat solar collecting plates which provide one surface of the building.

Abstract: Illustratively, a portion of a thin sheet of high thermal conductivity material is wrapped in tight thermal communication about the external surface of a working fluid conduit. A hinged male die presses part of the portion of the sheet into a semi-cylindrical female mold. The die is removed and the fluid conduit is placed in the semi-cylindrical sheet. Another hinged mold, with the aid of a drawing up mechanism bend the balance of the sheet portion into thermal communication with the hitherto exposed conduit surface. Beveled mold edge also exposes a seam for joining the sheet portion to the balance of the sheet.

Abstract: A sensitivity time control circuit for radar receivers, using range gated feedback where the video signal is sampled and compared to a desired signal at intervals based upon range sweep; as the radar antenna is reversing direction, integrated averages of the video signal are used to update the sensitivity time controlled waveform.

Abstract: A method and apparatus for collecting solar energy adapted for use with overlapped roof shingles on the roof or side of a building comprising thin flexible metal plates interposed between the overlapped shingles in heat transfer relation therewith such that heat absorbed by the shingles is transferred to the metal plates. The plates extend through the roof via slots provided therein and are affixed in heat transfer relation with pipes containing a fluid.

Abstract: Illustratively, a portion of a thin sheet of high thermal conductivity material is wrapped in tight thermal communication about the external surface of a working fluid conduit. A hinged male die presses part of the portion of the sheet into a semi-cylindrical female mold. The die is removed and the fluid conduit is placed in the semi-cylindrical sheet. Another hinged mold, with the aid of a drawing up mechanism bend the balance of the sheet portion into thermal communication with the hitherto exposed conduit surface. Beveled mold edge also exposes a seam for joining the sheet portion to the balance of the sheet.