Abstract: A two-part, snap-together captive panel fastener includes a ferrule portion and a screw sub-assembly which are attachable by snap fit. A locking mechanism prevents the unintended separation of the two components. The two-part structure of the present invention permits the ferrule which is preferably composed of a very hard and durable metal to be first wave-soldered to a printed circuit board with other elements of the board. Later, the screw sub-assembly can be snapped into the circuit board-mounted ferrule away for the harsh wave-soldering environment. The ferrule and screw retainer may further include cooperating outer flanges which captivate a pivoting structure such as a lever so that the panel fastener may not only be used to secure the attached panel to a sub-structure but may also affix other hardware to the panel.

Abstract: A system for identifying the relative location of devices.

Abstract: A power monitoring system with multiple current sensors.

Abstract: An electrical sensing device that includes a support and sensors supported by the support in a fixed spatial relationship.

Abstract: A system for monitoring respective electrical currents in a plurality of conductors, such as wires. The system may include first and second current sensors, each suitable for sensing the current in a respective conductor. The first sensor may provide a first signal representative of the current it senses to a current monitor. The second signal may provide a second signal representative of the current it senses to the first current sensor, which in turn, may provide the second signal to the current monitor.

Abstract: A power monitoring system with multiple current sensors.

Abstract: An electrical current sensing system having multiple current sensors.

Abstract: An electrical sensing device that includes a support and sensors supported by the support in a fixed spatial relationship.

Abstract: A system for identifying the relative location of devices.

Abstract: A security system (10), operable to produce an ALARM signal indicative of glass breakage in a region (16) in which a human being (24) may legitimately be present, has a human presence detector (12), a glass breakage detector (14), and an alarm signal activator (30) that includes a one-shot timer (52). A HUMAN PRESENCE DETECT signal (36, 38) output from the human presence detector triggers or retriggers the timer to produce an active output for a predetermined holdoff time interval T.sub.H. The active output causes a gate (58) to prevent a glass breakage alarm or GB DETECT pulse (46) from the glass breakage detector from reaching a control panel (34) and thus from triggering the ALARM signal if the GB DETECT signal occurs within the holdoff time interval after a HUMAN PRESENCE DETECT signal. Another gate (64) prevents a GB DETECT pulse (48) from reaching the control panel if that pulse occurs while the human presence detector is detecting human presence in the region (38).

Abstract: The subject matter of the invention is an apparatus for the integral sprinkling of liquids laden with solid materials in suspension of appropriate granulometry, such as a blanket of marc in wine-making, contained in a vat having a vertically movable cone (1) disposed at the bottom part (8) of a return pipe (2a) of constant section on which it slides by means of a sleeve (3) and is held by means of an arm (23) provided with a projection (4) resting on the periphery (5a) of a cam (5) affixed to a shaft (6) connected to a variable-speed electric motor (7) so that, during the continuous rotation of the motor (7) the cone (1) will be positioned at variable heights with respect to the bottom part (8) of the pipe (2) in order to sprinkle the surface integrally with the liquid, and to distribute a quantity of liquid in a uniform manner at any point on the blanket.

Abstract: Methods and apparatus for vibration-generated movement and manipulation, such as transportation, orientation, loading or sorting of materials are provided. At least one electromagnetic coil is disposed to act in a horizontal plane, and another electromagnetic coil may be disposed to act in a vertical plane, imparting two-dimensional vibration to a generally horizontal vibratory surface. Apparatus vibrationally transports parts across a surface while concurrently orienting and sorting them. Reversibility of transport direction is also provided.

Abstract: A system (100) performs concurrent testing and lead verification of an electronic component (104) having two leads (126 and 128). The system includes circuitry (114 and 116) for determining a sum of amounts of contact resistances between first (132) and second (134) probes and one of the leads by producing a current (I.sub.1) that propagates through the first probe, the lead of the component, and the second probe. The sum of the contact resistances is proportional to the difference in voltage between the leads. If the difference exceeds a limit, then the sum of the amount of contact resistances is excessive. The system also includes circuitry (110) for determining a value of a parameter of the component while the sum of the amounts of contact resistances is being determined. The circuit for determining the sum of the contract resistances and the circuitry for determining the value of the parameter are electrically isolated from each other so that they do not influence each other.

Abstract: The apparatus (20) includes electrically conductive contacts (44, 54) that are spaced apart a distance slightly less than the distance between the terminals (34, 36) formed on the components (24) to be tested. One contact (54) is held in position by a spring (112). The other contact (44) is stationary. The contacts (44, 54) slide against the terminal surfaces (52, 56) of the components (24) that are conveyed into a test location (26) between the contacts. The apparatus employs few moving parts and the sliding motion of the contacts (44, 54) against the terminal surfaces (52, 56) ensures that the contacts (44, 54) penetrate any oxide layer present on the terminal surfaces (52, 56). In an alternative embodiment (160), two sets of contacts (44L, 44T, 54L, 54T) are employed for testing components (24) in two adjacent test locations (26L, 26T).