Abstract: An antenna structure is described that includes a flexible substrate and at least two antenna elements being formed from conductive traces on a layer of the flexible substrate. The antenna structure also includes a plurality of conductive traces formed on the layer of the flexible substrate with a first subset being electrically coupled as a lead in to a first one of the antenna elements and a second subset of the plurality of conductive traces being electrically coupled as a lead in to a second one of the antenna elements, wherein the first subset and the second subset are separately coupled electrically to one connector after insertion of an edge of the flexible substrate into the connector. An apparatus is described that includes a case, an electronic assembly, including a printed circuit board and a support bracket, contained within the case. The apparatus further includes the antenna assembly as described herein.

Abstract: An antenna for reception and transmission of signals within an enclosure. The antenna includes a first lead for connection to a printed circuit board and a second lead. A plurality of vertical members extend in parallel to one another and spaced a predetermined distance apart. Each vertical member has a first end and a second end. A plurality of horizontal members is provided. Each horizontal member extends alternately between first ends of a pair of adjacent vertical members and second ends of a next pair of adjacent vertical members forming a connection between said first lead and said second lead.

Abstract: A sensor, a wireless transceiver and a battery that energizes the transceiver are installed together in a cavity formed in a frame of a door. They are displaced together in the cavity in accordance with the deadbolt position in a direction of displacement of a door deadbolt. A spring that is installed in the cavity accommodates differences among travel distances and differences in lengths of different deadbolts and also differences in gaps between doors and door frames.

Abstract: An antenna for reception and transmission of signals within an enclosure. The antenna includes a first lead for connection to a printed circuit board and a second lead. A plurality of vertical members extend in parallel to one another and spaced a predetermined distance apart. Each vertical member has a first end and a second end. A plurality of horizontal members is provided. Each horizontal member extends alternately between first ends of a pair of adjacent vertical members and second ends of a next pair of adjacent vertical members forming a connection between said first lead and said second lead.

Abstract: A Coriolis-type fluid flow rate measuring system splits a fluid flow that is to be measured into two equal half flows and passes the same respectively through two physically similar conduits which are oscillated about respective parallel oscillation axes. Analog sinusoidal signals corresponding to relative velocity of motion between the two conduits are obtained at two locations, the analog signals a digitized, and a conventional microprocessor is used to apply a least-squares sine fit to the digitized data to determine to a very high degree of accuracy a phase shift between the signals. An empirical proportionality factor is determined for the system to relate phase shift to fluid flow rate and is used to determine the fluid flow rate. The least-squares sine fit provides an accurate, economically computed fluid flow rate, and the apparatus is highly insensitive to temperature induced effects, harmonic distortions, and the combined effects of noise and harmonic distortion.