Abstract: A dynamic chair providing automatic motion in a seat. The chair has bottom, a support means disposed between the base and the seat bottom, a drive motor. A first drive wheel driven by the drive motor has a first mounting point offset from a first distance from the center of the first drive wheel; a second drive wheel driven by the first drive wheel, the second drive wheel having a different diameter from the diameter of the first drive wheel; and a crankshaft having a first crankshaft end and a second crankshaft end, the first crankshaft end connected to the second drive wheel and rotatably driven by the second drive wheel, the second crankshaft end having an eccentric providing a second offset mounting point offset from a second distance from the center of the second crankshaft end.

Abstract: The present invention provides a dynamic chair having a deterministic motion path that allows a variety to different paths to be selected depending of needs of user. By changing the ratio between drive wheels that control the pitch and roll of the seat, motion paths can be selected to help a person assume and/or avoid certain postures while seated. Embodiments of the present invention move the seat of the dynamic chair through a deterministic path to dictate how often and when the seat is in a level position with respect to pitch and roll.

Abstract: The present invention provides a dynamic chair having a deterministic motion path that allows a variety to different paths to be selected depending of needs of user. By changing the ratio between drive wheels that control the pitch and roll of the seat, motion paths can be selected to help a person assume and/or avoid certain postures while seated. Embodiments of the present invention move the seat of the dynamic chair through a deterministic path to dictate how often and when the seat is in a level position with respect to pitch and roll.

Abstract: A security electronic system comprises a monitoring/communication device mounted to a cap that removeably closes a housing. The housing is hung by a flexible obedient cable from a building ceiling or the like such that the monitoring device is proximate a target area. The flexible obedient cable is bendable to adjust the location of the monitoring device, but the flexible obedient cable indefinitely maintains the monitoring/communication device at the proper location. The monitoring/communication device may be a fixed or variable focus camera in monochrome or color, infrared illuminator/lighting, motion sensor, low voltage lighting, smoke detector, speaker audio unit, or other device that is back-mounted to the cap. Target areas remote from each other are serviced by separate distribution points, which minimizes the length of the necessary wires.

Abstract: A load port interface (20) receives, opens and closes a wafer carrier (22). A bulkhead (24) carries a changeable mating plate (92) that is pierced by a window (94). Changing the mating plate (92) adapts the load port interface (20) for use with different sizes of carriers(22). A table (32) of the load port interface (20) receives the carrier (22), advances the carrier (22) until it abuts and seals to the bulkhead (24). An end-effector (42), located on an opposite side of the bulkhead (24) from the carrier (22), actuates latch keys (54) to unlatch a door (48) from the carrier (22). The load port interface (20) then moves the unlatched door (48) rectilinearly, first horizontally away from the bulkhead (24) and then vertically downward, to expose semiconductor wafers (48) present within the carrier (22). The end-effector (42) includes sensors (86, 104) for collecting data about wafers (82) within the carrier (22) by detecting edges (118) thereof.