Abstract: Methods and an apparatus to connect a peripheral device to a wireless network access point are provided herein. A host device associated with a wireless network access point stores and obtains a set of wireless credentials related to a wireless network formed by the wireless network access point. The host device opens a connection between the host device and the peripheral device to transmit the set of wireless credentials from the host device to the peripheral device. The host device identifies the peripheral device over the wireless network access point.

Abstract: Methods and an apparatus to connect a peripheral device to a wireless network access point are provided herein. A host device associated with a wireless network access point stores and obtains a set of wireless credentials related to a wireless network formed by the wireless network access point. The host device opens a connection between the host device and the peripheral device to transmit the set of wireless credentials from the host device to the peripheral device. The host device identifies the peripheral device over the wireless network access point.

Abstract: A chip tester for testing microelectronic circuit chips. The tester is capable of testing a variety of chip types in a single socket, including chips having different circuit functions, different pin configurations, and different number of pins. Tests are performed without any preliminary tester setup steps other than placing the chip to be tested into the test socket. The tester applies input voltages and output loads and monitors input and output signals for a first possible chip type, and upon failing to meet expected input/output measurement conditions, applies input voltages and output loads and monitors input and output signals for a second possible chip type. The process is repeated and continues until the monitored inputs/outputs for the chip under test meet the expected input/output measurement conditions, at which time a display device indicates that the chip under test is operational and, preferably, displays the chip type.

Abstract: A method and means for measuring and/or determining characteristics of a material by analyzing the characteristics of an energy beam incident upon and affected by the sample. Polarized radiant energy reflected and/or transmitted by the material sample is analyzed to infer optical properties such as index of refraction, and physical properties such as material thickness. The invention is not subject to the disadvantages of prior art measuring systems, in that absolute detected light values are not used, measurement of varying wavelengths of light are not necessary, surface defects contribute a balanced effect in the calculations so as to effectively cancel out, highly accurate angular measuring devices are not needed, precision nulling instruments are avoided, system parameter drift effects upon the measurement is avoided, inter alia.

Abstract: A spindle assembly is provided for rotatably supporting and driving a video information disc in a video recorder-playback machine. The spindle assembly comprises a vertically extending journal having a generally truncated conical shape and supported for rotation in an inverted position within a complementary shaped spindle housing. Pressurized air is supplied through a plurality of slotted flow paths to the support interface between the journal and the spindle housing for supporting the journal for relatively high speed rotation on a cushion of air.

Abstract: A video disc player assembly is described employing a fixed base member with a pair of fixed rails, and a movable carriage member employing a pair of linear bearing assemblies in engagement with said rails. A stabilization plate is mounted on the movable carriage for movement therewith. A motor and spindle assembly is mounted on the stabilization plate. A portion of the motor and spindle assembly extends through axially aligned apertures in the stabilization plate and carriage and carries a videodisc mounting surface coplanar with the stabilization plate. A centering means is provided to accurately center the disc about the spindle. A releasable clamp rigidly engages the spindle and holds the videodisc against the mounting surface parallel to the stabilization plate. A motor and spindle are mounted on the carriage for rotary driving of the video disc, a centering means is provided to accurately center the disc about the spindle, and a stabilization plate is provided adjacent and parallel to the rotating disc.

Abstract: A servo control system for maintaining an information detection device, such as a light beam, centered on a moving information track, such as a spiral recording track on a video disc. The system of the invention includes a dither signal generator, a bandpass filter for deriving an intermediate signal indicative of the effect of dither on the detected signal derived from the information track, and switching circuitry for deriving an error signal from the intermediate signal and the polarity of the dither signal. In one embodiment of the invention, the switching circuitry includes an inverter, and a switch for selecting either the intermediate signal or the inverted intermediate signal, in accordance with the polarity of the dither signal. The error signal thus derived is low-pass filtered and has a positive value when the center position of the beam moves to one side of the track, and a negative value when the center position of the beam moves to the other side.

Abstract: A transducer head assembly supported above a surface has the spacing of its transducer head from the surface maintained at a predetermined value by a pressure-sensitive regulator which responds to changes in fluid flow pressure resulting from spacing changes to correct variations from the predetermined spacing. The assembly includes a pair of expandable chambers which are coupled to each other through a fluid restrictor and which carry the transducer head, the expandable chambers being sensitive to pressure changes and causing the transducer head to move toward and away from the surface in response to such changes to correct the fluid flow pressure.