In one embodiment, a tool (10) used for creating grooves in a microreplication tool (32) is described The tool (10) includes a mounting structure (14) and a multi-tipped diamond (12) mounted in the mounting structure (14) The different tips (16A, 16B) of the diamond may correspond to different grooves to be created in the microreplication tool (32) In this manner, the creation of a microreplication tool (32) using a diamond can be simplified and/or improved

Diamond tool with a multi-tipped diamond

A delivery device(10) adapted to insert and deploy a stent (42) within a body lumen. The delivery device (10) includes a guide member (12) adapted to retain a dilation assembly (40) and a stent (42) within a lumen thereof until the stent is to be deployed into the body lumen. The delivery device (10) is configured to enable simultaneous insertion of the guide member (12), dilation assembly(40) , stent (42), and optional guidewire within a body lumen. Following deploying the stent (42), the delivery device can be removed, while providing the capability of optionally maintaining the guide member(12) or the guidewire to function or act as an exchange wire for additional surgical devices.

Stent delivery device with embolic protection

In one embodiment, a cutting tool assembly (10) used for creating grooves in a microreplication tool (72a) is described. The cutting tool assembly includes a mounting structure (10) and multiple diamonds (12, 13) mounted in the mounting structure (14). For example, first and second tool shanks having first (17)and (18) second diamond tips can be positioned in the mounting structure (14) such that a cutting location of a diamond cutting tip of the first tool shank is a defined distance from a cutting location of a diamond cutting tip of the second tool shank. The defined distance (y) may correspond to an integer number (x) of pitch spacings, and may be accurate to within a tolerance of less than 10 microns.

Multi-diamond cutting tool assembly for creating microreplication tools

A video disc player has two fields of buffer storage for implementing special effects. Video signal recovered from a disc record is directed into respective ones of the buffer stores for subsequent replay in particular sequences. A fixed memory device, containing a plurality of sequences of preprogrammed data words, each sequence defining a particular player function, controls the operable mode of the respective buffer storage devices. The preprogrammed sequences are addressed by a binary counter responsive to the vertical synchronization components of signal recovered from the disc record. Particular variable speed display options are effectuated by the repeated playback of selected TV fields and the omission of intervening fields.

Video disc vari-speed playback system

Magnetic disk apparatus includes an electric wiring capable of satisfying an electric condition under which high frequency recording higher than or equal to 200 MHz, a magnetic head having at least a recording device to a magnetic recording medium, and also the electric wiring corresponding to a recording current supplying device to this magnetic head are formed on a suspension member for mechanically suspending the magnetic head, the recording current being supplied to a magnetic head recording device by employing such electric wiring, the characteristic impedance of which is higher than a maximum impedance of the magnetic head recording device.

Magnetic disk drive

A signal pickup stylus which cooperates with an information storing spiral track on a video disc record is caused to selectively skip track convolutions of the disc record. To cause selective track skipping, the playback system includes an apparatus, responsive to an actuating signal, for twisting a stylus-carrying arm about its longitudinal axis, and the offset of the stylus tip from the rotational axis results in consequent radial motion of the stylus tip across track convolutions on the record. According to a further aspect of the invention, the lateral motion of the stylus-carrying end of the stylus arm is substantially restrained while the stylus arm is rotated to assure that the twisting of the stylus arm results in rotation of the stylus about the stylus arm axis, rather than rotation of the stylus arm about the stylus tip.

Track skipper for a video disc player

Frequency modulated sound carrier waves and frequency modulated picture carrier waves are combined in an adder, and the sum is clipped to develop a recording signal input for an electron beam disc recorder. To reduce possible sound carrier interference in pictures reproduced from signals recovered during disc playback, sound carrier waves, in quadrature phase relation to those applied to the adder, are combined with composite video signals to form the modulating signal input to the picture carrier frequency modulator.

Video disc recording apparatus and methods

Color picture information is recorded on a video disc together with multiple channels of sound information (e.g., a pair of stereo sound signal components). Each audio signal to be recorded modulates the frequency of a respectively different sound carrier over a respectively different low frequency deviation range. Picture carrier waves are frequency modulated in accordance with composite color video signals, including a luminance component and a chrominance component (the latter comprising a modulated color subcarrier buried in the midband of the luminance component). The duty cycle of the modulated picture carrier waves is varied in accordance with the sum of the respective frequency modulated sound carriers to form a recording signal. The color subcarrier frequency, and the respective sound carrier center frequencies correspond to different odd multiples of half the line frequency. The sound carrier deviation ranges lie below (but near) the band occupied by the chrominance component, and below the first order sideband of the modulated picture carrier. The black-representative picture carrier frequency is separated from the chrominance band upper boundary by a frequency substantially corresponding to the highest video signal frequency. A disc record is developed with a pattern of depressed and non-depressed regions in its groove bottom representative of the recording signal. Playback apparatus recovers from the disc record a playback signal of the general form of the recording signal. Respective bandpass filters, with passbands centered about the respective sound carrier deviation ranges, select playback signal portions for application to respective sound carrier FM demodulators. Additional filter, with passband encompassing picture carrier deviation range and first order sideband therefor, supplies input to picture carrier FM demodulator. Video signal processing circuits, responsive to output of picture carrier FM demodulator, include respective comb filters for selectively passing respective luminance and chrominance components.

Color-picture/multichannel-sound record and recording/playback apparatus and methods therefor

A stylus support element of dielectric material (e.g., sapphire) has a tip formed with a tapering, flat rear face, having converging straight edges which terminate in a curved bottom edge. Sides of the support element tip extend in converging fashion toward a narrow stylus front, while a curved surface, extending forward from the bottom of the rear face with a gradually diminishing width, forms the bottom of the support element. The rear surface of the support element is coated with a thin layer of conductive material (e.g., hafnium) which forms a stylus electrode. Overlying the conductive layer is an additional layer of dielectric material (e.g., aluminum oxide) having a thickness which is large relative to the thickness of the conductive layer, but small relative to the length of the curved bottom of the stylus support element. In use of the stylus in video disc playback apparatus, the stylus tip is received in the groove of a disc having a conductive surface covered with a dielectric coating. As geometric variations of the groove bottom, representative of recorded picture and sound information, pass beneath the stylus, the capacitance between the stylus electrode and the disc''s conductive layer varies. The capacitance variations are converted to electrical signal variations representative of the recorded information. Presence of the dielectric overcoating on the stylus electrode establishes a degree of symmetry for the stylus response, that eliminates or reduces spurious effects of sound interference with picture information that may be encountered in the absence of the overcoating use.

Video capacitive disc playback apparatus and stylus with dielectric coating therefor

A video disc record of the constant angular velocity type (CAV) includes a spiral groove of constant pitch formed in a band on a surface thereof. The groove has a substantially constant nominal vertical dimension and vertical displacements which taper monotonically from an outer radius of the band to an inner radius. One component of the vertical displacement of the groove conveys an FM carrier wave of constant amplitude and relatively high frequency representative of picture information. A second component of the vertical displacement conveys one or more lower frequency FM carrier waves representative of sound information. The amplitude of the second component varies monotonically as a function of the groove radius within the record band to provide a disc having an improved audio FM carrier-to-noise ratio with no substantial perceptible increase in undesirable sound beat effects in images displayed when the disc is played. A mastering system exemplary of the method of forming the grooved disc includes variable gain units in an audio FM carrier wave processing path of the system.

Richard C. Palmer

Papers

Track skipper for a video disc player

Video disc recording apparatus and methods

Color-picture/multichannel-sound record and recording/playback apparatus and methods therefor

Video capacitive disc playback apparatus and stylus with dielectric coating therefor

Disc record with tapered groove