Toroidal core winding method and automatic winding apparatus
Granted: May 6, 2003
Patent Number:
6557793
A toroidal core automatic winding apparatus has a winding ring positioned concentrically around a supply ring. The rings are C-shaped, by virtue of a through-slit on each ring. Wire wound on the supply ring is drawn out towards a toroidal core, via a wire guide on the winding ring. A ring rotation mechanism rotates the supply ring and winding ring in the same direction as that in which the supply ring was rotated when being loaded with the wire, but at mutually different speeds, to wind…
Reference table tilting mechanism
Granted: April 22, 2003
Patent Number:
6550401
A reference table tilting mechanism has a reference table which is supported by a plate spring and is adjusted of its angle of inclination by first and second angle adjusting machines constituted by an eccentric cam mechanism. Angles of inclination of the reference table in first and second directions are detected by first and second inclination angle sensors. Based on the detected angles by these sensors, the respective angle adjusting machines are feed-back controlled to make the angle…
Method of compensating periodic signals in sensor output
Granted: April 1, 2003
Patent Number:
6542842
A method of compensating periodic error signals in sensor output is provided. The method comprises obtaining a sum signal from sensing outputs of M sensor elements (where M is a positive integer), obtaining the amplitude and phase of N frequency components included in the sum signal, and calculating a sensing output gain adjustment coefficient for each sensor output. To ensure that a sum signal level obtained by summing a pre-adjustment output of each sensor element multiplied by the…
Negative deflection flexible meshing type gear device having passing tooth profile with maximized tooth height
Granted: March 4, 2003
Patent Number:
6526849
A flexible meshing type gear device includes a rigid internal gear, a flexible external gear and a wave generator, wherein the flexible external gear includes a cylindrical body and external teeth formed on the outer surface of the cylindrical body. The basic tooth profile of the flexible external gear having a flexing coefficient of smaller than 1 is given the shape of a convex arc, and a normal at the inflection point of the movement locus described by the center of the convex-arc…
Absolute sensor
Granted: February 25, 2003
Patent Number:
6524209
An absolute sensor 1 has a high speed side encoder 13 mounted on a high speed rotational shaft 6, a low speed rotational shaft 11 arranged coaxially with the high speed rotational shaft 6, a planetary gear mechanism 10 for reducing the speed of rotation of the high speed rotational shaft 6 and delivering the rotation of reduced speed to the low speed rotational shaft 11. The planetary gear mechanism 10 has a fixed sun internal gear a, a front stage planetary gear b, a rear stage…
Apparatus and methods of multiplexing data to a communication channel
Granted: December 3, 2002
Patent Number:
6490298
Apparatus and methods for multiplexing data received from a plurality of sources to a communication channel. Each of the sources is assigned to one of at least two scheduling layers based in part upon one or more bit rate characteristics of the sources.
Distributed termination system for two-way hybrid networks
Granted: December 3, 2002
Patent Number:
6490727
In hybrid fiber coaxial cable networks such as used in cable television where two-way digital communications are desired, a distributed termination system is provided. In such a system the home terminals are digital terminals, such as digital set-top boxes or cable modems using bi-directional transmission standards. The functionality of the head end controller in a conventional system is in this system distributed between the head end and the fiber nodes which link the coaxial cable and…
Flexible meshing type gear device having deflection meshing involute tooth profile
Granted: October 22, 2002
Patent Number:
6467375
A flexible meshing type gear device has a rigid internal gear, a flexible external gear disposed inside the internal gear and a wave generator for flexing the external gear into an elliptical shape. One circle of curvature at the point of contact of the involute curve making contact at the meshing center position is made coincident with a tooth profile circle of curvature satisfying the Euler-Savary equation that applies between the tooth profile curvatures at the tooth profile contact…
Multi-function type absolute converter
Granted: October 22, 2002
Patent Number:
6469651
A multi-function type absolute converter comprises a sensor I/O port having a plurality of sensor connection terminals that can be connected to a plurality of absolute sensors, a conversion circuit for converting absolute sensor detection signals input via the sensor connection terminals to digital position signals, a PLD that can perform prescribed processing on the digital position signals thus generated, a host I/O port having output terminals for outputting the digital position…
Digital video compressor with border processor
Granted: October 8, 2002
Patent Number:
6463102
In one embodiment, an edge or border processor modifies the undisplayed edges of an uncompressed video input signal before it is applied to a compression engine. This configuration reduces the number of bits used in the compression process. The undisplayed edges of the video signal are modified either by being turned black, by blurring, or by copying, depending on the application. As an aspect of this embodiment, the edge processing functions are integrated into the compression engine or…
Head rail-mounted actuator for window coverings
Granted: August 13, 2002
Patent Number:
6433498
A mini-blind actuator has a motor and a housing that holds the motor and a dc battery. The rotor of the motor is coupled to the baton of the mini-blind for rotating the baton and thereby opening or closing the slats of the mini-blind. Alternatively, the rotor is coupled to the tilt rod of the blind to rotate the tilt rod and thereby open or close the slats of the mini-blind. A control signal generator generates a control signal for completing the electrical circuit between the battery…
Secure broadband communication
Granted: March 26, 2002
Patent Number:
6363482
A system for secure broadband communication, including: (a) a server device for transmitting data; and (b) a client device including a broadband modem for receiving data, the broadband modem including: (i) a public hardware identification key for being sent to the server device, such that the client device is identified by the public hardware identification key and such that the server device permits transmission to the client device through the broadband modem according to the public…
Skylight assembly with head rail-mounted actuator
Granted: January 15, 2002
Patent Number:
6338377
A skylight assembly with head rail-mounted actuator includes a head rail having a shaft rotatably disposed therein. A battery-powered actuator is also disposed within the head rail and coupled to the shaft. The actuator is remotely operable to cause the shaft to rotate. As the shaft rotates, a collapsible shade connected to the shaft moves between an open configuration, wherein the shade is collapsed to allow sunlight to propagated through the skylight, and a closed configuration,…
Phase regulating apparatus
Granted: November 20, 2001
Patent Number:
6318210
A phase regulating speed reducer(20) in a phase regulating apparatus (100) has first and second cup-shaped wave gear gear drives (30,40). A first wave generator (33) for the first wave gear drive (30) is connected to a phase regulating motor. A first flexible external gear (32) and a second flexible external gear (42) of the second wave gear drive (40) are fixed together by a plurality of fastening bolts (60) so that these external gear are rotated together in a back-to-back state. A…
Piezo-electric drive arrangement for a harmonic drive transmission
Granted: November 13, 2001
Patent Number:
6314835
An apparatus and a method of rotatively empowering a harmonic drive transmission. The steps of the method include arranging a primary and a secondary cup-shaped flexspline co-axially within a rotatable rigid circular spline, and forming pivotable fingers in the secondary flexspline, biasing radially outwardly the pivotable fingers so as to contact and bias radially outwardly the primary flexspline in a sequential manner. The array of teeth between the primary flexspline and the circular…
Video transcoder with bitstream look ahead for rate control and statistical multiplexing
Granted: October 30, 2001
Patent Number:
6310915
A method is provided for transcoding, i.e., decoding, and re-encoding, a previously encoded video signal, to a second encoded representation. A number k>1 of previously encoded pictures of the previously encoded video signal are received in a buffer. Each of the k previously encoded pictures in the buffer is scanned to gather information on each of the k previously encoded pictures. An encoding parameter is allocated to a first one of the k previously encoded pictures which precedes…
Method and apparatus for eliminating noise in analog fiber links
Granted: October 16, 2001
Patent Number:
6304369
An optical transmission system that includes an optical amplifier coupled to the input of an optical modulator having at least two complementary output ports for providing complementary modulated optical output signals can be used such that the relative intensity noise (RIN) associated with the optical amplifier is coupled into the modulated optical output signals as common mode noise and can therefore be eliminated using a differential detection scheme. Removing the RIN associated with…
Small backlash planetary gear assembly
Granted: September 18, 2001
Patent Number:
6290625
A small backlash planetary gear assembly can achieve a large torque capacity while minimizing backlash. The small backlash planetary gear assembly has an assembly housing, an internal gear, a sun gear arranged inside of the internal gear in concentric fashion, a plurality of planet gears meshing with the internal gear and the sun gear, and a carrier rotatably supporting the planet gears. The internal gear includes an annular boss fixed to said assembly housing, a thin wall annular body…
Apparatus and method for broadband feedforward predistortion
Granted: September 4, 2001
Patent Number:
6285252
An amplifying circuit and associated method that outputs a distortion-free signal. The circuit includes an output amplifier driven by two intermediate amplifiers having differing gain factors. The intermediate amplifiers are coupled via an attenuator, a phase shifter, a signal splitter, and signal combiner and produces a predistortion signal that cancels the distortion signal generated from the output amplifier. Another similar amplifying circuit includes an additional combiner and…
Silk hat flexible engagement gear device
Granted: June 26, 2001
Patent Number:
6250179
A silk hat flexible engagement gear device (1) has first and second end plates (2, 3) and an input shaft (4) is rotatably supported, with their ends supported, between the tow end plates. An annular body (61) of a silk hat flexible external gear (6) is disposed on the outer circumference of the input shaft (4). A cross roller bearing (8) and a rigid internal gear (5) which also function as a device housing are arranged on the outer circumference. An cylindrical boss (64) of the flexible…
