Flat wave gear drive
Granted: December 22, 1998
Patent Number:
5850765
A flat wave gear drive (1) which has an input shaft (4) supported rotatably at both ends portions thereof between first and second end plates (2, 3). A wave gear mechanism is incorporated between these end plates (2,3), and a cross roller bearing (8) is provided on an outer circumferential side of the wave gear mechanism. The wave gear mechanism comprises a rigid internal gear (5), a silk-hat-shaped flexible external gear (6) provided on the inner side of the internal gear, and an wave…
Multi-tone phase modulation for light wave communication system
Granted: October 27, 1998
Patent Number:
5828477
An optical transmission system enables launching at least 17 dBm of optical power at 1550 nm wavelength into an e.g. 50 km long span of standard telecommunications single-mode optical fiber, without incurring unacceptable penalties from stimulated Brillouin scattering, damage to optical phase modulators from excessive drive power or thermal effects, or signal degradations caused by the SBS suppression. High frequency modulation of the laser drive current is combined with lower frequency…
Flexible meshing type gear device with negative deflection passing tooth profile
Granted: July 21, 1998
Patent Number:
5782143
The amount of radial flexing (w) in a basic section defined perpendicular to the axis of the flexible external gear (3) at a prescribed point on the tooth trace of the flexible external gear (3) is defined to be an amount of negative deviation flexing smaller than the normal amount of flexing (W.sub.0) The rigid internal gear (2) and the flexible external gear (3) are both spur gears and the number of teeth of the flexible external gear (3) is 2n (n being a positive integer) fewer than…
Wave gear device
Granted: July 7, 1998
Patent Number:
5775178
A wave gear device has a circular spline, a flexspline arranged within the circular spline, and a wave generator disposed within the flexspline for deflecting the flexspline in radial direction for partially engaging external tooth formed on the flexspline with internal gear teeth formed on the circular spline and shifting an engaging position in circumferential direction to cause relative rotation depending upon difference in number of teeth of the internal gear teeth and the external…
Head rail-mounted actuator for window coverings
Granted: March 17, 1998
Patent Number:
5729103
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…
Suspension cord winding device for window covering
Granted: March 10, 1998
Patent Number:
5725040
A suspension cord guide for a window blind includes an L-shaped guide member positioned within the head rail of the blind. The guide member is positioned adjacent an opening in the head rail through which the suspension cord extends. Also, the suspension cord guide includes a hollow spindle surroundingly engaged with a tilt rod in the head rail, and the spindle is formed with an abutment surface on its end nearest the opening. A finger of the L-shaped member extends toward the spindle,…
Harmonic flexible meshing gear device
Granted: February 10, 1998
Patent Number:
5715732
The silk-hat-shaped flexible external gear (13) of a silk-hat flexible meshing gear device (11) comprises a body (22), a diaphragm (23) and a boss (25). Between the main portion of the body (22) and a curved portion (222) is formed a thinned portion (221) whose thickness is about 80% that of the main portion. The thickness of the diaphragm (23) is defined to be largest at the inner edge (point A), smallest at the middle portion (point B) and slightly smaller than the largest thickness at…
Head rail-mounted actuator for window coverings
Granted: February 3, 1998
Patent Number:
5714855
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…
Head rail-mounted actuator for window coverings
Granted: December 16, 1997
Patent Number:
5698958
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…
Flexible meshing type gear device with a passing tooth profile
Granted: November 18, 1997
Patent Number:
5687620
In a meshing type gear device (1), spur gears are used for both a rigid internal gear (2) and a flexible external gear (3), and the number of teeth of the flexible gear (3) is made greater by two than that of the rigid internal gear (2). The tooth profile of the flexible external gear (3) is made convex and the shape thereof is that of a curve AC obtained by subjecting a gear tooth portion (curve portion between A and B), which, at the moving path L that the external gear describes…
Control circuit and method for direct current controlled attenuator
Granted: August 12, 1997
Patent Number:
5656978
A bridge T attenuator which includes PIN diodes in both the bridge arm and in the shunt arm, and in which the current through the shunt arm is controlled with respect to the current through the bridge arm, so that the product of these two currents equals a constant. This is accomplished by a feedback loop. Thus a relatively simple, inexpensive, and entirely analog solution is provided for a bridge T attenuator to be used with a radio frequency signal, so that a prescribed level of…
Hermetically sealed harmonic drive transmission manufacture
Granted: July 1, 1997
Patent Number:
5642645
The present invention comprises a harmonic drive transmission assembly for use in contamination free manufacturing fields such as computer chip making. The harmonic drive unit includes a flexspline having a diaphragm at one end and an outwardly flared lip adjacent its other end which is integrally connected to a mounting flange. The flexspline including the diaphragm and mounting flange are all integral with one another, all being machined from a single piece of steel bar stock.
Angular acceleration detector
Granted: July 23, 1996
Patent Number:
5537874
An angular acceleration detector (10) is provided with two slit-carrying discs (14, 15) mounted fixedly and coaxially in an opposed state on a rotary body (13), and a semiconductor position detecting unit (19) formed as a detecting means and consisting of a light emitting element (20) and a semi conductor position detecting member (21) which are disposed in an opposed state across the slits in these discs, the angular acceleration of the rotary body being detected by using this detecting…
Head rail-mounted mini-blind actuator
Granted: May 14, 1996
Patent Number:
5517094
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…
Head rail-mounted mini-blind actuator for vertical blinds and pleated shades
Granted: February 27, 1996
Patent Number:
5495153
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…
Tertiary negative-deviation flexing contact type gear drive of non-profile-shifted tooth profile
Granted: January 23, 1996
Patent Number:
5485766
In a cup-shaped flexing contact gear (1), both a rigid internal gear (2) and a flexible external gear (3) are made to be non-profile-shifted spur gears, an opening (3a) of the flexible external gear (3) is set in a state of negative deviation wherein a deflection of the opening is lower in value than a normal deflection; a moving locus is obtained through rack approximation of teeth of the external gear to the internal gear at respective sections of rotation of tooth trace of the…
Flexing contact type gear drive of non-profile-shifted two-circular-arc composite tooth profile
Granted: October 17, 1995
Patent Number:
5458023
In a flexing contact type gear drive (1), the respective tooth profiles of the internal gear (2) and external gear (3) are constructed such that the tooth face portion is formed of a straight line AM disposed in the vicinity of a datum point, a first convex circular arc (AB) smoothly connected thereto and a second convex circular arc (BC) smoothly connected to the first convex circular arc and having a radius of curvature larger than the first convex circular arc, while, the dedendum…
Mini-blind actuator
Granted: August 22, 1995
Patent Number:
5444339
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. A control signal generator generates a control signal for completing the electrical circuit between the battery and the motor. The control signal can be generated in response to a predetermined amount of daylight or in response to a user-generated remote…
Remote control unit for operating window blinds
Granted: August 8, 1995
Patent Number:
D361058
Externally mounted operating device for operating window blinds
Granted: June 20, 1995
Patent Number:
D359410
