| Patent Number |
Title Of Patent |
Date Issued |
| D322264 |
Foldable portable overhead projector |
December 10, 1991 |
|
| 7225965 |
Multiple probe power systems and methods for ultrasonic welding |
June 5, 2007 |
| An ultrasonic welding probe power supply for powering more than one ultrasonic welding probe with power is provided. The power supply is adapted to provide power only to one welding probe at a time. A ringdown period is monitored between termination of provision of power to a first p |
| 6984921 |
Apparatus and method for resonant mounting of vibration structure |
January 10, 2006 |
| A mount for a vibration structure includes a ring having a flexural portion defining an arcuate mounting surface terminating at a free distal end and secured to an arcuate bearing surface on a flange of the vibration structure in coaxial bearing engagement therewith, the flexural por |
| 5880580 |
Automatic regulation of power delivered by ultrasonic transducer |
March 9, 1999 |
| An ultrasonic generator has an output circuit for delivering ultrasonic power to a load through a transducer, the generator having an amplitude control input coupled to the output of a comparator, the inputs of which are coupled to a user interface circuit. The output circuit produces |
| 5798599 |
Ultrasonic transducer assembly using crush foils |
August 25, 1998 |
| A pre-stressed, sandwich-type, ultrasonic transducer assembly includes front and rear mass members having stacked therebetween alternating piezoelectric members and electrode members, with each of the members having surfaces which are substantially flat except for minute surface irre |
| 5295700 |
Workpiece support assembly for microrobotic apparatus |
March 22, 1994 |
| A compliant workpiece support assembly for a microrobotic apparatus for aligning three workpieces and welding them into an assembled package, includes a lower support assembly having a ball and socket joint with a polymer ball seat cast around the ball. The ball has a radial bore con |
| 4969733 |
Foldable portable overhead projector |
November 13, 1990 |
| A portable foldable overhead projector includes a housing having a front opening communicating with an interior cavity, and a bottom aperture communicating with the cavity and closable by a pair of pivoting doors which, when open, support the housing on support legs and accommodate m |
| 4914290 |
Method and apparatus for measuring of microdistances |
April 3, 1990 |
| Microdistances may be measured between a pair of objects such as a laser diode and an optical fiber end extending toward the diode. One orients the ends of a light emitting fiber and a light sensing fiber for the light sensing fiber to sense light from the emitting fiber. One moves the f |
| 4838639 |
Method and apparatus for orienting a fiber optic member |
June 13, 1989 |
| A frame assembly for holding and orienting a fiber optic member is provided. The assembly comprises tubular means having a bore proportioned to slidingly receive a fiber optic member. The tubular means carries outwardly projecting flange means. U-shaped retainer means is proportioned |
| 4651112 |
Audio amplifier system |
March 17, 1987 |
| An audio amplifier system is provided including a transformer having a first primary winding that is center-tapped, a second primary winding and a secondary winding. The amplifier system includes a battery backup system by connecting a battery to the center tap of the first primary windi |
| 4331397 |
Front/rear projection system |
May 25, 1982 |
| A filmstrip viewer/projector unit includes two separate projection lenses, one for front projection on a remote screen and the other for rear projection on a small local viewing screen built into the unit. A film carrier has two separate apertures therein respectively disposed in opt |
| 4277710 |
Control circuit for piezoelectric ultrasonic generators |
July 7, 1981 |
| A high power ultrasonic generator for driving a transducer/horn assembly includes a transistor bridge inverter power output circuit connected to a DC source for producing an alternating output current. A pulse generating circuit produces a bipolar train of pulses for controlling the swit |
| 4257730 |
Stand device for boom-type working implements |
March 24, 1981 |
| A device for a boom-type working implement which has a working member and a connector both attached to a boom and which is connectable to a tractor by the connector. The device comprises a stand member having one end pivoted to the boom and the other end provided with a ground engaging p |
| 4208001 |
Ultrasonic metal welding apparatus |
June 17, 1980 |
| Apparatus for use with an ultrasonic plastic welder in which an ultrasonic horn on a movable welding head produces sonic vibrations along a first axis generally normal to the contacting surfaces of the workpieces to be welded together, the apparatus rendering the welder suitable for weld |
| 4131505 |
Ultra-sonic horn |
December 26, 1978 |
| A large solid horn has an energy output and an energy input. The output is useful for application to a load. The horn is provided with a groove in the horn side surface about the horn axis and is preferably located nearer the output end thereof. This groove functions to correct fall off |
| 4064462 |
Acoustic feedback peak elimination unit |
December 20, 1977 |
| This invention is an acoustic feedback peak elimination unit and has as its objective the elimination of unwanted acoustic resonance peaks, also called ring modes, inherent in an enclosed region where a sound amplifying system may be used. A number of separate units embodying the present |
| 3985957 |
Sound masking system for open plan office |
October 12, 1976 |
| This invention relates to a system for masking conversation in an open plan office. A conventional generator of electrical random noise currents feeds its output through adjustable electric filter means to speaker clusters in a plenum above the office space. Each cluster has two speakers |
