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Attorney: Koppel & Harris


Number of patents: 64
Last date: May 09, 1989

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NumberTitleIssue Date
4829305Medium distance measurement system and method
A system and method are disclosed for measuring medium range distances, of about 1-10 meters, to a target. A transmission signal is reflected off the target, with the phase difference between the transmitted and received signals taken as an indication of ...
05/09/1989
4757274Input compensation circuit for superbeta transistor amplifier
An improved input current compensation circuit is provided for a dual branch amplifier, particularly an amplifier employing superbeta transistors. The compensation circuit has a superbeta compensation transistor which is matched with the superbeta amplifi...
07/12/1988
4724766Cluster bomb system and method
Each bomblet within a cluster bomb is provided with an individually programmable detonation time delay, such that the bomblets can be programmed to detonate at desired intervals over a relatively long period of time. Program signals are transmitted to a n...
02/16/1988
47053713-D method and apparatus
A method for creating a 3-D effect is disclosed in which a scene is recorded with a relative lateral movemnet between the scene and the recording mechanism. The recording is played back and viewed through a light filter which has a greater optical density...
11/10/1987
4704727Low noise and distortion FM transmission system and method
An FM transmission system and method in which a gain control signal is generated and used to encode the audio signal in accordance with a predetermined compression curve. At the receiver the gain control signal is recovered and used to decode the audio si...
11/03/1987
4696062Fiber optic switching system and method
A fiber optic switching system and method is described which is capable of rapidly switching among a number of closely spaced optical rods for optical connection with a communications channel, while alleviating alignment problems caused by vibration and s...
09/22/1987
4694408Apparatus for testing auto electronics systems
An interactive system and method for testing vehicle electronics systems is disclosed in which various vehicle subsystems are exercised under the control of the tester unit while the performance of associated subsystems are monitored to detect and isolate...
09/15/1987
4691203Downhole telemetry apparatus and method
A system and method is described for amplifying and transmitting an information signal from a downhole drillstring location. The amplifier shifts the relatively low frequency information signal up to a high frequency level, amplifies the high frequency si...
09/01/1987
4686712Goggle mounting system
The goggle mounting system comprises protective goggles which carry one strap on each side for attachment to a helmet. The straps are flexible and resilient. The attachment of the straps to the helmet is such that the strap on only one side is easily disc...
08/18/1987
4687984JFET active load input stage
An active load circuit for operational amplifiers and the like is described which provides an improved common mode rejection ratio and common mode voltage range, and alleviates transistor saturation and cut off problems during maximum slew rates. Drive cu...
08/18/1987
4685663Precision vise with independently moveable jaws
A dual vise is disclosed which has first and second vise assemblies. The vise assemblies have centrally fixed stationary jaws and independently controlled moveable jaws, each vise assembly being capable of holding a work piece under a pressure which is in...
08/11/1987
4683423Leadless chip test socket
A test socket for a leadless chip carrier is disclosed in which a clamp is pivotally mounted to a base member, such that the carrier can be inserted into a recess in the base member and the clamp pivoted closed to lock the carrier in place. The clamp incl...
07/28/1987
4683511Head and guide cleaning device for video tape recorder
A blocking member in the form of a short member attached to the front face of a cassette housing in front of the guide of the tension sensor of the video tape recorder blocks the movement of that guide to prevent the cleaning tape from being under too muc...
07/28/1987
4681472Self-loading binder
A system is disclosed for locating a label on the spine of a bound work. An elongate leader extends through a slot formed when an overlay cover is placed on and sealed to the spine of the bound work, and out each end of the slot. The leader includes an ad...
07/21/1987
4679335Vented bicycle shoe
A bicycle shoe is disclosed in which a plurality of spaced air scoops are located at the front of the shoe and aligned with channels formed in the inner base of the shoe and extending toward the heel. As the wearer moves rapidly forward on a bicycle, air ...
07/14/1987
4677369CMOS temperature insensitive voltage reference
A temperature insensitive voltage reference is described which can advantageously be implemented using standard CMOS processing techniques. A pair of parasitic bipolar transistors are coupled with appropriate resistors to produce a voltage with a temperat...
06/30/1987
4676319Fire fighting tool and method
A fire fighting tool is described which is capable of both penetrating the wall of an enclosure, and dispensing a fire fighting agent into the interior of the enclosure. A drill bit or other penetrating device is carried at the forward end of an elongate ...
06/30/1987
4675561FET output drive circuit with parasitic transistor inhibition
A CMOS output drive circuit has two field effect transistors (FETs) implemented with a CMOS process and characterized by parasitic bipolar transistors. The back-gates of the two transistors are tied together, such as by forming the devices in a common wel...
06/23/1987
4673925Boiling alarm
A boiling sensor includes a case, which is mounted on the upper edge of a container in which liquid is to boil. A pair of electrical probes are spaced apart a small distance and mounted on the case above the liquid. Behind the probes is a collector of the...
06/16/1987
4669733Playing card holder with tufted flock liner
A playing card holder is described in which two plates with diverging inner surfaces form a tapered slot which extends upward from a base section. The inner surface of each plate is lined with a layer of tufted flock material, which may be partially set i...
06/02/1987
4669300Electromagnetic stylus force adjustment mechanism
Adjustment of the force that a stylus exerts on an object in a stylus profiler is accomplished by having a magnetic core, which is operably connected to the stylus and and mounted within an electromagnetic coil. The core moves relative to the coil as the ...
06/02/1987
4668633Growth container and method for pathogenic and other laboratory organisms
A growth container for laboratory organisms such as fungi, TB bacilli, yeast, virus or bacteria in which a well for the growth medium is spaced inwardly from an outer and higher wall. A lid snaps in place over the dish to substantially enclose the growth ...
05/26/1987
4659143Food catcher for attaching to table
To catch food and other debris from a child sitting in a seat where the seat is the type that attaches to the edge of the table, the present invention has a pair of arms moveable with respect to each other. The arms are attached to the table to the sides ...
04/21/1987
4656413Stabilized control system and method for coupling an induction generator to AC power mains
A stabilized control system and method for smoothly connecting and disconnecting an induction generator to the utility power grid is described. Thyristor switches are interposed between each phase of the mains and the generator. The thyristors are gated s...
04/07/1987
4650460Pneumatic module for intraocular microsurgery
An electro-pneumatic module is provided that permits the gradual control of the level of air pressure pulses injected into pneumatic vitrectomy probes used in intraocular microsurgical procedures. This invention permits the interchangeable use of the diff...
03/17/1987
4640027Motorcycle boot with positive air circulation
A motorcycle boot is described with a positive air circulating system which distributes air over the wearer's foot in a continuously replenished flow. Air enters the boot through air scoops on the upper sides, travels down an intake duct at the rear, is d...
02/03/1987
4638736Bomblet dispersion system for a cluster bomb
Each bomblet within a cluster bomb is provided with an individually programmable detonation time delay, such that the bomblets can be programmed to detonate at desired intervals over a relatively long period of time. Program signals are transmitted to a n...
01/27/1987
4633165Temperature compensated voltage reference
A temperature compensated voltage reference circuit in which a compensation current is generated by establishing a current through a passive impedance element which varies with temperature in accordance with the transistor voltage equation. This current i...
12/30/1986
4632019Airplane airconditioner
The aircraft pre-ventilation system has a ventilation unit mounted for movement along the ground. A primary and a return duct carry air between the ventilator and the aircraft door opening. The ducts are connected to a fitting which is designed to fit int...
12/30/1986
4630824Playing card holder
A playing card holder is described in which two plates with diverging inner surfaces extend upward from a base section. The two plates diverge from each other within an angular range of about 1°-8°, and preferably about 3°-5°, to form a tapered slot w...
12/23/1986
4629441Fabric doll face with stuffed feature, and method
The doll of the present invention is formed by outlining a desired feature with an adhesive such as a meltable, fuser thread between a front and rear piece of fabric in an outline of the desired feature such as the nose or mouth. After the adhesive is mad...
12/16/1986
4625746Automatic fluid sealing mechanism for a conduit with a frangible connector
A sealing mechanism for a pair of conduits held together by means of a frangible connector is described. Each conduit has a center pivoted butterfly valve with valve discs which are spring biased to a closed position. The valve discs are mutually abutting...
12/02/1986
4625966Playing card holder with curvature
A playing card holder is described in which two plates with diverging inner surfaces extend upward from a base section. The two plates diverge from each other within an angular range of about 1°-8°, and preferably about 3°-5°, to form a tapered slot w...
12/02/1986
4614986Magnetic servo with improved tracking system
A two-part head positioning system has a tracking motor for moving the head through relatively small distances so that it follows the track of a medium and moves between adjacent tracks and a seek motor for moving the tracking motor and head through relat...
09/30/1986
4603440Sport jersey
A jersey for motorcycle racing or other strenuous activity, with perspiration absorbent and cooling cuffs attached to the ends of the sleeves. The cuffs, which are formed from a resilient material, extend over the wearer's wrist to absorb perspiration run...
08/05/1986
4599715Method and apparatus for sound track reproduction
A method and apparatus is disclosed for the reproduction of a sound signal recorded on a variable density optical sound track negative, in which the amount of light transmitted through the sound track is related to its exposure by a predetermined relation...
07/08/1986
4596008Optical sound track playback apparatus and method
The locally averaged or approximate D.C. value of a variable area optical sound track on a film is first determined, and this information is then used to control the width of a scanning slit at a playback station. The scanning slit width is reduced for sm...
06/17/1986
4592660Watch protector
A watch protector has a guard member extending across the face of the watch and two ring members, each attached at an end of the guard member. Each ring member has a cross-piece extending between opposite sides of the ring member for dividing the ring mem...
06/03/1986
4587749Vented motorcycle boot
A vented motorcycle boot in which air scoops are provided at the upper side and the front of the boot, with air ducts running down along the sides of the boot from the scoops to the ankle area. A cooling flow of air is established through the scoops and d...
05/13/1986
4586493Therapy table
The therapy table has a supporting surface for supporting a patient. A carriage below the supporting surface carries a roller mechanism that acts on the body. A motor translates the carriage relative to the supporting sruface, and the patient. A counterba...
05/06/1986
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