Semiconductor saturable absorber mirror
Granted: March 25, 2003
Patent Number:
6538298
A “low field enhancement” (LFR) semiconductor saturable absorber device design in which the structure is changed such that it has a resonant condition. Consequently, the field strength is substantially higher in the spacer layer, resulting in a smaller saturation fluence and in a higher modulation depth. However, the field in the spacer layer is still lower than the free space field or only moderately enhanced compared to the field in the free space. According to one…
High-repetition rate passively mode-locked solid-state laser
Granted: May 21, 2002
Patent Number:
6393035
A passively mode-locked solid-state laser for emitting a continuous-wave train of electromagnetic-radiation pulses, the fundamental repetition rate of the emitted pulses exceeding 1 GHz, without Q-switching has an optical resonator, a solid-state laser gain element placed inside the optical resonator, an exciter for exciting said laser gain element to emit electromagnetic radiation having the effective wavelength, and a saturable absorber for passive mode locking. The laser gain element…
Local area network for simultaneous, bi-directional transmission of video bandwidth signals
Granted: May 29, 2001
Patent Number:
6240554
A local area network for the simultaneous, bi-directional transmission of video bandwidth signals includes an economical switching matrix.
Belt-driven tape cartridge having increased tape capacity
Granted: July 7, 1998
Patent Number:
5777830
A belt-driven tape cartridge having more internal tape storage capacity than prior art cartridges adhering to a standard, but having the same outside dimensions as such a standard cartridge. The invention optimizes internal tape storage capacity in a approximately standard quarter inch cartridge by optimizing the geometric configuration and placement of internal tape guide rollers, repositioning internal side walls, and optimizing the size of the tape drive roller. Compared to the…
Tape cartridge with reduced tangential drive force
Granted: May 26, 1998
Patent Number:
5755392
A belt-driven tape cartridge has tape spools rotatably mounted in the cartridge, and a belt drive assembly for driving the tape back and forth between the spools. The drive assembly includes three roller supporting pins, a driving roller rotatably mounted on one of the pins and a pair of guide rollers rotatably mounted on the other pins, and an endless drive belt extending around the rollers to contact tape on each spool. The cartridge has an opening for entry of a drive roller to engage…
Tape cartridge with increased storage capacity
Granted: March 31, 1998
Patent Number:
5734538
A belt-driven tape cartridge has a rectangular housing with a front wall shorter than its side walls. The front wall has an access opening for a tape read/write head and a drive opening. A pair of tape spools are rotatably mounted in the housing so as to lie on an axis oriented at an angle to the front wall, and a plurality of tape guides define a tape path between the spools and across the access opening. An endless drive belt extends around a drive roller at the drive opening and at…
Tape cartridge with reduced tangential drive force
Granted: December 30, 1997
Patent Number:
5702065
A belt-driven tape cartridge has tape spools rotatably mounted in the cartridge, and a belt drive assembly for driving the tape back and forth between the spools. The drive assembly includes three roller supporting pins, a driving roller rotatably mounted on one of the pins and a pair of guide rollers rotatably mounted on the other pins, and an endless drive belt extending around the rollers to contact tape on each spool. The cartridge has an opening for entry of a drive roller to engage…
Belt-driven tape cartridge with tape vibration damping pin
Granted: December 30, 1997
Patent Number:
5703741
A belt-driven tape cartridge that includes at least one vibration damping pin. The cartridge comprises a base plate, two spools and various tape path members, such as roller guides, tension pins, and the like. The vibration damping pin is mounted on the base plate along an otherwise uninterrupted tape run between two tape path members. A characteristic of the damping pin that distinguishes it from other tape path members is that it does not alter the direction of the tape path…
Tape cartridge with increased storage capacity
Granted: August 6, 1996
Patent Number:
5543992
A belt-driven tape cartridge has a rectangular housing with a front wall shorter than its side walls. The front wall has an access opening for a tape read/write head and a drive opening. A pair of tape spools are rotatably mounted in the housing so as to lie on an axis oriented at an angle to the front wall, and a plurality of tape guides define a tape path between the spools and across the access opening. An endless drive belt extends around a drive roller at the drive opening and at…
Highly durable tape cartridge drive belt
Granted: July 21, 1992
Patent Number:
5131891
A highly durable, usually hydrolytically stable, drive belt for belt-driven tape cartridges is disclosed which is a thin continuous flexible loop of at least one polyetherurethane (preferably non-hygroscopic), which is both durable and strong. Preferably the belt will be composed of a composite of two separate polyetherurethane materials, one having a higher molecular weight and longer polymer chain length than the other. Also preferably, these two polyetherurethane materials will be…
Tape guidance system for belt-driven cartridge
Granted: April 14, 1992
Patent Number:
5104058
The tape guidance system includes at least three tape guidance surfaces, each of the tape guidance surfaces having at least one enlarged shoulder extending from the tape guidance surface toward the tape to bear upon an edge of the tape and provide a confinement force parallel to the plane of the tape in a direction transverse to the direction of the tape motion. Two adjacent tape guide surfaces have a close tolerance guide, with a distance between the shoulders being equal to or slightly…
Spring-loaded tape spool for belt-driven cartridge
Granted: March 3, 1992
Patent Number:
5092537
A tape spool for use in a magnetic tape cartridge which includes means for maintaining the spool at a predetermined height relative to the cartridge base in order to stabilize the tape path. The spool is adapted for mounting on and rotation relative to a cylindrical pin extending perpendicularly from a base toward an opposite wall, the base and wall defining opposite substantially parallel sides of an enclosure, the tape spool remaining a constant distance from the base and including: a…
Tape cartridge housing fastener system
Granted: February 5, 1991
Patent Number:
4989806
A fastening system or mechanism for fastening a cover member of a first, resilient material to a base member of a second, relatively rigid material to form a tape cartridge housing comprises a single rigid fastener connected between the base and cover members and at least one expansion or slip fastener rigidly connected to one of the members and loosely connected to the other member in a manner permitting a predetermined degree of relative sliding movement between the members in any…
Modular internal combustion engine
Granted: October 6, 1987
Patent Number:
4697552
A modular internal combustion engine is disclosed, having a cross-shaped ck-case, composed of a top cover with hatch and a bottom cover, in which there are formed two mutually perpendicular longitudinal and transverse cylindrical holes. In the longitudinal cylindrical hole there are fastened a top and a bottom shell, respectively, while in both ends, coaxially to the top and the bottom covers, there are fastened cylinders with water jackets and heads. In the longitudinal cavity, formed…
Device for fuel delivery to internal combustion engine with vaporization of injected fuel
Granted: March 27, 1984
Patent Number:
4438750
Disclosed is a device for fuel delivery to an internal combustion engine, mprising a vaporizing element whose one section is heated by exhaust gases and the other section is disposed in an intake duct and has an operating surface, a fuel charge being injected onto said surface by an injection nozzle. In this device the operating surface of the vaporizing element extends from its section heated by the exhaust gases to a diametrically opposite portion of the intake duct, and the orifice of…
Electro-chemical cells or batteries
Granted: May 20, 1980
Patent Number:
4204032
A zinc halogen cell having a zinc containing anode and a halogen consuming cathode, comprising a casing capable of withstanding above atmospheric pressure within which the cathode and anode are disposed and containing a zinc halide solution electrolyte incorporating means for storing the halogen liberated at the cathode on recharge and for supplying the halogen to the cathode on discharge.
Valve for piston compressors and pumps
Granted: January 22, 1980
Patent Number:
4184818
The present invention relates to piston compressors and pumps and more particularly it relates to the valves used in these compressors. The valve according to the invention comprises a seat with gas passages and a plate with a Tee profile in cross section. The vertical element of said profile is located at the side of the seat while the horizontal element has closing portions at the ends, said portions contacting the seat on closing of the valve. This improves the operational reliability…
Manufacture of electrodes for electrochemical cells
Granted: September 4, 1979
Patent Number:
4166870
A process of manufacturing an electrode for a zinc halogen electric cell comprising forming a first mix of 20-100 grams of 50% compressed acetylene black, 450-750 ml. water, about 5 ml. acetone, and if desired 5 ml. of 30% zinc chloride solution by mixing gently, forming a second mix of 50 ml. latex and 50-250 ml. water, adding the second mix slowly to the first mix until the resultant mix is in crumbly form, applying a layer of this crumbly mix to a sheet of expanded anodizable metal or…
Electrode structures and electrodes therefrom for use in electrolytic cells or batteries
Granted: January 16, 1979
Patent Number:
4135039
A rechargeable zinc halogen cell is disclosed, together with a carbon electrode structure, an electrode including at least two of the electrode structures, and a metal electrode, all of which may be used with the zinc halogen cell.The electrode structure has a substrate of anodizable metal of Groups IV(A) and V(A) of the Periodic Table, and this substrate has a permanent coating of porous carbon. At least two of these structures are used to make up a halogen storage electrode.The metal…
Electro-chemical cells
Granted: December 12, 1978
Patent Number:
4129689
A zinc chloride rechargeable cell or battery comprising a container, at least one cathode element therein comprising a substrate of a metal or mixture of metals selected from Groups IVA and VA of the Periodic Table according to Mendeleef having applied thereto with sufficient pressure to break the metal oxide film thereon and a layer of porous carbon in which chlorine gas is occluded to form a cathode element and which acts as a current collector at least one zinc bearing electrode…
