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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 4525843 | Ring laser with wavefront conjugating beams An improvement for a ring laser gyro employs insertion of a wavefront conjugating coupling element inside a laser cavity to reduce the lock-in threshold and to reduce the imbalance between the amplitudes of the opposite direction traveling waves (ODTW) in... | 06/25/1985 |
| 4512021 | Passively Q-switched square bore waveguide laser A waveguide laser having a square bore and an external modulator has its power doubled by proper relationship of a coupled cavity external to a cavity in the waveguide medium.... | 04/16/1985 |
| 4494236 | Pulsed rf pumped waveguide laser A waveguide gas laser is disclosed excited with bursts of a transverse rf electric field at a frequency ranging from about 30 MHz to about 3 GHz. The bursts have a duration ranging from about 0.1 μsec. to about 10 μsec. and a repetition rate ranging fro... | 01/15/1985 |
| 4493087 | RF Excited waveguide gas laser A waveguide gas laser of improved stability and efficiency resulting from novel improvements. Such improvements, including longitudinal RF excitation, unique ballasting techniques, a novel drive circuit design that is immediately responsive to defeat unst... | 01/08/1985 |
| 4484333 | Coupled waveguide freespace laser An RF discharge waveguide laser is modulated by an electro-optic modulator positioned in a second optical cavity coupled to a gain cavity containing the waveguide.... | 11/20/1984 |
| 4481633 | Wet-jacket argon-ion laser A segmented ceramic tube for an argon-ion laser is fluid cooled and constructed to avoid shunting of current through the coolant.... | 11/06/1984 |
| 4481634 | RF Excited metal waveguide laser An RF excited metal waveguide laser wherein one of the two opposed electrodes forming the discharge region has its top surface thereof formed as a waveguide thus eliminating the dielectric sidewalls used in prior art metal waveguide lasers. In the preferr... | 11/06/1984 |
| 4477907 | Low power argon-ion gas laser An argon-ion laser achieves low output power by using a plasma guide and mirror configuration which restricts lasing action to a portion of the resonator cavity at relatively high conversion efficiency.... | 10/16/1984 |
| 4477087 | Seal formed out of a hard metal with a plating of soft metals A sealing system including an elongated cylindrical member which has a first open end and a flat circular peripheral edge adjacent to the first open end and a circular member having has a flat surface which is disposed adjacent, but not contiguous, to the... | 10/16/1984 |
| 4475202 | Gas laser In a gas laser composed of a capillary tube made of electrically nonconductive material and presenting a capillary passage, a reservoir tank whose interior is in communication with the passage, the tank including a cylindrical portion coaxially surroundin... | 10/02/1984 |
| 4472808 | Waveguide type gas laser apparatus A digital signal having three logic levels is repeatedly applied to opposite facing electrodes of a waveguide type gas laser apparatus in order to excite laser gas positioned between said electrodes. The three logic level pulse form includes pulses having... | 09/18/1984 |
| 4464758 | Passively-Q-switched dual laser A passively Q-switched laser system uses a common Q-switch cell to control two lasers. The first laser to turn on Q-switches the other laser.... | 08/07/1984 |
| 4446558 | CO2 Laser wave guide A CO2 laser wave guide, which is excitable by a high frequency signal, as two boron nitride bodies (11a, 11b; 111a, 111b) which are held in position in a housing (10) by a specially shaped spring (14, 114) which presses the boron nitride bodies ... | 05/01/1984 |
| 4443877 | Uniformly excited RF waveguide laser An RF excited gas laser having an optical cavity that is also a resonant cavity in the RF region is improved by the spacing of discrete inductors at fixed points along the cavity so that the problem present in the prior art of nonuniform excitation of the... | 04/17/1984 |
| 4439860 | Optical pumping in a whispering mode optical waveguide A device and method for optical pumping in a whispering mode optical waveguide. Both a helical ribbon and cylinder are disclosed which incorporate an additional curvature for confining the beam to increase intensity. An optical pumping medium is disposed ... | 03/27/1984 |
| 4438514 | Sure-start waveguide laser An RF-discharge waveguide laser having two parallel waveguides is improved by the addition of coupling channels which permit the plasma in said waveguides to communicate.... | 03/20/1984 |
| 4429398 | Twin waveguide laser An RF-discharge waveguide laser incorporates two or more waveguides sharing a common set of discharge electrodes. The device may be used to provide two lasers operating on the same or different frequencies, or a single laser with two waveguides contributi... | 01/31/1984 |
| 4416013 | Distributed feedback laser employing the stark effect An apparatus and method for producing distributed feedback in a laser. Electrodes, formed on opposite sides of a waveguide cavity, form a spatially periodic electric field in an amplification medium which exhibits the Stark effect. The field induces a mod... | 11/15/1983 |
| 4414488 | Apparatus for producing a discharge in a supersonic gas flow Disclosure is directed to an apparatus for producing a microwave discharge n a supersonic gas flow such that the available microwave energy is deposited in the gas as completely and uniformly as possible through a substantial cross-section of the flow chan... | 11/08/1983 |
| 4393506 | Sealed-off RF excited CO2 lasers and method of manufacturing such lasers A method is disclosed for manufacturing a sealed-off RF excited CO2 laser with a longer operating life. The invention, which relates to the method and the resulting laser, comprises means for stabilizing the laser gas chemistry otherwise affect... | 07/12/1983 |
| 4381564 | Waveguide laser having a capacitively coupled discharge A waveguide laser having a gain medium excited by a capacitively coupled self-sustained discharge is disclosed. The gain medium is disposed within a dielectric waveguide having a capillary bore centrally located therein. A gain medium such as a rare gas h... | 04/26/1983 |
| 4373202 | RF Excited waveguide gas laser A waveguide gas laser of improved stability and efficiency resulting from novel improvements. Such improvements, including longitudinal RF excitation, unique ballasting techniques, a novel drive circuit design that is immediately responsive to defeat unst... | 02/08/1983 |
| 4367554 | High pressure, high power, compact laser A high pressure, high power, compact laser fabricated from a block of material which is highly transparent at the wavelength of operation. The transmitting block contains a multiplicity of channels along the longitudinal axes thereof, each channel being o... | 01/04/1983 |
| 4169251 | Waveguide gas laser with high frequency transverse discharge excitation Waveguide lasers are disclosed which are excited by means of a tranverse discharge at rf frequencies generally in the vhf-uhf range, i.e., from about 30 MHz to about 3 GHz. These excitation frequencies are sufficiently high to ensure negligible interactio... | 09/25/1979 |
| 4129836 | Frequency stable boron nitride channel laser A CW waveguide channel gas laser constructed from boron nitride which due its high thermal conductivity and extremely low thermal expansivity provides increased frequency stability.... | 12/12/1978 |
| 4121178 | Laser capable of producing a frequency standard A laser for producing a stable frequency standard which finds applicability within a clock. The laser contains a pair of active materials having close but non-overlapping gain profiles so that the laser can oscillate at frequencies particular to each acti... | 10/17/1978 |
| 4103255 | High power, compact waveguide gas laser A high power, compact waveguide gas laser having a housing located within a resonant cavity. The housing has a longitudinal chamber situated therein, the chamber being divided into a plurality of waveguides by a plurality of infrared transmitting partitio... | 07/25/1978 |
| 4054846 | Transverse-excitation laser with preionization Preionization is achieved in transverse-discharge gaseous lasers by means of the Malter effect. In two embodiments, the preionization is achieved either with a metal electrode which is the cathode during preionization and then is the anode during the subs... | 10/18/1977 |
| 4050033 | Submillimeter wave and far infrared molecular lasers and polyatomic buffer gases therefor The optically pumped submillimeter wave lasers employing molecular gases having dipole moments are improved by employing as a polyatomic buffer gas a molecular gas or vapor of a hydrocarbon having a significantly large vibrational heat capacity in relatio... | 09/20/1977 |
| 4044315 | Means for producing and amplifying optical energy 1. In a laser, a solid luminescent sensitive element of Fabrey-Perot optical regenerative configuration and consisting essentially of a clear glass activated with trivalent ytterbium ions.... | 08/23/1977 |
| 4035081 | Laser gyroscope In a laser gyroscope it is desirable for precision operation to eliminate or effectively compensate temperature variations, as well as manufacturing tolerances. To this end the present laser gyroscope has two ring lasers physically arranged so close to ea... | 07/12/1977 |
| 4004249 | Optical waveguide laser pumped by guided electromagnetic wave An electromagnetic waveguide having a large cross section portion tapering to a narrow throat is supplied with microwaves in the large portion to produce a high intensity electric field in the throat. An optical waveguide defined by the throat itself or a... | 01/18/1977 |
| 3970963 | Waveguide laser arrangement for generating and combining a plurality of laser beams Laser arrangements are disclosed wherein a plurality of individual laser beams at slightly different wavelengths are generated in respective capillary bore waveguides in a common body of dielectric material. The generated laser beams are caused to converg... | 07/20/1976 |
| 3961283 | Waveguide gas laser with wavelength selective guide A waveguide gas laser is disclosed wherein narrow resonances in the loss vs. wavelength characteristics of a hollow waveguide laser resonator are employed to achieve wavelength selectivity. The laser includes a capillary bore waveguide of radius a and len... | 06/01/1976 |
| 3939439 | Diffused waveguiding capillary tube with distributed feedback for a gas laser For use in a waveguide gas laser a capillary tube of glass or ceramic has an inner surface defining a longitudinal capillary opening through which the laser gas flows. At least a portion of the inner surface is corrugated with corrugations or channels wit... | 02/17/1976 |
