Research Corporation maser and laser patents collection,
1956-1962
Repository
American Institute of Physics. Niels Bohr Library & Archives.
Papers created by
Research Corporation.
Size of collection
0.25 linear feet
1 half manuscript box
Short description of collection
Collection of patents that reflect the history of maser and laser development in the 1950s and 1960s.
Language(s) of collection
English
Collection number:
AR156
The Research Corporation was incorporated in New York in 1912 with the purpose of advancing academic science and technology. It supports research in the natural and physical sciences and evaluates, patents, and licenses academic inventions.
Patents assembled from the files of the Research Corporation which reflect the history of maser and laser development during this period. The collection includes patents by Robert H. Dicke, Lowell E. Norton, Friedrich H. Reder, Charles H. Townes, and others.
Researchers must have an approved access application on file in order to access archival materials. https://www.aip.org/history-programs/niels-bohr-library/item-request.
These papers have been indexed in the
International Catalog of Sources for History of Physics and Allied Sciences (ICOS)
using the following terms. Those seeking related materials should search under these terms.
Persons
Dicke, Robert H. (Robert Henry)
Norton, Lowell E.
Reder, Friederich H.
Townes, Charles H.
Institutions
Research Corporation.
Subject terms
Lasers.
Masers.
Genre terms
Patents (licenses).
This collection is organized into a single series:
Box [number], Folder [number], Research Corporation maser and laser patents collection, 1956-1962. American Institute of Physics, Niels Bohr Library & Archives, College Park, MD 20740, USA.
Title
Finding Aid to the Research Corporation maser and laser patents collection, 1956-1962
Publisher
American Institute of Physics Niels Bohr Library & Archives
One Physics Ellipse
College Park, MD 20740
USA
nbl@aip.org
2014
Encoding Information
Machine-readable finding aid encoded by Melanie J. Mueller in 2014. Any revisions made to this finding aid occurred as part of the editing and encoding process.
| Box 1 |
Folder 1 |
Oscillators Employing Microwave Resonant Substance: Relates to generation of phase coherent electrical oscillations; means of utilizing resonance properties of particles not in thermal equilibrium; gaseous medium, microwave frequency output; excitation by pulse excitation., undated |
|
Folder 2 |
Amplifier Employing Microwave Resonant Substance: Microwave amplifier utilizing a microwave resonant substance as the amplifier element; very similar to number 1; infers gaseous medium but broader in first three claims., undated |
|
Folder 3 |
Microwave Amplifier Employing a Microwave Resonant Gas as the Amplifying Element: A narrower description of number 2 stating structure of device and use of low pressure gas., undated |
|
Folder 4 |
Apparatus Utilizing Atomic or Molecular Beams: Device to produce a control signal utilizing effects of magnetic fields upon the spin orientation or angular momentum of atomic, molecular or nuclear particles in a particle beam., undated |
|
Folder 5 |
Atomic or Molecular Oscillator Circuit: A maser device in which oscillations are sustained by electrical feedback, a two chamber device providing modulation to resonant frequency., undated |
|
Folder 6 |
Molecular Microwave Translating Apparatus: Relates to molecular translating devices to secure and continuously maintain a microwave resonant gas in a state of non-equilibrium by the application of heat., undated |
|
Folder 7 |
Tunable Atomic Amplifier or Oscillator: Design similar to number 5 wherein the apparatus is tuned by varying the static and microwave magnetic fields., undated |
|
Folder 8 |
Molecular Amplification and Generation Systems and Methods: Improvement patent describing apparatus to increase the quantity of gas molecules in the higher of two energy states. Claims on specific design., undated |
|
Folder 9 |
Amplifiers and/or Generators Employing Molecularly Resonant Media: A maser device which circulates the resonant gas to permit continuous operation at ambient temperatures., undated |
|
Folder 10 |
Uninterrupted Amplification by Stimulated Emission of Radiation From a Substance Having Three-Energy States: A solid resonating medium with a multiple energy level system, not limited to frequency band; claims oscillator, amplifier and receiver., undated |
|
Folder 11 |
Three Level Maser: A maser using a composite crystal doped with a paramagnetic salt (various sulphates, claim 2), a magnetic field and means for pumping., undated |
|
Folder 12 |
Solid State Maser: A maser using a paramagnetic solid with three energy levels; limited to microwave frequencies., undated |
|
Folder 13 |
Maser: A solid state maser using an endless paramagnetic film continuously excited by magnetic fields to a higher energy level and then fed to the resonant cavity., undated |
|
Folder 14 |
Nuclear Quadrupole Resonance Devices: A particular electrical arrangement wherein the cavity structure is tuned to the three energy transition frequencies, that is, pumping frequency and the two radiated level transitions., undated |
|
Folder 15 |
Maser: Similar to number 13 (same inventors)., undated |
|
Folder 16 |
Superregenerative Maser: Relates to the external circuitry, magnetic fields, pulse and sweep generators, and so forth, used with a maser using gases, liquids or solids for super-regenerative action., undated |
|
Folder 17 |
Quantum Mechanical Resonance Devices: Improvement patent on Townes’ original NH3 maser, by providing a long path of travel before relaxation occurs., undated |
|
Folder 18 |
Maser: A solid state maser employing a paramagnetic material having an anisotropic a-value, that is, varying the resonant frequency as a function of the angle that the crystalline axis makes with the magnetic field., undated |
|
Folder 19 |
Frequency Converter: Similar to number 16 in design; a maser design to convert microwave frequencies to radio frequency or intermediate frequencies., undated |
|
Folder 20 |
Microwave Devices Employing Quantum Transition Resonance Phenomenon: A maser device to generate particular modes (TE11, TM01 ) of electromagnetic energy., undated |
|
Folder 21 |
Microwave Maser Amplifier: Improvement patent of microwave amplifier by using isotropic and anisotropic mixture of paramagnetic salts., undated |
|
Folder 22 |
Solid State Maser Amplifier: Similar to number 11 (one inventor common to both), but with four levels or more selected by relaxation times., undated |
|
Folder 23 |
Production of Electromagnetic Energy: Townes patent., undated |
|
Folder 24 |
Automatic Tuning System: Automatic tuning of maser by means of auxiliary circuits which detect a modulation component which produces an error signal when compared to the standard., undated |
|
Folder 25 |
Molecular Resonance Amplifier: A maser cavity tuned to two frequencies to produce a lower beat frequency., undated |
|
Folder 26 |
Focusers for Molecular Resonance Devices: An improvement patent dealing with the focusing of the molecular beam in a gaseous maser., undated |
|
Folder 27 |
Stable Oscillator: An improvement patent relating to number 5 (same inventor) using sustained electromagnetic oscillations to produce subsequent pulses, namely, a self-regenerative stable oscillator., undated |
|
Folder 28 |
Molecular Beam Focusing Devices: Another focusing device by one the inventors of number 26 relating to the focusing of molecular beams by sloping the focuser., undated |
|
Folder 29 |
Atomic Resonance Devices: Relates to an atomic, particularly cesium, beam frequency standard which reduces the wasting of the material, particularly cesium, when the device is not in use, and also improves the means of frequency modulating the output, increases the signal-to-noise ratio and decreases the height of the apparatus., undated |
|
Folder 30 |
Traveling Wave Solid State Masers: Improvement patent relating to a traveling wave, microwave maser which facilitates the simultaneous application of pumping and signal power to a solid state negative resistance material and increases amplification by increasing the transient time., undated |
|
Folder 31 |
Molecular Beam Apparatus of the Maser Type: Mechanical improvement patent relating to means of supplying gaseous material to a maser., undated |
|
Folder 32 |
Masers and Maser Communications Systems: Use of a laser for communications., undated |
|
Folder 33 |
Variable Q Microwave Cavity and Microwave Switching Apparatus for Use Therewith: A variable Q device to be used in a microwave maser to provide stretching and attenuation by means of the avalanche breakdown phenomenon in semiconductors., undated |
|
Folder 34 |
Stabilization of a Maser Cavity: A circuit for controlling the tuning element of a maser frequency oscillator cavity resonator; somewhat similar to number 25 (same inventor)., undated |
|
Folder 35 |
Cesium Ovens: Relates to the molecular beam source only (cesium oven) and the design thereof., undated |
|
Folder 36 |
Maser Type Oscillator: A maser device comprising a body of crystalline material having a plurality of at least four quantum transition energy levels such that energy transitions between said levels are permissible, means for irradiating said body by continuous wave energy of frequency content such as to set up energy transition between the lowest and highest or said levels in a plurality or steps which leave unaffected at least an intermediate one of said levels, and means for selecting the resultant stimulated emission of energy frequency equal to the transition frequency between said highest level and said one intermediate level., undated |
|
Folder 37 |
Molecular Beam Maser: A device to slow down the molecular beams in a gaseous maser to lengthen the transient time., undated |
|
Folder 38 |
Process for Growing and Apparatus for Utilizing Paramagnetic Crystals: A process patent relating to a method for growing single crystal tungstate containing paramagnetic ions., undated |
|
Folder 39 |
Molecular Beam Apparatus: Improvement patent relating to a molecular beam resonant unit which separates molecules or two energy levels into two groups., undated |
|
Folder 40 |
Solid State Maser: (See numbers 11 and 32) A solid state maser capable of continuous operation employing pumping energy at a frequency substantially lower than the signal frequency., undated |
|
Folder 41 |
Thermal Maser: A device using a monocrystalline element with three levels that convert heat energy directly to coherent electromagnetic radiation., undated |
|
Folder 42 |
DC Pumped Solid State Maser: Continually operating maser using Bi, Ar, and Sb as the active element which uses D.C. as the pumping energy source and increases the power handling capacity., undated |
|
Folder 43 |
Tunable Two-Mode Cavity Resonator: A high Q cavity resonator which through its physical configuration can support two fundamental modes., undated |
|
Folder 44 |
Optical Maser: Generation of coherent radiant energy by creation of hole-electron pairs in semiconductive wafers. Pumping is accomplished by radiant means or electric currents., undated |
|
Folder 47 |
Microwave Amplifier, undated |
