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Title: Stencil Screens
Creator: Kinney, Layton C., Tompkins, Edwin H.
Date: 2009-05-04, 1976-01-27
Description: A blank for forming a stencil screen for silk screen or electrostatic stencil printing is disclosed. The screen includes a resilient, high...
Show moreA blank for forming a stencil screen for silk screen or electrostatic stencil printing is disclosed. The screen includes a resilient, high tensile strength, porous substrate such as a monofilamentary nylon or stainless steel 200-mesh screen. A light radiation absorbent, self-combustible, ink-resistant, ink-impervious and tough film is applied to the screen, suitably a combustible black nitrocellulose film or a black cellulose ether film containing finely dispersed nitrate or perchlorate. The film is selectively removed by directly pulsing high-intensity light of over 10 joules per square inch for a short duration of 1 to 50 milliseconds in the form of an image pattern to ignite and completely combust the film only in said areas during the duration of the pulse.
Sponsorship: IIT Research Institute
United States Patent
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Title: Magnetic Recorder with Pressure Shoe for Record Members
Creator: Camras, Marvin
Date: 1952-07-15
Description: Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent
United States Patent

Title: Magnetic Transducer System and Method
Creator: Camras, Marvin
Date: 2010-01-26, 1972-08-22
Description: A magnetic transducer head having a coupling gap of controllable effective longitudinal dimension. In one embodiment a gap spacer of magnetic...
Show moreA magnetic transducer head having a coupling gap of controllable effective longitudinal dimension. In one embodiment a gap spacer of magnetic material is energized by bias current and/or signal current during recording while being deenergized during playback to provide a larger coupling gap for recording than for playback. Recording gap size may be controlled dynamically, or a very high frequency bias current such as 100 mhz may be supplied to the magnetic gap spacer. A magnetic head may have a zero gap dimension when the magnetic gap spacer is deenergized to prevent any substantial residual external field. An electro-magnetic transducer head with the electric circuit portion including a path through the electrically conductive magnetic corepiece at the transducer gap, thus concentrating the gap field and mininizing core losses at very high bias or signal frequencies.
Sponsorship: IIT Research Institute
United States Patent
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Title: Continuous Antisolvent Crystallization Process and System Using Plug Flow Reactors
Creator: Myerson, Allan S., Alvarez, Alejandro
Date: 2012-07-12, 2012-07-10
Description: A process and system for continuous crystallization of a compound using antisolvent addition in which a solution is prepared with an organic...
Show moreA process and system for continuous crystallization of a compound using antisolvent addition in which a solution is prepared with an organic compound and a solvent. An antisolvent is added to the solution in a continuous plug flow system comprising at least one process module. The antisolvent can be added in multiple addition points such that the overall amount of antisolvent added to the continuous plug flow reactor remains fixed. The multiple addition point technique provides every process module with an equal volume of antisolvent. Finally, crystals are recovered from the slurry upon exiting the system. Preferably, the mean crystal size is less than 100 μm.
Sponsorship: Illinois Institute of Technology
United States Patent
Primary US Patent Classification 117/68
US Patent Classification 117/69
US Patent Classification 117/70
International Patent Classification C30B29/54
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Title: Nickel Base Alloys and Process for their Manufacture
Creator: Holtz, Frederick C
Date: 4/24/2009, 1970-03-24
Description: Sponsorship: IIT Research Institute
United States Patent

Title: Electro-Osmotic Production of Hydrocarbons Utilizing Conduction Heating of Hydrocarbonaceous Formations
Creator: Bridges, Jack E., Taflove, Allen, Sresty, Guggilam C.
Date: 2009-05-08, 1987-02-24
Description: An electro-osmotic method for the production of hydrocarbons utilizes in situ heating of earth formations having substantial electrical...
Show moreAn electro-osmotic method for the production of hydrocarbons utilizes in situ heating of earth formations having substantial electrical conductivity. A particular volume of an earth formation is bounded with a waveguide structure formed of respective rows of discrete elongated electrodes in a dense array wherein the active electrode area and the row separation are chosen in reference to the deposit thickness to avoid heating barren layers. Electrical power is applied at no more than a relatively low frequency between respective rows of electrodes to deliver power to the formation while producing relatively uniform heating thereof and limiting the relative loss of heat to adjacent regions to less than a predetermined amount. At the same time the temperature of the electrodes is controlled near the vaporization point of water to maintain an electrically conductive path between the electrodes and the formation. A heat sink is provided by supplying aqueous liquid electrolyte to space between the electrodes and the adjacent formation, thereby maintaining the temperature thereat no greater than about the boiling point of water and maintaining a conductive path between said formation. A d.c. polarized potential is applied to enhance flow of reservoir fluid into a preselected row of electrodes, and collected reservoir fluids are removed from the electrodes in the preselected row.
Sponsorship: IIT Research Institute
United States Patent
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Title: Magnetic Transducer Head with Auxiliary Means for Diverting Residual Flux
Creator: Camras, Marvin
Date: 2009-04-27, 1971-07-06
Description: A magnetic head is shown having auxiliary core material in a substantially unstressed condition with very low direct current coercivity and...
Show moreA magnetic head is shown having auxiliary core material in a substantially unstressed condition with very low direct current coercivity and located within the working magnetic core for diverting magnetic flux due to residual magnetization of the main core of the head away from the record medium path. Crossfield magnetic heads, offset pole magnetic heads, and composite core magnetic heads with windings for different frequency ranges are also disclosed.
Sponsorship: IIT Research Institute
United States Patent
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Title: Automatic Stop for Magnetic Recorders
Creator: Camras, Marvin
Date: 1951-10-30
Description: Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent

Title: Transducer Machine and Spool Construction Therefor
Creator: Camras, Marvin
Date: 4/23/2009, 1965-07-27
Description: Sponsorship: IIT Research Institute
United States Patent

Title: Transducer Machine
Creator: Camras, Marvin, Galus, Stanley A.
Date: 4/23/2009, 1966-06-07
Description: Sponsorship: IIT Research Institute
United States Patent

Title: Magnetic Transducer Head
Creator: Camras, Marvin
Date: 1963-02-26
Description: Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent

Title: Transducer System Adaptable for Audio or Video Recording or Reproduction
Creator: Camras, Marvin
Date: 2009-04-29, 1972-08-22
Description: A magnetic transducer system for selective audio or video operation with movable guides for shifting the tape path between audio, video, and...
Show moreA magnetic transducer system for selective audio or video operation with movable guides for shifting the tape path between audio, video, and rewind positions, or with fixed guides defining both an audio and video tape path, the audio tape path being clear of the video head, for example. A video transducer with a receptacle removably receiving and providing external energization for a battery powered audio transducer unit. An audio/video cartridge transducer arrangement for selective operation with audio and video cartridges of different configuration, preferably using a common capstan element.
Sponsorship: IIT Research Institute
United States Patent
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Title: Hemoglobin Multiple Emulsion
Creator: Beissinger, Richard L., Wasan, Darsh T., Sehgal, Lakshman R., Rosen, Arthur L.
Date: 2009-05-11, 1991-10-29
Description: A multiple emulsion of aqueous oxygen carrying material in oil in outer aqueous phase is suitable for provision of oxygen for oxygen transfer...
Show moreA multiple emulsion of aqueous oxygen carrying material in oil in outer aqueous phase is suitable for provision of oxygen for oxygen transfer processes. A hemoglobin multiple emulsion in physiologically compatible oil in an outer aqueous saline solution is provided in sufficiently small droplet size to provide oxygen flow through blood vessels to desired body tissues or organs thereby providing a blood substitute. A process is provided wherein hemoglobin, a fragile material, is formulated into high hemoglobin content water-in-oil-in-water multiple emulsions while maintaining high yields and high oxygen exchange activity.
Sponsorship: Illinois Institute of Technology
Sponsorship: Northfield Laboratories, Inc.
United States Patent
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Title: Cartridge Transducer Machine and Cartridge Therefor
Creator: Camras, Marvin
Date: 2009-04-27, 1971-11-02
Description: A tape cartridge transducer machine compatible with existing tape cartridges but provided with a cartridge ejection leverage mechanism which...
Show moreA tape cartridge transducer machine compatible with existing tape cartridges but provided with a cartridge ejection leverage mechanism which is actuated manually or by a solenoid to overcome the cartridge-biasing spring and shift the cartridge to an inactive standby position in the cartridge receiving space of the machine, after which the cartridge is manually removable with minimum effort. The machine preferably provides a balanced cartridge-biasing means to safeguard the cartridge against binding.
Sponsorship: IIT Research Institute
United States Patent
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Title: Magnetic Record for Video Signals
Creator: Camras, Marvin
Date: 1964-05-12
Description: Sponsorship: IIT Research Institute
United States Patent

Title: Drive Mechanism for Magnetic Recorders
Creator: Camras, Marvin
Date: 1953-11-17
Description: Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent

Title: Capstan Drive System for Driving Tape Record Media, and Having Internally Mounted Transducer Head Means
Creator: Camras, Marvin
Date: 2009-05-08, 1981-05-05
Description: Sponsorship: IIT Research Institute
United States Patent

Title: Magnetic Reproduction System
Creator: Wiegand, David E.
Date: 1958-03-25
Description: Sponsorship: Armour Research Foundation of Illinois Institute of Technology
United States Patent

Title: Method for In Situ Heat Processing of Hydrocarbonaceous Formations
Creator: Bridges, Jack, Taflove, Allen, Snow, Richard
Date: 2009-05-08, 1979-02-20
Description: The disclosure describes a technique for uniform heating of relatively large blocks of hydrocarbonaceous formations in situ using radio...
Show moreThe disclosure describes a technique for uniform heating of relatively large blocks of hydrocarbonaceous formations in situ using radio frequency (RF) electrical energy that is substantially confined to the volume to be heated and effects dielectric heating of the formations. An important aspect of the disclosure relates to the fact that certain hydrocarbonaceous earth formations, for example raw unheated oil shale, exhibit dielectric absorption characteristics in the radio frequency range. In accordance with the system of the invention, a plurality of conductors are inserted in the formations and bound a particular volume of the formations. The phrase "bounding a particular volume" is intended to mean that the volume is enclosed on at least two sides thereof. Electrical excitation is provided for establishing alternating electric fields in the volume. The frequency of the excitation is selected as a function of the dimensions of the volume so as to establish a substantially non-radiating electric field which is substantially confined in the volume. In this manner, volumetric dielectric heating of the formations will occur to effect approximately uniform controlled heating of the volume.
Sponsorship: IIT Research Institute
United States Patent
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Title: Video Display System
Creator: Camras, Marvin
Date: 4/23/2009, 1969-02-25
Description: Sponsorship: IIT Research Institute
United States Patent

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