Patents Assigned to Chemetron Corporation
  • Patent number: 4126777
    Abstract: A control circuit is provided for a microwave oven in which a crystal rectifier is responsive to variations in the level of the electromagnetic field within the oven cavity when items of different energy absorption or reflection characteristics are placed in the oven. The electric current developed by the crystal is employed to generate a ramp type electrical signal which is compared with a fixed reference voltage to control the termination of microwave power to the oven. Compensation for the nonlinear relationship between crystal current and the level of the electromagnetic field within the oven is provided. In addition, compensation for the initial temperature of the food item which is placed in the oven is provided.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: November 21, 1978
    Assignee: Chemetron Corporation
    Inventor: Donald G. Moore
  • Patent number: 4126177
    Abstract: A heat exchanger for rapidly heating or cooling materials such as fluids containing fragile, discrete particles of varying sizes without substantial damage to the particles. The exchanger has inner and outer heat transfer surfaces that define an elongated annulus. Located in the annulus is a pair of opposed, spiral, inner and outer ribs which do not span the annulus and which, upon rotation, move the material toward the exchanger inlet against the flow therefrom which overflows the ribs and moves from rib to rib and to the outlet. Scraper blades associated with the ribs, scrape the exchanger inner and outer surfaces.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: November 21, 1978
    Assignee: Chemetron Corporation
    Inventors: Robert L. Smith, Carl C. Yann
  • Patent number: 4122343
    Abstract: In a method generating correlative data from various products of thermal degradation of biological specimens and comprising sequential steps for each specimen of degrading such specimen by heating such specimen so as to cause various products of thermal degradation of such specimen to be evolved, ionizing the products of thermal degradation of such specimen by a technique causing negligible fragmentation, detecting ion currents for such specimen, and recording such detected ion currents, an improvement is attained wherein each specimen is heated in an identical non-isothermal time-dependent heating sequence, wherein a three-dimensional array comprising a large and sufficient number of ion currents, which correspond to substantially all detectible ratios of mass-to-charge within a range at a large and sufficient number of successive instants during the respective heating sequences, are detected and recorded for each specimen, and representative data from the three-dimensional array thus recorded for each one o
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: October 24, 1978
    Assignee: Chemetron Corporation
    Inventors: Terence H. Risby, Alfred L. Yergey, III
  • Patent number: 4117304
    Abstract: A control station for use with multiple operator power supplies in a semiautomatic welding system is disclosed. The system utilizes a constant-potential multiple operator unit, suitable for gas-metal arc spray transfer welding, to which control stations may be connected to provide satisfactory short-circuiting arc operation for selected operators. The control station comprises a plurality of resistors selectably connectable in specified parallel relationships through switching means and an iron core inductor to provide the required operating characteristics for short-circuit welding.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: September 26, 1978
    Assignee: Chemetron Corporation
    Inventors: Dale M. Wodzinski, Michael Clissa
  • Patent number: 4115679
    Abstract: An electromagnetic oven is provided with a control system comprising a ferrite sensor located within the oven, a magnetic property detector coupled to the sensor, and control means responsive to signals from the detector. The sensor is positioned on a tray together with the items to be heated and this assembly is preferably cooled to a uniform low temperature before the tray is placed in the oven. The sensor is thus subjected to the same thermal environment as the items on the tray so that when the tray is placed in the oven the time required for the sensor to reach its Curie point and shut off the oven is dependent upon the thermal "history" of the items on the tray.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: September 19, 1978
    Assignee: Chemetron Corporation
    Inventor: Donald G. Moore
  • Patent number: 4115680
    Abstract: A control circuit is provided for a microwave oven in which a crystal rectifier is responsive to variations in the level of the electromagnetic field within the oven cavity when items of different energy absorption or reflection characteristics are placed in the oven. The electric current developed by the crystal is employed to generate a ramp type electrical signal which is compared with a fixed reference voltage to control the termination of microwave power to the oven. Compensation for the nonlinear relationship between crystal current and the level of the electromagnetic field within the oven is provided. In addition, compensation for the initial temperature of the food item which is placed in the oven is provided.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: September 19, 1978
    Assignee: Chemetron Corporation
    Inventor: Donald G. Moore
  • Patent number: 4111671
    Abstract: A method and related apparatus for separating carbon dioxide snow from a mixture of carbon dioxide snow and vapor is disclosed. A mixture of carbon dioxide snow and vapor is introduced into a rectangular conduit which has an inlet end, an outlet end, a discharge orifice and continuously increasing cross-section from said inlet end to said discharge orifice. At least a portion of the conduit between the inlet end and the discharge orifice is curved to define a flow path for the mixture such that carbon dioxide snow tends to be concentrated for flow in a concentrated stream through said path. Means for deflecting a portion of the mixture after it passes through said discharge orifice is also provided.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: September 5, 1978
    Assignee: Chemetron Corporation
    Inventor: Hilding Victor Williamson
  • Patent number: 4109726
    Abstract: A fire extinguishing system that is of the gas dispersion type is provided, whereby a given supply cylinder, controlled by a cylinder valve, is piped to a plurality of directional or line valves for delivery to various locations. Sensing devices are also provided for controlling the line valves and cylinder valves as are manual valve operators. A particularly novel cylinder valve is provided, whereby once the valve is opened, venting of one side of the piston prevents closing prior to discharge of fluid from the cylinder.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: August 29, 1978
    Assignee: Chemetron Corporation
    Inventors: Arne Hansen, George Troup
  • Patent number: 4098853
    Abstract: A humidifier system for delivering breathing gases such as air or oxygen from a respirator, anesthesia machine, oxygen source, or the like to a patient under controlled conditions of temperature and humidity is disclosed. The humidifier comprises a support housing adapted to receive a removable water tank, the housing also containing a low water sensing system, a water heating means, and a system for sensing and for regulating the temperature of the water in the tank. The tank includes an air inlet leading to a diffuser chamber, from which air flows through a diffuser plate, through the water to the humidifier, and thence to an outlet for delivery to the patient. The diffuser plate incorporates a plurality of cone-shaped apertures which create air turbulence in the water so that as the breathing gases are forced through the water tank under positive pressure, the gases are uniformly heated and humidified prior to delivery.
    Type: Grant
    Filed: March 30, 1976
    Date of Patent: July 4, 1978
    Assignee: Chemetron Corporation
    Inventors: Allen C. Brown, Neil R. Hattes, Theodore B. Eyrick
  • Patent number: 4096858
    Abstract: A respiration unit for supplying a preselected limited volume of breathing gas to a patient at limited positive pressures, and at a preselected limited flow rate is disclosed. The system includes an air delivery cylinder having a drive weight which is free to move up and down. A diaphragm connected to the weight divides the cylinder into an upper control chamber and a lower delivery chamber. A vacuum source is connected to the control chamber through a first solenoid-controlled valve to regulate the lifting of the weight, and a second solenoid-controlled valve regulates the bleeding of air into the control chamber to release and regulate the rate of fall of the weight, thereby driving breathing gas under pressure out of the lower chamber. A control system regulates the lift and lower cycles of the drive weight to provide the required operation of the system, with various sensors being provided to allow patient control of the system under selected conditions, and to assure patient safety.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: June 27, 1978
    Assignee: Chemetron Corporation
    Inventors: Theodore B. Eyrick, Allen C. Brown, Neil R. Hattes
  • Patent number: 4095963
    Abstract: This invention relates to the stabilization of deodorized edible oils. In the process of the invention, edible oils are steam deodorized in the presence of a peroxide inhibiting amount of molybdenum metal or molybdenum oxide. It has been further found that the stabilizing effect of molybdenum metal or molybdenum oxide is obtained even in the presence of pro-oxidant metals.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: June 20, 1978
    Assignee: Chemetron Corporation
    Inventor: Dewey D. Lineberry
  • Patent number: 4091982
    Abstract: A method of constructing a double-sigmoid connector from a pair of arcuate elbows comprising the steps of: forming an outlet in a portion of the outer periphery of each of the elbows, said outlet having an annular wall extending outwardly of the outer periphery of each elbow, and welding the outlet walls together.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: May 30, 1978
    Assignee: Chemetron Corporation
    Inventor: John Leonard Carberry
  • Patent number: 4092077
    Abstract: Structural connector for tubular members used in trusses and the like comprises a one-piece forged element comprising at least a portion of a tubular primary member with a longitudinal central axis and a pair of first and second tubular secondary members integrally connected to one side of the principal member. The secondary members have longitudinal central axes coplanar with the axis of said portion of said primary member and the axes of the secondary members intersect each other at a point displaced to the same side of the axis of the primary member where the secondary members intersect one another.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: May 30, 1978
    Assignee: Chemetron Corporation
    Inventor: Henry Howard George
  • Patent number: 4077248
    Abstract: A press for straightening a railroad rail formed by the welding of the ends of two rail sections together. The press has a first reciprocatable cage having two opposed rams straddling the rail for straightening the rail in one plane and a second reciprocatable cage having similarly arranged rams extending into the first cage for straightening the rail in a second plane. The cages are connected to suitable power means located remote from the tending side of the press for efficient operation of same.
    Type: Grant
    Filed: January 3, 1977
    Date of Patent: March 7, 1978
    Assignee: Chemetron Corporation
    Inventor: Karl Lewis Lindmark
  • Patent number: 4075475
    Abstract: A method facilitating the rapid and objective classification and/or identification of an unknown biological specimen is disclosed. A physical sample of the specimen is controllably heated in accordance with a predetermined nonisothermal time dependent function causing the sample to undergo controlled thermal degradation and give off a characteristic time dependent sequence or evolution pattern of gaseous degradation components (molecular fragments). This sequence of gaseous degradation components is then directly passed into an ionization source and ionized to provide a respectively corresponding time dependent sequence of characteristic ions. These ions are then analyzed in a mass spectrometer and measured data is recorded representing the respective quantities of ions having particular masses being produced as a function of time or temperature.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: February 21, 1978
    Assignee: Chemetron Corporation
    Inventors: Terence H. Risby, Alfred L. Yergey, III
  • Patent number: 4073464
    Abstract: A fire extinguishing system that is of the gas dispersion type is provided, whereby a given supply cylinder, controlled by a cylinder valve, is piped to a plurality of directional or line valves for delivery to various locations. Sensing devices are also provided for controlling the line valves and cylinder valves as are manual valve operators. A particularly novel cylinder valve is provided, whereby once the valve is opened, venting of one side of the piston prevents closing prior to discharge of fluid from the cylinder.
    Type: Grant
    Filed: August 24, 1976
    Date of Patent: February 14, 1978
    Assignee: Chemetron Corporation
    Inventors: Arne Hansen, George Troup
  • Patent number: 4070126
    Abstract: In a connector, as used to interconnect structural members in a trusswork, an elbow and a pipe, which may be another elbow, are provided with suitable slots receiving a plate, and the elbow, pipe, and plate are welded together.
    Type: Grant
    Filed: September 15, 1976
    Date of Patent: January 24, 1978
    Assignee: Chemetron Corporation
    Inventor: Henry Howard George
  • Patent number: D250047
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: October 24, 1978
    Assignee: Chemetron Corporation
    Inventors: George Tom Lewis, John Hamilton Price
  • Patent number: D250131
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: October 31, 1978
    Assignee: Chemetron Corporation
    Inventors: George T. Lewis, John H. Price
  • Patent number: RE29837
    Abstract: An electromagnetic oven is provided with a control system comprising a sensor located within the oven, a detector coupled to the sensor, and control means responsive to signals from the detector. In one embodiment, the control means activate a counter which, upon a predetermined number of operations, signals a condition of the load within the oven and may modify subsequent energy inputs to the load.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: November 14, 1978
    Assignee: Chemetron Corporation
    Inventor: Donald G. Moore