US2495415A - High-frequency electromagnetic cooking apparatus - Google Patents

High-frequency electromagnetic cooking apparatus Download PDF

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Publication number
US2495415A
US2495415A US622735A US62273545A US2495415A US 2495415 A US2495415 A US 2495415A US 622735 A US622735 A US 622735A US 62273545 A US62273545 A US 62273545A US 2495415 A US2495415 A US 2495415A
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wave guide
energy
container
frequency electromagnetic
present
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US622735A
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Laurence K Marshall
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Raytheon Co
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Raytheon Manufacturing Co
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/64Heating using microwaves
    • H05B6/78Arrangements for continuous movement of material
    • H05B6/782Arrangements for continuous movement of material wherein the material moved is food

Definitions

  • My present invention relates to the art of cool;- ing, and more particularly to the art of cooking by means of electromagnetic energy.
  • my present invention is especially suitable for carrying out the cooking necessary in the canning of foodstuffs, such as fruits, vegetables, etc.
  • One of the objects of my present invention is to provide simple and inexpensive apparatus for performing the above-mentioned cooking by means of electromagnetic energy.
  • Another object of my present invention is to provide apparatus which enables the above-mentioned cooking to be more speedily and more efciently carried out than has heretofore been the case.
  • the container may have a conventional, cylindrical body portion made of metal, the end members thereof may be made of a dielectric material, such as a suitable plastic. Or, if desired, the entire container may be made of such a plastic, the idea being that the container be so constructed as to permit high-frequency energy to pass through the same to cook the foodstui contained therein.
  • a plurality of such containers is successively fed through a Wave guide which is excited from any desired source of high-frequency energy, for example, from a magnetron oscillator. It is preferred that the containers move through the wave guide in the same direction as the direction of propagation of the high-frequency energy.
  • Fig. i is a schematic arrangement of apparatus constituting one of the aforesaid illustrative embodiments of my present invention.
  • Fig. 2 is a schematic arrangement of apparatus 2 Claims. (Cl. 219-47 constituting the second of the aforesaid illustrative embodiments of my present invention.
  • the numeral I l designates a hollow, cylindrical Wave guide made of conductive material, said Wave guide, preferably, being horizontally disposed. Adjacent one end thereof, said wave guide is cut away, as at Il, and connected With a verticallydisposed, container-feeding member I2 in which the containers I3 of the foodstuff being canned may be stacked as shown.
  • the Wave guide may be slotted, as at I4, to receive a cam member I5, the latter being reciprocable by any appropriate mechanism (not shown) to periodically move the lowermost container down the Wave guide and permit the next container to drop into said Wave guide through the action of gravity.
  • High-frequency energy may be fed to the wave guide from any desired source I 6, for example, from a magnetron oscillator.
  • the containers may each comprise a conventional, cylindrical body portion Il made of metal, closed at the ends thereof by disks I8 made of a suitable dielectric material.
  • the dielectric end members I8 of the containers permit said energy to enter said containers to cook the foodstuff contained therein.
  • the numeral I9 designates a horizontally-disposed Wave guide, which is fed from a source 2D of high-frequency energy through a vertical branch 2
  • the containers 22 are, preferably, made entirely of dielectric material. Adjacent one end of the wave guide, there may. for example, be a conveyor system 23 for bringing the containers successively into alignment with the Wave guide opening to enable a reciprocable member 24 to move said container into and through said Wave guide.
  • Apparatus for cooking foodstuff comprising: a source of high-frequency electromagnetic energy; a hollow wave guide, excited by said energy, for propagating the same through a confined region of space; and a container, at least a portion of which is permeable to said energy, receptive of said foodstuff; said container being movable through said wave guide, whereby said foodstuff is subjected to the heating effect of said energy,
  • Apparatus for cookingfoodstui comprising: a source of high-frequency electromagnetic energy; a hollow wave guide, excited by said energy, for propagating the same through a conned region of space; a container, at least a portion of which is permeable to said energy, receptive of said foodstuff; and means for feeding said container through said wave guide in a direction parallel to the direction of propagation of said energy, whereby said foodstuff is subjected to the heating effect of said energy.

Description

Jan. 24, 1950 K. MARSHALL HIGH-FREQUENCY ELECTROMAGNETIC vCOOIKING APPARATUS Filed Oct. 1'7, 1945 Patented Jan. 24, 1950 HIGH-FREQUENCY ELECTROMAGNETIC COOKING APPARATUS v Laurence K. Marshall, Cambridge, Mass., as-
signor to Raytheon Manufacturing Company, Newton, Mass., a corporation of Delaware Application October 17, 1945, Serial No. 622,735
My present invention relates to the art of cool;- ing, and more particularly to the art of cooking by means of electromagnetic energy.
While not limited thereto, my present invention is especially suitable for carrying out the cooking necessary in the canning of foodstuffs, such as fruits, vegetables, etc.
One of the objects of my present invention is to provide simple and inexpensive apparatus for performing the above-mentioned cooking by means of electromagnetic energy.
Another object of my present invention is to provide apparatus which enables the above-mentioned cooking to be more speedily and more efciently carried out than has heretofore been the case.
These, and other objects of my present invention, which Will become more apparent as the detailed description thereof progresses, are attained, briefly, in the following manner:
Instead of packing the foodstuff in a conven-A tional, all-metal can, I provide a special container, which is, at least in part, permeable to electromagnetic energy. For example, While the container may have a conventional, cylindrical body portion made of metal, the end members thereof may be made of a dielectric material, such as a suitable plastic. Or, if desired, the entire container may be made of such a plastic, the idea being that the container be so constructed as to permit high-frequency energy to pass through the same to cook the foodstui contained therein.
A plurality of such containers is successively fed through a Wave guide which is excited from any desired source of high-frequency energy, for example, from a magnetron oscillator. It is preferred that the containers move through the wave guide in the same direction as the direction of propagation of the high-frequency energy.
In the accompanying specification I shall describe, and in the annexed drawing show, two illustrative embodiments of the cooking apparatus of my present invention. It is, however, to be clearly understood that I do not Wish to be limited to the details herein shown and described for purposes of illustration only, inasmuch as changes therein may be made Without the exercise of invention, and Within the true spirit and scope of the claims hereto appended.
In said drawing,
Fig. i is a schematic arrangement of apparatus constituting one of the aforesaid illustrative embodiments of my present invention; and
Fig. 2 is a schematic arrangement of apparatus 2 Claims. (Cl. 219-47 constituting the second of the aforesaid illustrative embodiments of my present invention.
Referring now more in detail to the aforesaid illustrative embodiments of my present inven- I tion, with particular reference to the form thereof shown in Fig. 1 of the drawing, the numeral I l designates a hollow, cylindrical Wave guide made of conductive material, said Wave guide, preferably, being horizontally disposed. Adjacent one end thereof, said wave guide is cut away, as at Il, and connected With a verticallydisposed, container-feeding member I2 in which the containers I3 of the foodstuff being canned may be stacked as shown. Diametrically opposite the cutaway portion I I, the Wave guide may be slotted, as at I4, to receive a cam member I5, the latter being reciprocable by any appropriate mechanism (not shown) to periodically move the lowermost container down the Wave guide and permit the next container to drop into said Wave guide through the action of gravity. High-frequency energy may be fed to the wave guide from any desired source I 6, for example, from a magnetron oscillator.
In the form of my present invention under consideration, the containers may each comprise a conventional, cylindrical body portion Il made of metal, closed at the ends thereof by disks I8 made of a suitable dielectric material. As the energy from the source I6 is propagated down the Wave guide, the dielectric end members I8 of the containers permit said energy to enter said containers to cook the foodstuff contained therein.
In the form of my present invention shown in Fig. 2 of the drawing, the numeral I9 designates a horizontally-disposed Wave guide, which is fed from a source 2D of high-frequency energy through a vertical branch 2|. In this case, the containers 22 are, preferably, made entirely of dielectric material. Adjacent one end of the wave guide, there may. for example, be a conveyor system 23 for bringing the containers successively into alignment with the Wave guide opening to enable a reciprocable member 24 to move said container into and through said Wave guide.
This completes the description of the aforesaid illustrative embodiments of my present invention. It will be noted from all of the foregoing that the apparatus employed is simple and inexpensive, and enables the speedy and efficient carrying out of the cooking necessary in the canning of foodstuffs, such as fruits, vegetables, etc.
Other objects and advantages of my present invention will readily occur to those skilled in the art to which the same relates.
What is claimed is:
l. Apparatus for cooking foodstuff comprising: a source of high-frequency electromagnetic energy; a hollow wave guide, excited by said energy, for propagating the same through a confined region of space; and a container, at least a portion of which is permeable to said energy, receptive of said foodstuff; said container being movable through said wave guide, whereby said foodstuff is subjected to the heating effect of said energy,
2. Apparatus for cookingfoodstui comprising: a source of high-frequency electromagnetic energy; a hollow wave guide, excited by said energy, for propagating the same through a conned region of space; a container, at least a portion of which is permeable to said energy, receptive of said foodstuff; and means for feeding said container through said wave guide in a direction parallel to the direction of propagation of said energy, whereby said foodstuff is subjected to the heating effect of said energy.
LAURENCE K. MARSHALL.
4 REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS OTHER REFERENCES @Modern Packaging, vol. 17, February 1944, page 99.
Popular Mechanics, January 1945, page 4l of text.
US622735A 1945-10-17 1945-10-17 High-frequency electromagnetic cooking apparatus Expired - Lifetime US2495415A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545106A (en) * 1948-04-30 1951-03-13 Rca Corp Applicator for radio-frequency heating
US2560903A (en) * 1949-08-27 1951-07-17 Raytheon Mfg Co Wave guide dielectric heating apparatus
US2582806A (en) * 1947-03-18 1952-01-15 American Enka Corp Drying of hollow yarn bodies
US2595748A (en) * 1947-03-14 1952-05-06 Raytheon Mfg Co Heating apparatus
US2603741A (en) * 1946-12-12 1952-07-15 Goodrich Co B F High-frequency heating
US2612596A (en) * 1947-02-18 1952-09-30 Raytheon Mfg Co Microwave heating
US2618735A (en) * 1947-01-11 1952-11-18 Raytheon Mfg Co Heating apparatus
US2622187A (en) * 1947-01-14 1952-12-16 Raytheon Mfg Co Microwave pressure cooker
US2632838A (en) * 1948-03-04 1953-03-24 Gen Electric Ultrahigh-frequency electromag-netic radiation heating method and apparatus
US2648760A (en) * 1950-09-21 1953-08-11 Raytheon Mfg Co Heating apparatus
US2713697A (en) * 1949-07-27 1955-07-26 Gen Electric Molding machine
US2714070A (en) * 1950-04-04 1955-07-26 Raytheon Mfg Co Microwave heating apparatus and method of heating a food package
US2716221A (en) * 1950-09-25 1955-08-23 Philip J Allen Rotatable dielectric slab phase-shifter for waveguide
US2733650A (en) * 1956-02-07 Microwave cooker controls
US2758282A (en) * 1952-03-28 1956-08-07 Gen Precision Lab Inc Transforming microwave energy from rectangular air filled wave guide
US2807698A (en) * 1954-09-14 1957-09-24 A W Brickman Thermatronic processing and containercell combination
US2856497A (en) * 1954-04-29 1958-10-14 Raytheon Mfg Co Dielectric matching devices
JPS4822799B1 (en) * 1970-08-06 1973-07-09
US5290583A (en) * 1992-04-02 1994-03-01 David Reznik Method of electroheating liquid egg and product thereof
US5562024A (en) * 1993-01-22 1996-10-08 Polny, Jr.; Thaddeus J. Apparatus for electroheating food employing concentric electrodes
US5583960A (en) * 1994-06-01 1996-12-10 David Reznik Electroheating apparatus and methods
US5607613A (en) * 1993-09-23 1997-03-04 Reznik; David Electroheating of food products using low frequency current
US5741539A (en) * 1995-06-02 1998-04-21 Knipper; Aloysius J. Shelf-stable liquid egg
WO2009083725A3 (en) * 2007-12-28 2009-10-29 Richard Holliday Combined heater and conveyor
US20210177015A1 (en) * 2019-12-17 2021-06-17 John Bean Technologies Corporation High frequency device for heating food product, and associated systems and methods

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1900573A (en) * 1930-11-19 1933-03-07 Gen Electric Electric heating apparatus
US1972050A (en) * 1932-08-08 1934-08-28 Jesse H Davis High frequency method of and apparatus for exterminating insect life in seed or grain or other materials
US2197122A (en) * 1937-06-18 1940-04-16 Bell Telephone Labor Inc Guided wave transmission
US2325638A (en) * 1941-09-19 1943-08-03 Budd Wheel Co Billet heating apparatus
US2354656A (en) * 1942-01-05 1944-08-01 Annesley Griffith Drill bit
US2398606A (en) * 1943-03-27 1946-04-16 Westinghouse Electric Corp Ultra high frequency power measurement
US2400777A (en) * 1942-12-15 1946-05-21 Westinghouse Electric Corp Electrical power absorber
US2407690A (en) * 1941-05-16 1946-09-17 Bell Telephone Labor Inc Wave guide electrotherapeutic system
US2427094A (en) * 1943-08-31 1947-09-09 Rca Corp Super-high-frequency wattmeter

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1900573A (en) * 1930-11-19 1933-03-07 Gen Electric Electric heating apparatus
US1972050A (en) * 1932-08-08 1934-08-28 Jesse H Davis High frequency method of and apparatus for exterminating insect life in seed or grain or other materials
US2197122A (en) * 1937-06-18 1940-04-16 Bell Telephone Labor Inc Guided wave transmission
US2407690A (en) * 1941-05-16 1946-09-17 Bell Telephone Labor Inc Wave guide electrotherapeutic system
US2325638A (en) * 1941-09-19 1943-08-03 Budd Wheel Co Billet heating apparatus
US2354656A (en) * 1942-01-05 1944-08-01 Annesley Griffith Drill bit
US2400777A (en) * 1942-12-15 1946-05-21 Westinghouse Electric Corp Electrical power absorber
US2398606A (en) * 1943-03-27 1946-04-16 Westinghouse Electric Corp Ultra high frequency power measurement
US2427094A (en) * 1943-08-31 1947-09-09 Rca Corp Super-high-frequency wattmeter

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733650A (en) * 1956-02-07 Microwave cooker controls
US2603741A (en) * 1946-12-12 1952-07-15 Goodrich Co B F High-frequency heating
US2618735A (en) * 1947-01-11 1952-11-18 Raytheon Mfg Co Heating apparatus
US2622187A (en) * 1947-01-14 1952-12-16 Raytheon Mfg Co Microwave pressure cooker
US2612596A (en) * 1947-02-18 1952-09-30 Raytheon Mfg Co Microwave heating
US2595748A (en) * 1947-03-14 1952-05-06 Raytheon Mfg Co Heating apparatus
US2582806A (en) * 1947-03-18 1952-01-15 American Enka Corp Drying of hollow yarn bodies
US2632838A (en) * 1948-03-04 1953-03-24 Gen Electric Ultrahigh-frequency electromag-netic radiation heating method and apparatus
US2545106A (en) * 1948-04-30 1951-03-13 Rca Corp Applicator for radio-frequency heating
US2713697A (en) * 1949-07-27 1955-07-26 Gen Electric Molding machine
US2560903A (en) * 1949-08-27 1951-07-17 Raytheon Mfg Co Wave guide dielectric heating apparatus
US2714070A (en) * 1950-04-04 1955-07-26 Raytheon Mfg Co Microwave heating apparatus and method of heating a food package
US2648760A (en) * 1950-09-21 1953-08-11 Raytheon Mfg Co Heating apparatus
US2716221A (en) * 1950-09-25 1955-08-23 Philip J Allen Rotatable dielectric slab phase-shifter for waveguide
US2758282A (en) * 1952-03-28 1956-08-07 Gen Precision Lab Inc Transforming microwave energy from rectangular air filled wave guide
US2856497A (en) * 1954-04-29 1958-10-14 Raytheon Mfg Co Dielectric matching devices
US2807698A (en) * 1954-09-14 1957-09-24 A W Brickman Thermatronic processing and containercell combination
JPS4822799B1 (en) * 1970-08-06 1973-07-09
US5290583A (en) * 1992-04-02 1994-03-01 David Reznik Method of electroheating liquid egg and product thereof
US5533441A (en) * 1992-04-02 1996-07-09 Reznik; David Apparatus for rapidly cooling liquid egg
US5415882A (en) * 1992-04-02 1995-05-16 Knipper; Aloysius J. Producing extended refrigerated shelf life food without high temperature heating
US5670198A (en) * 1992-04-02 1997-09-23 Reznik; David Method for rapidly cooling liquid egg
US5758015A (en) * 1993-01-22 1998-05-26 Polny, Jr.; Thaddeus J. Methods and apparatus for electroheating food employing concentric electrodes
US5562024A (en) * 1993-01-22 1996-10-08 Polny, Jr.; Thaddeus J. Apparatus for electroheating food employing concentric electrodes
US5571550A (en) * 1993-01-22 1996-11-05 Polny, Jr.; Thaddeus J. Methods for electroheating food employing concentric electrodes
US5771336A (en) * 1993-01-22 1998-06-23 Polny, Jr.; Thaddeus J. Electrically stable methods and apparatus for continuously electroheating food
US5630360A (en) * 1993-01-22 1997-05-20 Polny, Jr.; Thaddeus J. Apparatus for electroheating food employing concentric electrodes
US5607613A (en) * 1993-09-23 1997-03-04 Reznik; David Electroheating of food products using low frequency current
US5609900A (en) * 1993-09-23 1997-03-11 Reznik; David Electroheating of food products using low frequency current
US5636317A (en) * 1994-06-01 1997-06-03 Reznik; David Electroheating apparatus and methods
US5768472A (en) * 1994-06-01 1998-06-16 Reznik; David Apparatus and methods for rapid electroheating and cooling
US5583960A (en) * 1994-06-01 1996-12-10 David Reznik Electroheating apparatus and methods
US5863580A (en) * 1994-06-01 1999-01-26 Reznik; David Electroheating methods
US5741539A (en) * 1995-06-02 1998-04-21 Knipper; Aloysius J. Shelf-stable liquid egg
WO2009083725A3 (en) * 2007-12-28 2009-10-29 Richard Holliday Combined heater and conveyor
US20110024411A1 (en) * 2007-12-28 2011-02-03 Osci-Tek Limited Combined heater and conveyor
US20210177015A1 (en) * 2019-12-17 2021-06-17 John Bean Technologies Corporation High frequency device for heating food product, and associated systems and methods

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