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GB1298163A - Safety device for preventing radiation leakage from microwave producing apparatus - Google Patents

Safety device for preventing radiation leakage from microwave producing apparatus

Info

Publication number
GB1298163A
GB1298163A GB61206/70A GB6120670A GB1298163A GB 1298163 A GB1298163 A GB 1298163A GB 61206/70 A GB61206/70 A GB 61206/70A GB 6120670 A GB6120670 A GB 6120670A GB 1298163 A GB1298163 A GB 1298163A
Authority
GB
United Kingdom
Prior art keywords
contacts
relay
tube
microwave
oven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB61206/70A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Publication of GB1298163A publication Critical patent/GB1298163A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6414—Aspects relating to the door of the microwave heating apparatus
    • H05B6/6417—Door interlocks of the microwave heating apparatus and related circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Drying Of Solid Materials (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

1298163 Testing microwave equipment; microwave ovens INDUSTRIE A ZANUSSI SpA 23 Dec 1970 [17 Jan 1970] 61206/70 Headings H5H and H4L In a device for protection against radiation leakage in microwave generating apparatus, as described, for an oven, a radiation-responsive gas tube 16 is located in the area where radiation leakage can occur and is connected in series with a relay coil 19 controlling normally open contacts 26 in the energizing circuit of the microwave generator 4, a resistor 20 and a potentiometer 21. Potentiometer 21 controls a diode 22 in series with a further relay coil 25 operating normally closed contacts 27 in series with the contacts 26. The device is energized via a full wave rectifier 24 when push-button 23 is closed and the small current flowing through the tube 16 is then sufficient to energize relay 19 and close contacts 26. The resistance of the tube 16 remains relatively high so that diode 22 is cut off, relay 25 is not energized and contacts 27 remain closed. Should a radiation leak occur or the oven door be opened, the resistance of the tube 16 is decreased, diode 22 conducts and relay 25 is energized to open contacts 27. Relay 19 is released to open contacts 26 should the tube break. Oven construction.-Access to the cooking chamber 2, Fig. 2, is via an opening 5 each side of which carries a resilient blade 6, the blades being pressed against the oven wall when the door 7 is closed to provide sealing against radiation leakage. The antenna 3 of a microwave generator 4 is arranged to protrude into the chamber 2. The door is provided with a transparent central area 15 and may be locked in the open or shut position by notches 10, 11 respectively on the lever 12.
GB61206/70A 1970-01-17 1970-12-23 Safety device for preventing radiation leakage from microwave producing apparatus Expired GB1298163A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1951070 1970-01-17

Publications (1)

Publication Number Publication Date
GB1298163A true GB1298163A (en) 1972-11-29

Family

ID=11158636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB61206/70A Expired GB1298163A (en) 1970-01-17 1970-12-23 Safety device for preventing radiation leakage from microwave producing apparatus

Country Status (5)

Country Link
US (1) US3679908A (en)
JP (1) JPS541939B1 (en)
DE (1) DE2029559C3 (en)
FR (1) FR2080555B3 (en)
GB (1) GB1298163A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4349783A (en) 1978-02-16 1982-09-14 Robson William F Ground isolated electrostatic field detector

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746824A (en) * 1972-08-07 1973-07-17 Gen Electric Microwave oven leakage radiation detecting device
US3900713A (en) * 1973-03-26 1975-08-19 Micro Devices Corp Thermal limiter construction and electrical switch and system utilizing the same
US4253092A (en) * 1979-04-19 1981-02-24 Connah John F Jun Microwave leakage detector
US4529855A (en) * 1982-04-12 1985-07-16 Henry Fleck Microwave radiation detector
DE3236290C2 (en) * 1982-09-30 1985-08-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Device for monitoring the closed status of doors on microwave ovens
JPH0179471U (en) * 1987-11-16 1989-05-29
US5309097A (en) * 1992-04-15 1994-05-03 Enrique Rodriguez Video display terminal magnetic field detector
US6346692B1 (en) * 1999-09-20 2002-02-12 Agere Systems Guardian Corp. Adaptive microwave oven
SE530248C2 (en) * 2006-08-25 2008-04-08 Powerwave Technologies Sweden Active lightning protection
EP2152047A1 (en) 2008-08-04 2010-02-10 Topinox Sarl Safety device for detecting leak radiation
US10009965B2 (en) 2015-01-28 2018-06-26 Samsung Electronics Co., Ltd. Gas detection apparatus, cooking apparatus, and method of controlling the apparatuses
DE102019207978A1 (en) 2019-05-30 2020-12-03 BSH Hausgeräte GmbH Household microwave device with detection device for detecting microwave leakage radiation
DE102019210119A1 (en) 2019-07-09 2021-01-14 BSH Hausgeräte GmbH Household microwave oven with mode variation device
DE102020208535A1 (en) 2020-07-08 2022-01-13 BSH Hausgeräte GmbH Detection of arcing during a microwave treatment process of a household microwave oven
JP7415898B2 (en) * 2020-12-02 2024-01-17 株式会社島津製作所 X-ray imaging device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063010A (en) * 1960-04-25 1962-11-06 Alfred W Richardson Microwave dosimeter
US3350702A (en) * 1965-01-26 1967-10-31 Ruth A Herman Infrared detection system for fault isolation and failure prediction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4349783A (en) 1978-02-16 1982-09-14 Robson William F Ground isolated electrostatic field detector

Also Published As

Publication number Publication date
DE2029559B2 (en) 1974-01-17
US3679908A (en) 1972-07-25
FR2080555B3 (en) 1973-10-19
FR2080555A3 (en) 1971-11-19
DE2029559A1 (en) 1971-07-29
JPS541939B1 (en) 1979-01-31
DE2029559C3 (en) 1974-08-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee