Patent US3699299A successfully refreshed from Google Patents.
US3699299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency heating apparatus
Assignee: Toshiba Corp
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Filing: 1971-05-27
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Granted: 1972-10-17
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Expires: 1991-05-27
Abstract
Abstract In a high frequency heating apparatus comprising a cabinet defining therein a heating chamber, a high frequency oscillator for radiating a high frequency electromagnetic wave in the heating chamber, a door mounted on the cabinet for closing the heating chamber, a door operating handle, and a locking member housed in the cabinet for locking the door in the closed position, there is provided a switch disposed in the cabinet for controlling the operation of the high frequency oscillator, and means interlocked with the handle for operating the switch to deenergize the high frequency oscillator when the locking device releases the door.
Inventors
- 👤 Shiro Umezu
- 👤 Tetsuo Hashimura
- 👤 Akira Sekido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:37
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6414; H05B6/6417
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
224 words
A high frequency heating apparatus comprising: a cabinet defining therein a heating chamber having an access opening at one side thereof; a high frequency oscillator for radiating high frequency electromagnetic waves in said heating chamber; a door mounted on said cabinet for selectively opening and closing said access opening; a door operating handle mounted on said door, said handle being operable to release and lock positions to release and lock said door, respectively; switch means including a switch disposed in said cabinet and coupled to said high frequency oscillator for controlling the operation of said high frequency oscillator; switch operating means operatively coupled to and extending from said handle, and positively engaging and operating said switch means to a first position when said door is closed and locked to enable said high frequency oscillator, and operating said switch means to a second position to deenergize said high frequency oscillator when said handle is in its release position to release said door; at least one lock arm extending from said handle toward the interior of said cabinet and operatively coupled to said handle; and catch means interior of said cabinet for engaging said lock arm when said door is in its closed position and said handle is in its lock position, and for releasing said lock arm when said handle is in its release position.
Claim 2
Dependent Claim
224 words
A high frequency heating apparatus comprising: a cabinet defining therein a heating chamber having an access opening at one side thereof; a high frequency oscillator for radiating high frequency electromagnetic waves in said heating chamber; a door mounted on said cabinet for selectively opening and closing said access opening; a door operating handle mounted on said door, said handle being operable to release and lock positions to release and lock said door, respectively; switch means including a switch disposed in said cabinet and coupled to said high frequency oscillator for controlling the operation of said high frequency oscillator; switch operating means operatively coupled to and extending from said handle, and positively engaging and operating said switch means to a first position when said door is closed and locked to enable said high frequency oscillator, and operating said switch means to a second position to deenergize said high frequency oscillator when said handle is in its release position to release said door; at least one lock arm extending from said handle toward the interior of said cabinet and operatively coupled to said handle; and catch means interior of said cabinet for engaging said lock arm when said door is in its closed position and said handle is in its lock position, and for releasing said lock arm when said handle is in its release position.
Claim 3
Dependent Claim
41 words
Apparatus according to claim 1 wherein said cabinet is provided with an opening and inwardly inclined surfaces defining said opening for guiding said switch operating means during closure of said door to securely operate said switch when said door is closed.
Claim 4
Dependent Claim
47 words
Apparatus according to claim 1 wherein said at least one lock arm has a hook at the end thereof which engages said catch means in the inside of said cabinet, and wherein said switch operating means comprises a switch operating lever secured to said door operating handle.
Claim 5
Dependent Claim
23 words
Apparatus according to claim 3 wherein said switch is housed in a housing having an opening therein for passing said switch operating lever.
Claim 6
Dependent Claim
14 words
Apparatus according to claim 4 wherein said housing includes means forming said catch means.
Claim 7
Dependent Claim
28 words
Apparatus according to claim 5 wherein said catch means has at least one projection extending from said housing so as to engage said at least one lock arm.
Claim 8
Dependent Claim
19 words
Apparatus according to claim 5 wherein said housing and said catch means are integrally formed of a synthetic resin.
Claim 9
Dependent Claim
21 words
Apparatus according to claim 4 wherein said opening is bounded by inwardly inclined surfaces of the front side of said housing.
Claim 10
Dependent Claim
95 words
Apparatus according to claim 2 wherein said switch means includes a lever pivotally mounted in said cabinet for selectively operating said switch, and wherein said switch operating means includes a switch operating lever secured to said door operating handle and extending from said door inwardly of said cabinet, said inclined surfaces guiding said switch operating lever below said pivotally mounted lever during closure of said door, said switch operating lever engaging and pivoting said pivotally mounted lever when said lock arm engages said catch means to thereby operate said switch means to said first position.
Claim 11
Dependent Claim
38 words
Apparatus according to claim 1 wherein said lock arm includes means for guiding said switch operating means to positive engagement with said switch means to operate said switch means to said first position when said door is closed.
Claim 12
Dependent Claim
39 words
Apparatus according to claim 10 wherein said guiding means included in said lock arm engages a surface of said cabinet during closure of said door to guide said switch operating means into the positive engagement with said switch means.
Claim 13
Dependent Claim
61 words
Apparatus according to claim 10 wherein said switch operating means operates said switch means to said first position when said catch means is engaged with said lock arm. 13 Apparatus according to claim 9 wherein said lock arm, switch operating means and door operating handle are integral, said door operating handle simultaneously operating said lock arm and said switch operating means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |