US4177370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable cooking mode selector in a microwave oven
Assignee: Sharp Corp
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Filing: 1978-05-25
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Granted: 1979-12-04
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Expires: 1998-05-25
Abstract
Abstract A control cam plate having a periphery divided into four sections of different radiuses is driven to rotate by a cam motor mounted on a supporting table. The supporting table is rotatably secured in a microwave oven, and one end of the supporting table is fixed to a manually operable selection lever for shifting the location of the control cam plate. A switching means is associated with the control cam plate for controlling a repetition rate of a power supply to a magnetron employed in the microwave oven in response to slide operation of the manually operable selection lever. In a preferred form, a menu drum is provided in such a manner as to rotate in response to the slide operation of the manually operable selection lever, thereby facilitating recognition of cooking modes.
Inventors
- 👤 Akira Otani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6435; H05B6/6408; H05B6/6411
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
179 words
A variable cooking mode selector for a microwave oven comprising: a first supporting means disposed in a microwave oven housing; a second supporting means movably mounted on the first supporting means; a cam motor mounted on the second supporting means; a cam plate fixed to a cam motor shaft of said cam motor, the cam plate having a periphery divided into plural sections of different radiuses, each of said sections providing a different repetition rate of energization of a magnetron employed in said microwave oven; a switching means mounted on the first supporting means, said switching means functioning to energize a magnetron employed in the microwave oven; an actuator lever associated with said switching means for closing or opening said switching means in response to the revolution of a selected section of said cam plate; and control means fixed to said second supporting means for selecting the section of said cam plate which controls said actuator lever; whereby a repetition rate of the magnetron energization is varied through the use of said control means to implement selected cooking modes.
Claim 2
Dependent Claim
179 words
A variable cooking mode selector for a microwave oven comprising: a first supporting means disposed in a microwave oven housing; a second supporting means movably mounted on the first supporting means; a cam motor mounted on the second supporting means; a cam plate fixed to a cam motor shaft of said cam motor, the cam plate having a periphery divided into plural sections of different radiuses, each of said sections providing a different repetition rate of energization of a magnetron employed in said microwave oven; a switching means mounted on the first supporting means, said switching means functioning to energize a magnetron employed in the microwave oven; an actuator lever associated with said switching means for closing or opening said switching means in response to the revolution of a selected section of said cam plate; and control means fixed to said second supporting means for selecting the section of said cam plate which controls said actuator lever; whereby a repetition rate of the magnetron energization is varied through the use of said control means to implement selected cooking modes.
Claim 3
Dependent Claim
21 words
The variable cooking mode selector of claim 1 wherein said second supporting means is pivotally mounted on said first supporting means.
Claim 4
Dependent Claim
20 words
The variable cooking mode selector of claim 1 wherein said actuator lever is pivotally mounted on said first supporting means.
Claim 5
Dependent Claim
30 words
The variable cooking mode selector of claim 1, wherein said switching means is normally closed and is opened when said selected section of said cam plate engages said actuator lever.
Claim 6
Dependent Claim
29 words
The variable cooking mode selector of claim 1, which further comprises indicator means associated with said second supporting means for indicating the cooking mode selected by said control means.
Claim 7
Dependent Claim
43 words
The variable cooking mode selector of claim 1, wherein said control means includes means for shifting the position of said second supporting means with respect to said first supporting means to selectively vary the distance between said cam plate and said actuator lever.
Claim 8
Dependent Claim
179 words
A variable cooking mode selector for a microwave oven comprising: a first supporting means disposed in a microwave oven housing; a second supporting means movably mounted on the first supporting means; a cam motor mounted on the first supporting means; a cam plate fixed to a cam motor shaft of said cam motor, a cam plate having a periphery divided into plural sections of different radiuses, each of said sections providing a different repetition rate of energization of a magnetron employed in said microwave oven; a switching means mounted on the second supporting means, said switching means functioning to energize a magnetron employed in the microwave oven; an actuator lever associated with said switching means for closing or opening said switching means in response to the revolution of a selected section of said cam plate; and control means fixed to said second supporting means for selecting the section of said cam plate which controls said actuator lever; whereby a repetition rate of the magnetron energization is varied through the use of said control means to implement selected cooking modes.
Claim 9
Dependent Claim
179 words
A variable cooking mode selector for a microwave oven comprising: a first supporting means disposed in a microwave oven housing; a second supporting means movably mounted on the first supporting means; a cam motor mounted on the first supporting means; a cam plate fixed to a cam motor shaft of said cam motor, a cam plate having a periphery divided into plural sections of different radiuses, each of said sections providing a different repetition rate of energization of a magnetron employed in said microwave oven; a switching means mounted on the second supporting means, said switching means functioning to energize a magnetron employed in the microwave oven; an actuator lever associated with said switching means for closing or opening said switching means in response to the revolution of a selected section of said cam plate; and control means fixed to said second supporting means for selecting the section of said cam plate which controls said actuator lever; whereby a repetition rate of the magnetron energization is varied through the use of said control means to implement selected cooking modes.
Claim 10
Dependent Claim
21 words
The variable cooking mode selector of claim 7, wherein said second supporting means is pivotally mounted on said first supporting means.
Claim 11
Dependent Claim
22 words
The variable cooking mode selector of claim 7 or 8 wherein said actuator lever is pivotally mounted on said first supporting means.
Claim 12
Dependent Claim
30 words
The variable cooking mode selector of claim 7, wherein said switching means is normally closed and is opened when said selected section of said cam plate engages said actuator lever.
Claim 13
Dependent Claim
29 words
The variable cooking mode selector of claim 7, which further comprises indicator means associated with said second supporting means for indicating the cooking mode selected by said control means.
Claim 14
Dependent Claim
43 words
The variable cooking mode selector of claim 7, wherein said control means includes means for shifting the position of said second supporting means with respect to said first supporting means to selectively vary the distance between said cam plate and said actuator level.
Claim 15
Dependent Claim
112 words
A variable cooking mode selector for a microwave oven comprising: a control cam plate; a control switch for energizing a magnetron employed in the microwave oven; actuator means for closing the control switch in response to the revolution of the control cam plate; shift means for varying the distance between the control cam plate and the actuator means, whereby the repetition rate of the energization of the magnetron is varied in response to the variation of the distance between the control cam plate and the actuator means; and a menu drum which rotates in unison with the movement of said shift means for indicating the cooking mode selected by said shift means.
Claim 16
Dependent Claim
112 words
A variable cooking mode selector for a microwave oven comprising: a control cam plate; a control switch for energizing a magnetron employed in the microwave oven; actuator means for closing the control switch in response to the revolution of the control cam plate; shift means for varying the distance between the control cam plate and the actuator means, whereby the repetition rate of the energization of the magnetron is varied in response to the variation of the distance between the control cam plate and the actuator means; and a menu drum which rotates in unison with the movement of said shift means for indicating the cooking mode selected by said shift means.
Claim 17
Dependent Claim
40 words
The variable cooking mode selector of claim 13, wherein siad control cam plate has the periphery thereof divided into plural sections of different radiuses and said shifting means causes said actuator means to selectively engage said sections of different radiuses.
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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |