US4213023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency energy apparatus with automatic heating cycle control
Assignee: Hitachi Global Life Solutions Inc
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Filing: 1977-10-04
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Granted: 1980-07-15
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Expires: 1997-10-04
Abstract
Abstract A high frequency energy apparatus is provided in which high frequency energy is supplied into a heating chamber containing an object to be heated for heating the same. A temperature sensor unit senses either the temperature of air within the heating chamber or the temperature of air flowing out of the heating chamber and a memory unit memorizes a sensed air temperature. When a difference between the air temperature sensed and the memorized temperature reaches a preset value, the amount of supply of the high frequency energy is varied. The preset value is varied with the heating time for heating the object more properly.
Inventors
- 👤 Kenji Satoh
- 👤 Hajime Tachikawa
- 👤 Mitsuru Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:22
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6447; H05B6/645; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1927; G05D23/193; G05D23/1931; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
146 words
A high frequency energy apparatus for heating an object to be heated by using high frequency energy comprising: a heating chamber in which the object is placed to be heated; means for generating high frequency energy; means for supplying the high frequency energy generated by said high frequency energy generating means to said heating chamber; first temperature sensing means for sensing the temperature of selected one of air within said heating chamber and air flowing out of said heating chamber; means for memorizing a temperature sensed by said first temperature sensing means at a predetermined time point; comparing means for comparing a temperature being sensed by said first temperature sensing means with the value memorized in said memory means; and means for controlling the supply of high frequency energy from said high frequency energy generating means in accordance with an output signal from said comparing means.
Claim 2
Dependent Claim
146 words
A high frequency energy apparatus for heating an object to be heated by using high frequency energy comprising: a heating chamber in which the object is placed to be heated; means for generating high frequency energy; means for supplying the high frequency energy generated by said high frequency energy generating means to said heating chamber; first temperature sensing means for sensing the temperature of selected one of air within said heating chamber and air flowing out of said heating chamber; means for memorizing a temperature sensed by said first temperature sensing means at a predetermined time point; comparing means for comparing a temperature being sensed by said first temperature sensing means with the value memorized in said memory means; and means for controlling the supply of high frequency energy from said high frequency energy generating means in accordance with an output signal from said comparing means.
Claim 3
Dependent Claim
39 words
The high frequency energy apparatus according to claim 1, further comprising means for correcting heating time by varying the value memorized in said memory means with the lapse of the heating time so as to obtain proper heating time.
Claim 4
Dependent Claim
128 words
The high frequency energy apparatus according to claim 2, wherein said first temperature sensing means comprises means for delivering an electrical signal of a voltage which varies in accordance with a rise of the temperature being sensed, wherein said memory means comprises a capacitor, and means for supplying said electrical signal to said capacitor for a predetermined period, wherein said correcting means comprises discharge means for discharging a charge of said capacitor at a predetermined discharging time constant, and wherein said comparing means comprises a comparator having a first input fed with said electrical signal and a second input fed with the charged voltage of said capacitor and comparing the two inputs to produce said output signal when the difference between the two inputs reaches a predetermined value.
Claim 5
Dependent Claim
35 words
The high frequency energy apparatus according to claim 3, wherein said controlling means comprises electromagnetic relay means actuatable by said output signal produced from said comparator to control the supply of said high frequency energy.
Claim 6
Dependent Claim
18 words
The high frequency energy apparatus according to claim 3, wherein said first temperature sensing means comprises a thermistor.
Claim 7
Dependent Claim
52 words
The high frequency energy apparatus according to claim 5, further comprising a second thermistor disposed at a portion outside said heating chamber, said second thermistor being connected with said first thermistor in series to compensate variations in said electrical signal due to variations in temperature of air flowing into said heating chamber.
Claim 8
Dependent Claim
45 words
The high frequency energy apparatus according to claim 3, wherein said means for supplying said electrical signal to said capacitor comprises a timed switch means which supplies said electrical signal to said capacitor when energized and interrupts this supply a predetermined time after the energization.
Claim 9
Dependent Claim
55 words
The high frequency energy apparatus according to claim 3, further comprising second temperature sensing means disposed at a portion outside said heating chamber, said second temperature sensing means being associated with said first temperature sensing means to compensate variations in said electrical signal due to variations in temperature of air flowing into said heating chamber.
Claim 10
Dependent Claim
26 words
The high frequency energy apparatus according to claim 3, wherein said discharge means comprises a resistor of a predetermined resistance connected in parallel with said capacitor.
Claim 11
Dependent Claim
54 words
The high frequency energy apparatus according to claim 3, further comprising means for applying a DC bias voltage to said second input of said comparator to prevent the input voltage at said second input from being lowered below a predetermined value even when said charged voltage of said capacitor discharges through said discharge means.
Claim 12
Dependent Claim
164 words
The high frequency energy apparatus according to claim 2, wherein said first temperature sensing means comprises means for delivering an electrical signal of a voltage which varies in accordance with a rise of the temperature being sensed, wherein said memory means comprises voltage divider means for dividing the voltage of said electrical signal to deliver a division voltage which is reduced at a predetermined ratio from the voltage of said electrical signal, a capacitor and means for supplying said reduced voltage produced from said voltage divider means to said capacitor for a predetermined period, wherein said correcting means comprises discharge means for discharging a charge of said capacitor at a predetermined discharging time constant, and wherein said comparing means comprises a comparator having a first input fed with said electrical signal and a second input fed with the charged voltage of said capacitor and comparing the two inputs to produce said output signal when the difference between the two inputs reaches a predetermined value.
Claim 13
Dependent Claim
26 words
The high frequency energy apparatus according to claim 11, wherein said voltage divider means comprises a variable resistor for varying said ratio of said division voltage.
Claim 14
Dependent Claim
161 words
The high frequency energy apparatus according to claim 2, wherein said first temperature sensing means comprises means for delivering an electrical signal of a voltage which varies in accordance with a rise of the temperature being sensed, wherein said memory means comprises a capacitor, means for supplying said electrical signal to said capacitor for a predetermined period, and voltage divider means for dividing the charged voltage of said capacitor to deliver a division voltage which is reduced at a predetermined ratio from the charged voltage of said capacitor, wherein said correcting means comprises discharge means for discharging a charge of the capacitor at a predetermined dischargeing time constant, and wherein said comparing means comprises a comparator having a first input fed with said electrical signal and a second input fed with said reduced voltage produced from said voltage divider means and comparing the two inputs to produce said output signal when the difference between the two inputs reaches a predetermined value.
Claim 15
Dependent Claim
26 words
The high frequency energy apparatus according to claim 13, wherein said voltage divider means comprises a variable resistor for varying said ratio of said division voltage.
Claim 16
Dependent Claim
19 words
The high frequency energy apparatus according to claim 1, wherein said first temperature sensing means comprises a first thermistor.
Claim 17
Dependent Claim
108 words
The high frequency energy apparatus according to claim 1, wherein said first temperature sensing means comprises means for delivering an electrical signal of a voltage which varies in accordance with a rise of the temperature being sensed, wherein said memory means comprises a capacitor and means for supplying said electrical signal to said capacitor for a predetermined period, and wherein said comparing means comprises a comparator having a first input fed with said electrical signal and a second input fed with a charged voltage of said capacitor and comparing the two inputs to produce said output signal when the difference between the two inputs reaches a predetermined value.
Claim 18
Dependent Claim
35 words
The high frequency energy apparatus according to claim 16, wherein said controlling means comprises electromagnetic relay means actuatable by said output signal produced from said comparator to control the supply of said high frequency energy.
Claim 19
Dependent Claim
18 words
The high frequency energy apparatus according to claim 16, wherein said first temperature sensing means comprises a thermistor.
Claim 20
Dependent Claim
52 words
The high frequency energy apparatus according to claim 18, further comprising a second thermistor disposed at a portion outside said heating chamber, said second thermistor being connected with said first thermistor in series to compensate variations in said electrical signal due to variations in temperature of air flowing into said heating chamber.
Claim 21
Dependent Claim
44 words
The high frequency energy apparatus according to claim 16, wherein said means for supplying said electrical signal to said capacitor comprises timed switch means which supplies said electrical signal to said capacitor when energized and interrupts this supply a predetermined time after the energization.
Claim 22
Dependent Claim
55 words
The high frequency energy apparatus according to claim 16, further comprising second temperature sensing means disposed at a position outside said heating chamber, said second temperature sensing means being associated with said first temperature sensing means to compensate variations in said electrical signal due to variations in temperature of air flowing into said heating chamber.
Claim 23
Dependent Claim
144 words
The high frequency energy apparatus according to claim 1, wherein said first temperature sensing means comprises means for delivering an electrical signal of a voltage which varies in accordance with a rise of the temperature being sensed, wherein said memory means comprises voltage divider means for dividing the voltage of said electrical signal to deliver a division voltage which is reduced at a predetermined ratio from the voltage of said electrical signal, a capacitor, and means for supplying said reduced voltage produced from said voltage divider means to said capacitor for a predetermined period, and wherein said comparing means comprises a comparator having a first input fed with said electrical signal and a second input fed with a charged voltage of said capacitor and comparing the two inputs to produce said output signal when the difference between the two inputs reaches a predetermined value.
Claim 24
Dependent Claim
26 words
The high frequency energy apparatus according to claim 22, wherein said voltage divider means comprises a variable resistor for varying said ratio of said division voltage.
Claim 25
Dependent Claim
138 words
The high frequency energy apparatus according to claim 1, wherein said first temperature sensing means comprises means for delivering an electrical signal of a voltage which varies in accordance with a rise of the temperature being sensed, wherein said memory means comprises a capacitor, means for supplying said electrical signal to said capacitor for a predetermined period, and voltage divider means for dividing a charged voltage of said capacitor to deliver a division voltage which is reduced at a predetermined ratio from said charged voltage, and wherein said comparing means comprises a comparator having a first input fed with said electrical signal and a second input fed with said reduced voltage produced from said voltage divider means and comparing the two inputs to produce said output signal when the difference between the two inputs reaches a predetermined value.
Claim 26
Dependent Claim
26 words
The high frequency energy apparatus according to claim 24, wherein said voltage divider means comprises a variable resistor for varying said ratio of said division voltage.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |