US4109129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency energy apparatus having automatic final temperature compensator
Assignee: Hitachi Global Life Solutions Inc
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Filing: 1976-12-21
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Granted: 1978-08-22
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Expires: 1996-12-21
Abstract
Abstract A high frequency energy apparatus for heating an object contained in a heating chamber by high frequency energy which is supplied to the chamber. The temperature of the air in the heating chamber or flowing out thereof is detected. When the temperature of the air reaches a predetermined level, the high frequency energy is controlled. The predetermined level is also changed with the heating time.
Inventors
- 👤 Kenji Satoh
- 👤 Mitsuru Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:26
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6447; H05B6/645; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1909; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
124 words
A high frequency energy apparatus for heating an object with high frequency energy, comprising: a heating chamber for containing and heating said object; means for generating the high frequency energy; means for introducing to said heating chamber the high frequency energy generated by said high frequency energy generating means; means for relatively measuring the temperature of the object being heated; means for controlling the amount of the high frequency energy supplied to said heating chamber from said high frequency energy generating means when the value measured by said measuring means reaches a value corresponding to a predetermined reference value; and reference value correcting means for automatically varying said predetermined reference value in the same direction of change with the lapse of the heating time.
Claim 2
Dependent Claim
124 words
A high frequency energy apparatus for heating an object with high frequency energy, comprising: a heating chamber for containing and heating said object; means for generating the high frequency energy; means for introducing to said heating chamber the high frequency energy generated by said high frequency energy generating means; means for relatively measuring the temperature of the object being heated; means for controlling the amount of the high frequency energy supplied to said heating chamber from said high frequency energy generating means when the value measured by said measuring means reaches a value corresponding to a predetermined reference value; and reference value correcting means for automatically varying said predetermined reference value in the same direction of change with the lapse of the heating time.
Claim 3
Dependent Claim
36 words
A high frequency energy apparatus according to claim 1, in which said measuring means measures the temperature of an air in said heating chamber in order to relatively measure the temperature of the object being heated.
Claim 4
Dependent Claim
46 words
A high frequency energy apparatus according to claim 2, in which said measuring means includes a temperature-sensitive element, the temperature measured by said measuring means is indicated in the form of a voltage corresponding to it, and said reference value is also given as a voltage.
Claim 5
Dependent Claim
40 words
A high frequency energy apparatus according to claim 3, in which said reference value correcting means includes a capacitor and means for charging and discharging said capacitor, said reference voltage being a voltage corresponding to the voltage across said capacitor.
Claim 6
Dependent Claim
38 words
A high frequency energy apparatus according to claim 4, in which, in use, said capacitor is preliminarily charged up to a predetermined level by said charge/discarge means and subsequently discharged with a time constant of said charge/discharge means.
Claim 7
Dependent Claim
68 words
A high frequency energy apparatus according to claim 5, in which said high frequency energy supply amount control means includes means for comparing said voltage corresponding to said measured temperature with said reference voltage so that the amount of the high frequency energy supplied to said heating chamber from said high frequency energy generating means is controlled when the output of said comparator means reaches a predetermined level.
Claim 8
Dependent Claim
77 words
A high frequency energy apparatus according to claim 6, in which said comparator means is differential amplifier having two input terminals, said voltage corresponding to said measured temperature being applied to one of said two input terminals of said differential amplifier, said reference voltage being applied to the other input terminal of said differential amplifier, said differential amplifier having an output circuit including an electromagnetic relay for controlling the operation of said high frequency energy generating means.
Claim 9
Dependent Claim
37 words
A high frequency energy apparatus according to claim 4, in which, in use, said capacitor is preliminarily discharged to a predetermined level by said charge/discharge means and subsequently charged with a time constant of said charge/discharge means.
Claim 10
Dependent Claim
68 words
A high frequency energy apparatus according to claim 8, in which said high frequency energy supply amount control means includes means for comparing said voltage corresponding to said measured temperature with said reference voltage so that the amount of the high frequency energy supplied to said heating chamber from said high frequency energy generating means is controlled when the output of said comparator means reaches a predetermined level.
Claim 11
Dependent Claim
78 words
A high frequency energy apparatus according to claim 9, in which said comparator means is a differential amplifier having two input terminals, said voltage corresponding to said measured temperature being applied to one of said two input terminals of said differential amplifier, said reference voltage being applied to the other input terminal of said differential amplifier, said differential amplifier having an output circuit including an electromagnetic relay for controlling the operation of said high frequency energy generating means.
Claim 12
Dependent Claim
39 words
A high frequency energy apparatus according to claim 4, in which a DC voltage is coupled to a low potential side of said capacitor to prevent said reference voltage from decreasing below a predetermined value during the heating period.
Claim 13
Dependent Claim
38 words
A high frequency energy apparatus according to claim 1, in which said measuring means measures the temperature of an air flowing out of said heating chamber, in order to relatively measure the temperature of the object being heated.
Claim 14
Dependent Claim
46 words
A high frequency energy apparatus according to claim 12, in which said measuring means includes a temperature-sensitive element, the temperature measured by said measuring means is indicated in the form of a voltage corresponding to it, and said reference value is also given as a voltage.
Claim 15
Dependent Claim
40 words
A high frequency energy apparatus according to claim 13, in which said reference value correcting means includes a capacitor and means for charging and discharging said capacitor, said reference voltage being a voltage corresponding to the voltage across said capacitor.
Claim 16
Dependent Claim
38 words
A high frequency energy apparatus according to claim 14, in which, in use, said capacitor is preliminarily charged up to a predetermined level by said charge/discharge means and subsequently discharged with a time constant of said charge/discharge means.
Claim 17
Dependent Claim
69 words
A high frequency energy apparatus according to claim 15, in which said high frequency energy supply emount control means includes comparator means for comparing said voltage corresponding to said measured temperature with said reference voltage so that the amount of the high frequency energy supplied to said heating chamber from said high frequency energy generating means is controlled when the output of said comparator means reaches a predetermined level.
Claim 18
Dependent Claim
78 words
A high frequency energy apparatus according to claim 16, in which said comparator means is a differential amplifier having two input terminals, said voltage corresponding to said measured temperature being applied to one of said two input terminals of said differential amplifier, said reference voltage being applied to the other input terminal of said differential amplifier, said differential amplifier having an output circuit including an electromagnetic relay for controlling the operation of said high frequency energy generating means.
Claim 19
Dependent Claim
37 words
A high frequency energy apparatus according to claim 14, in which, in use, said capacitor is preliminarily dischared to a predetermined level by said charge/discharge means and subsequently charged with a time constant of said charge/discharge means.
Claim 20
Dependent Claim
69 words
A high frequency energy apparatus according to claim 18, in which said high frequency energy supply amount control means includes comparator means for comparing said voltage corresponding to said measured temperature with said reference voltage so that the amount of the high frequency energy supplied to said heating chamber from said high frequency energy generating means is controlled when the output of said comparator means reaches a predetermined level.
Claim 21
Dependent Claim
78 words
A high frequency energy apparatus according to claim 19, in which said comparator means is a differential amplifier having two input terminals, said voltage corresponding to said measured temperature being applied to one of said two input terminals of said differential amplifier, said reference voltage being applied to the other input terminal of said differential amplifier, said differential amplifier having an output circuit including an electromagnetic relay for controlling the operation of said high frequency energy generating means.
Claim 22
Dependent Claim
39 words
A high frequency energy apparatus according to claim 14, in which a DC voltage is coupled to a low potential side of said capacitor to prevent said reference voltage from decreasing below a predetermined value during the heating period.
Claim 23
Dependent Claim
53 words
A high frequency energy apparatus according to claim 1, in which said temperature measuring means measures the difference between the temperature of the atmosphere surrounding said high frequency energy apparatus and the temperature of an air inside of said heating chamber in order to relatively detect the temperature of said object being heated.
Claim 24
Dependent Claim
54 words
A high frequency energy apparatus according to claim 1, in which said temperature measuring means measures the difference between the temperature of the atmosphere surrounding said high frequency energy apparatus and the temperature of an air flowing out of said heating chamber in order to relatively detect the temperature of said object being heated.
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) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |