US3885200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring arrangement for a blower
Assignee: Siemens AG
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Filing: 1973-11-26
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Granted: 1975-05-20
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Expires: 1993-11-26
Abstract
Abstract A monitoring arrangement for a blower in which a heat sensor is placed in the air stream of the blower along with a current carrying resistor, with the sensor arranged a distance from the resistor so that should cooling of the resistor by the air stream cease, a malfunction will be sensed by the sensor and appropriate action may be taken. Also shown is an additional sensor placed next to the resistor which ensures that the resistor is operating and which will provide an indication if for any reason the temperature close to the resistor is not elevated as it should be.
Inventors
- 👤 Peter Burkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:10
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/182
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
A monitoring arrangement for a blower comprising: a. a current carrying resistor in parallel with the blower motor and physically arranged in the air stream of the blower; b. first means for sensing temperature spaced from said resistor said means including a first switch, said first means adapted to operate said first switch when the temperature exceeds a first predetermined limit; c. second means for sensing temperature said means being placed in the immediate vicinity of said resistor and including a second switch adapted to operate if the temperature of said resistor falls below a second predetermined limit; and d. indicator means supplied by said first and second switches in series.
Claim 2
Dependent Claim
111 words
A monitoring arrangement for a blower comprising: a. a current carrying resistor in parallel with the blower motor and physically arranged in the air stream of the blower; b. first means for sensing temperature spaced from said resistor said means including a first switch, said first means adapted to operate said first switch when the temperature exceeds a first predetermined limit; c. second means for sensing temperature said means being placed in the immediate vicinity of said resistor and including a second switch adapted to operate if the temperature of said resistor falls below a second predetermined limit; and d. indicator means supplied by said first and second switches in series.
Claim 3
Dependent Claim
15 words
A monitoring arrangement as in claim 1 wherein said indicator means comprises an indicator relay.
Claim 4
Dependent Claim
18 words
The invention according to claim 1 wherein said first means for sensing temperature comprise a first bi-metallic switch.
Claim 5
Dependent Claim
21 words
The invention according to claim 1 wherein said first and second means for sensing temperature comprise first and second bi-metallic switches.
Claim 6
Dependent Claim
18 words
The invention according to claim 2 and further including indicating means coupled to the contacts of said relay.
References Cited (Backward Citations)
US3309574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |