US4802055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transient voltage surge suppressor
Assignee: Wiremold Co
•
Filing: 1987-10-26
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Granted: 1989-01-31
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Expires: 2007-10-26
Abstract
Abstract A transient voltage surge suppressor including first and second clamping stages with a surge reactor between the stages. The first stage comprises a metal oxide varistor and the second stage comprises a silicon surge suppressor diode. The surge reactor comprises first and second coils wound with the same polarity on a single ferromagnetic core.
Inventors
- 👤 Howard L. Beckerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:53
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
194 words
A transient voltage surge suppressor comprising: first connection means for connecting said suppressor to AC power lines; second connection means connecting said suppressor to a load receptacle having a plurality of terminals; first voltage clamping means connected across said first connection means to clamp a transient voltage surge appearing on said first connection means to a first level; second voltage clamping means connected across said second connection means to clamp a transient voltage surge appearing thereacross to a second level, said second level being less than said first level and protective of a load connected to said receptacle terminals; and surge reactor means connected between said first and second voltage clamping means to absorb and dissipate a transient voltage surge energy which is a result of the difference between said first and second levels, said surge reactor means including a first coil connected between a first end of said first voltage clamping means and a first end of said first voltage clamping means and a second end of said second voltage clamping means, said first and second coils being wound on a single ferromagnetic core and having the same magnetic polarity on said core.
Claim 2
Dependent Claim
194 words
A transient voltage surge suppressor comprising: first connection means for connecting said suppressor to AC power lines; second connection means connecting said suppressor to a load receptacle having a plurality of terminals; first voltage clamping means connected across said first connection means to clamp a transient voltage surge appearing on said first connection means to a first level; second voltage clamping means connected across said second connection means to clamp a transient voltage surge appearing thereacross to a second level, said second level being less than said first level and protective of a load connected to said receptacle terminals; and surge reactor means connected between said first and second voltage clamping means to absorb and dissipate a transient voltage surge energy which is a result of the difference between said first and second levels, said surge reactor means including a first coil connected between a first end of said first voltage clamping means and a first end of said first voltage clamping means and a second end of said second voltage clamping means, said first and second coils being wound on a single ferromagnetic core and having the same magnetic polarity on said core.
Claim 3
Dependent Claim
29 words
The suppressor according to claim 1 wherein said first voltage clamping means comprises a metal oxide varistor and said second voltage clamping means comprises a silicon surge suppressor diode.
Claim 4
Dependent Claim
102 words
The suppressor according to claim 1 wherein: said first connection means includes a hot wire, a neutral wire, and an earth ground wire for connecting to a corresponding one of said AC power lines; said second connection means includes a plurality of wires each coresponding to one of said receptacle terminals; said first voltage clamping means includes three metal oxide varistors each connected between a respective pair of said first connection means wires; and said second voltage clamping means includes three sets of silicon surge suppressor diodes connected in a wye configuration between said second connection means wires and a central point.
Claim 5
Dependent Claim
27 words
The suppressor according to claim 3 wherein said central point is electrically floating with respect to said first connection means wires and said second connection means wires.
Claim 6
Dependent Claim
24 words
The suppressor according to claim 3 wherein each set of silicon surge suppressor diodes includes a pair of serially connected silicon surge suppressor diodes.
Claim 7
Dependent Claim
44 words
The suppressor according to claim 3 further including three capacitors each connected across a respective pair of said second connection means wires, said capacitors cooperating with said surge reactor means to provide noise filtering during operation in the absence of a transient voltage surge.
Claim 8
Dependent Claim
36 words
The suppressor according to claim 3 further including a fuse connected in series with the set of silicon surge suppressor diodes connected to the second connection means wire corresponding to said first connection means hot wire.
Claim 9
Dependent Claim
50 words
The suppressor according to claim 7 wherein said fuse has one end connected to said second connection means hot wire, said suppressor further including a neon indicator lamp connected between the other end of said fuse and the second connection means wire corresponding to said first connection means neutral wire.
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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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |