US4318149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
RC Composite component with spark gap
Assignee: Murata Manufacturing Co Ltd
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Filing: 1980-07-03
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Granted: 1982-03-02
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Expires: 2000-07-03
Abstract
Abstract An RC composite component with a spark gap comprises a pair of discharge electrodes defining the predetermined spark gap and formed on a dielectric substrate. The discharge electrodes are coated with a film of varnish with a controlled thickness by the screen process.
Inventors
- 👤 Tetsuya Murakawa
- 👤 Toshimi Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:45
CPC Classifications
H; H01; H01T; H01T4/00; H01T4/08
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
72 words
An RC composite component with a spark gap having a capacitor and a resistor, comprising: a dielectric substrate, a pair of discharge electrodes formed on said dielectric substrate to define said spark gap therebetween, which has a predetermined spacing, and film forming means including a varnish for adjusting the flashover voltage to a predetermined range, said means being formed on said dielectric substrate to cover a particular region including said discharge electrodes.
Claim 2
Dependent Claim
72 words
An RC composite component with a spark gap having a capacitor and a resistor, comprising: a dielectric substrate, a pair of discharge electrodes formed on said dielectric substrate to define said spark gap therebetween, which has a predetermined spacing, and film forming means including a varnish for adjusting the flashover voltage to a predetermined range, said means being formed on said dielectric substrate to cover a particular region including said discharge electrodes.
Claim 3
Dependent Claim
30 words
An RC composite component with a spark gap as set forth in claim 1, wherein said film forming means is a single film which commonly covers said two discharge electrodes.
Claim 4
Dependent Claim
30 words
An RC composite component with a spark gap as set forth in claim 1, wherein said film forming means is two separate films which individually cover said respective discharge electrodes.
Claim 5
Dependent Claim
34 words
An RC composite component with a spark gap as set forth in claim 1, wherein said film forming means has a controlled film thickness to thereby adjust the flashover voltage to a predetermined range.
Claim 6
Dependent Claim
30 words
An RC composite component with a spark gap as set forth in claim 4, wherein said film forming means having said controlled film thickness is formed by the screen process.
Claim 7
Dependent Claim
28 words
An RC composite component with a spark gap as set forth in claim 4, wherein said film forming means having said controlled film thickness is formed by spraying.
Claim 8
Dependent Claim
28 words
An RC composite component with a spark gap as set forth in claim 4, wherein said film forming means having said controlled film thickness is formed by brushing.
Claim 9
Dependent Claim
54 words
An RC composite component with a spark gap as set forth in claim 4, wherein said predetermined range of flashover voltage is selected such that no discharge will occur at 3.5 kV AC or below but that satisfactory discharge will occur as determined by a 5.0 kV discharge test according to the UL standards.
Claim 10
Dependent Claim
27 words
An RC composite component wih a spark gap as set forth in claim 4, wherein said controlled film thickness is from several microns to hundreds of microns.
Claim 11
Dependent Claim
21 words
An RC composite component with a spark gap as set forth in claim 1, wherein said varnishes include a thermosetting resin.
Claim 12
Dependent Claim
22 words
An RC composite component with a spark gap as set forth in claim 10, wherein said thermosetting resin is a phenol resin.
Claim 13
Dependent Claim
22 words
An RC composite component with a spark gap as set forth in claim 10, wherein said thermosetting resin is a silicone resin.
Claim 14
Dependent Claim
22 words
An RC composite component with a spark gap as set forth in claim 10, wherein said thermosetting resin is an epoxy resin.
Claim 15
Dependent Claim
20 words
An RC composite component with a spark gap as set forth in claim 1, said varnishes include a thermoplastic resin.
Claim 16
Dependent Claim
21 words
An RC composite component with a spark gap as set forth in claim 14, wherein said thermoplastic resin is polyvinyl chloride.
Claim 17
Dependent Claim
20 words
An RC composite component with a spark gap as set forth in claim 14, wherein said thermoplastic resin is polyethylene.
Claim 18
Dependent Claim
46 words
An RC composite component with a spark gap as set forth in claim 1, wherein said capacitor comprises at least a pair of opposed capacitor electrodes which form an electrostatic capacity therebetween, said capacitor electrodes being respectively formed on the opposite surfaces of said dielectric substrate.
Claim 19
Dependent Claim
64 words
An RC composite component with a spark gap as set forth in claim 17, wherein said capacitor forms two series-connected electrostatic capacities, said capacitor electrodes include first and second electrodes separately formed on one surface of said dielectric substrate and a third electrode formed on the other surface of said dielectric substrate so that it is opposed commonly to said first and second electrodes.
Claim 20
Dependent Claim
74 words
An RC composite component with a spark gap as set forth in claim 18, wherein said pair of electrodes are formed such that they integrally extend respectively from said first and second electrodes, and wherein one integral electrode composed of said first electrode and one discharge electrode and the other electrode composed of said second electrode and the other discharge electrode have portions closest to each other defined by their respective discharge electrode portions.
Claim 21
Dependent Claim
43 words
An RC composite component with a spark gap as set forth in claim 19, which further comprises a coating resin having insulating qualities and covering said dielectric substrate in such a manner as to leave at least said pair of discharge electrodes exposed.
Claim 22
Dependent Claim
51 words
An RC composite component with a spark gap as set forth in claim 19, which further comprises a pair of lead wires electrically connected respectively to said first and second electrodes and led out over a distance greater than the distance between said pair of discharge electrodes to constitute external terminals.
Claim 23
Dependent Claim
34 words
An RC composite component with a spark gap as set forth in claim 18, wherein said resistor is a film resistor formed on said dielectric substrate to extend between said first and second electrodes.
Claim 24
Dependent Claim
20 words
An RC composite component with a spark gap as set forth in claim 22, wherein said film resistor extends zigzag.
Claim 25
Dependent Claim
23 words
An RC composite component with a spark gap as set forth in claim 1, wherein said spark gap is 6 mm or less.
Claim 26
Dependent Claim
23 words
An RC composite component with a spark gap as set forth in claim 1, wherein said spark gap is 4 mm or less.
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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |