Patent US3623121A successfully refreshed from Google Patents.
US3623121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic recorder
Assignee: AMF GEO SPACE Corp A CORP OF TEXAS
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Filing: 1969-05-28
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Granted: 1971-11-23
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Expires: 1989-05-28
Abstract
Abstract A recording seismograph is provided which employs an electrophotographic recording process to provide a dry record or seismogram. The seismograph includes a multielement galvanometer, a light source, timing light signals and optical means for impinging the light traces on a chemically treated paper which has been properly charged prior to being exposed to the light traces. The exposed paper is then passed through a developer tank in which the paper is sprayed with a toner on the sensitized side of the paper only. Control of the toner spray achieves controlled development of the image. The paper storage and loading mechanism is mounted on the front door which allows easy loading of the recorder.
Inventors
- 👤 Gene Corgey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:39
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/326; G01; G01D; G01D15/00; G01D15/14; G01V; G01V1/00; G01V1/24; G01V1/242; G03G15/04; G03G15/04036; G03G15/04045
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
171 words
A seismic recorder for recording seismic signals including: a housing; an optical system including a galvanometer block to transmit optical signals to a recording window; a door supported by and being displaceable from said housing; a record medium; storage means including a supply spool rotatably mounted on said door for storing said record medium; record medium drive means mounted in said housing and on said door, said drive means being operatively coupled to said supply spool for advancing said record medium through said recording window, said drive means including a plurality of adjacently disposed rollers in said housing and on said door, whereby when a leader portion of said record medium is initially pulled out of said spool with said door in its open position, said record medium becomes automatically engaged by said drive means upon closing of said door, and said drive means further including a subassembly of rollers, said subassembly being pivotally mounted on said door and being normally biased in a raised position when said door is open.
Claim 2
Dependent Claim
171 words
A seismic recorder for recording seismic signals including: a housing; an optical system including a galvanometer block to transmit optical signals to a recording window; a door supported by and being displaceable from said housing; a record medium; storage means including a supply spool rotatably mounted on said door for storing said record medium; record medium drive means mounted in said housing and on said door, said drive means being operatively coupled to said supply spool for advancing said record medium through said recording window, said drive means including a plurality of adjacently disposed rollers in said housing and on said door, whereby when a leader portion of said record medium is initially pulled out of said spool with said door in its open position, said record medium becomes automatically engaged by said drive means upon closing of said door, and said drive means further including a subassembly of rollers, said subassembly being pivotally mounted on said door and being normally biased in a raised position when said door is open.
Claim 3
Dependent Claim
43 words
The recorder of claim 1 wherein said housing includes: a toner enclosure, liquid toner spray means in said enclosure, and means pivoting said subassembly into said enclosure when said door is being closed, thereby causing said record medium to traverse through said enclosure.
Claim 4
Dependent Claim
31 words
The recorder of claim 2 wherein said toner spray means includes: an elongated member having a plurality of apertures for spraying said record medium when it traverses through said toner enclosure.
Claim 5
Dependent Claim
51 words
The recorder of claim 3 wherein: said elongated member is a tube and said apertures extend through the wall and along the length of said tube, and further including: at least one collar mounted on said tube for closing one or more apertures depending on the width of said record medium.
Claim 6
Dependent Claim
49 words
The recorder of claim 4 and further including: an electric charger assembly composed of two sections, one of said sections being mounted in said housing, and the other section being mounted on said door whereby when said door is closed said record medium becomes sandwiched between said two sections.
Claim 7
Dependent Claim
25 words
The recorder of claim 1 wherein: said storage means includes at least two guide rails, and means on said rails for accepting differenT length spools.
Claim 8
Dependent Claim
27 words
The recorder of claim 3 and further including: a toner reservoir for storing liquid toner, and an electrically operated pump for filling said reservoir with said toner.
Claim 9
Dependent Claim
35 words
The recorder of claim 7 and further including: an electrically operated circulating pump for supplying liquid toner under pressure from said reservoir to said spray means and to one face of said record medium only.
Claim 10
Dependent Claim
22 words
The recorder of claim 8 wherein, said subassembly includes a wiping roller for removing the excess liquid toner from said record medium.
Claim 11
Dependent Claim
21 words
The recorder of claim 4 wherein, said spray means spray said liquid toner onto one side of said record medium only.
Claim 12
Dependent Claim
14 words
The recorder of claim 10 wherein said record medium is a chemically treated paper.
Claim 13
Dependent Claim
38 words
The recorder of claim 1 wherein said drive means further include: a main drive roller rotatably mounted on a main drive shaft for advancing said record medium, and an electrically operated motor for rotating said main drive shaft.
Claim 14
Dependent Claim
50 words
The recorder of claim 1 wherein said subassembly further includes: an auxiliary drive roller, an elastic band for driving said auxiliary drive roller from said drive means, and rotatably mounted engaging means for engaging said band thereby driving said auxiliary roller only when said door is in its closed position.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |