US4234886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric graphic recorder
Assignee: Alden Electronics Inc
•
Filing: 1979-01-22
•
Granted: 1980-11-18
•
Expires: 1999-01-22
Abstract
Abstract A graphic recorder including a viewable well for holding a recording web in a moist condition. The recorder includes a demountable, transparent well cover and a transparent top. Walls are arranged on the sides of the top and they carry a linear electrode and a roller and simultaneously urge the well cover towards the well to seal the compartment and prevent the escape of moisture.
Inventors
- 👤 John M. Alden
- 👤 George C. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:42
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/06; G01D15/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A graphic recorder of electrical signals on a moist recording web drawn on a path from a roll to between a scanning electrode and a linear electrode; said recorder comprising: a frame and a well disposed upon said frame for holding said moist recording web; a cover demountably disposed over said well and arranged to form a humidor and retain moisture in the roll; means for holding the roll of recording web in said well, said means being arranged so that the axis of the roll is aligned parallel to the linear electrode; a mouth formed between said well and said well cover for the emergence of moist web and means on said mouth for retaining moisture within said well; and a recorder cover hinged to the frame, and means on the recorder cover positioned to engage the well cover to urge the well cover to a position sealing the humidor well.
Claim 2
Dependent Claim
152 words
A graphic recorder of electrical signals on a moist recording web drawn on a path from a roll to between a scanning electrode and a linear electrode; said recorder comprising: a frame and a well disposed upon said frame for holding said moist recording web; a cover demountably disposed over said well and arranged to form a humidor and retain moisture in the roll; means for holding the roll of recording web in said well, said means being arranged so that the axis of the roll is aligned parallel to the linear electrode; a mouth formed between said well and said well cover for the emergence of moist web and means on said mouth for retaining moisture within said well; and a recorder cover hinged to the frame, and means on the recorder cover positioned to engage the well cover to urge the well cover to a position sealing the humidor well.
Claim 3
Dependent Claim
42 words
The recorder according to claim 1 wherein the means on the mouth for retaining moisture includes a pair of opposed polymeric strips that extend respectively from said well cover and from said well and are arranged to slidably engage said recording web.
Claim 4
Dependent Claim
23 words
The recorder according to claim 1 further including a recorder cover disposed upon said frame, said recorder cover including a top and sidewalls.
Claim 5
Dependent Claim
45 words
The recorder according to claim 1 further including said linear electrode and a roller being supported between said sidewalls, whereby when said recorder cover is raised, said linear electrode and said roller is raised and said well cover is released from engagement with said sidewalls.
Claim 6
Dependent Claim
37 words
The recorder according to claim 4 wherein said well and said well cover are each semi-cylindrical and said sidewalls have recesses disposed therein adapted to receive the well cover and urge said well cover towards said well.
Claim 7
Dependent Claim
16 words
The recorder according to claim 1 wherein the recorder cover and the well cover are transparent.
Claim 8
Dependent Claim
35 words
The recorder according to claim 4 wherein strips of moisture sealing material are disposed on the rear of the well cover and between the sidewalls and the well cover to retain moisture within the well.
References Cited (Backward Citations)
US2776183A
Cited
US2825622A
Cited
US3611424A
Cited
US3638237A
Cited
US3761952A
Cited
US4119975A
Cited
US4135199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |