Back to results
US 4,234,886 AGranted
Electric graphic recorder
AssigneeAlden Research Foundation
InventorsJohn M. Alden, George C. Williams
Life of this patent
Estimating the term…
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.
Claims7
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.
4 more elements
Dependencies are inferred from the claim text.