US3922688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip-chart recorder
Assignee: Elsag International BV
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Filing: 1974-07-22
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Granted: 1975-11-25
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Expires: 1994-07-22
Abstract
Abstract This recording apparatus for strip-chart records includes different self-contained chart transport cartridges that interchangeably engage with chart drive, stylus control and indicator tape mechanisms incorporated in a common control assembly. A wide-display recorder cartridge includes a supply roll spindle, a sheath plate, a drive sprocket, and a frictiondriven chart take-up spindle to display an extended portion of the chart record. A Z-fold recorder cartridge includes a chart supply compartment, a drive sprocket, a cylindrical sheath platen, a guide member spring-loaded against the recording chart at its egress from the drive sprocket, and a take-up chamber having a floor which slopes away from the drive sprocket and having a ribbed wall to retain the folds of the recorded chart and to provide for review of intervals of the record.
Inventors
- 👤 David A Bates
- 👤 Gary L Christopher
- 👤 Ii George R Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:12
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/28; G01D15/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
A transport cartridge for containing and horizontally transporting a Z-folded strip-chart maintained in vertical orientation comprising: a supply chamber for containing a Z-folded strip-chart a drive pulley for engaging said strip-chart in upright position from said supply chamber a take-up chamber having a floor which slopes away from said drive pulley at a preselected angle for receiving the stripchart from said drive pulley a chassis vertically supporting said drive pulley, and take-up chamber and means for controllably rotating said drive pulley.
Claim 2
Dependent Claim
81 words
A transport cartridge for containing and horizontally transporting a Z-folded strip-chart maintained in vertical orientation comprising: a supply chamber for containing a Z-folded strip-chart a drive pulley for engaging said strip-chart in upright position from said supply chamber a take-up chamber having a floor which slopes away from said drive pulley at a preselected angle for receiving the stripchart from said drive pulley a chassis vertically supporting said drive pulley, and take-up chamber and means for controllably rotating said drive pulley.
Claim 3
Dependent Claim
20 words
A transport cartridge as in claim 1 further including a sheath member for supporting said strip-chart proximate said drive pulley.
Claim 4
Dependent Claim
30 words
A transport cartridge as in claim 2 wherein said sheath member comprises a vertical plate having a curved portion which at least partially encircles a portion of said drive pulley.
Claim 5
Dependent Claim
39 words
A transport cartridge as in claim 2 further comprising a vertical guide member biased against said strip-chart proximate its egress from said drive pulley for urging the strip-chart into said take-up chamber and into an automatically refolding stack therein.
Claim 6
Dependent Claim
31 words
A transport cartridge as in claim 4 wherein said guide member comprises a vertical plate-like member formed in an S-shaped configuration and is spring-biased against said strip-chart at said drive pulley.
Claim 7
Dependent Claim
35 words
A transport cartridge as in claim 5 wherein said guide member includes one or more nubs or ribs on the inside surface thereof for bearing against said strip-chart and urging it into said take-up chamber.
Claim 8
Dependent Claim
41 words
A transport cartridge as in claim 2 further comprising a vertical post positioned between said supply chamber and said drive pully and a door biased against said post for passing only one opened fold at a time from said supply stack.
Claim 9
Dependent Claim
32 words
A transport cartridge as in claim 7 wherein said door has at least one nub or rib in its inside surface for bearing against the strip-chart passing between it and said post.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |