Patent US3774229A successfully refreshed from Google Patents.
US3774229A
Expired / Lapsed
US
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Recorder stylus assembly
Assignee: Revvity Inc
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Filing: 1972-10-19
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Granted: 1973-11-20
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Expires: 1992-10-19
Abstract
Abstract A recorder stylus assembly having a metallic rod, the recording end of which has reduced dimensions, a tip made of a plastic material fixed upon said end of the rod, the tip and rod having planar end faces that are co-planar when first assembled and perpendicular to their respective axes. The tip and rod are made of materials such that during break-in use the tip wears slightly leaving the end face of the rod protruding about one mil beyond the end face of the tip. During subsequent operation wearing at the end faces of the tip and rod is such that the one mil protrusion is maintained.
Inventors
- 👤 W Blackwood
- 👤 K Germeshausen
- 👤 E Worth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:05
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/032
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
In a dielectric paper recorded utilizing one or more moving styluses, a stylus assembly comprising: an electrically conductive rod made of tool steel; a plastic sheath made of a polyimide-polytetrafluoroethylene resin composition snugly fitted around one end of the rod, the rod and sheath having end faces disposed in one plane substantially perpendicular to the axis of the rod, the end face of the rod having a nominal diameter of 8 mils, and the end face of the sheath having a nominal outer diameter of 30 mils.
Claim 2
Dependent Claim
87 words
In a dielectric paper recorded utilizing one or more moving styluses, a stylus assembly comprising: an electrically conductive rod made of tool steel; a plastic sheath made of a polyimide-polytetrafluoroethylene resin composition snugly fitted around one end of the rod, the rod and sheath having end faces disposed in one plane substantially perpendicular to the axis of the rod, the end face of the rod having a nominal diameter of 8 mils, and the end face of the sheath having a nominal outer diameter of 30 mils.
Claim 3
Dependent Claim
135 words
In a dielectric paper recorder utilizing one or more moving styluses, a stylus assembly comprising: an electrically conductive rod made of tool steel having a nominal length of 0.600 inch, a nominal shank diameter of 20 mils, and An end portion having a planar end face and a nominal diameter of 8 mils for a nominal length of 30 mils; and a plastic tip made of a polyimide-polytetrafluoroethylene resin composition having a nominal outer diameter of 50 mils, a nominal length of 0.15 inch, a beveled end with a planar end face having a nominal diameter of 30 mils, and an axial bore there-throgh having dimensions to provide a good fit of the tip around said end portion of said rod, said planar end faces of the rod and tip being disposed in one plane.
Claim 4
Dependent Claim
135 words
In a dielectric paper recorder utilizing one or more moving styluses, a stylus assembly comprising: an electrically conductive rod made of tool steel having a nominal length of 0.600 inch, a nominal shank diameter of 20 mils, and An end portion having a planar end face and a nominal diameter of 8 mils for a nominal length of 30 mils; and a plastic tip made of a polyimide-polytetrafluoroethylene resin composition having a nominal outer diameter of 50 mils, a nominal length of 0.15 inch, a beveled end with a planar end face having a nominal diameter of 30 mils, and an axial bore there-throgh having dimensions to provide a good fit of the tip around said end portion of said rod, said planar end faces of the rod and tip being disposed in one plane.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |