Patent US4183274A successfully refreshed from Google Patents.
US4183274A
Expired / Lapsed
US
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Roller scriber apparatus for scribing glass
Assignee: Motorola Solutions Inc
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Filing: 1977-12-27
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Granted: 1980-01-15
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Expires: 1997-12-27
Abstract
Abstract Improved apparatus for scribing glass wherein the dimensional interference for entry is controlled, the force applied is nearly constant over a range of glass thicknesses and the scribing wheel is restrained within close tolerances to prevent wheel wobble and/or wander. The invention provides a very high quality fracture of the glass and allows separation to be delayed for at least as much as eleven months after scribing. Scribing may be accomplished in either of two pass directions.
Inventors
- 👤 John T. Kingsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:08
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/10; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0333; Y10T83/0341; Y10T83/0385
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
148 words
Scribing apparatus having a scribing wheel rotatably mounted on an axle and mechanical bias means for applying a force orthogonal to said axle wherein the improvement comprises: L-shaped means having a pivot at the apex thereof, said means comprising a vertically extending arm and a horizontally extending arm; said wheel being attached at the outside of said apex, on the opposite side of said pivot from said horizontally extending arm; said bias means coupled to the end of said vertically extending arm for controlling the force on said wheel and for counteracting the torque of said L-shaped member about said pivot; and means for controlling the maximum dimensional interference between the surface to be scribed and the perimeter of said wheel such that a plane parallel to said axle and tangent to said wheel is parallel to and below the nominal location of the surface to be scribed.
Claim 2
Dependent Claim
148 words
Scribing apparatus having a scribing wheel rotatably mounted on an axle and mechanical bias means for applying a force orthogonal to said axle wherein the improvement comprises: L-shaped means having a pivot at the apex thereof, said means comprising a vertically extending arm and a horizontally extending arm; said wheel being attached at the outside of said apex, on the opposite side of said pivot from said horizontally extending arm; said bias means coupled to the end of said vertically extending arm for controlling the force on said wheel and for counteracting the torque of said L-shaped member about said pivot; and means for controlling the maximum dimensional interference between the surface to be scribed and the perimeter of said wheel such that a plane parallel to said axle and tangent to said wheel is parallel to and below the nominal location of the surface to be scribed.
Claim 3
Dependent Claim
46 words
The scribing apparatus as set forth in claim 1 wherein said improvement further comprises: said mechanical bias means comprises an axially compressed spring characterized by a small differential compression by way of said said vertically extending arm to provide a substantially constant force on said wheel.
Claim 4
Dependent Claim
27 words
The scribing apparatus as set forth in claim 2 wherein said control means comprises a threaded shaft attached to said second arm and engaging said bias means.
Claim 5
Dependent Claim
33 words
The scriber as set forth in claim 13 wherein the distance from said pivot to said bias means is approximately five times the distance from said pivot to the axis of said wheel.
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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |