US3821910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass cutting mechanism
Assignee: South Bend Controls Inc
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Filing: 1972-08-08
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Granted: 1974-07-02
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Expires: 1992-08-08
Abstract
Abstract A mechanism for cutting glass sheet in which a solenoid operates a scoring tool which is urged with a substantially constant force into engagement with the surface of the glass, regardless of variations in glass thickness or irregularities in the surface. The armature in the solenoid is provided with tapered ends which engage end plates having recesses corresponding to the tapered ends of the armature, and a means, preferably a second coil, is used to retract the cutting tool when the first solenoid is deenergized.
Inventors
- 👤 J Tjaden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:35
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/10; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0333; Y10T83/0348; Y10T83/869; Y10T83/8765; Y10T83/8768
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
153 words
A mechanism for cutting glass sheet, comprising a retainer means for holding a glass cutting tool in operative position, a means for reciprocally holding said tool retainer means for movement of the tool to and from engagement with a sheet of glass, an armature for moving said tool retainer toward and away from a sheet of glass, upper and lower end plates between which said armature moves, an electrical coil around said armature for urging said tool into engagement with the surface of the glass sheet, means for adjusting said tool to a position above the surface of the glass where said armature remains in spaced relation to said lower end plate during the operation of the mechanism and applies a substantially constant force regardless of variations in the sheet thickness or irregularities in the glass surface, and a means for retracting said armature, retainer means and tool when said coil is de-energized.
Claim 2
Dependent Claim
153 words
A mechanism for cutting glass sheet, comprising a retainer means for holding a glass cutting tool in operative position, a means for reciprocally holding said tool retainer means for movement of the tool to and from engagement with a sheet of glass, an armature for moving said tool retainer toward and away from a sheet of glass, upper and lower end plates between which said armature moves, an electrical coil around said armature for urging said tool into engagement with the surface of the glass sheet, means for adjusting said tool to a position above the surface of the glass where said armature remains in spaced relation to said lower end plate during the operation of the mechanism and applies a substantially constant force regardless of variations in the sheet thickness or irregularities in the glass surface, and a means for retracting said armature, retainer means and tool when said coil is de-energized.
Claim 3
Dependent Claim
33 words
A mechanism for cutting glass sheet as defined in claim 1 in which said means for retracting said armature consists of a second electrical coil operable when said first electrical coil is de-energized.
Claim 4
Dependent Claim
37 words
A mechanism for cutting glass sheet as defined in claim 1 in which said means for reciprocally holding said tool retainer means includes a cylindrical member and a body having a cylindrical hole therein surrounding said member.
Claim 5
Dependent Claim
29 words
A mechanism for cutting glass sheet as defined in claim 3 in which a housing surrounds said coil and said body is attached to one end of said housing.
Claim 6
Dependent Claim
52 words
A mechanism for cutting glass sheet as defined in claim 1 in which said armature is of a general cylindrical shape and is tapered at each end, and a plate is provided at each end thereof having a recess of substantially the same shape as the adjacent tapered end of the armature.
Claim 7
Dependent Claim
51 words
A mechanism for cutting glass sheet as defined in claim 2 in which said armature is of a general cylindrical shape and is tapered at each end, and a plate is provided at each end having a recess of substantially the same shape as the adjacent tapered end of the armature.
Claim 8
Dependent Claim
51 words
A mechanism for cutting glass sheet as defined in claim 4 in which said armature is of a general cylindrical shape and is tapered at each end, and a plate is provided at each end having a recess of substantially the same shape as the adjacent tapered end of the armature.
Claim 9
Dependent Claim
33 words
A mechanism for cutting glass sheet as defined in claim 7 in which said means for retracting said armature consists of a second electrical coil operable when said first electrical coil is de-energized.
Claim 10
Dependent Claim
34 words
A mechanism for cutting glass sheet as defined in claim 3 in which a stem is connected to the inner end of said cylindrical member, and extends through an axial opening in said armature.
Claim 11
Dependent Claim
35 words
A mechanism for cutting glass sheet as defined in claim 4 in which said housing is of a general cylindrical shape and the means is provided externally thereof for securing said mechanism to a carrier.
Claim 12
Dependent Claim
35 words
A mechanism for cutting glass sheet as defined in claim 10 in which a means is provided for preventing relative rotation of said cylindrical member in said body with respect to said body and housing.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |