US4016784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool setting device
Assignee: Energy Research and Development Administration ERDA
•
Filing: 1976-01-05
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Granted: 1977-04-12
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Expires: 1996-01-05
Abstract
Abstract The present invention relates to a tool setting device for use with numerically controlled machine tools, such as lathes and milling machines. A reference position of the machine tool relative to the workpiece along both the X and Y axes is utilized by the control circuit for driving the tool through its program. This reference position is determined for both axes by displacing a single linear variable displacement transducer (LVDT) with the machine tool through a T-shaped pivotal bar. The use of the T-shaped bar allows the cutting tool to be moved sequentially in the X or Y direction for indicating the actual position of the machine tool relative to the predetermined desired position in the numerical control circuit by using a single LVDT.
Inventors
- 👤 Raymond J. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:11
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/401; G05B19/4015; B; B23; B23B; B23B3/00; B23B3/06; G05B2219/00; G05B2219/30; G05B2219/50; G05B2219/50031; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896; Y10T483/00; Y10T483/13; Y10T483/14; Y10T82/00; Y10T82/14; Y10T82/141; Y10T82/143; Y10T82/25; Y10T82/2502
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
A machine tool setting device for use with a numerically controlled machine utilizing a machine tool in an X-Y axes coordinate system for machining a workpiece, consisting of a single linear variable displacement transducer having a displaceable stylus projecting therefrom, a T-shaped member having an axis of rotation in line with and perpendicular to the plane of displacement of said stylus, said T-shaped member being disposed in a contiguous relationship with said stylus for displacement thereof in response to contact of the T-shaped member with said machine tool during relative movement therebetween in either the X or Y direction, and voltage responsive means coupled to said transducer for indicating the actual position of the machine tool along the axis the relative movement is occurring relative to a predetermined desired tool position along the same axis.
Claim 2
Dependent Claim
135 words
A machine tool setting device for use with a numerically controlled machine utilizing a machine tool in an X-Y axes coordinate system for machining a workpiece, consisting of a single linear variable displacement transducer having a displaceable stylus projecting therefrom, a T-shaped member having an axis of rotation in line with and perpendicular to the plane of displacement of said stylus, said T-shaped member being disposed in a contiguous relationship with said stylus for displacement thereof in response to contact of the T-shaped member with said machine tool during relative movement therebetween in either the X or Y direction, and voltage responsive means coupled to said transducer for indicating the actual position of the machine tool along the axis the relative movement is occurring relative to a predetermined desired tool position along the same axis.
Claim 3
Dependent Claim
61 words
The machine tool setting device claimed in claim 1, wherein the axis of rotation of said T-shaped member is provided by a rod extending through the T-shaped member and attached to the numerically controlled machine, and wherein the contact between said stylus and the T-shaped member is provided by a head carried by said stylus and abuttable against the T-shaped member.
Claim 4
Dependent Claim
54 words
The machine tool setting device claimed in claim 1, wherein the axis of rotation of said T-shaped member is provided by single ball bearings positioned on opposite sides of the T-shaped member in a common plane, bias means are in contact with said ball bearings for maintaining them in position with said T-shaped member.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |