US3848337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface indicator
Assignee: Advance Products Corp
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Filing: 1972-12-04
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Granted: 1974-11-19
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Expires: 1992-12-04
Abstract
Abstract A method and apparatus for locating the center of a noncircular, such as a rectangular, face of a workpiece to permit the boring or drilling of an opening in the workpiece at the center of said face. The workpiece is adapted to be mounted in a rotatable chuck and locating blocks are firmly held, as by permanent magnets, against diametrically opposite surfaces of the workpiece adjacent said face. The locating blocks have planar reference surfaces which project beyond the said face of the workpiece. An indicating device is mounted near the said face of the workpiece and has a radially outwardly extending contact point disposed to engage the reference surfaces. The workpiece is rotated by the chuck to enable the contact point to engage the reference surfaces, and the workpiece is radially adjusted by the chuck until the reference surfaces are equidistant from the rotational axis.
Inventors
- 👤 D Kraklau
- 👤 J Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:33
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/22; G01B5/00; G01B5/02; Y; Y10; Y10T; Y10T24/00; Y10T24/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
276 words
A portable and detachable gauging device adapted for attachment to a ferrous workpiece for accurately determining the distance between two substantially parallel surfaces on said workpiece, said device consisting of an article which is free of relatively moving parts, said article including a body having a smooth planar base surface, said body having a substantially cylindrical recess extending therethrough with the longitudinal axis of said recess being substantially perpendicular to said planar base surface, said recess extending from said base surface through said body to the side of said body opposite said base surface, said body being shaped substantially as a rectangular prism and having substantially perpendicular length and width dimensions which are both perpendicular to said axis, said body also having a thickness dimension extending in a direction substantially parallel to said axis, the width and length dimensions each being substantially greater than the thickness dimension, magnet means including a substantially cylindrical magnet snugly disposed within said recess and fixed relative to said body, said magnet being disposed so as to not project outwardly beyond said base surface, said magnet having on one end thereof a substantially smooth planar axial end surface which is disposed parallel and substantially flush with said base surface, and said magnet means including substantially cylindrical gripping means fixedly connected to and coaxially aligned with said magnet and projecting outwardly from the other end thereof, said gripping means projecting outwardly beyond said other side of said body, said cylindrical gripping means having a diameter which is substantially smaller than each of the length and width dimensions of said body, whereby said gripping means facilitates manual gripping and manipulation of said article.
Claim 2
Dependent Claim
276 words
A portable and detachable gauging device adapted for attachment to a ferrous workpiece for accurately determining the distance between two substantially parallel surfaces on said workpiece, said device consisting of an article which is free of relatively moving parts, said article including a body having a smooth planar base surface, said body having a substantially cylindrical recess extending therethrough with the longitudinal axis of said recess being substantially perpendicular to said planar base surface, said recess extending from said base surface through said body to the side of said body opposite said base surface, said body being shaped substantially as a rectangular prism and having substantially perpendicular length and width dimensions which are both perpendicular to said axis, said body also having a thickness dimension extending in a direction substantially parallel to said axis, the width and length dimensions each being substantially greater than the thickness dimension, magnet means including a substantially cylindrical magnet snugly disposed within said recess and fixed relative to said body, said magnet being disposed so as to not project outwardly beyond said base surface, said magnet having on one end thereof a substantially smooth planar axial end surface which is disposed parallel and substantially flush with said base surface, and said magnet means including substantially cylindrical gripping means fixedly connected to and coaxially aligned with said magnet and projecting outwardly from the other end thereof, said gripping means projecting outwardly beyond said other side of said body, said cylindrical gripping means having a diameter which is substantially smaller than each of the length and width dimensions of said body, whereby said gripping means facilitates manual gripping and manipulation of said article.
Claim 3
Dependent Claim
45 words
A device according to claim 1, wherein said other side of said body has a smooth and planar surface portion thereon which is parallel to and spaced a predetermined distance from said base surface, said surface portion being spaceD outwardly from said cylindrical gripping means.
Claim 4
Dependent Claim
208 words
A portable and detachable gauging device adapted for attachment to a ferrous workpiece for accurately determining the distance between two substantially parallel surfaces on said workpiece, said device consisting of an article which is free of relatively moving parts, said article including a rigid body shaped substantially as a rectangular prism and having a smooth and planar substantially rectangular base surface defined by width and length dimensions of said body, said body also having a thickness dimension extending substantially perpendicular to said base surface, said thickness dimension of said body being substantially less than each of said width and length dimensions, said body having a substantially cylindrical recess extending throughout the thickness thereof, the longitudinal axis of said recess extending substantially perpendicular to said base surface, said recess being spaced from the edges of said body, and substantially cylindrical permanent magnet means snugly disposed within said recess and fixedly secured to said body, said magnet means being positioned within said recess so as to not project outwardly beyond said base surface, said magnet means having on one end thereof a smooth and substantially planar axial end surface disposed substantially parallel to said base surface, said cylindrical magnet means extending throughout substantially the complete axial length of said recess.
Claim 5
Dependent Claim
208 words
A portable and detachable gauging device adapted for attachment to a ferrous workpiece for accurately determining the distance between two substantially parallel surfaces on said workpiece, said device consisting of an article which is free of relatively moving parts, said article including a rigid body shaped substantially as a rectangular prism and having a smooth and planar substantially rectangular base surface defined by width and length dimensions of said body, said body also having a thickness dimension extending substantially perpendicular to said base surface, said thickness dimension of said body being substantially less than each of said width and length dimensions, said body having a substantially cylindrical recess extending throughout the thickness thereof, the longitudinal axis of said recess extending substantially perpendicular to said base surface, said recess being spaced from the edges of said body, and substantially cylindrical permanent magnet means snugly disposed within said recess and fixedly secured to said body, said magnet means being positioned within said recess so as to not project outwardly beyond said base surface, said magnet means having on one end thereof a smooth and substantially planar axial end surface disposed substantially parallel to said base surface, said cylindrical magnet means extending throughout substantially the complete axial length of said recess.
Claim 6
Dependent Claim
41 words
A device according to claim 3, wherein said recess is disposed more closely adjacent one edge of said body than the opposite edge thereof, so that the longitudinal axis of said recess is spaced from the centroid of said base surface.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |