Patent US3591303A successfully refreshed from Google Patents.
US3591303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for positioning piano hammers for drilling
Assignee: Individual
•
Filing: 1969-04-02
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Granted: 1971-07-06
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Expires: 1989-04-02
Abstract
Abstract A viselike clamp is adapted to grip the head of a piano hammer and is provided with supporting means so that the hammerhead may be arranged at any desired angle with respect to a stationary drill-supporting means so that the head may be drilled to provide an opening to receive the end of the stem which supports the piano hammer.
Inventors
- 👤 Fred T Conway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:48
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B25H1/0042; B23; B23B; B23B47/00; B23B47/28; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/563; Y10T408/5635; Y10T408/567
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
Apparatus for use in drilling articles such as piano hammers, comprising a normally stationary vertical drill guide, means for clamping the article to be drilled beneath said guide, means for supporting said clamping means for adjusting the pitch of the article in order to drill an angular opening in the article, and second means mounted against said clamping means for supporting the bottom of the article and for adjusting the roll of the article in order to drill an angular opening in the article which is not parallel with any of the three dimensional planes of the article.
Claim 2
Dependent Claim
98 words
Apparatus for use in drilling articles such as piano hammers, comprising a normally stationary vertical drill guide, means for clamping the article to be drilled beneath said guide, means for supporting said clamping means for adjusting the pitch of the article in order to drill an angular opening in the article, and second means mounted against said clamping means for supporting the bottom of the article and for adjusting the roll of the article in order to drill an angular opening in the article which is not parallel with any of the three dimensional planes of the article.
Claim 3
Dependent Claim
89 words
Apparatus according to claim 1 wherein said clamping means comprises a pair of jaws relatively movable toward and away from each other and said second means includes a fastener and a faceplate secured by said fastener against the inner face of each said jaw, each faceplate having a horizontal ledge formed by a reduced top portion to support the article to be drilled while the pitch of the article is adjusted by appropriate rotation of each said faceplate on each said jaw about the axis of each said fastener.
Claim 4
Dependent Claim
105 words
Apparatus according to claim 2 including horizontally slidable means, a vertical shaft, a plurality of collars vertically slidable and rotatable about the longitudinal axis of said shaft, and rods slidable mounted within said collars transverse with said vertical shaft, said vertical shaft and said means for supporting said clamping means secured to the top of said slidable means allowing said rods to make physical contact with the surface of the article at a plurality of locations to facilitate the positioning of the roll and pitch of another article to be identically drilled regardless of any sliding of said clamping means relative to said drill guide.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |