US3990220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming wound music string
Assignee: MODEL BUILDERS Inc
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Filing: 1975-05-27
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Granted: 1976-11-09
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Expires: 1995-05-27
Abstract
Abstract A method of forming a wound musical instrument string wherein a core wire is fed axially along a preselected path while being rotated at high speed and a wrap wire is caused to be wrapped about the advancing rotating core wire. The wrapped core wire may additionally be driven. The drive may comprise rollers engaging the core wire prior to the wrapping operation and may include rollers engaging the wrapped wire subsequent to the wrapping operation.
Inventors
- 👤 William H. Chaffee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:35
CPC Classifications
G; G10; G10D; G10D3/00; G10D3/10; B; B21; B21F; B21F17/00; B21F3/00; B21F3/02; B21F3/04
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
65 words
The method of forming a wound musical instrument string comprising: feedng a discrete length of core wire axially along a preselected path while rotating the entire core wire about the axis thereof; and wrapping a wrap wire helically about said length of advancing rotating core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 2
Independent Claim
65 words
The method of forming a wound musical instrument string comprising: feedng a discrete length of core wire axially along a preselected path while rotating the entire core wire about the axis thereof; and wrapping a wrap wire helically about said length of advancing rotating core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 3
Dependent Claim
22 words
The method of forming a wound musical instrument string of claim 1 wherein the wrapped wire is driven along said preselected path.
Claim 4
Dependent Claim
31 words
The method of forming a wound musical instrument string of claim 1 wherein said wrap wire is fed transaxially against said rotating and advancing core wire to effect said helical wrapping.
Claim 5
Independent Claim
66 words
The method of forming a wound musical instrument string comprising: feeding a core wire axially along a preselected path while rotating the core wire about the axis thereof at a speed of over 1000 rpm; and wrapping a wrap wire helically about the advancing rotating core wire at a preselcted rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 6
Independent Claim
66 words
The method of forming a wound musical instrument string comprising: feeding a core wire axially along a preselected path while rotating the core wire about the axis thereof at a speed of over 1000 rpm; and wrapping a wrap wire helically about the advancing rotating core wire at a preselcted rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 7
Dependent Claim
25 words
The method of forming a wound musical instrument string of claim 4 wherein said core wire is rotated at a speed of over 50,000 rpm.
Claim 8
Independent Claim
62 words
The method of forming a wound musical instrument string comprising: feeding a preselected length of core wire axially along a preselected path while rotating the core wire about the axis thereof; and wrapping a wrap wire helically about the advancing rotating core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 9
Independent Claim
62 words
The method of forming a wound musical instrument string comprising: feeding a preselected length of core wire axially along a preselected path while rotating the core wire about the axis thereof; and wrapping a wrap wire helically about the advancing rotating core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 10
Dependent Claim
22 words
The method of forming a wound musical instrument string of claim 1 including the step of rotatively driving the wrapped core wire.
Claim 11
Dependent Claim
67 words
Apparatus for forming a wound musical instrument string comprising: means for feeding a discrete length of core wire axially along a preselected path while rotating the entire core wire about the axis thereof; and means for wrapping a wrap wire helically about said length of advancing core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 12
Dependent Claim
67 words
Apparatus for forming a wound musical instrument string comprising: means for feeding a discrete length of core wire axially along a preselected path while rotating the entire core wire about the axis thereof; and means for wrapping a wrap wire helically about said length of advancing core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 13
Dependent Claim
15 words
The string forming apparatus of claim 8 including means for rotatively driving the wrapped wire.
Claim 14
Dependent Claim
90 words
Apparatus for forming a wound musical instrument string comprising: means for feeding a core wire axially along a preselected path while rotating the core wire about the axis thereof including a plurality of rotary drive elements peripherally engaging said core wire and means for rotating the drive elements about axes skewed to the axis of the core wire; and means for wrapping a wrap wire helically about the advancing core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 15
Dependent Claim
90 words
Apparatus for forming a wound musical instrument string comprising: means for feeding a core wire axially along a preselected path while rotating the core wire about the axis thereof including a plurality of rotary drive elements peripherally engaging said core wire and means for rotating the drive elements about axes skewed to the axis of the core wire; and means for wrapping a wrap wire helically about the advancing core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string.
Claim 16
Dependent Claim
22 words
The string forming apparatus of claim 10 wherein said drive elements comprise rollers engaging said core wire at diametrically opposite portions thereof.
Claim 17
Dependent Claim
97 words
Apparatus for forming a wound musical instrument string comprising: means for feeding a core wire axially along a preselected path while rotating the core wire about the axis thereof; means for wrapping a wrap wire helically about the advancing core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string; and means for rotatively driving the wrapped wire comprising a plurality of rotary drive elements peripherally engaging said wrapped wire and means for rotating the drive elements about axes skewed to the axis of the core wire.
Claim 18
Dependent Claim
97 words
Apparatus for forming a wound musical instrument string comprising: means for feeding a core wire axially along a preselected path while rotating the core wire about the axis thereof; means for wrapping a wrap wire helically about the advancing core wire at a preselected rate coordinated with the axial feed of the core wire to define a composite wound string; and means for rotatively driving the wrapped wire comprising a plurality of rotary drive elements peripherally engaging said wrapped wire and means for rotating the drive elements about axes skewed to the axis of the core wire.
Claim 19
Dependent Claim
20 words
The string forming apparatus of claim 8 including a tubular guide for carrying said core wire to said feeding means.
Claim 20
Dependent Claim
20 words
The string forming apparatus of claim 8 including a tubular guide for carrying said wound string from said wrapping means.
Claim 21
Dependent Claim
28 words
The string forming apparatus of claim 8 including means for rotatively driving the wrapped wire and a tubular guide for carrying said wound string from said wrapping means.
Claim 22
Dependent Claim
26 words
The string forming apparatus of claim 8 wherein said core wire has a diameter of less than approximately one-third the diameter of the composite wound string.
Claim 23
Dependent Claim
25 words
The string forming apparatus of claim 8 wherein said wrapping means is arranged to cause the turns of said helically wrapped wrap wire to abut.
Claim 24
Dependent Claim
23 words
The string forming apparatus of claim 8 wherein said wrapping means is arranged to wrap the wrap wire tightly about said core wire.
Claim 25
Dependent Claim
29 words
The string forming apparatus of claim 10 wherein said axes are skewed to the axis of the core wire at the helix angle of said helically wrapped wrap wire.
Claim 26
Dependent Claim
29 words
The string forming apparatus of claim 12 wherein said axes are skewed to the axis of the core wire at the helix angle of said helically wrapped wrap wire.
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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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |