Patent US4742750A successfully refreshed from Google Patents.
US4742750A
Expired / Lapsed
US
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Adjustable fine tuning bridge system and tremolo for stringed musical instruments
Assignee: Individual
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Filing: 1986-07-01
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Granted: 1988-05-10
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Expires: 2006-07-01
Abstract
Abstract An improved fulcrum tremolo is disclosed, characterized by a unique mounting system and a novel adjustable bridge and fine turning assembly. A pair of screws having a blade-like heads are connected with the body of a musical instrument. The tremolo is arranged in a recess in the body of the instrument and includes in its forward edge tapered recesses to receive the screw head edges for pivotal movement thereabout. An adjustable bridge and fine turning assembly for the instrument strings is connected with the tremolo. For each string there is provided a body portion having a pair of rollers for supporting the string, and a tubular member for receiving the string. The tubular member is arranged in a recess within the tremolo. Harmonic tuning is adjusted by sliding the body portion and tube within its recess longitudinally, essentially without altering the tuning of the string. A string securing member is connected with the tremolo to vary the tension of each string. Each string securing member includes a thumbscrew for rotating the member relative to the tremolo to individually adjust the tension of each string, the thumbscrews being vertically offset to provide a low profile tremolo.
Inventors
- 👤 David C. Storey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:37
CPC Classifications
G; G10; G10D; G10D3/00; G10D3/14; G10D3/147; G10D3/153
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
149 words
Apparatus for producing a vibrato effect in the strings of a musical instrument, comprising (a) a tremolo including horizontal and vertical portions, said tremolo vertical portion being arranged in a recess contained in the body portion of the instrument and said tremolo horizontal portion being arranged adjacent the upper surface of the instrument body portion, one edge of said tremolo horizontal portion containing at least one recess; and (b) means pivotally connecting said tremolo with the instrument body portion, said connecting means comprising screw means threadably connected with the instrument body portion, said screw means including a head portion having a sharp circumferential edge, said tremolo recess receiving a portion of said sharp edge and pivoting thereabout, whereby when the instrument strings are connected with said tremolo and when said tremolo is pivoted about said sharp edge, the tension of the strings is varied to produce a vibrato effect.
Claim 2
Dependent Claim
149 words
Apparatus for producing a vibrato effect in the strings of a musical instrument, comprising (a) a tremolo including horizontal and vertical portions, said tremolo vertical portion being arranged in a recess contained in the body portion of the instrument and said tremolo horizontal portion being arranged adjacent the upper surface of the instrument body portion, one edge of said tremolo horizontal portion containing at least one recess; and (b) means pivotally connecting said tremolo with the instrument body portion, said connecting means comprising screw means threadably connected with the instrument body portion, said screw means including a head portion having a sharp circumferential edge, said tremolo recess receiving a portion of said sharp edge and pivoting thereabout, whereby when the instrument strings are connected with said tremolo and when said tremolo is pivoted about said sharp edge, the tension of the strings is varied to produce a vibrato effect.
Claim 3
Dependent Claim
13 words
Apparatus as defined in claim 1, wherein said tremolo comprises a fulcrum tremolo.
Claim 4
Dependent Claim
44 words
Apparatus as defined in claim 2, wherein the instrument strings bias said tremolo in one direction about said sharp edge, and further comprising spring means connected between the instrument body portion and said tremolo vertical portion for biasing said tremolo in the opposite direction.
Claim 5
Dependent Claim
30 words
Apparatus as defined in claim 3, and further comprising a tremolo arm rotatably connected with said tremolo for pivoting said tremolo about said sharp edge to produce the vibrato effect.
Claim 6
Dependent Claim
23 words
Apparatus as defined in claim 4, and further comprising means for adjusting the rotational play of said tremolo arm relative to said tremolo.
Claim 7
Dependent Claim
112 words
An adjustable bridge system for the strings of a musical instrument, comprising (a) a base; (b) individually adjustable bridge means connected with said base for supporting the individual instrument strings, respectively, each of said bridge means including (1) a body portion; (2) means for adjusting the vertical and longitudinal displacement of said body portion relative to said base; (3) a first roller rotatably connected with said body portion for supporting an individual string; (4) a second roller rotatably connected with said body portion on the opposite side of the string from said first roller; and (5) a hollow threaded tube connected at one end with said body portion for receiving the string.
Claim 8
Dependent Claim
112 words
An adjustable bridge system for the strings of a musical instrument, comprising (a) a base; (b) individually adjustable bridge means connected with said base for supporting the individual instrument strings, respectively, each of said bridge means including (1) a body portion; (2) means for adjusting the vertical and longitudinal displacement of said body portion relative to said base; (3) a first roller rotatably connected with said body portion for supporting an individual string; (4) a second roller rotatably connected with said body portion on the opposite side of the string from said first roller; and (5) a hollow threaded tube connected at one end with said body portion for receiving the string.
Claim 9
Dependent Claim
26 words
Apparatus as defined in claim 6, and further comprising means for clamping said body portions in a predetermined longitudinal and vertical position relative to said base.
Claim 10
Dependent Claim
28 words
Apparatus as defined in claim 7, wherein each of said body portions include means for adjusting the lateral position of said first roller relative to said body portion.
Claim 11
Dependent Claim
138 words
An adjustable bridge system for the strings of a musical instrument, comprising (a) a base; (b) individually adjustable bridge means connected with said base for supporting the individual instrument strings, respectively, each of said bridge means including (1) a body portion; (2) means for adjusting the vertical displacement of said body portion relative to said base; (3) a first roller connected with said body portion for supporting an individual string; (4) means for adjusting the lateral position of said first roller relative to said body portion; (5) means for adjusting the rotational play of said first roller relative to said base; (6) a second roller connected with said body portion on the opposite side of the string from said first roller; and (7) a hollow tube connected at one end with said body portion for receiving the string.
Claim 12
Dependent Claim
138 words
An adjustable bridge system for the strings of a musical instrument, comprising (a) a base; (b) individually adjustable bridge means connected with said base for supporting the individual instrument strings, respectively, each of said bridge means including (1) a body portion; (2) means for adjusting the vertical displacement of said body portion relative to said base; (3) a first roller connected with said body portion for supporting an individual string; (4) means for adjusting the lateral position of said first roller relative to said body portion; (5) means for adjusting the rotational play of said first roller relative to said base; (6) a second roller connected with said body portion on the opposite side of the string from said first roller; and (7) a hollow tube connected at one end with said body portion for receiving the string.
Claim 13
Dependent Claim
26 words
Apparatus as defined in claim 9, and further comprising means for clamping said body portions in a predetermined longitudinal and vertical position relative to said base.
Claim 14
Dependent Claim
73 words
Apparatus as defined in claim 10, wherein said base contains a plurality of slots and said clamping means comprise a plurality of bolts threadably connected with said body portions, respectively, each of said bolts passing through one of said slots, whereby when each body portion is adjusted to a desired longitudinal and vertical position, said bolts are tightened against the edges defining said slots to fix said body portions in the desired position.
Claim 15
Dependent Claim
12 words
Apparatus as defined in claim 11, wherein said base comprises a tremolo.
Claim 16
Dependent Claim
20 words
Apparatus as defined in claim 12, and further comprising means for rotatably connecting said tremolo with the musical instrument body.
Claim 17
Dependent Claim
24 words
Apparatus as defined in claim 13, wherein said tremolo comprises a fulcrum tremolo containing at least one tapered recess in the forward edge thereof.
Claim 18
Dependent Claim
46 words
Apparatus as defined in claim 14, wherein said connecting means comprises screw means threadably connected with the musical instrument body, said screw means each having a head portion having a sharp circumferential edge, said tremolo recesses receiving a portion of said screw heads and pivoting thereabout.
Claim 19
Dependent Claim
43 words
Apparatus as defined in claim 15, wherein the instrument strings bias said tremolo in one direction of rotation about said screw heads, and further comprising spring means connected between the instrument body and said tremolo for biasing said tremolo in the opposite direction.
Claim 20
Dependent Claim
30 words
Apparatus as defined in claim 16, and further comprising a tremolo arm rotatably connected with said tremolo for pivoting said tremolo about said screw head to produce a vibrato effect.
Claim 21
Dependent Claim
23 words
Apparatus as defined in claim 17, and further comprising means for adjusting the rotational play of said tremolo arm relative to said tremolo.
Claim 22
Dependent Claim
70 words
Apparatus as defined in claim 18, and further comprising string retaining means rotatably connected with said tremolo horizontal portion, said string retaining means containing a through-bore for receiving one end of the string and including a thumbscrew threadably connected with said string retaining means in offset relation with said through-bore for rotating said string retaining means relative to said tremolo horizontal portion, thereby to vary the tension of the string.
Claim 23
Dependent Claim
80 words
Apparatus as defined in claim 10, wherein said longitudinal adjustment means is arranged on said tube intermediate the ends thereof for longitudinally adjustably connecting said body portion with said base, and further comprising string securing means threadably connected with the other end of said tube for holding the end of the string, said string securing means being displaceable along said threaded tube upon rotation thereof relative to said tube to vary the tension of and to fine tune the string.
Claim 24
Dependent Claim
15 words
Apparatus as defined in claim 20, wherein said longitudinal adjustment means comprises a threaded collet.
Claim 25
Dependent Claim
45 words
Apparatus as defined in claim 21, wherein said base contains a plurality of recesses for receiving said collets, whereby upon rotation of said collets, said collets are retained in said recesses and said threaded tubes and body portions are longitudinally displaced relative to said base.
References Cited (Backward Citations)
US319188A
Cited
US3241418A
Cited
US4171661A
Cited
US4361068A
Cited
US4430919A
Cited
US4541320A
Cited
US4608905A
Cited
US4649789A
Cited
US4656915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |