Patent US3581130A successfully refreshed from Google Patents.
US3581130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterbalanced resiliently supported tuning fork
Assignee: PHILAMON Inc
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Filing: 1969-11-24
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Granted: 1971-05-25
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Expires: 1989-11-24
Abstract
Abstract There is disclosed a tuning fork resonator with electrical drive and pickup coils and a tuning fork having a pair of tines, a common tine-junction section, a supporting portion for securing the fork in place and a pliant section between the common tinejunction portion and the supporting portion of the fork. The fork is provided with a counterbalance which is oppositely disposed from the tines of the fork with respect to the pliant section. The counterbalance counteracts the tendency of the tine ends to rotate in response to lateral acceleration force due to compliance of the pliant section and in some cases also counteracts the response to lateral acceleration force due to bending of the tines themselves. A version is disclosed in which there are two forks laterally spaced with the tine ends physically bridged together by shutters to form an elongated undulating aperture and with the counterbalance and common tinejunction portions of the two forks consisting of a common bridging structure which is relatively rigid so that the two pairs of tines of the respective fork sections are substantially in unison both as to tine vibrations and as to reaction to acceleration forces.
Inventors
- 👤 Boris F Grib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:20
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/02; H02K33/10; G; G04; G04C; G04C3/00; G04C3/08; G04C3/10; G04C3/101; G04C3/102; H03; H03H; H03H9/00; H03H9/46; H03H9/48
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
128 words
A fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, a pliant coupling section connecting said common tinejunction portion with said mounting portion so that said common tine-junction portion is vibratable in a reed-mode about a predetermined reed-mode axis, the center of gravity of the combination of said tines and said common tine-junction portion being substantially as far from the ends of said tines along the longitudinal dimension of saId fork as said reed-mode axis, said pliant coupling section being located to place said reed-mode axis at least one quarter of a tine length away from the center of gravity of said pair of tines measured in the direction of the longitudinal axis of said fork.
Claim 2
Dependent Claim
128 words
A fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, a pliant coupling section connecting said common tinejunction portion with said mounting portion so that said common tine-junction portion is vibratable in a reed-mode about a predetermined reed-mode axis, the center of gravity of the combination of said tines and said common tine-junction portion being substantially as far from the ends of said tines along the longitudinal dimension of saId fork as said reed-mode axis, said pliant coupling section being located to place said reed-mode axis at least one quarter of a tine length away from the center of gravity of said pair of tines measured in the direction of the longitudinal axis of said fork.
Claim 3
Dependent Claim
109 words
In a fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, and a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is vibratable in a reed-mode about a predetermined reed-mode axis; the improvement comprising a counterweight portion rigidly secured relative to said common tine-junction portion and causing the center of gravity of the combination of said tines, said common tine-junction portion and said counterweight portion to be displaced in the direction opposite to the ends of said tines at least as far as said pliant coupling section.
Claim 4
Dependent Claim
109 words
In a fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, and a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is vibratable in a reed-mode about a predetermined reed-mode axis; the improvement comprising a counterweight portion rigidly secured relative to said common tine-junction portion and causing the center of gravity of the combination of said tines, said common tine-junction portion and said counterweight portion to be displaced in the direction opposite to the ends of said tines at least as far as said pliant coupling section.
Claim 5
Dependent Claim
121 words
A fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is vibratable in a reed-mode about a predetermined reed-mode axis, said common tine junction portion having a rigid extension extending away from said reed-mode axis in a direction opposite said tines having a mass and position such that the center of gravity of the combination of said tines, said common tine-junction portion and said extension is located substantially at least as far from the ends of said tines along the longitudinal dimension of said fork as said pliant coupling section.
Claim 6
Dependent Claim
121 words
A fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is vibratable in a reed-mode about a predetermined reed-mode axis, said common tine junction portion having a rigid extension extending away from said reed-mode axis in a direction opposite said tines having a mass and position such that the center of gravity of the combination of said tines, said common tine-junction portion and said extension is located substantially at least as far from the ends of said tines along the longitudinal dimension of said fork as said pliant coupling section.
Claim 7
Dependent Claim
120 words
In a tuning fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, and a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is resiliently supported for rotational motion about a predetermined pliant coupling section axis, said pliant coupling section being displaced by at least one-quarter tine-length from a line joining the centers of gravity of said tines, the improvement comprising a counterweight portion, rigid relative to said common tine-junction portion, causing the center of gravity of the combination of said tines, said common tine-junction portion and said counterweight portion to be approximately coincident with said pliant coupling section.
Claim 8
Dependent Claim
120 words
In a tuning fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, and a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is resiliently supported for rotational motion about a predetermined pliant coupling section axis, said pliant coupling section being displaced by at least one-quarter tine-length from a line joining the centers of gravity of said tines, the improvement comprising a counterweight portion, rigid relative to said common tine-junction portion, causing the center of gravity of the combination of said tines, said common tine-junction portion and said counterweight portion to be approximately coincident with said pliant coupling section.
Claim 9
Dependent Claim
126 words
In a tuning fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, and a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is resiliently supported for rotational motion about a predetermined pliant coupling section axis, said pliant coupling section being displaced by at least one-quarter tine-length from a line joining the centers of gravity of said tines, the improvement comprising a counterweight portion, rigid relative to said common tine-junction portion, causing the center of gravity of the combination of said tines, said common tine-junction portion and said counterweight portion to be displaced from said pliant coupling section axis to the side opposite said tines.
Claim 10
Dependent Claim
126 words
In a tuning fork resonator comprising a fork having a pair of tines, a common tine-junction portion, a mounting portion secured to a base, and a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is resiliently supported for rotational motion about a predetermined pliant coupling section axis, said pliant coupling section being displaced by at least one-quarter tine-length from a line joining the centers of gravity of said tines, the improvement comprising a counterweight portion, rigid relative to said common tine-junction portion, causing the center of gravity of the combination of said tines, said common tine-junction portion and said counterweight portion to be displaced from said pliant coupling section axis to the side opposite said tines.
Claim 11
Dependent Claim
125 words
A fork resonator comprising a fork having a pair of tines connected at their bases to a rigid common tine-junction portion, a mounting portion secured to a base, a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is resiliently supported for oscillatory motion about a predetermined pliant coupling section axis, said common tine-junction portion having a rigid extension extending away from said pliant coupling section axis in a direction opposite said tines having a mass and position such that the center of gravity of the combination of Said tines, said common tine-junction portion and said extension is located approximately at the same position along the longitudinal dimension of said fork as said pliant coupling section.
Claim 12
Dependent Claim
125 words
A fork resonator comprising a fork having a pair of tines connected at their bases to a rigid common tine-junction portion, a mounting portion secured to a base, a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is resiliently supported for oscillatory motion about a predetermined pliant coupling section axis, said common tine-junction portion having a rigid extension extending away from said pliant coupling section axis in a direction opposite said tines having a mass and position such that the center of gravity of the combination of Said tines, said common tine-junction portion and said extension is located approximately at the same position along the longitudinal dimension of said fork as said pliant coupling section.
Claim 13
Dependent Claim
134 words
A fork resonator comprising a fork having a pair of tines connected at their bases to a rigid common tine-junction portion, a mounting portion secured to a base, a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is resiliently supported for oscillatory motion about a predetermined pliant coupling section axis, said common tine-junction portion having a rigid extension extending away from said pliant coupling section axis in a direction opposite said tines having a mass and position such that the center of gravity of the combination of said tines, said common tine-junction portion and said extension is located near to the same position along the longitudinal dimension of said fork as said pliant coupling section but displaced to the side thereof opposite said tines.
Claim 14
Dependent Claim
134 words
A fork resonator comprising a fork having a pair of tines connected at their bases to a rigid common tine-junction portion, a mounting portion secured to a base, a pliant coupling section connecting said common tine-junction portion with said mounting portion so that said common tine-junction portion is resiliently supported for oscillatory motion about a predetermined pliant coupling section axis, said common tine-junction portion having a rigid extension extending away from said pliant coupling section axis in a direction opposite said tines having a mass and position such that the center of gravity of the combination of said tines, said common tine-junction portion and said extension is located near to the same position along the longitudinal dimension of said fork as said pliant coupling section but displaced to the side thereof opposite said tines.
Claim 15
Dependent Claim
23 words
Apparatus as claimed in claim 7 wherein said mounting portion is on the same side of said pliant coupling section as said tines.
Claim 16
Dependent Claim
23 words
Apparatus as claimed in claim 7 wherein said mounting portions is on the opposite side of said pliant coupling section from said tines.
References Cited (Backward Citations)
US348604A
Cited
US2888582A
Cited
US2806400A
Cited
US3316708A
Cited
US3480809A
Cited
US3517230A
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |