US4464598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric resonator with "drawer"
Assignee: L'ETAT FRANCAIS
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Filing: 1981-11-19
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Granted: 1984-08-07
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Expires: 2001-11-19
Abstract
Abstract A quartz resonator drawer is housed in a monolithic block cabinet made of quartz. Air gap electrodes are provided on interior walls of the cabinet. The resonator drawer can be removed from the cabinet without dissemblying the electrodes or the cabinet.
Inventors
- 👤 Raymond J. C. Besson
- 👤 Pierre C. Maitre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:06
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/15; H03H9/17; H03H9/19; H03H9/02; H03H9/05; H03H9/10; H03H9/1007; H03H9/1014
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
248 words
A piezoelectric resonator of the type comprising an airtight casing in which a vacuum has been created or an inert gas introduced, and inside this casing, at least one piezoelectric quartz crystal drawer provided with a peripheral part forming a ring connected to a central part by an intermediate zone which has a short length in the radial direction, electrodes placed respectively opposite each of the faces of the central part of the quartz crystal drawer, at a small distance from these, and means for maintaining the electrodes and quartz crystal drawer in predetermined relative positions inside the casing, whereby the means for maintaining the electrodes and quartz crystal drawer in position are provided comprising a single unit of rigid dielectric material forming a cabinet in which at least one drawer-like opening is made which has a section greater than the section of the quartz crystal drawer to permit the quartz crystal drawer to be inserted through said drawer-like opening and positioned within said cabinet, and the electrodes are deposited on the rigid dielectric cabinet in the central part respectively of the upper and lower faces of the drawer-like opening and the quartz crystal drawer is fixed in said drawer-like opening by its peripheral part in a manner such that the central part of the quartz crystal drawer remains located opposite the electrodes and spaced apart therefrom and the quartz crystal drawer is removable from said rigid dielectric cabinet without disassemblying said electrodes and said rigid dielectric cabinet.
Claim 2
Dependent Claim
248 words
A piezoelectric resonator of the type comprising an airtight casing in which a vacuum has been created or an inert gas introduced, and inside this casing, at least one piezoelectric quartz crystal drawer provided with a peripheral part forming a ring connected to a central part by an intermediate zone which has a short length in the radial direction, electrodes placed respectively opposite each of the faces of the central part of the quartz crystal drawer, at a small distance from these, and means for maintaining the electrodes and quartz crystal drawer in predetermined relative positions inside the casing, whereby the means for maintaining the electrodes and quartz crystal drawer in position are provided comprising a single unit of rigid dielectric material forming a cabinet in which at least one drawer-like opening is made which has a section greater than the section of the quartz crystal drawer to permit the quartz crystal drawer to be inserted through said drawer-like opening and positioned within said cabinet, and the electrodes are deposited on the rigid dielectric cabinet in the central part respectively of the upper and lower faces of the drawer-like opening and the quartz crystal drawer is fixed in said drawer-like opening by its peripheral part in a manner such that the central part of the quartz crystal drawer remains located opposite the electrodes and spaced apart therefrom and the quartz crystal drawer is removable from said rigid dielectric cabinet without disassemblying said electrodes and said rigid dielectric cabinet.
Claim 3
Dependent Claim
52 words
A resonator according to claim 1, wherein the piezoelectric quartz crystal drawer rests by portions of its peripheral part directly on the lower face of the drawer-like opening of the dielectric cabinet in zones of said lower face which are in the shape of the peripheral part of the quartz crystal drawer.
Claim 4
Dependent Claim
43 words
A resonator according to claim 2, including mechanical means for maintaining the peripheral part of the quartz crystal drawer to maintain portions of this peripheral part in contact with said zones of the lower face of the drawer-like opening of the dielectric cabinet.
Claim 5
Dependent Claim
17 words
A resonator according to claim 3, wherein the mechanical means for maintaining comprise an elastic holding means.
Claim 6
Dependent Claim
39 words
A resonator according to claim 1, wherein the peripheral part of the lower face of the drawer-like opening of the dielectric cabinet projects with respect to the central part of said lower face on which an electrode is deposited.
Claim 7
Dependent Claim
32 words
A resonator according to claim 1, wherein the drawer-like opening of the dielectric cabinet has a larger section in a portion located close to the intermediate zone of the quartz crystal drawer.
Claim 8
Dependent Claim
18 words
A resonator according to claim 1, wherein the quartz crystal drawer is mounted removably in the dielectric cabinet.
Claim 9
Dependent Claim
74 words
A resonator according to claim 3, wherein the mechanical means for maintaining comprise needles, each of said needles engaging and sliding in an orifice made in the upper part of the dielectric cabinet, each needle cooperating with a spring means to exert a pressure on the peripheral part of the quartz crystal drawer and maintain the latter in contact with the peripheral zone of the lower face of the opening of the dielectric cabinet.
Claim 10
Dependent Claim
38 words
A resonator according to claim 8, wherein the needles engage at least partially in the holes made in the peripheral part of the quartz crystal drawer in order to lock the quartz crystal drawer in a predetermined position.
Claim 11
Dependent Claim
34 words
A resonator according to claim 8, wherein the dielectric cabinet is maintained inside the casing by hoops fixed to said casing and the spring means are comprised of leaf springs cooperating with the hoops.
Claim 12
Dependent Claim
15 words
A resonator according to claim 1, wherein the dielectric cabinet is of a parallelpipedal form.
Claim 13
Dependent Claim
43 words
A resonator according to claim 1, wherein the drawer-like opening made in the dielectric cabinet has the shape of a slit of variable height of which the lower and upper faces are plane and parallel at least in the part supporting the electrodes.
Claim 14
Dependent Claim
13 words
A resonator according to claim 12, wherein the electrodes are square-like in shape.
Claim 15
Dependent Claim
32 words
A resonator according to claim 12, wherein the drawer-like opening made in the dielectric cabinet has the shape of a slit of which the small lateral faces are parallel to one another.
Claim 16
Dependent Claim
30 words
A resonator according to claim 14, wherein the piezoelectric quartz crystal drawer inserted in the drawer-like opening of the dielectric cabinet extends beyond the front external faces of said cabinet.
Claim 17
Dependent Claim
41 words
A resonator according to claim 15, wherein the piezoelectric quartz crystal drawer has the shape of a disc of a diameter slightly smaller than the width of the drawer-like opening in the shape of a slit made in the dielectric cabinet.
Claim 18
Dependent Claim
54 words
A resonator according to claim 9, in which the quartz crystal drawer comprises hollow portions in its intermediate part and has thin connecting bridges between its peripheral and central parts, characterised in that the holes made in the peripheral part of the quartz crystal drawer are located in zones away from the connecting bridges.
Claim 19
Dependent Claim
68 words
A resonator according to claim 17, wherein the dielectric cabinet includes at least two extensions between which rests an additional piezoelectric crystal provided with electrodes, said additional crystal modifying the required distance between the central parts of the lower and upper faces of the drawer-like opening of said dielectric cabinet carrying the electrodes in accordance with the electric voltage applied to the electrodes of the additional piezoelectric crystal.
Claim 20
Dependent Claim
39 words
A resonator according to claim 1, wherein the dielectric cabinet comprises a plurality of superimposed drawer-like openings provided with electrodes and each fitted with a piezoelectric quartz crystal drawer to form a plurality of resonators in a single cabinet.
Claim 21
Dependent Claim
37 words
A resonator according to claim 19, wherein the dielectric cabinet comprises two superimposed similar drawer-like openings each fitted with a piezoelectric quartz crystal drawer and the two quartz crystal drawers cooperate with at least one common electrode.
Claim 22
Dependent Claim
221 words
A piezoelectric resonator of the type comprising an airtight casing in which a vacuum has been created or an inert gas introduced, and inside the casing, at least one piezoelectric quartz crystal drawer provided with a peripheral part forming a ring connected to a central part by an intermediate zone which has a short length in the radial direction, electrodes placed respectively opposite each of the faces of the central and peripheral parts of the quartz crystal drawer at a small distance therefrom, and means for maintaining the electrodes and quartz crystal drawer in predetermined relative positions inside the casing, whereby the means for maintaining the electrodes and quartz crystal drawer in position comprise a single unit of rigid dielectric material forming a cabinet in which at least one drawer-like opening is made which has a section greater than the section of the quartz crystal drawer to permit the quartz crystal drawer to be inserted through said drawer-like opening and positioned within said cabinet, and wherein electrodes are deposited on the peripheral part respectively of the upper and lower faces of the drawer-like opening and the quartz crystal drawer is fixed in said drawer-like opening by its central part in a manner such that the peripheral part of the quartz crystal drawer remains located opposite the electrodes without contacting said electrodes.
Claim 23
Dependent Claim
221 words
A piezoelectric resonator of the type comprising an airtight casing in which a vacuum has been created or an inert gas introduced, and inside the casing, at least one piezoelectric quartz crystal drawer provided with a peripheral part forming a ring connected to a central part by an intermediate zone which has a short length in the radial direction, electrodes placed respectively opposite each of the faces of the central and peripheral parts of the quartz crystal drawer at a small distance therefrom, and means for maintaining the electrodes and quartz crystal drawer in predetermined relative positions inside the casing, whereby the means for maintaining the electrodes and quartz crystal drawer in position comprise a single unit of rigid dielectric material forming a cabinet in which at least one drawer-like opening is made which has a section greater than the section of the quartz crystal drawer to permit the quartz crystal drawer to be inserted through said drawer-like opening and positioned within said cabinet, and wherein electrodes are deposited on the peripheral part respectively of the upper and lower faces of the drawer-like opening and the quartz crystal drawer is fixed in said drawer-like opening by its central part in a manner such that the peripheral part of the quartz crystal drawer remains located opposite the electrodes without contacting said electrodes.
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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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |