Patent US3839652A successfully refreshed from Google Patents.
US3839652A
Expired / Lapsed
US
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Piezoelectrically driven telephone type-ringer
Assignee: Motorola Solutions Inc
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Filing: 1973-02-08
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Granted: 1974-10-01
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Expires: 1993-02-08
Abstract
Abstract A piezoelectrically driven telephone-type ringer comprises a pair of gongs, a clapper rod including a clapper mounted on a free end thereof between the gongs and a piezoelectric driver device coupled to the opposite end of the clapper rod, to provide vibratory motion thereto for engagement with the gongs. The piezoelectric device is preferably of a type similar to that shown in U.S. Pat. No. 3,676,722, including a circular bender element operable in an oil can mode; i.e. the center point thereof being displaceable alternately in opposite directions substantially perpendicular to the plane of the element. A clapper rod support structure couples the piezoelectric device to the clapper rod. The support structure is fabricated of spring metal including a planar member coupled to the piezoelectric device for movement in a direction longitudinally of the plane of the member. The clapper rod is attached to a surface of the planar member, substantially perpendicular thereto, so that energization of the element with alternately poled current causes the member to move in a back and forth motion, thereby moving the clapper rod in opposite directions into alternate engagement with the gongs. The displacement of the piezoelectric element is small, but is magnified by the provision of a relatively stiff clapper rod to produce a high system resonant frequency, greater than the frequency of alternating current conventionally applied to a telephone-type ringer. The clapper fits loosely on the clapper rod to minimize its affect on the system resonant frequency.
Inventors
- 👤 H Schafft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:32
CPC Classifications
G; G10; G10K; G10K1/00; G10K1/06; G10K1/062
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
294 words
Telephone-type ringer apparatus operable from a source of alternating current having a predetermined frequency; said apparatus including in combination: gong means, clapper means including a substantially rigid support rod mounted with one end adjacent said gong means for striking engagement therewith; piezoelectric driver means including at least one circular piezoelectric element operable in an oil can mode for predetermined displacement at the center thereof in a back and forth motion and for providing a resultant, relatively high force upon energization by application of said alternating current; and support rod support structure means for translating and magnifying the predetermined displacement of said element into a greater displacement of said one end of said support rod adjacent said gong means while maintaining a relatively high force output thereat, said support rod structure including a first planar member extending substantially perpendicular to the surface of said piezoelectric element and attached at one end thereto, and a second planar member hingedly connected at one end to the free end of said first planar member and extending substantially perpendicular thereto, the opposite end of said second planar member being held pivotally at a fixed location, said first planar member being flexible and movable in a back and forth motion along the extent of the plane thereof in response to the energization of said piezoelectric element, said support rod being attached near the end thereof opposite said end adjacent said gong means, substantially perpendicular to the surface of said first planar member for vibratory movement in response to the movement of said member upon energization of said piezoelectric element so that said one end of said support rod strikes said gong means, the system resonance frequency of said ringer apparatus being substantially greater than the frequency of said alternating current.
Claim 2
Dependent Claim
294 words
Telephone-type ringer apparatus operable from a source of alternating current having a predetermined frequency; said apparatus including in combination: gong means, clapper means including a substantially rigid support rod mounted with one end adjacent said gong means for striking engagement therewith; piezoelectric driver means including at least one circular piezoelectric element operable in an oil can mode for predetermined displacement at the center thereof in a back and forth motion and for providing a resultant, relatively high force upon energization by application of said alternating current; and support rod support structure means for translating and magnifying the predetermined displacement of said element into a greater displacement of said one end of said support rod adjacent said gong means while maintaining a relatively high force output thereat, said support rod structure including a first planar member extending substantially perpendicular to the surface of said piezoelectric element and attached at one end thereto, and a second planar member hingedly connected at one end to the free end of said first planar member and extending substantially perpendicular thereto, the opposite end of said second planar member being held pivotally at a fixed location, said first planar member being flexible and movable in a back and forth motion along the extent of the plane thereof in response to the energization of said piezoelectric element, said support rod being attached near the end thereof opposite said end adjacent said gong means, substantially perpendicular to the surface of said first planar member for vibratory movement in response to the movement of said member upon energization of said piezoelectric element so that said one end of said support rod strikes said gong means, the system resonance frequency of said ringer apparatus being substantially greater than the frequency of said alternating current.
Claim 3
Dependent Claim
96 words
Telephone-type ringer apparatus as claimed in claim 1 wherein said one piezoelectric element has a diameter of a predetermined length and wherein said piezoelectric driver means further includes a secoNd circular element having a diameter similar to that of said piezoelectric element, said elements being joined together near the edges thereof and a third circular element having raised portions interposed between said piezoelectric and second elements, the raised portions of said third element being higher at the center thereof and diminishing in height toward the edge, causing said outer elements to be convex in opposite directions.
Claim 4
Dependent Claim
63 words
Telephone-type ringer apparatus as claimed in claim 2 wherein said third circular element comprises a corrugated vane member having a plurality of corrugations of varying size, the larger corrugations being located centrally of said element and the size of said corrugation gradually diminishing toward the periphery of said element, the apices of said corrugations being coupled to said first and second elements, respectively.
Claim 5
Dependent Claim
86 words
Telephone-type ringer apparatus as claimed in claim 1 wherein said clapper means includes a gong striking member mounted on said support rod at the end thereof adjacent said gong means, said striking member having an aperture therethrough, larger in dimension than the outer dimension of said support rod and receiving said support rod therein, said striking member being freely movable with respect to said support rod and being movable thereby for engagement with said gong means in response to the operation of said piezoelectric driver means.
Claim 6
Dependent Claim
54 words
Telephone-type ringer apparatus as claimed in claim 4 wherein said gong means includes a pair of gongs mounted in spaced relation with the end of said support rod including said striking member positioned therebetween for sequential engagement thereof in accordance with the operation of said piezoelectric driver means by said source of alternating current.
Claim 7
Dependent Claim
270 words
Telephone-type ringer apparatus operable from a source of alternately applied opposite polarity current; said apparatus including in combination: gong means; clapper means including a substantially rigid support rod mounted with one end adjacent said gong means for striking engagement therewith; piezoelectric drive means including a piezoelectric element movable in an oil can mode for predetermined displacement thereof and for providing a resultant, relatively high force upon energization by application of said current; a clapper rod support structure for translating and magnifying the predetermined displacement of said element into a predeterminedly larger displacement of said one end of said support rod while maintaining a relatively high force output, said support structure including a U-shaped member having first and second legs and a base member adjoining said legs at said first ends thereof, a first leg of said support structure being held rigidly at a predetermined location and the free end of said second leg being coupled to said piezoelectric element, said support rod being attached to said second leg near the opposite end of said rod, and extending outwardly therefrom at substantially right angles with respect thereto, said second leg being driven in a back and forth motion along the plane thereof in response to the energization of said piezoelectric element, said support member bending at the areas of interconnection between said base portion and said legs in response thereto, to drive said support rod in a vibratory motion so that said one end is driven into striking engagement with said gong means, the system resonant frequency of said ringer apparatus being substantially greater than the frequency of said alternating current.
Claim 8
Dependent Claim
270 words
Telephone-type ringer apparatus operable from a source of alternately applied opposite polarity current; said apparatus including in combination: gong means; clapper means including a substantially rigid support rod mounted with one end adjacent said gong means for striking engagement therewith; piezoelectric drive means including a piezoelectric element movable in an oil can mode for predetermined displacement thereof and for providing a resultant, relatively high force upon energization by application of said current; a clapper rod support structure for translating and magnifying the predetermined displacement of said element into a predeterminedly larger displacement of said one end of said support rod while maintaining a relatively high force output, said support structure including a U-shaped member having first and second legs and a base member adjoining said legs at said first ends thereof, a first leg of said support structure being held rigidly at a predetermined location and the free end of said second leg being coupled to said piezoelectric element, said support rod being attached to said second leg near the opposite end of said rod, and extending outwardly therefrom at substantially right angles with respect thereto, said second leg being driven in a back and forth motion along the plane thereof in response to the energization of said piezoelectric element, said support member bending at the areas of interconnection between said base portion and said legs in response thereto, to drive said support rod in a vibratory motion so that said one end is driven into striking engagement with said gong means, the system resonant frequency of said ringer apparatus being substantially greater than the frequency of said alternating current.
Claim 9
Dependent Claim
41 words
Telephone-type ringer apparatus as claimed in claim 6 wherein said piezoelectric driver means comprises a circular driver having at least one convex piezoelectric element and a second element convex in the opposite direction attached to said piezoelectric element at the periphery.
Claim 10
Dependent Claim
77 words
Telephone-type ringer apparatus as claimed in claim 7 wherein said support rod is of a highly rigid material and has a predetermined thickness, and wherein said support rod inclUdes at the free end thereof a gong striking member, said gong striking member including an aperture therein larger in dimension than the outside dimension of said support rod, the last-mentioned rod received in said aperture to mount said striking member loosely thereon for independent movement with respect thereto.
Claim 11
Dependent Claim
55 words
Telephone-type ringer apparatus as claimed in claim 6 wherein the free end of said support rod passes through said first and second legs of said support structure, whereby upon energization of said piezoelectric drive means, said rod is pivoted about the end portion thereof passing through said rigidly held first leg of said support structure.
Claim 12
Dependent Claim
233 words
Apparatus for driving an elongated member in a vibratory mode by the application to said apparatus of an alternately poled current, said apparatus including in combination: piezoelectric driver means including at least one piezoelectric element operable in an oil can mode for predetermined displacement thereof in a back and forth motion and for providing a resultant, relatively high force, upon energization by application of said current; and a support structure for said member coupled to said piezoelectric driver means for translating and magnifying the predetermined displacement of said element while maintaining a relatively high force output, said support structure including a first planar member extending generally perpendicular to the surface of said piezoelectric element and attached at one end thereto, and a second planar member hingedly connected at one end to the free end of said first planar member and extending substantially perpendicular thereto, the opposite end of said second planar member being held pivotally at a fixed location, said first planar member being movable in a back and forth motion along the extent of the plane thereof in response to the energization of said piezoelectric element, said member being attached near one end thereof, substantially perpendicular to the surface of said first planar member and in parallel relation to said second planar member for vibratory movement in response to the movement of said first planar member upon energization of said piezoelectric element.
Claim 13
Dependent Claim
233 words
Apparatus for driving an elongated member in a vibratory mode by the application to said apparatus of an alternately poled current, said apparatus including in combination: piezoelectric driver means including at least one piezoelectric element operable in an oil can mode for predetermined displacement thereof in a back and forth motion and for providing a resultant, relatively high force, upon energization by application of said current; and a support structure for said member coupled to said piezoelectric driver means for translating and magnifying the predetermined displacement of said element while maintaining a relatively high force output, said support structure including a first planar member extending generally perpendicular to the surface of said piezoelectric element and attached at one end thereto, and a second planar member hingedly connected at one end to the free end of said first planar member and extending substantially perpendicular thereto, the opposite end of said second planar member being held pivotally at a fixed location, said first planar member being movable in a back and forth motion along the extent of the plane thereof in response to the energization of said piezoelectric element, said member being attached near one end thereof, substantially perpendicular to the surface of said first planar member and in parallel relation to said second planar member for vibratory movement in response to the movement of said first planar member upon energization of said piezoelectric element.
Claim 14
Dependent Claim
116 words
Apparatus as claimed in claim 10 wherein said support structure is U-shaped with said first planar member being one of the legs of the U and the second planar member being the base of the U, and including a second leg extending substantially parallel to said first leg, the legs of said U-shaped support structure being hingedly connected to the base portion thereof and said second leg of the support structure being held fixed, and wherein said one end of said elongated member is attached to said support structure in parallel relation to said base portion for parallel movement therewith about the free end of said member in response to the energization of said piezoelectric element.
Claim 15
Dependent Claim
35 words
Apparatus as claimed in claim 11 wherein said one end of said elongated member passes through said first leg of said U-shaped structure and is attached pivotally to said second leg of said support structure.
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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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |