US3631481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound generator
Assignee: Cooper Wheelock Inc
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Filing: 1969-11-26
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Granted: 1971-12-28
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Expires: 1989-11-26
Abstract
Abstract A compact sound generator which includes an insulating supporting base having an integrally formed bobbin, a passage extending through the bobbin and the support for accommodating therein a reciprocating plunger, an electrical winding on the bobbin which actuates the plunger upon energization, and a resilient sound-generating diaphragm strip mounted at opposite ends to the support with the unsupported intermediate span engageable by the plunger to generate the sound.
Inventors
- 👤 Rein Haus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:49
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
81 words
A sound generator comprising a support base, a resilient sound-generating diaphragm strip mounted at opposite ends to the support with an unsupported intermediate span, a bobbin integrally formed on the support, a passage through the bobbin and the support, a plunger accommodated within said passage and free to reciprocate within the passage and to thereby engage and disengage the unsupported span of the diaphragm, and an electrical winding on the bobbin energizable to actuate the plunger and cause it to reciprocate.
Claim 2
Dependent Claim
81 words
A sound generator comprising a support base, a resilient sound-generating diaphragm strip mounted at opposite ends to the support with an unsupported intermediate span, a bobbin integrally formed on the support, a passage through the bobbin and the support, a plunger accommodated within said passage and free to reciprocate within the passage and to thereby engage and disengage the unsupported span of the diaphragm, and an electrical winding on the bobbin energizable to actuate the plunger and cause it to reciprocate.
Claim 3
Dependent Claim
70 words
A sound generator as set forth in claim 11 in which the diaphragm is connected in series with the plunger to complete the electrical circuit to energize the winding when the plunger engages the diaphragm, and including a spring contact in constant engagement with the end of the plunger opposite the end which engages the diaphragm and connected in series with the plunger and the diaphragm to energize the winding.
Claim 4
Dependent Claim
53 words
A sound generator as set forth in claim 1 including adjustable means carried by the support and engageable with a span of the diaphragm intermediate the plunger and a mounted end of the diaphragm for exerting a variable force on the diaphragm to vary the frequency and amplitude of vibration of the diaphragm.
Claim 5
Dependent Claim
26 words
A sound generator as set forth in claim 1 in which said adjustable means is an adjustable threaded screw having one end engageable with said diaphragm.
Claim 6
Dependent Claim
46 words
A sound generator as set forth in claim 1 including a magnetic flux return yoke having a pair of arms and means formed in the support for slidable receiving the yoke so that the arms of the yoke are located at opposite ends of said passage.
Claim 7
Dependent Claim
85 words
A sound generator as set forth in claim 1 in which said means formed in the support for slidably receiving the arms of the magnetic flux return yoke includes an open-ended recess formed in the end of the bobbin for receiving one of the arms, a shoulder within said recess against which one of the arms of the magnetic flux return yoke slidably engages, and a guide slot spaced apart from said shoulder for slidably receiving the other arm of said magnetic flux return yoke.
Claim 8
Dependent Claim
34 words
A sound generator as set forth in claim 1 in which one of the arms of the magnetic flux yoke has an opening therein to receive the plunger and permit it to reciprocate freely.
Claim 9
Dependent Claim
83 words
A sound generator as set forth in claim 1 including a leaf-type contact spring in constant engagement with the end of the plunger opposite the end which engages the diaphragm and connected in series with the plunger and the diaphragm to energize the winding and a recess formed in the end of the bobbin for accommodating the leaf-type contact spring intermediate the plunger and one of the arms of the yoke to enable the leaf contact spring to maintain contact with the plunger.
Claim 10
Dependent Claim
93 words
A sound generator as set forth in claim 1 in which said support includes an extended base on which the bobbin upstands at the center and depending legs at opposite ends of said base, and including terminals mounted on said base on opposite sides of said bobbin, an electrically conductive mounting which serves both as a mounting for one end of the diaphragm and as an electrical connection between a terminal and the diaphragm and a slot formed in the opposite leg of the base for receiving the opposite end of the diaphragm.
Claim 11
Dependent Claim
28 words
A sound generator as set forth in claim 1 including a cover snap locking with said base and having integrally formed bosses thereon for mounting the sound generator.
Claim 12
Dependent Claim
18 words
A sound generator as set forth in claim 1 wherein the support base is made of insulating material.
References Cited (Backward Citations)
US2227289A
Cited
US3408645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |