Patent US3689989A successfully refreshed from Google Patents.
US3689989A
Expired / Lapsed
US
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Process of assembling solid electrolytic capacitors using vibration step with both low and high frequency components
Assignee: AT&T Inc
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Filing: 1970-10-02
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Granted: 1972-09-12
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Expires: 1990-10-02
Abstract
Abstract A solder preform slug and a processed anode are placed into a can. A glass end seal and an outer solder preform O-ring are placed on a lead extending from the anode. The assembled components are heated to the melting temperature of the solder preforms. The can is vibrated by applying high frequency vibrations to a bar supporting the can. The bar has a natural low frequency of vibration such that both the high frequency vibrations and the low frequency vibrations are applied to the can. The low frequency vibrations settle the anode into the can and release gases which are produced from rosin. The high frequency components produce rotation of the can which aids in the sealing of the end seal by the solder preform O-rings.
Inventors
- 👤 Grady L Mcclamrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:14
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
37 words
A process as defined in claim 1 wherein the frequency of vibration of the can has a low component between 200 and 400 cycles per second and a high component between 7,000 and 8,000 cycles per second.
Claim 2
Dependent Claim
15 words
A process as defined in claim 1 wherein the can is rotated by the vibrations.
Claim 3
Dependent Claim
14 words
A process as defined in claim 2 wherein the can is rotated by vibrations.
Claim 4
Dependent Claim
29 words
A process as defined in claim 3 wherein an end seal and a solder O-ring are placed over a lead extending from the anode prior to heating and vibrating.
Claim 5
Dependent Claim
29 words
A process as defined in claim 4 wherein an end seal and a solder O-ring are placed over a lead extending from the anode prior to heating and vibrating.
Claim 6
Dependent Claim
129 words
A process of assembling a plurality of capacitor anodes into a plurality of cans, one can for each anode comprising: placing the plurality of cans into a plurality of recesses in a holding member which has a natural frequency of vibration between 100 and 1,000 cycles per second; placing a plurality of solder preforms into the plurality of cans, one preform in each can; placing the plurality of anodes into the plurality of cans, one anode in each can; and exciting the holding member by a vibration having a frequency component between 3,000 and 10,000 cycles per second to vibrate the cans with both a low frequency component between 100 and 1, 000 cycles per second and a high frequency component between 3, 000 and 10,000 cycles per second.
Claim 7
Dependent Claim
40 words
A process as defined in claim 7 wherein the holding member has a natural frequency of vibration between 200 and 400 cycles per second and the holding member is excited by a frequency between 7,000 and 8,000 cycles per second.
Claim 8
Dependent Claim
12 words
A process as defined in claim 7 wherein the cans are rotated.
Claim 9
Dependent Claim
12 words
A process as defined in claim 8 wherein the cans are rotated.
Claim 10
Dependent Claim
33 words
A process as defined in claim 9 wherein an end seal and a solder O-ring are placed over a lead extending from each of the plurality of anodes prior to heating and vibrating.
Claim 11
Dependent Claim
33 words
A process as defined in claim 10 wherein an end seal and a solder O-ring are placed over a lead extending from each of the plurality of anodes prior to heating and vibrating.
References Cited (Backward Citations)
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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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |