US3645144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable tensioning structure for centrifugal compressor control
Assignee: Carrier Corp
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Filing: 1970-06-22
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Granted: 1972-02-29
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Expires: 1990-06-22
Abstract
Abstract An arrangement to provide proper tension on the cable for operating the capacity control mechanism of a centrifugal compressor. One end of the cable is wrapped about a pulley member and fixed thereto. The opposite end of the cable is wrapped in opposite direction about the pulley member and has a threaded terminal piece extending through a lug formed on the pulley. A compression spring means is positioned on the extending portion of the terminal between the lug and a nut threaded on the terminal. As the nut is threaded on the terminal, tension is applied to the cable. The arrangement includes means indicating the extent of the applied tension and to limit the tension to a maximum amount.
Inventors
- 👤 Kenneth C Barrows Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:11
CPC Classifications
G; G05; G05G; G05G7/00; G05G7/02; G05G7/10; F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/4206; F04D29/4213; F04D29/44; F04D29/46; F04D29/462; F16; F16C; F16C1/00; F16C1/10; F16C1/12; F16C1/18; F16C1/22; F16C1/223; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/51; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18832
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
221 words
A centrifugal refrigeration compressor including a capacity control mechanism having a circular series of control actuating shafts, and a cable operatively connected to all of said shafts for operating the same in unison, a pulley member fixed to one of said shafts and being formed with an arcuate peripheral surface and having an outwardly extending lug positioned at one end of said peripheral surface, the free end portions of said cable extending tangentially to said peripheral surface, one of said end portions being wrapped about said surface and being fixedly secured to said pulley member, the other end portion of said cable being wrapped about said peripheral surface in opposite direction and having fixedly secured thereto a rigid externally threaded terminal extending outwardly through said lug, spring means positioned on the outwardly extending portion of said terminal between said lug and a nut threaded on said terminal, said nut being operable upon being threaded on said terminal toward said lug to tension said cable, means carried by said terminal for indicating the amount of tension imparted to said cable and stop means fixedly secured to said terminal and being movable into engagement with said lug upon threading said nut on said terminal toward said lug, said stop means being operable upon such engagement to limit said tension to a predetermined maximum.
Claim 2
Dependent Claim
221 words
A centrifugal refrigeration compressor including a capacity control mechanism having a circular series of control actuating shafts, and a cable operatively connected to all of said shafts for operating the same in unison, a pulley member fixed to one of said shafts and being formed with an arcuate peripheral surface and having an outwardly extending lug positioned at one end of said peripheral surface, the free end portions of said cable extending tangentially to said peripheral surface, one of said end portions being wrapped about said surface and being fixedly secured to said pulley member, the other end portion of said cable being wrapped about said peripheral surface in opposite direction and having fixedly secured thereto a rigid externally threaded terminal extending outwardly through said lug, spring means positioned on the outwardly extending portion of said terminal between said lug and a nut threaded on said terminal, said nut being operable upon being threaded on said terminal toward said lug to tension said cable, means carried by said terminal for indicating the amount of tension imparted to said cable and stop means fixedly secured to said terminal and being movable into engagement with said lug upon threading said nut on said terminal toward said lug, said stop means being operable upon such engagement to limit said tension to a predetermined maximum.
Claim 3
Dependent Claim
70 words
A structure as set forth in claim 1 and including a washer member positioned on said terminal intermediate said spring means and said nut, a second washer member positioned on said terminal intermediate the opposite end of said spring means and said lug, said washer members being formed with cylindrical flanges extending in confronting relation, said flanges normally terminating in spaced-apart relation to indicate the tension imparted to said cable.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |