Patent US1156145A successfully refreshed from Google Patents.
Patent US3880005A successfully refreshed from Google Patents.
US3880005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid level sight gage for dynamoelectric machine mounted within the machine frame
Assignee: General Electric Co
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Filing: 1973-11-12
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Granted: 1975-04-29
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Expires: 1993-11-12
Abstract
Abstract The invention relates to a recessed sight gage for providing a visual indication of the oil level with a dynamoelectric machine. The sight gage is mounted in a recessed slot in the frame of the machine. A flat, heat resistance sight glass surrounded by a radial compression member for edge mounting the glass is supported in the recessed slot. This recess is smaller than the glass and the compression member so that the glass held in place by radial compression thereby avoiding bending stresses on the face of the sight glass which might cause it to fracture at high temperature and high vibration.
Inventors
- 👤 John Leonard Butterfield
- 👤 James Lawrence Wenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:53
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
In an oil level sight gage for a dynamoelectric machine, the combination comprising, a. a dynamoelectric machine having an oil containing housing and means in said housing for mounting a sight gage so that the sight gage does not extend beyond the housing including, 1. a slot in said housing, 2. a recessed portion in said slot communication with the interior of said housing, said recessed portion defining a ledge for supporting a sight gage, b. a sight gage mounted in said slot and supported on said ledge, said sight gage including, 1. a transparent sight glass for providing a visible indication of the oil level in the interior of said housing, 2. a resilient edge mounting means for said glass comprising a radial member surrounding said sight glass, said radial member and said sight glass being larger than said recess whereby said member is compressed when mounted on said ledge defined by said recess thereby sealing said glass in said recess and applying radial pressure to the edge of said glass so that the sight glass is not subject to bending stresses as the housing flexes due to temperature and vibration.
Claim 2
Dependent Claim
192 words
In an oil level sight gage for a dynamoelectric machine, the combination comprising, a. a dynamoelectric machine having an oil containing housing and means in said housing for mounting a sight gage so that the sight gage does not extend beyond the housing including, 1. a slot in said housing, 2. a recessed portion in said slot communication with the interior of said housing, said recessed portion defining a ledge for supporting a sight gage, b. a sight gage mounted in said slot and supported on said ledge, said sight gage including, 1. a transparent sight glass for providing a visible indication of the oil level in the interior of said housing, 2. a resilient edge mounting means for said glass comprising a radial member surrounding said sight glass, said radial member and said sight glass being larger than said recess whereby said member is compressed when mounted on said ledge defined by said recess thereby sealing said glass in said recess and applying radial pressure to the edge of said glass so that the sight glass is not subject to bending stresses as the housing flexes due to temperature and vibration.
Claim 3
Dependent Claim
26 words
The oil level sight gage according to claim 1 wherein said radial compression member consists of an elastomer ring stretched around the periphery of said glass.
Claim 4
Dependent Claim
79 words
a resilient edge mounting means for said glass comprising a radial member surrounding said sight glass, said radial member and said sight glass being larger than said recess whereby said member is compressed when mounted on said ledge defined by said recess thereby sealing said glass in said recess and applying radial pressure to the edge of said glass so that the sight glass is not subject to bending stresses as the housing flexes due to temperature and vibration.
Claim 5
Dependent Claim
79 words
a resilient edge mounting means for said glass comprising a radial member surrounding said sight glass, said radial member and said sight glass being larger than said recess whereby said member is compressed when mounted on said ledge defined by said recess thereby sealing said glass in said recess and applying radial pressure to the edge of said glass so that the sight glass is not subject to bending stresses as the housing flexes due to temperature and vibration.
Claim 6
Dependent Claim
41 words
a recessed portion in said slot communication with the interior of said housing, said recessed portion defining a ledge for supporting a sight gage, b. a sight gage mounted in said slot and supported on said ledge, said sight gage including,
Claim 7
Dependent Claim
41 words
a recessed portion in said slot communication with the interior of said housing, said recessed portion defining a ledge for supporting a sight gage, b. a sight gage mounted in said slot and supported on said ledge, said sight gage including,
Claim 8
Dependent Claim
20 words
The oil level sight gage according to claim 1 including means mounted behind said glass for defining an oil chamber.
Claim 9
Dependent Claim
40 words
The oil level sight gage according to claim 3 wherein said chamber defining means includes a semicylindrical portion open at both ends to permit oil to flow into said chamber and flange means for supporting said semicylinder in said recess.
Claim 10
Dependent Claim
63 words
The oil level sight gage according to claim 4 including a cover mounted in said slot and above said sight gage, said cover having an opening therein to permit viewing of said sight glass, said cover being mounted to provide clearance between said glass and said cover whereby said cover does not exert any compressional force on the surface of said sight glass.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |