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Patent US5079543A successfully refreshed from Google Patents.
US5079543A
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Monitoring device for at least one current pickup of a conveyor truck in a conveyor system running on tracks
Assignee: Buro Patent AG
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Filing: 1989-10-30
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Granted: 1992-01-07
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Expires: 2009-10-30
Abstract
Abstract A monitoring device is provided for at least one current pickup of a conveyor truck in a conveyor system running on tracks, whereby when viewed in a direction of travel the current pickup has a profile configuration which changes through wear as the pickup traverses a live rail. The device comprises a receiver for a test signal fixedly mounted on one side of the live rail, a transmitter mounted on the other side of the live rail, a test signal evaluating device that responds to a modified profile configuration of the current pickup resulting from wear, and an alarm signal triggered at a predetermined level of wear of the current pickup.
Inventors
- 👤 Herbert Pircher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:59
CPC Classifications
B; B60; B60L; B60L5/00; B60L5/38; H; H01; H01R; H01R39/00; H01R39/02; H01R39/58; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
A monitoring device for at least one current pickup of a conveyor truck in a conveyor system running on tracks, whereby said current pickup has a profile configuration which changes through wear as said pickup traverses a live rail, said device comprising: a means for transmitting a test signal from one side of said live rail between said current pickup and said live rail; a means for receiving said test signal from said transmitting means, said receiving means being fixedly mounted on a side opposite said one side of said live rail; a means for evaluating said test signal so that said device will respond to a modified profile configuration of said current pickup and serving as a wear indicator of said current pickup; and an alarm signal, said alarm signal being triggered at a predetermined level of wear of said current pickup as identified by said evaluating means.
Claim 2
Dependent Claim
149 words
A monitoring device for at least one current pickup of a conveyor truck in a conveyor system running on tracks, whereby said current pickup has a profile configuration which changes through wear as said pickup traverses a live rail, said device comprising: a means for transmitting a test signal from one side of said live rail between said current pickup and said live rail; a means for receiving said test signal from said transmitting means, said receiving means being fixedly mounted on a side opposite said one side of said live rail; a means for evaluating said test signal so that said device will respond to a modified profile configuration of said current pickup and serving as a wear indicator of said current pickup; and an alarm signal, said alarm signal being triggered at a predetermined level of wear of said current pickup as identified by said evaluating means.
Claim 3
Dependent Claim
70 words
A monitoring device according to claim 1 wherein said profile configuration of said current pickup comprises two projections separated by a recess, said projections contacting said live rail, said means for evaluating said test signal not responding to said test signal when said test signal arrives as a closely spaced pair of short signals, but does not respond to a relatively long single signal which then triggers said alarm signal.
Claim 4
Dependent Claim
26 words
A monitoring device according to claim 2 wherein said relatively long single signal lasts at least twice as long as said short signals in combined length.
Claim 5
Dependent Claim
15 words
A monitoring device according to claim 1, wherein said test signal is a light beam.
Claim 6
Dependent Claim
33 words
A monitoring device according to claim 4 wherein said light beam is directed over an area above said live rail, and said transmitters and receiving means being formed from at least one photoconductor.
Claim 7
Dependent Claim
22 words
A monitoring device according to claim 5 wherein at least two live rails are positioned between said transmitting and said receiving means.
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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |