公开(公告)号：US2883293A

公开(公告)日：1959-04-21

申请号：US66498357

申请日：1957-06-11

Applicant: SERVO CORP OF AMERICA

Inventor： JERGER JR JOSEPH ,  MCKENNA JOHN F

IPC: C03C3/32

CPC classification number: C03C3/321 ,  Y10S501/904

公开(公告)号：US2883291A

公开(公告)日：1959-04-21

申请号：US64469057

申请日：1957-03-07

Applicant: SERVO CORP OF AMERICA

Inventor： FRASER WALTER A

IPC: C03C3/32

CPC classification number: C03C3/321 ,  Y10S65/15 ,  Y10S501/904

公开(公告)号：US2878710A

公开(公告)日：1959-03-24

申请号：US44387554

申请日：1954-07-16

Applicant: SERVO CORP OF AMERICA

Inventor： WILLEY FRANK G

IPC: G01S1/02 ,  G01S19/25 ,  G02B27/00

CPC classification number: G01S1/02

公开(公告)号：US2859652A

公开(公告)日：1958-11-11

申请号：US36407553

申请日：1953-06-25

Applicant: SERVO CORP OF AMERICA

Inventor： HOPGOOD ROY C

IPC: H01L47/00 ,  H04N3/02 ,  H04N3/09

CPC classification number: H04N3/09 ,  H01L47/00 ,  H04N3/02

公开(公告)号：US2832820A

公开(公告)日：1958-04-29

申请号：US34336953

申请日：1953-03-19

Applicant: SERVO CORP OF AMERICA

Inventor： HENRY BLACKSTONE

IPC: G03G15/32 ,  H04N3/08

CPC classification number: H04N3/08 ,  G03G15/325 ,  Y10S246/01

公开(公告)号：CA2015412A1

公开(公告)日：1991-01-06

申请号：CA2015412

申请日：1990-04-25

Applicant: SERVO CORP OF AMERICA

Inventor： BAMBARA JOSEPH E

IPC: B61K9/04 ,  G01H1/00 ,  G01H3/08 ,  G01N29/14 ,  G01N29/38

公开(公告)号：GB9022564D0

公开(公告)日：1990-11-28

申请号：GB9022564

申请日：1990-10-17

Applicant: SERVO CORP OF AMERICA

IPC: G01N29/30 ,  G01N29/34

公开(公告)号：GB9004343D0

公开(公告)日：1990-04-25

申请号：GB9004343

申请日：1990-02-27

Applicant: SERVO CORP OF AMERICA

IPC: B61K9/04 ,  G01H1/00 ,  G01H3/08 ,  G01N29/14 ,  G01N29/38

公开(公告)号：AU2169388A

公开(公告)日：1989-04-06

申请号：AU2169388

申请日：1988-08-31

Applicant: SERVO CORP OF AMERICA

Inventor： BAMBARA JOSEPH E ,  FRAREY JOHN L ,  SMITH RICHARD L

IPC: B61K9/04 ,  G01N29/14 ,  G01M13/04

Abstract: This invention relates to apparatus for the detection of accustic impact frequencies, characteristic of bearing assembly failure during operation, which modulate an acoustic carrier frequency band. This apparatus allows for on-site or field application with high-level of ambient noise such as are present in railroad yards. This apparatus allows for early detection of such failures, so that a repair may be made before damaging heat build-up or catastrophic bearing failure occurs. Additionally, with sufficient early warning in railroad applications, a train may continue running to a railyard for convenient shop repair rather than expensive field repair.

公开(公告)号：IN154899B

公开(公告)日：1984-12-22

申请号：IN1008CA1981

申请日：1981-09-08

Applicant: SERVO CORP OF AMERICA

Inventor： SANVILLE WALTER WOODWARD

IPC: B61K11/00 ,  B61L1/08 ,  B61L1/16 ,  B61L1/18

Abstract: A method is provided for determining whether an output signal from a magnetic railway wheel detector is produced by the actual passage of a wheel over the transducer. The output signal is compared with an amplitude threshold value and the time period between the zero crossing point and the time at which the signal attains amplitude threshold is compared with a time threshold level. The thresholds are set as a function of the speed of the train. Unless the thresholds are exceeded the output signal is disregarded.