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公开(公告)号：US3872456A
公开(公告)日：1975-03-18
申请号：US44866874
申请日：1974-03-06
Applicant: SERVO CORP OF AMERICA
Inventor： GLAZAR ARTHUR J
CPC classification number: B61K9/06 , B60L3/00 , B60L2200/26 , H03K5/24
Abstract: A two-level alarm monitor for use with a hot box detector system of the type having first and second sensors each associated with a rail of a track is provided. The monitor includes means connected to the outputs of the sensors for obtaining the difference between the output signals of the sensors and for comparing the difference alternately to first and second predetermined levels which may, for example, represent ''''warm'''' and ''''hot'''' differential alarm levels or differential alarm levels for friction and roller bearings. The outputs of the sensors are also alternately compared with third and fourth predetermined levels which could, for example, represent ''''warm'''' and ''''hot'''' absolute alarm levels or absolute alarm levels for friction or roller bearings. The output signals from the comparators are demultiplexed and utilized to generate an alarm signal in the event differential signals or absolute alarm signals exceed associated predetermined levels.
Abstract translation: 提供了一种与具有第一和第二传感器的类型的热箱检测器系统一起使用的两级报警监视器，每个传感器与轨道的轨道相关联。 监视器包括连接到传感器的输出的装置，用于获得传感器的输出信号之间的差异，并且用于将差异交替地与第一和第二预定水平进行比较，这可以例如表示“暖”和“热”差分报警 摩擦和滚子轴承的水平或差动报警水平。 传感器的输出也与第三和第四预定水平交替地进行比较，这可以例如表示用于摩擦或滚子轴承的“暖”和“热”绝对报警水平或绝对报警水平。 在差分信号或绝对报警信号超过相关预定电平的情况下，来自比较器的输出信号被解复用并产生报警信号。
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公开(公告)号：US3573441A
公开(公告)日：1971-04-06
申请号：US3573441D
申请日：1968-08-29
Applicant: SERVO CORP OF AMERICA
Inventor： GLAZAR ARTHUR J
Abstract: An apparatus for measuring the length of a moving railroad train is provided. The apparatus includes two sensors mounted on a rail of the track in relatively close proximity to one another and two counting circuits, each of which is operatively connected to the sensors and counts the pulses from an associated fixed frequency pulse generator. The first counting circuit is enabled when a wheel passes the first sensor and disabled when that wheel passes the second sensor. The second counting circuit counts the pulses during the time interval between successive wheels passing one of the sensors. An arithmetic unit is also provided which computes the quotient of the counts of the first and second counting circuits. The quotient is directly proportional to the distance between the successive wheels. The arithmetic unit also sums the quotient for each set of successive wheels and this sum is directly proportional to the total length of the train.
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公开(公告)号：US3558876A
公开(公告)日：1971-01-26
申请号：US3558876D
申请日：1968-10-16
Applicant: SERVO CORP OF AMERICA
Inventor： TILLMAN LEONARD , GLAZAR ARTHUR J
CPC classification number: G01N29/12 , G01N2291/2696
Abstract: A railroad wheel defect-detecting device is described. An accelerometer senses the vibrations induced in a test rail by a railroad wheel traveling thereon. The test rail is vibrationally isolated from adjacent train tracks and ground vibrations to permit sensing of train wheel defects such as flat spots on wheels, loose couplings, dragging equipment and the like. Defects are recognized when the sensed vibrations exceed preselected maximum tolerable levels, said levels being fixed or automatically regulated to compensate for varying train conditions. Identification of each wheel having a defect is provided as well as optional car identification.
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