Minelco Gmbh

John J Ambrozaitis

Robert D Hart

Robert Mazzamauro

An electromagnetic indicator capable of binary indication including a rotatably mounted semicircular flag assembly which can rotate between a first position ('set') and a second position ('fault') upon the receipt by the indicator of an electrical signal. A portion of the flag assembly is permanently magnetized and is magnetically latched in either the 'set' or 'fault' position by a magnetic latch which is preferably comprised of a bracket and core bar. The bracket has two ends which are positioned so that they are adjacent the magnetized portion of the flag assembly. The core bar is magnetically connected to an electromagnet and is also positioned adjacent a magnetized portion of the flag assembly. When the electromagnet is connected to the appropriate terminal of an electrical power source, the electromagnet generates a magnetic field, magnetizes the two ends of the bracket means and the core bar, and causes the flag assembly to flip from the 'set' position to the 'fault' position, or vice versa. After the electromagnet is disconnected from source, the flag assembly is magnetically latched in either the 'set' or 'fault' position by the magnetic attraction between the bracket, and the core bar on the one hand and the magnetized portion of the flag assembly on the other hand.

Electromagnetic flip-type visual indicator

A binary indicator for providing an indication of a normal or malfunction condition of equipment being monitored, the indicator having a magnetic latching and damping arrangement which ensures that the indicator functions properly under typical random high vibrational operating conditions. The latching and damping arrangement includes three auxiliary magnets which are located in close proximity to a rotating bar magnet to which a rotatable disc shaped indicator member is attached. The auxiliary magnets are positioned so that they prevent the rotating bar magnet from slipping out of the normal or 'set' position into the malfunction or 'fault' position or from slipping out of the 'fault' position into the 'set' position. Additionally, the auxiliary magnets dampen the movement of the rotating bar magnet when the bar magnet is reset to the 'set' position from the 'fault' position. The first auxiliary magnet is positioned in close proximity to a first end of the bar magnet when it is in the 'set' position. The second auxiliary magnet is positioned in close proximity to the same first end of the bar magnet when the bar magnet is in the 'fault' position. The third auxiliary magnet is positioned in close proximity to the second end of the bar magnet when it is between the 'set' and the 'fault' position but not exactly centered between these two positions.

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Waterbury, CT, United States of America

John J Ambrozaitis