1
Bay E Estes III, Richard H Noens: Controller for fixed-time pull-in of a relay. Eaton Corporation, C H Grace, October 19, 1993: US05255152 (26 worldwide citation)

A controller for a relay controls the pull-in time of the armature of the relay by controlling the power applied to the relay coil. To determine the actual pull-in time, the time of closure of the contacts is sensed and the time at which power is applied to the coil is subtracted from it. The actual ...


2
Estes Bay Edward, Noens Richard Harold: Controller for fixed-time pull-in of a relay.. Eaton, February 24, 1993: EP0528357-A2 (5 worldwide citation)

A controller for a relay (R) controls the pull-in time of the armature of the relay by controlling the power applied to the relay coil (1). To determine the actual pull-in time, the time of closure of the contacts is sensed (37, 39) and the time at which power is applied to the coil (6) is subtracte ...