sentences:  The news feeds were triggered by a microswitch which was attached to a Western Union clock and tripped by the minute hand of the clock.and then reset the stepping relay.Originally, 20-minute station identification was accomplished by a simulcast switch in the control booth for sister station WSJM, whereupon the disc jockey in the booth would announce "This is WSJM AM and... (then pressing the momentary contact button) ...WSJM-FM, St. Joseph, Michigan."