This door chime is a successor model to earlier “Warbler” models. This chime was available with a circular brass colored insert in addition to the stainless version shown here. Marketed by Thomas Industries in the United States and manufactured by Friedland in England. A similar design was used for the Friedland Maestro. The cover of this chime is similar to another designed by John Doggart of Middlefield England in 1968 although the disk on this chime is recessed instead of floating above the case. This is accomplished by means of a mercury switch which enables gravity to momentarily interrupt the current allowing the plunger to recoil before repeating until the pushbutton is released. In the case of repeating chimes, the chime continues to strike both tone bars in rapid succession so long as the pushbutton is held. This late Mid-Century Door Chime has minimalist style.įriedland’s “Warbler” door chimes take their name from the vocal songbirds. Warbler Chimes sound a repeating tone for the main door.Īs with typical “ding-dong” doorbells, when the pushbutton is depressed, the solenoid is energized so the plunger strikes shorter tone-bar for the first note and then recoils by spring action to hit the longer tone bar for a the second note.
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