Dating regula cuckoo clocks
The weights are made of cast iron in a pine cone shape and the "cuc-koo" sound is created by two tiny gedackt pipes in the clock, with bellows attached to their tops.The clock's movement activates the bellows to send a puff of air into each pipe alternately when the timekeeper strikes.Some have musical devices, and play a tune on a Swiss music box after striking the hours and half-hours.Usually the melody sounds only at full hours in eight-day clocks and both at full and half hours in the one-day timepieces.Musical cuckoo clocks frequently have other automata which move when the music box plays.
Some musical quartz clocks also reproduce many of the popular automata found on mechanical musical clocks, such as beer drinkers, wood-choppers, and jumping deer.
During the call the double doors open and the cuckoo emerges as usual, but only on the full hour, and they do not have a gong wire chime.
The movement of the cuckoo in such clocks is regulated by an electromagnet that pulses on and off, attracting a weight, that acts as a fulcrum, connected to the tail of the plastic cuckoo bird, thus moving the bird up and down in his enclosure.
A cuckoo clock is typically a pendulum-regulated clock that strikes the hours with a sound like a common cuckoo's call and has an automated cuckoo bird that moves with each note.
Some move their wings and open/close their beaks while leaning forward, whereas in others, only the bird's body leans forward.