Assertion: clock's mechanism | /r/MadeOf | heart shaped cam returnable
Facets:
value: to its zero position
type: OTHER
Source sentences:
text: This clock was made with a synchronising mechanism, consisting of a heart shaped cam returnable to its zero position by the operation of a roller bearing being pressed onto the cam by a solenoid, driven by an external signal relayed by land line from the GPO Chronopherat St.