Description The apparatus consists of an electromagnet housed in a plastic moulded case supplied with a heavy steel sphere, an electromagnet unit with connections for an external timer and a platform unit containing a microswitch and terminals for the external timer. The electromagnet is primed when the stopping plate and solenoid are connected with the leads provided. The timer is triggered as soon as the ball release button is pressed. Retort stand and clamp not included! ( 605-059 )
