30-07-2020, 08:57 PM
A chummy horn button screws onto a 'spigot' threaded 11/16" x 32 tpi.
I don't have one myself but always kind of assumed all the button does is touch and earth an insulated wire, in which case the 'mechanism' would not consist of very much! The button is spring loaded.
I don't have one myself but always kind of assumed all the button does is touch and earth an insulated wire, in which case the 'mechanism' would not consist of very much! The button is spring loaded.