Magnetic Notes

Progress, Volume X, Issue 4, 1 December 1914, Page 145

Magnetic Notes

There are four main defects which may occur at the make-and-break mechanism on the end of the magneto: (1) When a machine is new the fibre

bush, supporting the right-angled piece may swell up, due to moisture, and so cause the points to remain permanently open ; (2) When the machine has been running for some time the same bush may become slack, and cause a short circuit in the primary; (3) The heel or rubbing piece of this same right-angled lever may be worn and require renewal ; (4) The platinum points at which the primary is broken may require adjustment, through wear, or they may require squaring up with a very fine file. After filing they should be again set so that the maximum opening is not more than one-fiftieth of an inch.