Movable Pole Shoe
Ford also issued a nonstandard starter, a direct-drive "movable pole shoe" design that provided cost reduction rather than electrical or mechanical benefits. This type of starter eliminated the solenoid, replacing it with a movable pole shoe and a separate starter relay. This starter operates as follows: The driver turns the key, activating the starter switch. A small electric current flows through the switch-type starter solenoid, closing the contacts and sending large battery current to the starter motor. One of the pole shoes, hinged at the front, linked to the starter drive, and spring-loaded away from its normal operating position, is swung into position by the magnetic field created by electricity flowing through its field coil. This moves the starter drive forward to engage the flywheel ring gear, and simultaneously closes a pair of contacts supplying current to the rest of the starter motor winding. Once the engine starts and the driver releases the starter switch, a spring retracts the pole shoe, which pulls the starter drive out of engagement with the ring gear.
This starter was used on Ford vehicles from 1973 through 1990, when a gear-reduction unit conceptually similar to the Chrysler unit replaced it.
Read more about this topic: Starter (engine), Electric
Famous quotes containing the words movable, pole and/or shoe:
“Temptation is an irresistible force at work on a movable body.”
—H.L. (Henry Lewis)
“Midwinter spring is its own season
Sempiternal though sodden towards sundown,
Suspended in time, between pole and tropic.”
—T.S. (Thomas Stearns)
“There was an old woman and she lived in a shoe,
She had so many children, she didn’t know what to do.
She crumm’d ‘em some porridge without any bread
And she borrowed a beetle, and she knocked ‘em all on the head.
Then out went the old woman to bespeak ‘em a coffin
And when she came back she found’ em all a-loffing.”
—Mother Goose (fl. 17th–18th century. There was an old woman who lived in a shoe (l. 1–6)