1114: Wheatstone bridge: an arrangement of four resistors, a source of
emf, and a galvanometer for DC measurements or something like an
earphone or other audio transducer for AC measurements. In use, three of
the resistances are known/calibrated, and the fourth is unknown. When
the bridge is balanced, the galvanometer reads zero or there is no sound
through the earphone, and the unknown resistance can be determined by
the ratios of the other three resistances.
"RicodJour" wrote: I live not too far from the Whitestone Bridge and it
looks _nothing_ like that.
Wheatstone bridge--Whitestone Bridge. Like the difference between "Fire"
The difference between "Ohms in the box" and "homes in the Bronx"
The difference between "electric resistances" and "erected instances"
The difference between "electric bridges" and "eclectic bridges"
The difference between "potential drops" and "precipitous drops"
The difference between "charge carriers" and "Charger carriers"
The difference between "Volts and Amps" and "bolts and ramps"
The difference between "commutator's resistance gauges" and "commuter's
I don't know the exact machinery involved but it's very similar to
several tools we used in mechanical typewriter/copier/adding machine/
timeclock repair. Every dimension including thickness and width was a
go/no go measurement so you could quickly check distances and see
what's bent or out of alignment. I can't tell how flexible the metal
is so I'm not sure whether that long arm sticking out would bend
easily, otherwise I'd say it would slide under or around something to
check a dimension.
If there's no name stamped on it, finding out what it's supposed to be
used on is lost unless you find somebody who actually used it. And
when I cleaned out my old tool kit last month I found a few that I
don't remember exactly what I did with 'em. Every manufacturer had its
own set of gauges and benders.
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