Time and Time-TellersBenson, James W., active 1857-1887
Philosophy
Time and Time-Tellers
Benson, James W., active 1857-1887
Clocks and watches
The recoil of the spring F has now brought the locking
pallet G to catch the tooth B, the escapement-wheel is thus again
stopped. But the stroke of the tooth upon the face of the ruby pallet D
has driven the balance on in its vibration till it is counteracted by
the tension of the balance spring, which brings it back again; in this
return vibration the lifting pallet E, by its curved back, pushes the
slender spring F before it, and passes it without affecting K, G, which
is stiff enough to remain unmoved by F, even when this strikes and rests
against it in recoiling. The wheel, therefore, continues locked on the
upright pallet G, and the vibration proceeds uncontrolled till the great
pallet is again brought round, and the balance spring again checks the
vibration, the above process being repeated. In this escapement,
consequently, part of one vibration in one direction, and the whole of
that in the other, is performed without the balance being in any way
under the influence of the motive power; while the parts are so
contrived that the impulse given by the tooth of the escape-wheel,
affects in a very slight degree the natural motion of the balance. It
can be easily understood that the lifting pallet E can pass the spring F
in one direction without moving K and G, while in the other it carries E
and G with it.
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| [Illustration: Compensation Balance.] |
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Public-domain text, read in full here on John Shaqi.
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