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perforator$59091$ - translation to ελληνικό
Chequewriter; Protectograph; Check perforator; Check protector
![A check perforator with a notice of 1889 and 1891 [[patent]] dates<ref name=protector/>](https://commons.wikimedia.org/wiki/Special:FilePath/Abbott Automatic Check Perforator.JPG?width=200 "A check perforator with a notice of 1889 and 1891 [[patent]] dates<ref name=protector/>")
perforator
n. τρυπητής, τρύπανο
Ορισμός
Perforator
An apparatus used in automatic high speed telegraphy for perforating
strips of paper. These are then used by drawing between a roller and
contact spring for making and breaking the telegraphic circuit for the
production of a record, such as the Morse record, at the distant
receiving station.
The perforated strip has different classes of holes punched in it to
represent dots or dashes. It is fed by machinery very rapidly, so that
the message is transmitted with the highest speed. Several operators may
simultaneously prepare the paper strips, and thus in conjunction with
its rapid feeding in the transmitter, far surpass the time of ordinary
direct transmission.
Fig. 257. PERFORATOR FOR
WHEATSTONE'S AUTOMATIC TELEGRAPH.
Perforators may be entirely mechanical but are sometimes pneumatic,
compressed air being used to operate them. The holes they make are on
different levels of the paper strip, as shown in the cut.
Fig. 257. PERFORATOR FOR
WHEATSTONE'S AUTOMATIC TELEGRAPH.
Perforators may be entirely mechanical but are sometimes pneumatic,
compressed air being used to operate them. The holes they make are on
different levels of the paper strip, as shown in the cut.
