[GreenKeys] Teletype patents ..

Wed Jun 1 17:11:51 EDT 2011

The reason for the delay in issuing is clear once you see what it really
was:

Abstract:

1. A ciphering unit, and a
<http://www.patentgenius.com/patent/4155659.html> printing unit having type
bars movable to print he characters carried therby, an electromagnet
individual to each said type bar to select the respective type bar for
<http://www.patentgenius.com/patent/4155659.html> operation when such magnet
is energized; said ciphering unit comprising driving means adapted to
function in discrete cycles, a plurality of character keys, means operable
by any one of said keys to initiate a functioning cycle of said driving
means, an individual electric circuit closing means operable by each said
key, a plurality of individually movable elements establishing variable
random electric circuits equal in number to the number of said keys, each of
said circuits being connected between some one of said circuit closing means
and some one of said electromagnets, a
<http://www.patentgenius.com/patent/4155659.html> switch settable to connect
said circuits for flow of current therethrough in one direction for
enciphering and in the opposite direction for deciphering, means individual
to each said element to actuate such element sporadically to change said
circuits, means separately controllable by actuation of each individual
means to condition another of said individual means for operation, a common
swingable bail actuated by said driving means to operate such of said
individual means as are conditioned for operation, means controlled by said
driving means common to all said keys to hold a key depressed until a type
bar has been actuated and to prevent depression of any other key during that
time, means operated by all of said keys to effect operating connection
between said driving means and the instrumentalities actuated thereby, a
member movable to lock said keys against depression, means responsive to the
conditioning of said individual means to move said key locking member to the
locked position when none of said individual means is conditioned for
operation; said printing unit including means actuated to move said key
locking member to the locked position when said printing unit does not
operate in response to depression of a key, means operative when said switch
is in the enciphering position to insert an extra space after each fifth
character printed, means operable to lock said keys when a predetermined
number of groups of five characters have been printed, and means operable
simultaneously with the last-mentioned means to position the surface upon
which said characters are printed to print a new character.

Lester B Veenstra  MØYCM K1YCM

lester at veenstras.com

m0ycm at veenstras.com

k1ycm at veenstras.com

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-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Pete Lancashire
Sent: Wednesday, June 01, 2011 9:24 PM
To: greenkeys
Subject: [GreenKeys] Teletype patents ..

wonder if the author was still alive !!

Patent number: 4155659

Filing date: Feb 5, 1940

Issue date: May 22, 1979  <--- 39 YEARS later !!!

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