MECHANIC TRADES 
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Machines for writing, shorthand, composing, printing, 
numbering, stamping, effacing 
For description and use of these machines see the following numbers, under which 
the manufacture also may be clast if preferd: 652 Writing machines, typers; 
653 Shorthand; 655.2~.3 Printing; 667.3 Calico printing; 460 Engraving; 
775 Fotolithografy 
Nriting, shorthand and composing machines 
General questions 
Universal keyboard Ideal keyboard Manipulators 
Mekanical transmission 
Comprest air transmission; electric transmission 
Inking by ribbon; by pad 
Ordinary typewriters 
With hidden writing; with visible writing 
Machines with keyboards and separate levers: hidden writing 
With complete keyboard and single letter on a key 
“ combined “ “ 2 letters « « « 
[{4 « 3 
Machines with keyboards and separate levers: visible writing 
Subdivided like 681.6121 
Machines with keyboards and type wheels, segments or 
barrels 
Hand operated machines 
With type on cylinders 
® ° « disks 
“  % rule 
“ “frame 
Other kinds of writing machines with mekanical movement 
Machines with transmission by comprest air 
’ “ “ “ electricity 
Accessories of ordinary writing machines 
Tables, etc. 
Machines for special kinds of writing 
For embost caracters 
Writing machines for blind. See also 655.38 Printing for blind 
For conventional caracters 
Perforating machines 
For shorthand 
“ distance writing 
Telescriptor 
Writing and composing machines for printing