The telegraph manual: a complete history and description of the semaphoric, electric and magnetic telegraphs of Europe, Asia, Africa, and America, ancient and modern.

726 TELEGRAPH APPARATUS.
of the regulating key R g5, the arm b, insulated spring c", and
their connections, operating in the manner set forth.
V. IMPROVEMENT IN ELECTRO-MAGNETIC PRINTING TELEGRAPHS.
Patent(l April 22, 1856, by Albert J. Pariridg-c.
The branching of the circuit takes place between the pillar
p and the pin 1/. To the pillar p is pivoted a metal arm s.
IV.
2 irf 2
o 1 > S 4,., —--- =.1. y37 (Hi t "
1fiS =,j3 0~~i