IMPROVEMENTS IN CERTAIN ELECTRIC TELEGRAPHS, PART OF WHICH INVENTION IS APPLICABLE TO OTHER PUR- POSES
Year: 1865

page_text: PROVISIONAL SPECIFICATION left by Adam Millar at the Office of
the Commissioners of Patents, with his Petition, on the 5th April
1865.
I, ADAM MILLAR, Optician, residing at Number One hundred and fifty,
Grove Street, Camden Town, London, in the County of Middlesex, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN CERTAIN
ELECTRIC TELEGRAPHS, PART OF WHICH INVENTION IS APPLICABLE TO OTHER PUR-
POSES," to be as follows:-
Firstly, in means for communicating motion to shafts, pullies, or other
mechanical appliances having a motion of rotation, consisting of a modification
of an appliance known as "Huygens's endless chain" interposed at a convenient
position between the driving power and the shaft or pulley to be driven; the
modification of the endless chain consisting in preventing the chain from
slipping by means of weights acting on the chain on both sides of the shaft
or pulley, in addition to the weight which produces the motion of the shaft
or pulley, such means of communicating motion being applicable to instruments
for transmitting and receiving electric currents, and other purposes requiring
a regular motion.
Secondly, in correcting or compensating for the variations from the
proper
speeds or rates of motion of instruments for transmitting, and receiving electric
currents without retarding or accelerating the continuously-moving parts, by

page_text: communicating motions in any suitable manner to other parts of the instruments
in a direction backwards or forwards as regards the direction of the motion of
the continuously-moving parts.
Thirdly, in producing the correcting or compensating motions to which
the second part relates by means of electro-magnets or similar appliances,
and suitable gearing actuated by electric currents, which currents are addi-
tional to, or form part of the currents which produce the message.
Fourthly, in indicating at the transmitting or receiving stations the
variations from the proper speeds of the instruments by the non-regularity in
the actions produced by means of electric currents, or by the non-regularity
of periods of no action corresponding to periods of no current; such currents,
or periods of no current being produced at regular intervals as part of or
additional to the currents and periods of no current which produce the message.
Fifthly, in transmitting messages through one line wire by eans of proper
surfaces in the form of symbols or characters arranged in a row, and in
producing a copy of such row of symbols or characters at the receiving station,
the instruments for transmitting messages by such means, and for producing
a copy at the receiving station, are similar to the instruments having "five
conducting points" described in Bakewell's Specification, Number Twelve
thousand three hundred and fifty-two, dated the Second day of December,
in the year of our Lord One thousand eight hundred and forty-eight.
proper
"Sixthly, in transmitting messages through one line wire by means of
surfaces consisting of lines of various lengths arranged in one line, and in
producing the message at the receiving station in the form of symbols or
characters; in carrying out this part of the Invention the series of lines
arranged in one line.are made to produce a corresponding series of currents
by any of the usual methods, which currents produce markings or recordings
at the receiving station, arranged in the form of symbols or characters by
means of an instrument similar to that of the receiving station referred to in
the fifth part.