AN APPARATUS INDICATING THE TIME IN MUSIC, AND WHICH CAN SERVE AS A DIAPASON
Year: 1859

page_text: LETTERS PATENT to François Philippe Janniard, of the Town of Beaune,
in the Department of the Côte d'Or, Empire of France, Householder, for
the Invention of "AN APPARATUS INDICATING THE TIME IN MUSIC, AND
WHICH CAN SERVE AS A DIAPASON."
Sealed the 22nd June 1860, and dated the 28th December 1859.
PROVISIONAL SPECIFICATION left by the said François Philippe Jan-
niard at the Office of the Commissioners of Patents, with his Petition,
on the 28th December 1859.
I, FRANÇOIS PHILIPPE JANNIARD, of the Town of Beaune, in the Depart-
ment of the Côte d'Or, Empire of France, Householder, do hereby declare
the nature of the said Invention for "AN APPARATUS INDICATING THE TIME
IN MUSIC, AND WHICH CAN SERVE AS A DIAPASON," to be as follows:-
This new apparatus or metronome consists of an ordinary pendulum com-
posed of a riband or tress, to one end of which a small cylindrical box made
of copper or other material is appended, acting as a weight. This cylindrical
box has an axle within it around which the riband rolls, so as to shorten or
lengthen the pendulum and obtain more rapid or slower oscillations, thus deter-

page_text: mining the movements indicated in music for the metronomic. The riband or
tress is indexed on either side, and to avoid the long duration and indecision
of the oscilliations, one side of the riband will show double strokes or lines
indicating that two oscillations are to be taken for one musical beat, and the
other face will carry figures by the side of the lines, indicating that each oscil-
lation represents one musical beat; at the other end of the riband is attached
a small metal plate, which is held in the hand and is the point of suspension
of the pendulum. To arrest the riband at different lengths a small interior
bolt moved by an exterior button presses the riband against the opening
in the cylinder and prevents further unrolling; the same bolt when the riband
is wound up passes into a small hole in the suspension plate and closes the
instrument. The axle of the cylinder is hollow and carries a small plate or
blade set in lead or pewter, by means of which the note "la" is obtained, and
consequently acts as a diapason..
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said François Philippe Janniard in the Great Seal Patent Office
on the 27th June 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, J, FRANÇOIS
PHILIPPE JANNIARD, of the Town of Beaune, in the Department of the Cote
d'Or, Empire of France, Householder, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of December, in the year of our
Lord One thousand eight hundred and fifty-nine, in the twenty-third year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said François Philippe Janniard, Her special licence that I, the said
François Philippe Janniard, my executors, administrators, and assigns,
or such others as I, the said François Philippe Janniard, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein ex-
pressed, should and lawfully might make, use, exercise, and vend, within
the United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "AN APPARATUS INDICATING THE TIME IN
MUSIC, AND WHICH CAN SERVE AS A DIAPASON," upon the condition (amongst
others) that I, the said François Philippe Janniard, my executors or adminis-:
trators, by an instrument in writing under my or their, or one of their hands.

page_text: and seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said François Philippe Janniard, do herebý
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Drawing hereunto annexed,
and forming part of this my Specification, and to the figures and letters of
reference placed thereon:-
7
The object of my Invention is the production of a new metronome, and my
apparatus consists in an ordinary pendulum composed of a tress or riband, to
the extremity of which is attached a cylindrical metal box serving as a weight;
within this box is an axle, around which the riband or tress winds, and thereby
the pendulum may be lengthened or shortened, making its swing more or less.
rapid, and thus determine the time as indicated in music for "Mactzel's "
metronome, the indications being marked on both sides of the riband; and to
avoid great increase in its length and long duration and indecision in its
oscillation, one of the two sides of the riband will be marked with ciphers
placed at the side of double lines, as an indication that two oscillations of the
pendulum must be taken for one musical beat, and on the other side of tho
riband figures are placed against single lines, indicating that each oscillation
m: rks one musical beat. At that end of the riband which is not fixed
to the axle is attached a small metal plate, to be held in the hand
and form the point of suspension of the pendulum. To arrest the tress or
riband at the divers lengths which may be necessary or desired I place a
small bolt or catch within the cylindrical box, which catch is worked by an
exterior button, and pressing the tress or riband against the opening in the
box prevents it unwinding or rolling up, and the same small catch when the
riband is rolled up passes into a small hole in the suspension plate, and thus
closes the instrument. The axle of the cylinder is bollow, having within it a
small metal plate set in lead or other suitable material, the effect of which is,
that on blowing into the cylinder, the note "la" is obtained, and thus the
instrument also serves as a diapason.
In the accompanying Drawing A represents the cylindrical box; B, the
tress or riband on which the indications are marked; C, the small suspension
plate; D, the catch or bolt; and E, the arrangement forming the diapason.
Having now described the nature of my Invention, and the means by which

page_text: I carry it into practical effect, I would have it understood that I do not confine
myself to the precise construction herein set forth; but I claim the exclusive
use of metronomes based upon the same principles as the apparatus above
described, and of the combination of the metronome with the apparatus
serving as a diapason.
In witness whereof, I, the said François Philippe Janniard, have here-
unto set my hand and seal, this Twentieth day of June, in the year
of our Lord One thousand eight hundred and sixty.
Witness,
T. DELETTRE,
à Beaune,
FRANÇOIS PHILIPPE JANNIARD. (L.S.)
(Côte d'Or,) France.