AN IMPROVEMENT IN CHRONOGRAPHS
Year: 1883

page_text: LETTERS PATENT to Auguste Henchoz Arnold and Fritz Henchoz Huguenin
both of Geneva Switzerland for an Invention of "AN IMPROVEMENT IN
CHRONOGRAPHS
"
PROVISIONAL SPECIFICATION left by the said Auguste Henchoz Arnold
and Fritz Henchoz Huguenin at the Office of the Commissioners of Patents
on the 3rd May 1883.
AUGUSTE HENCHOZ ARNOLD and FRITZ HENCHOZ HUGUENIN both of Geneva
Switzerland "AN IMPROVEMENT IN CHRONOGRAPHS
"
According to this invention the minute indicator for chronographs is actuated
by the vertical action of the wheel of the indicator. And in order that our said
invention may be understood we will refer to the accompanying drawing. The
wheel E of the indicator carries a hand which indicates the number of minutes
that have elapsed during the observation this wheel also carries a heart shaped
cam d to enable the indicator to be set back to 0. The heart shaped cam D of the
chronograph carries a pawle which causes the wheel E to advance one tooth at
every turn of the centre wheel C but as this must only take place during the
period of observation and the setting back of the indicator to 0 must be effected
without the pawl e and the wheel E coming together. We bevil the hammer B of
the chronograph and the underside of the wheel E of the indicator in such manner
as to make the former lift the latter when it assumes the position shown in dotted
lines at B¹ to put the chronograph in motion whence it results that the wheel E
will advance one tooth at every turn of the centre wheel C.
The heart shaped
cam d and the hammer b used to set the minute band at 0 are also bevelled in
such manner that when the hammer B and b effect the setting of the hands at 0
the hammer b presses laterally on the heart shaped cam d at the same time causing
this latter and the wheel E to assume the position they occupied before being
lifted by the hammer B. This indicator may be applied to any system of
chronograph.

page_text: :
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Auguste Henchoz Arnold and Fritz Henchoz Huguenin in the
Great Seal Patent Office on the 3rd November 1883.
AUGUSTE HENCHOZ ARNOLD and FRITZ, HENCHOZ HUGUENIN both of Geneva
Switzerland "AN IMPROVEMENT IN CHRONOGRAPHS
"
This Invention refers to an improvement in chronographs with minute indicators
According to this Invention the minute indicator for chronographs is actuated
by the vertical action of the wheel of the indicator and in order that our said
Invention may be understood we will refer to the accompanying drawing. The
wheel E of the indicator carries a hand which indicates the number of minutes that
have elapsed during the observation this wheel also carries a heart shaped cam d
to enable the indicator to be set back to 0: The heart shaped cam D of the
chronograph carries a pawl e which causes the wheel E to advance one tooth at
_every turn of the centre wheel-C but as this must only take place during the period
of observation and the setting back of the indicator to 0 must be effected without
the pawle and the wheel E coming together. We bevil the hammer B of the
chronograph and the underside of the wheel E of the indicator in such manner as
to make the former lift the latter when it assumes the position shown in dotted
lines at B to put the chronograph in motion whence results that the wheel E
will advance one tooth at every turn of the centre wheel C, The heart shaped
cam d and the hammer b used to set the minute hand at 0 are also bevelled in such
manner that when the hammers B and b effect the setting of the hands at 0 the
. hammer b presses laterally on the heart shaped cam d at the same time causing
this latter and the wheel E to assume the position they occupied before being
lifted by the hammer B. This indicator may be applied to any system of
chronograph
Having thus described the nature and object of our said Invention we would
remark in conclusion that what we claim and desire to secure by the herein before
in part recited Letters patent is
A minute indicator for chronographs actuated by the vertical motion of the
wheel of the indicator substantially as set forth
In witness whereof we the said Auguste Henchoz Arnold and Fritz Henchoz
Huguenin have hereunto set our hands and seals this twenty seventh day of
October in the year of our Lord one thousand eight hundred and eighty three
S AUGUSTE HENCHOZ-ARNOLD (L.S.)
'