CERTAIN IMPROVEMENTS IN SHUTTER WORKERS
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Henri Adrien Bonneville at the Office
of the Commissioners of Patents on the 31st May 1881. A communication
by Frederick Deering Blake, of Brooklyn, New York, Merchant.
HENRI ADRIEN BONNEVILLE, of the British and Foreign Patent Offices, 18, Rue
de la Chaussée d'Antin, Paris, France, and 90, Cannon Street, in the City of
London, Patent Agent. "CERTAIN IMPROVEMENTS IN SHUTTER WORKERS."
A communication by Frederick Deering Blake, of Brooklyn, New York, Merchant.
This Invention relates to certain improvements in shutter workers, and consists
in the combination of a box or casing adapted to be fastened to the exterior of a
window, a cogwheel arranged within the box, a shutter arm fixed to the shaft of
the cogwheel, a spindle capable of being inserted into the sill of the window, a hand
crank, a pinion and a recessed wheel fixed to the spindle, the pinion meshing with
the cogwheel, and a spring detent engaging the recessed wheel in such a manner
that when the spindle is turned the shutter arm is moved to open or close the
shutter, while by the action of the detent and recessed wheel, the whole is locked
in any position to which it may be adjusted.
In order to render the hand crank least obstructive, it is desirable that the
crank shall take a horizontal position when the shutter is closed; and owing to the
varying conditions of windows, provision must be made for allowing the crank to
be properly adjusted at the time when the apparatus is put up.
This purpose is
accomplished by providing the pinion with teeth, the whole number of which does
not divide evenly the whole number of teeth of the cogwheel, as hereinafter more
fully set forth.
This Invention is illustrated in the accompanying Drawings, in which
Fig. 1 shows the apparatus in horizontal section applied to a window.
Fig. 2 is a vertical cross section.
Fig. 3 is an end view partly in section.
Fig. 4 shows the cogwheel.
Fig. 5 shows the pinion.
Similar letters designate corresponding parts. The letter A designates portion
of a window to which is connected a shutter B (shown in dotted outline) by
means of hinge joints, one of which is shown at C (Fig. 2). The letter D indicates

page_text: The box D is constructed with a lug E whereby it is fastened to the window
sill, its location being under the hinge C, and the cog wheel F is arranged within
the box, the axis of its shaft coinciding with the axis of the hinge joint. The
shaft of the cog wheel F has its bearings in the top and bottom of the box D, the
top being detachable, and the shaft extends through the bottom of the box, while
the shutter arm G is fixed to its projecting portion at one end in an appropriate
manner. The outer end or portion of this arm G is fastened to the shutter Bas
by a pivot a. The spindle I is made in two parts keyed together, and when the
apparatus is applied to a window these parts are inserted into the hole bored into
the window sill for this purpose from its opposite ends respectively, so as to meet
and engage each other intermediate of the ends of the hole. When the window is
built in a niche or next to the wall of an apartment, the spindle I is arranged in
an oblique position, as shown in Fig. 1, in order to bring the inner end thereof a
sufficient distance away from the end of the window as to permit the use of a
crank J of a large radius. The crank J is fixed to the spindle I at its inner end;
and when the spindle is placed in an oblique position the crank is bent as shown
in Fig. 1, whilst the pinion H is fixed to the spindle I at its outer end, where the
spindle extends into the box D, the pinion meshing with the cog wheel F in the
box. The recessed wheel K is fixed to the spindle I next to the hand crank J, its
recesses b being in the periphery thereof, and the detent L is attached to the
window sill in a suitable manner to engage the cog wheel. This detent L is
subjected to the action of a spring M having a tendency to throw the end c into
the recesses of the wheel. It will be readily understood that when the spindle I is
turned in one or the other direction, the shutter arm G shares it motion and the
shutter is opened or closed, whilst by the action of the detent L on the recessed
wheel the parts are locked in any position. By providing the wheel K with
recesses in contradistinction to teeth, it prevents the spindle I from turning in
either direction. The whole number of teeth of the pinion H is such that it does
not divide evenly the whole number of teeth of the cog wheel E, as for example,
the pinion may be formed with five teeth, and the cog wheel with twenty four
teeth. The result of this arrangement is, that after each complete revolution of the
cog wheel E, the crank J is brought into a different position or angle, and hence if
before the parts are permanently connected the cog wheel is revolved a sufficient
number of times, the crank can be made to take a horizontal position when the
shutter arm is in a correct position for closing the shutter, and it is obvious that
in this position of the crank it offers the least obstruction.