An Improved Blowing Appliance or Device.
Year: 1891

page_text: Date of Application, 20th Nov., 1891
Complete Specification Left, 11th July. 1892-Accepted, 13th Aug., 1892
An Improved Blowing Appliance or Device.
A communication by AUGUST KRAUSHAAR, of Hanau-on-the-Main, in the Empire
of Germany, Court Instrument Maker.
1, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, and 323, High Holborn, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to an appliance or device which is mainly intended for
removing dust from articles which, without such appliance, would have to remain
undusted, or at least the dusting of which would be attended with great difficulties.
It is especially suitable for removing the dust from musical instruments, such as
pianos, harmoniums, organs and the like.
The apparatus hitherto employed for this purpose, mostly simple bellows, have
many and important drawbacks, owing to which their use was much restricted.
For instance, an ordinary bellows cannot be employed in all places, if only owing
to its shape. Bellows are, further, difficult to handle so that the blast of air
coming from them shall exactly reach the place which is to be cleansed of dust.
This evil is especially prominent in the case of the finer stringed instruments
which lose their correct tone through the contact of the nozzle with the strings of
the instrument when bellows are used.
The new dust removing appliance or device consists essentially of a cylinder of
wood, papier maché or even metal, of a piston and of a cover provided with an exit
nozzle. The valves, through which the air emerges when the piston is drawn out,
are arranged on the inside of the cylinder cover. The piston is solid, and is
surrounded by a soft leather washer, which projects a little beyond the solid piston.
Various means may be employed so that the leather may fit accurately to the walls
of the cylinder, and thereby as complete an air-tight travel of the solid piston in
the cylinder as possible be effected. For instance, a stiff felt ring is fitted in the
end of the leather, which projects over the solid piston, and thereby the leather is
pressed against the walls of the cylinder. The same result may be attained by
inserting, in the leather ring, a ring of papier maché, wood or metal, composed of
one or more parts, which is forced apart by means of springs. Finally, an india-
rubber ring, inflated with air, may be inserted in a groove formed in the solid piston
by means of which the leather is pressed against the cylinder walls. By means of
these arrangements, the piston is caused to fit very tightly within the cylinder walls.
The cylinder cover, with the exit nozzle, may also be so formed that the exit valves
lie in the walls of the nozzle. The valves may be arranged either on the cover
provided with this nozzle or at suitable points on the side or in the solid piston
itself, such differences being immaterial as regards the action of the appliance or
device. The upper cover of the appliance or device is perforated, and forms a
guide for the piston rod, a pin on the latter preventing too great an upward move-
ment of the piston in the cylinder, and it also guards against any bending of the
piston in the cylinder when the former is fully drawn out.
Dated this 19th day of November 1891.
WM. P. THOMPSON & Co.,
Agents for the Applicant

page_text: A. communication by AUGUST KRAUSHAAR, of Hanau-on-the-Main, in the Empire
of Germany, Court Instrument Maker:
I, WILLIAM PHILLIPS. THOMPSON F.C.S. M.I.M.E. of the. Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6 Bank Street,
Manchester both in the County of Lancaster, and 323 High Holborn in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
This invention relates to an appliance or device which is mainly intended for
removing dust from articles which, without such appliance, would have to remain
undusted, or at least the dusting of which would be attended with great difficulties.
It is especially suitable for removing the dust from musical instruments, such as
pianos, harmoniums, organs and the like.
The apparatus hitherto employed for this purpose, mostly simple bellows,, have
many and important drawbacks, owing to which their use was much restricted.
For instance, an ordinary bellows cannot be employed in all places, if only owing
to its shape. Bellows are, further, difficult to handle so that the blast of air
coming from them shall exactly reach the place which is to be cleansed of dust.
This evil is especially prominent in the case of the finer stringed instruments
which lose their correct tone through the contact of the nozzle, with the strings, of
the instrument when bellows are used.
On the accompanying drawings ;-
Figure 1 is a longitudinal section of a complete apparatus';
Figures 2, 3, 4 and 5 modifications.
The new dust-removing appliance or device consists essentially of a cylinder A
of wood, papier maché or even metal, of a piston B and of a cover C provided with'
an exit nozzle G. The valves H, through which the air enters when the piston B
is drawn out, are arranged on the inside of the cylinder cover. The piston B is
solid, and is surrounded by a soft leather washer D; which projects a little beyond
the solid piston. Various means may be employed so that the leather D may fit
accurately to the walls of the cylinder A, and thereby as complete an air-tight
travel of the solid piston in the cylinder as possible be effected. For instance, a
stiff felt ring E, Figure 2, is fitted in the end of the leather D, which projects over
the solid piston, and thereby the leather is pressed against the walls of the cylinder.
The same result may be attained by inserting, in the leather ring D, a ring F,,
Figure 3, of papier maché, wood or metal, composed of one or more parts, which is
forced apart by means of springs N. Finally, an india rubber ring P, Figure 4,
inflated with air, may be inserted in a groove formed in the solid piston by means
of which the leather D is pressed against the cylinder walls. By means of these
arrangements, the piston is caused to fit very tightly within the cylinders walls.
The cylinder cover, with the exit nozzle G, may also be so formed that the inlet
valves H lie in the walls of the nozzle, as shown in Figure 5. The valves, H' may
be arranged either on the cover C provided with this nozzle G'or at suitable points
on the side or in the solid piston B itself, such differences being immaterial as
regards the action of the appliance or device. The upper cover J of the appliance
or device is perforated, and forms a guide for the piston rod K, a pin L on the
latter preventing too great an upward movement of the pistonin. the 'cylinder, and
it also guards against any bending of the piston in the cylinder when the former is
fully drawn out.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. An improved blowing appliance or device consisting of a cylinder having a
nozzle at one end supplied with inlet valves and a perforated cover at the other end
through which passes a rod carrying a piston, said piston being surrounded by a
leather washer projecting beyond the solid portion and adapted to be moved
backward and forward in the cylinder, substantially as and for the purposes
described.
2. In a blowing apparatus such as described in Claim 1, the application of a
piston B with a packing of any one of the varieties described and shown with
reference to Figures 2, 3 and 4.
WM. P. THOMPSON & Co.,
Agents for the Applicant.