Improvements in Instruments for Sprinkling or Diffusing Powder for Medical or other Purposes.
Year: 1893

page_text: Date of Application, 27th Mar., 1893-Accepted, 6th May, 1893
COMPLETE SPECIFICATION.
Improvements in Instruments for Sprinkling or Diffusing Powder
for Medical or other Purposes.
I, MYLIUS EHRHARDT, of 7 Hollmann Strasse, Berlin, in the Empire of
Germany Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
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"
My invention refers to powder-blowers such as are used by surgeons for
sprinkling or diffusing iodoform and other powders. With those powder blowers
hitherto in use, it has been necessary upon every occasion of their employment
that the tube should be previously filled with the quantity of powder to be blown
therethrough; and scarcely any of the powder holders hitherto in use have ever
been capable of being entirely emptied. By my invention, when the holder
(which is generally made of glass), which is to contain the powder, is once filled,
the instrument may be used a number of times before requiring to be refilled,
whereby a considerable saving of time and labour in filling the instrument is
effected; and also the supply of powder placed in the holder can be blown out to
the last grain, while the instrument can be used with greater facility by the
operator and with advantage to the patient.
My invention will be readily understood by reference to the accompanying sheet
of drawings illustrative thereof, wherein
Figure 1 shews the instrument in use, and Figure 2 represents a sectional view
of the same instrument on a larger scale.
A is the ordinary collapsible ball from which an air tube B extends in a direct
line through the powder holder and terminates at C with an open end as shewn in
the drawings immediately opposite the internal aperture of the outlet tube D.
E is the powder holder, having an opening closed by plug F to allow of a supply
of powder being placed in the said holder. When the apparatus is required to be
used, the ball A is compressed by the hand, causing a current of air to pass forcibly
through tube B and by C, driving before it such powder as rests between C and
outlet tube D, through said tube D and out at the nozzle thereof, to be sprinkled
where required. The supply of powder remaining in the holder E falls again
upon slight shaking, before the end C of the tube B, ready for the next sprinkling,
and so on until the holder is completely emptied.
The outlet tube D may be straight, or of bent form at the end, as shewn at
Figure 1.
I am aware that the air tubes have been heretofore extended into the powder
holders, but such tubes have been returned or bent backwards at the ends, or have
have been closed at the ends and formed with side apertures or have not practically
extended through the powder holder, therefore
Having particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
In instruments for sprinkling or diffusing powder for medical or other purposes,
the powder holder containing sufficient powder for several discharges thereof, in
combination with an air tube passing from the ball directly through the powder-
holder and terminating with an open end immediately opposite the aperture of

page_text: the outlet tube substantially as and for purposes hereinbefore described and
illustrated with reference to the accompanying drawings.
Dated this 27th day of March 1893.
BREWER & SON,
London and Leeds, Agents for Applicant.