Improvements in Vapour Cauteries for Pyrography or Poker Work.
Year: 1895

page_text: Date of Application, 12th Jan., 1895-Accepted, 2nd Mar., 1895
COMPLETE SPECIFICATION.
Improvements in Vapour Cauteries for Pyrography or Poker Work.
I, ALEXANDER KENNEDY MELVILLE, M.D., of 35 Mayfield Gardens, in the
City of Edinburgh, 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, which relates to vapour cauteries for use in the process of
pyrography or poker work, has for its object, by means of an attachment to such
apparatus, to disperse the smoke produced by the burning of the woodwork
operated on by the cautery or poker and obviate the annoyance caused to the
operator by the irritating effects of the smoke upon the eyes and upper respiratory
passages.
As represented by the accompanying drawing the invention consists in the
attachment to a cautery composed of the usual hand or foot bellows or air pump A,..
benzoline or other vapour reservoir B, platinum or other needle or poker C and
holder C¹ with connecting air tube D and vapour tube D', of an auxiliary air tube
or conductor E attached to the air tube D and furnished with a nozzle F adapted
to direct a jet of air towards the point of the needle C. By preference the
auxiliary air tube E is connected to the air tube D by a Y-piece or two way pipe-
one branch D of which passes as usual through the stopper of the benzoline..
bottle B and is provided with a nozzle or other means for vaporizing and trans-
mitting the benzoline or other vapour with the air forced through it, whilst the
other branch E¹ is adapted to convey only a portion of the air blast from the
bellows to and through the air tube E, a stop cock G being provided when desired
to cut off more or less of the air supply. The needle or point C of the cautery
is heated and its heat maintained in the usual way by means of the vapour
discharged upon it through the air and vapour tubes D, D', and as it is used to
operate on the wood-work the smoke emitted is dispersed by the air which is
conducted along the auxiliary air tube E to the nozzle F from which it is liberated
in a jet or stream and directed towards the point of the needle so as to impinge upon
and disperse the rising smoke. Thus by the use of the attachment described the
smoke produced by the burning of the wood in contact with the cautery point,..
instead of rising into the operator's face and causing pain and irritation in the eyes
and nasal passages, is driven by the current of air liberated from the auxiliary jet,
for some distance in a more or less borizontal direction, before it rises in the air,
which it is thus prevented from doing until it is clear of the operator's head,
thereby relieving the operator from all annoyance and irritation caused by the
smoke.
Having now 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 :-
1. The combination of parts constituting the improved vapour cautery substan-
tially as described with reference to the annexed drawings.
2. A vapour cautery furnished with means for directing an auxiliary air blast.
upon the smoke rising from the cautery point substantially as described.
111 1
100%
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62, St. Vincent Street, Glasgow, Agent for the Applicant..