Improvements in or relating to Instruments for Use in "Poker. Work" or Engraving upon Wood or similar Material by Burning.
Year: 1897

page_text: Date of Application, 26th Jan., 1897-Accepted, 27th Mar., 1897
Improvements in or relating to Instruments for Use in "Poker.
Work" or Engraving upon Wood or similar Material by
Burning.
A communication from ADOLF SCHNEIDER, of 7 Wittenbergerstrasse Dresden-
Striesen, in the Empire of Germany, Merchant.
I, ALFRED JULIUS BOULT, of 111 Hatton Garden, in the County of Middlesex
Chartered Patent Agent, 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 :-
The present invention relates to an instrument provided with an ether or other
voluble hydrocarbon heating device for the production of designs upon wood by
burning or charring commonly called poker work, in which such an arrangement is
made that the vapours of say sulphuric ether, produced by the heat of the hand of
the user and issuing from the point of the instrument and ignited there, heat a
wire loop to a red heat, so that the desired burnt in designs or pictures are
produced by the contact of said incandescent wire loop with the wood or other
material.
In the wood burning tools hitherto used a platinum wire has been heated by
means of a thin flame produced by a blower or vapour producer-actuated by hand,
in which methylated spirits or gas has been used. Such arrangement has the
disadvantage of necessitating the use of both hands of the operator, one hand
operating the rubber or other blower and the other guiding the tool, there being
two devices and as soon as a sufficient quantity of air ceases to be supplied to the
apparatus the flame goes out and the platinum wire loses its incandescence.
The present invention enables the operator to work very quickly and easily by
having a vapour producer always ready for action and connected directly to the
part to which the wire loop is secured. Sulphuric ether is found to be very
suitable as the heating or vapourising medium on account of it being capable of
vapourisation by the heat of the band.
Fig. 1 of the accompanying drawing illustrates the apparatus in sectional
elevation.
Fig. 2 being a plan and,
Fig. 3 a cross section.
The working of the device is as follows :-
A cylinder a closed on all sides, is filled to about half of its capacity with
The working of the device is as follows:-
A cylinder a closed on all sides, is filled to about half of its capacity with
sulphuric ether, the closing screw ở being removed for the purpose and the
admission of liquid ether into the tube c being prevented as by turning the pin or
valve stem d.
Having closed the cylinder a by replacing the screw cap b, a pin or valve stem d
forming the plug of a cock of the regulating device e is turned so that the vapours
produced in the cylinder a by the heat of the user's hand may enter into the piec.
These vapours escape into the atmosphere through an orifice of a nozzle g fitted
into or forming part of the front end of the pipe c and when lighted burn with a
blue flame, thereby causing the wire loop i secured to an interchangeable point or
carrier to become strongly incandescent.
If the tool is to be made inoperative, it is sufficient to turn the regulating
oil

page_text: device e which is limited by a pink and guided by a fork 1, through a quarter of a
revolution whereby the cock plug d will close the passage in the pipe.
By the described adjustment of the plug d the supply of vapour to the pipe c
may be regulated so as to obtain in the engraving or burning light or dark lines as
required
of any desired length.
In order to prevent the liquid sulphuric ether from entering into the pipe cduring
the time that the instrument is not in use, there is arranged on its lower surface a
foot m upon which the instrument may rest, and thus ensure a proper position of
the cylinder a.
Having now particularly described and ascertained the nature of the said
invention, as communicated to me by my foreign correspondent, and in what manner
the same is to be performed, I declare that what I claim is :-
1. An instrument for use in poker work, or engraving upon wood by burning,
consisting of an ether vaporising chamber and a vapour tube provided with a
perforated nozzle or point and a wire adapted to be rendered incandescent, as and
for the purpose described.
2. An instrument for use in poker work or engraving upon wood by burning,
consisting of an ether vaporising chamber provided with a tube having a regulating
valve, and having at its outer end a perforated nozzle or point and interchangeable
wire carrier, as and for the purpose described.
3. An instrument for use in poker work, or engraving upon wood by burning,
consisting of an ether vaporising chamber a cap b tube c valve d perforated nozzle
or point g, wire i, and carrier h, substantially as and for the purpose described.
Dated this 26th day of January 1897.
BOULT & WADE,
Agents for the Applicant.