Improvement in Ventilating Tubes for Mines.
Year: 1898

page_text: I, PETER MOMMERTZ, Manager of Works, of Immermannstrasse, Düsseldorf,
in the German Empire, do hereby declare the nature of this invention to be as
follows:-
-
1
Hitherto ventilating tubes for collieries and other mines have usually been
made of sheet metal or of wooden boards, and were therefore either inconvenient
to carry, or required much time to put them together.
This invention has for its object, to provide a ventilating tube, which is light
and can be easily folded together for transport and rapidly mounted in its
proper place.
For this purpose I make the tube of canvas or other textile fabric combining
the necessary strength and flexibility, similar to a hose pipe, and stiffen it with
wires, hoops or circular metal frames arranged at suitable distances apart, or
with a helically coiled wire. The said fabric is impregnated, so as to render
it waterproof and impermeable or partly impermeable to air.
One or more of the hoops or stiffening frames may be provided with a ring
for suspending the tube, the rings of the different hoops being placed in a
straight line parallel with the axis.
Dated this 10th day of November 1898
Improvement in Ventilating Tubes for Mines.
I, PETER MOMMERTZ, Manager of Works, of Immermannstrasse, Düsseldorf,
in the German Empire, 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: -
Hitherto ventilating tubes for collieries and other mines have usually been
made of sheet metal or of wooden boards, and were therefore either inconvenient
to carry, or required much time to put them together.
This invention has for its object, to provide a ventilating tube, which is light
and can be easily folded together for transport and rapidly mounted in its
proper place.
For this purpose I make the tube of canvas or other fabric, combining
the necessary strength and flexibility, similar to a hose pipe, and stiffen it with

page_text: wires, hoops or circular metal frames arranged at suitable distances apart, or
with a helically coiled wire. The said fabric is impregnated, so as to render
it waterproof and impermeable or partly impermeable to air.
One or more of the hoops or stiffening frames may be provided with a ring
for suspending the tube, the rings of the different hoops being placed in a
straight line parallel with the axis.
In the accompanying drawing Fig. 1 is a side view of a ventilating tube em-
bodying my invention, Fig. 2 is a cross section along line A-B of Fig. 1,
and Fig. 3 represents the same tube after it has been folded or collapsed for
transport. (a) represents a canvas tube, b, b¹. . . represent the stiffening
rings, and c, c¹. . . the suspension rings.
Having now particularly described the nature of the said invention and in
what manner the same is to be performed, I declare that I claim :-
1. A collapsible ventilating tube chiefly consisting of a hose pipe of woven
fabric or other flexible material, and a series of wires, hoops or frames, or a
helically coiled wire adapted to stiffen the same, substantially as described.
2. A collapsible ventilating tube constructed substantially as described with
reference to the drawing.
Dated this 9th day of August 1899
FAIRFAX & WETTER,
Agents, 37 and 39, Essex Street, Strand, London.