Improvements in or connected with Inlet Air Ventilating Tubes.
Year: 1891

page_text: Date of Application, 2nd June, 1891
Complete Specification Left, 29th Jan., 1892-Accepted, 5th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in or connected with Inlet Air Ventilating Tubes.
1, GEORGE BROWN, of 29 Sidney Street, Chapel Street, Salford, in the County
of Lancaster, Ventilator Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to inlet ventilators of the description known as
"Tobin" tubes and is designed with the object of applying to the flap or valve of
the ventilator a suitable indicator whereby it can be readily seen whether the
apparatus is open or closed.
It consists essentially of the combination with the valve or valve spindle of a
disc or plate inscribed with the words "open" and "shut" or others of similar
import and a hollow plate or cover with a slot or slit to display the words or marks
inscribed on the disc or plate.
In carrying out the invention the inlet tube is made in the usual way with a flap or
valve across the top, to the spindle of the valve outside the tube I affix a small
index plate or disc upon which are inscribed the words "open shut." This plate
is preferably metal, enamelled white, with the words inscribed in black letters though
it may be of any other colour or may be of brass with the letters cast or engraved in
it. The plate or disc is covered with a cover or casing in which is cut a slot through
which the indicator plate is exposed. The index plate is placed in such position
relative to the valve that when the valve is open the word "open" is displayed
through the slot and when closed the word "shit" is displayed therethrough.
Dated this 1st day of June 1891.
WM. P. THOMPSON & CO.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Inlet Air Ventilating Tubes.
I, GEORGE BROWN, of 29 Sidney Street, Chapel Street, Salford, in the County
of Lancaster, Ventilator Manufacturer, do hereby declare the nature of this inven
tion 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. inlet air ventilators of the description known as
"Tobin" tubes and is designed with the object of applying to the flap or valve of
the ventilator a suitable indicator whereby it can be readily seen whether the
apparatus is open or closed.
It consists essentially of the combination with the valve or valve spindle of a
disc or plate inscribed with the words "open" and "shut," or others of similar
import and a hollow plate or cover with a slot or slit to display the words or marks
inscribed on the disc or plate.
It will be fully described with reference to the annexed drawings.
Fig. 1. front elevation of "Tobin" ventilating tube, constructed with my
improvements attached thereto.
Fig. 2. front elevation of same with the cover or protector removed.
Fig. 3. sectional elevation.
The inlet tube A is made in the usual way with a flap or valve B across the top
mounted on a spindle C by which it is moved to open or close the ventilator.
To the spindle C, I affix a small index plate or disc D of any suitable shape upon
which are inscribed the words <
open,"
"shut." This plate is preferably metal,

page_text: enamelled white, with the words inscribed in black letters, though it may be of any
other color or may be of brass with the letters cast or engraved upon it.
The plate or disc D is covered with a cover or casing E in which is cut a slot e
through which the indicator plate is exposed.
Although I prefer to place the plate D and slot e below the spindle C and
knob Fit is evident that if desired they may be placed above them, and the
cover E be shaped to correspond therewith.
⋅
The index plate D is placed in such a position relative to the valve B that when
the valve is open the word "open" is displayed through the slot e and when closed
the word "shut" is displayed therethrough. As the valve is opened or closed
by the knob or handle F, the plate D, being affixed to the spindle C, moves at the
same time and indicates the position of the valve.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what !
claim is :-
[
22
The combination with the valve or valve spindle of an inlet air ventilating tube
of an index plate or disc inscribed with the words open "shut," and a hollow
plate or cover provided with a slot through which the words are displayed substan-
tially as described.
Dated this 28th day of January 1899
WM. P. THOMPSON and Co.,
Manchester, Liverpool, and London, Patent Agents.