An Improved Liquid Level Indicator, applicable to Oil Stoves, Lamps, and other Apparatus.
Year: 1892

page_text: Date of Application, 19th Dec., 1892
Complete Specification Left, 5th Apr., 1893—Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
An Improved Liquid Level Indicator, applicable to Oil Stoves,
Lamps, and other Apparatus.
ARTHUR SHELDON of 55 Witton Road Aston in the County of Warwick,
Commercial Traveller, and JOHN HENRY WOODROFFE of Church View, Witton
Lane Aston, in the County of Warwick Pattern Maker do hereby declare the
nature of this invention to be as follows :-
The improved indicator consists of index plate A to be marked to any desired
measure, or other sign required, with a float attachment B having a circular
motion working on a suitable fulcrum, thus giving motion to a pointer C moving
across index plate A thus shewing the quantity of liquid contained in any vessel
to which it may be attached. Our principal claim is that by the use of aforesaid
indicator, we can in the case of an oil lamp, stove or vessel burning oil, prevent
accidents from explosion as the indicator pointer C on index plate A will show
danger point namely when the aforesaid vessel is empty.
Dated this 17th day of December 1899
ARTHUR SHELDON.
JOHN HENRY WOODROFFE.
COMPLETE SPECIFICATION.
An Improved Liquid Level Indicator, applicable to Oil Stoves,
Lamps, and other Apparatus.
We, ARTHUR SHELDON of 55 Witton Road Aston in the County of Warwick,
Commercial Traveller, and JOHN HENRY WOODROFFE, of Church View,
Witton Lane, Aston, in the County of Warwick, Pattern Maker, 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, reference being had to the accompanying sheet of drawings
-
Fig. 1 is similar to the drawing which was referred to in the Provisional
Specification and Figs. 2 and 3 illustrate other forms in which the invention may
be applied.
This improved indicator consists of a plate marked with a scale and attached to
any convenient part of the oil stove or lamp and a hand or pointer working over
the scale by being actuated by a float upon the oil within the reservoir.
In Fig. 1A is an index plate to be attached to the lamp by the flange G and
marked with a scale to indicate any desired measure. B is a float of cork or other
suitable material attached to one end of the arm E which works upon the
fulcrum F thus giving a circular motion so that the falling of the float B when
the level of the oil in the stove or lamp reservoir is reduced will cause the
pointer Cattached to the other end of the arm E to move upon the index plate A
thus shewing the quantity of liquid contained in the reservoir.
Fig. 2 shews an index plate with ears H by which to attach it to the stove or
lamp and a slot S through which the pointer C works.
Fig. 3 shews a flat disc index-plate A' with a slot S¹ through which a pin P on
the arm El works with its end passing into a slot or groove in the raised portion
on the back of the pointer (C'). The arm (E¹) is bent or elbowed at (R) so that
the rising or falling of the float (B) will cause the pin (P) to travel in the
slot (S) moving with it the pointer (C) and causing it to turn upon its centre
pin at (V).

page_text: We do not confine ourselves to the exact forms of index plate or to the exact
modes shewn for moving the pointer thereon.
By the use of these indicators accidents from explosion may be to a great
extent prevented as the indicator will show when the oil vessel is becoming
empty.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
Indicating the level of the liquid in oil stoves lamps and other apparatus by
means of a float attached to an arm having a circular motion and actuating a
pointer.
Dated this 4th day of Anril 1802
HENRY F. TALBOT,
7, Cherry Street, Birmingham, Agent for the Applicants.