New or Improved Means and Devices for Indicating the Quantity of Liquid Contained in Lamp Reservoirs and other Receptacles.
Year: 1894

page_text: Date of Application, 13th Oct., 1894
Complete Specification Left, 13th July, 1895-Accepted, 5th Oct., 1895:
PROVISIONAL SPECIFICATION.
New or Improved Means and Devices for Indicating the
Quantity of Liquid Contained in Lamp Reservoirs and
other Receptacles.
We, GEORGE PRICE of 50 Brunswick Street, Stamford Street Clerk and
GEORGES JUSTIN JOSEPH LEGRAND of 343 Holloway Road, Engineer, both in
the County of London, do hereby declare the nature of this invention to be as
follows:-
.
Our invention has for its object to indicate the quantity of oil or other liquid
contained in lamp reservoirs and other receptacles by means of a revolving index
or pointer.
For the purposes of our invention we so arrange a float between guide plates or
rods or in a guide tube in the interior of the reservoir or receptacle that it cannot
revolve but may rise or fall with the rise and fall of the oil or other liquid
contained in said reservoir or receptacle. Extending through this float or through
a projection thereon is a spindle, mounted in suitable bearings and extending from
the bottom of the reservoir or receptacle to and through the top thereof. This
spindle is twisted or has a screw thread cut or formed upon it so that as the float
rises or falls said spindle will be revolved and thus indicate the position of the float
and consequently the quantity of oil or other liquid contained in the reservoir or
receptacle by an index or pointer secured to its upper end and moving over a
suitable dial secured to the exterior of the reservoir or receptacle..
. J
Instead of arranging the float to directly operate the spindle to which the index
or pointer is secured, it may be secured to one end of a rod whose opposite end is
secured to a horizontal spindle mounted to revolve in suitable bearings near the
top of the reservoir or receptacle, said spindle being geared by suitable gearing to
one end of a second spindle the opposite end of which projects through the top of
the reservoir or receptacle and carries the index or pointer. In this case the float,
moving with the liquid in the reservoir or receptacle turns the horizontal spindle
through the medium of the rod to. the end of which said float is secured, and this
movement is transmitted through the gearing to the index or pointer spindle..
1004
"
New or Improved Means and Devices for Indicating the
Quantity of Liquid Contained in Lamp Reservoirs and
other Receptacles.
We, GEORGE PRICE, late of 50 Brunswick Street, Stamford Street; but now
of 85 Weymouth. Terrace Clerk and GEORGES JUSTIN JOSEPH LEGRAND, of
343 Holloway Road, Engineer both in the County of London 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:
Our invention has for its object to indicate the quantity of oil or other liquid
[Price 8d:]

page_text: contained in lamp reservoirs or other receptacles, by means of a revolving index or
pointer.
For the purposes of our invention we so arrange a float between.guide plates or
rods, or in a guide tube in the interior of the reservoir or receptacle that it cannot
revolve, but may rise and fall with the rise and fall of the oil or other liquid
contained in said reservoir or receptacle. Extending through this float or through
a projection thereon is a spindle mounted in suitable bearings and extending from.
the bottom of the reservoir or receptacle to, and through, the top thereof. This
spindle is twisted or has a screw thread cut or formed upon it so that as the float
rises or falls, said spindle will be revolved and thus indicate the position of the float
and consequently the quantity of oil or other liquid contained in the reservoir or
receptacle by an index or pointer secured to its upper end, and moving over a
suitable dial secured to the exterior of the reservoir or 'receptacle.
Instead of arranging the float to directly operate the spindle to which the index
or pointer is secured, it may be secured to one end of a rod whose opposite end is
secured, to a horizontal spindle mounted to revolve in suitable bearings near the
top of the reservoir or receptacle, said spindle being geared by suitable gearing to
one end of a second spindle, the opposite end of which projects through the top of
the reservoir or receptacle and carries the index or pointer.
And in order that our invention may be more fully understood and carried into
practice, we will now describe the same with reference to the accompanying
drawings, of which
Figure 1 is a sectional elevation of a lamp with one form of indicator attached ;
Figure 2 an elevation of a modified form of indicator detached; and
Figures 3 and 4 sectional elevation and plan of a lamp with a further modified
form of indicator attached.
The indicator shown in Figure 1 consists of a tube a of square, triangular, oval,
or other section other than circular, arranged within the lamp reservoir at a
convenient point, and either vertically as shown or in a slanting or other convenient
position.
In this tube slidés a float b of metal, cork, wood, or any other suitable material,
which as the level of the liquid in the reservoir changes, alters its position
accordingly, owing to the fact that the tube is perforated at its upper and
lower ends.
This float 6 has passing through the centre of it a spindle c whose upper end
passes through the top of the reservoir and carries a pointér d arranged to move
over a suitable dial, and protected when desired by a transparent cover as shown.
This spindle is twisted or screw threaded and consequently, as the float cannot
revolve as it rises and falls, owing to the shape of the tube, the said spindle will be
revolted in one or the other direction and so indicate, by means of the pointer, the
exact amount of liquid contained in the reservoir.
The above described arrangement can, as will be perfectly understood, be
modified in many respects without departing from the general principle involved,
as for instance, instead of forming the screw thread on the pointer spindle, this
may be formed on or in the tube in the shape of slots or projections, the float then
turning and carrying the spindle with it whilst in some cases the tube may be
replaced by guide plates or rods, as shown in Fig. 2, these being either straight in
which case the spindle has a twist or coiled as the case may be.
In the modification illustrated in Figs. 3 and 4, the pointer spindle is operated
by the rise and fall of one or more floats as before, but instead of being mounted on
the said pointer spindle two of these are preferably used and these secured to the
end of a bifurcated lever e pivoted at fand gearing at its opposite end by bevel or
other gearing with the indicator spindle a.
To prevent the moveable parts of the indicator fouling the lamp wick and to
render the lamp as safe as possible, the wick tube His preferably prolonged to
such an extent that it nearly reaches to the bottom of the reservoir and is enclosed
in a tube g perforated at its lower end as shown in Figs. 1 and 3, and 4 or a

page_text: partition perforated or open at one or both ends, or wire netting or other
perforated material may be used for the purpose of separating the wick from the
revolving parts. When found desirable the pointer may be arranged to move in a
vertical or inclined plane instead of a horizontal one as shown, this being rendered
possible by the introduction of suitable bevel or other gearing or the like.
Having now particularly described and ascertained the nature of our said inven-
tion, we declare that what we claim is :-
(1) In a lamp reservoir or other receptacle, an index or pointer, the spindle of
which is operated by one or more floats arranged within said reservoir or receptacle
so that it or they may rise and fall as the quantity of liquid contained in said
reservoir or receptacle is increased or diminished.
(2) In a lamp reservoir or other receptacle, a device for indicating the quantity
of liquid contained therein and consisting of a float mounted upon a vertical spindle
carrying an index or pointer on its upper end and sliding within a tube or between
guide rods or plates, substantially as described and illustrated in the accompanying
drawings Figs. 1 and 2.
(3) In a lamp reservoir or other receptacle, a device for indicating the quantity
of liquid contained therein and consisting of a vertical spindle carrying an index or
pointer and geared by suitable gearing to one end of a lever having secured to its
opposite end one or more floats substantially as described and illustrated in the
accompanying drawings Figs. 3 and 4.
(4) An indicator for lamp reservoirs and other receptacles substantially as
described.
(5) In a lamp reservoir the combination of an indicator as above claimed with a
wick tube H extending nearly to the bottom of the reservoir and divided or
separated from the revolving parts of said indicator by a tube 9, a division plate or
the like, substantially as described.
Dated this Thirteenth day of June 1895.
GEORGE PRICE.
G. J. J. LEGRAND.