Improvements in of connected with Appliances for Testing the Range of Heat in Furnaces, or Recording other such "High Temperatures...
Year: 1895

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Date of Application, 16th Feb., 1895
Complete Specification Left, 15th Nov. 4895 Accepted, 21st Dec., 1895
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PROVISIONAL SPECIFICATION.
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Improvements in of connected with Appliances for Testing the
Range of Heat in Furnaces, or Recording other such "High
Temperatures...
7
.
We GEORGE WATSON of 2" Woodsley "Terrace, Engineer, CHRISTOPHER
"WILLIAM JAMES of South View, Potternewton Lane, Engineer, and Richard
LAUNCELOT BULLOCK, of 22 Albion Street, Engineer, all of Leeds, in-the-
County of York, do hereby declare the nature of this invention to be as
follows:
1-1"
3.
:
:
suf This invention refers to a special mode or system of making the melting points
of metals and alloys serve as an index of temperatures. The bare principle of using
metals for this purpose is well known but, the old system of, introducing metal in
spots, or in comparatively large picces, into furnaces is a very awkward one-often
0.an expensive one; and in many cases say at, high temperatures-nigh well
impracticable.
.
The object of the invention is to provide an inexpensive, and yet accurate, mode
of arriving at the range of heat in furnaces, etc., by providing appliances; such as
will effect this by-an, easily read off, index, (this index, being practically self-
5.registering whilst in the furnace), which appliances. shall not depreciate by being
„laid by, and which shall be easily replaced in such parts, as are obliterated. of
previous tests. Gy
1
H
The mode system, or underlying principle,.on. which we base our plan or recurug
temperatures, is the exposure, to the heat in question, of a successively graduateu
which are systematically arrangeu
20. and temperature-stamped series of test pieces, w
to melt in their successive order up to the point reached by the temperatule i
question. The system also embraces the preparation of test pieces from com
paratively minute portions of the more valuable test metals, the temperatur
stamping being then carried out on an attached piece of less valuable and more
25 refractory material
j.
We prepare the metals or alloys in quantities, one grade at a time, caretuly
noting the melting point of the mass; then after preparing test pieces from this
casting, we retest for the second melting, and then stamp the whole of such test
pieces with the (second) melting temperature last found.
30When the metal is not costly we make the test pieces up into small discs, equares,
rods, plates &c.;, but when too costly.a portion only of the test piece is made from
the valuable metal, all the temperature stamping being carried out on a less costly
and more refractory metal or material, as mentioned before.
..
There are several ways in which the test pieces may be systematically slung
35. and exposed in the furnace, &c., one of which will serve as an example:
At the lower end of a bighly-retractory wire or other such sling, which will
afterwards hang down vertically in the furnace, we form, a head large enough to
¿support a series of test pieces (say dics) without any chance of their slipping over
and so past such terminal. Commencing with the lowest temperature-stamped
10 dise for the bottomost position we thread on the beforementioned wire à pile of
tést pieces, în a pre-arranged or known order, dividing each
with # layer of cardboard, thin, asbestos board, carbon, porcelain, or the like
checimens and guarding against huy
successive grades
of

page_text: Again refractory members may be hung in a raised position, as shown in cross-
section in Fig. 8, and there held until test pieces, which secure them, fuse and
allow them to fall. Fig. 9 is a plan in which 6 63, &c., are the refractory members
raised, and B, B, &c., are the test pieces which are here shown as pieces of wire.
extending from one member to another. As soon as the wire at B fuses-the arm b¹
drops, as shown in Fig. 10 which otherwise corresponds with. Fig. 8. In this.
arrangement the sling wires A keep the end -member H horizontal, whilst another
sling wire keeps the pivot or stem A in a like plane. .
:
Fig. 11 shows how a number of marked pieces may be suspended in position, by
beads or pin heads B1, B2, B3, &c., of test metals, ready for release according to
the rise of temperature. The wires to which the beads or pin heads are attached
may be protected by the stems of the plates, or pieces, and the upper ends may be-
looped inside the bar A-by, say, an-inner-rod-a, as-shown,-for-protection-from-the
heat, so as not to melt before the bead heads.
Fig.
12 is a cross section of ladder-like arrangement somewhat after the style.
of Fig. 4, but slung horizontally. B1, B2, &c., are the test pieces held in pockets F
in the sides of the frame A. Fig. 13 shows a test piece for such an arrangement.
as this, one end having been flattened to receive the marking; to admit such an-
end the pockets may be specially arranged as shown at F, F, &c., in Fig. 12, in
the half section to the right hand side.
Other varieties could be shown, but we are of opinion that none for high
ranges will prove so satisfactory as the simple sling with insulated discs as shown
in Fig..1.
In all cases A* denotes the slings, whether they be formed in wire or not, and.
A denotes points of attachment.
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 we make
no claim for the mere measurement of a temperature by noting the melting point
of a metal as this is well known; neither do we claim any thing or system which
calls for an examination of the metal exposed immediately it is removed from the
furnace and before it cools down, but what we claim is :-
1. The manufacture and use of our improved appliances for testing and.
registering the temperatures of furnaces and the like, substantially as described,
and shown on the drawings.
2. The special mode or system of manufacturing and using in series com-
paratively small testpieces with distinctive markings, or other equivalent sizes, or
shapes, for denoting melting points, with a view to their rapid melting-with.
accompanying registration-whilst temporarily slung in a furnace, or otherwise
exposed to a high temperature, substantially as described, and shown, with the-
object and for the purpose set forth.
3. The arrangement of a series of test-pieces to either fuse and fall asunder,.
or fuse and liberate other pieces, the effects, or self registration, of which are
permanently shown and therefore capable of being read off at any time after the
test.has been made, substantially as. described and shown, with the object and for
the purpose set forth.
4. The mode of suspending a series of testpieces in a furnace or the like in
close proximity to one another but insulated either by 'a material substance as in
Fig. 1, or isolated by mode of hanging at a distance apart, as in Fig. 5, etc.,.
substantially as described and shown, with the object and for the purpose set
forth.
1002
WM.
SNOWDON,
· 9 Old Bank Chambers, Leeds, Yorks, Agent for the Applicants.