Improvements in Clinical Thermometers, Applicable also to other Thermometers.
Year: 1888

page_text: Date of Application, 17th May, 1888
Complete Specification Left, 16th Feb., 1889
Complete Specification Accepted, 6th Apr., 1889
PROVISIONAL SPECIFICATION.
Improvements in Clinical Thermometers, Applicable also to other
Thermometers.
I THOMAS PHILIP CHRISTOPHER CRAMPTON of 11 Cursitor Street in the County
of Middlesex Electrician, do hereby declare the nature of this invention to be as
follows:-
Clinical thermometers as at present constructed owing to their necessary delicate
construction are very liable to breakage in being handled. My invention is designed
to render such thermometers or ordinary thermometers capable to being subjected to
practically rough usage without such liability of breakage.
To this end I coat the entire glass tube and bulb excepting the part where the
scale is placed with any suitable metal or alloy. by means of electro deposition in
any suitable manner. The scale if desired can be marked on the metal sheath, or
I can deposit metal or alloy as above described on the bulb end only and protect
the remainder of the tube by an ebonite metal or other suitable sheath having a
slot in it for the scale. Or I can for the sake of strength use a ring of ivory or
other suitable non-conducting material having its sides undercut, placed round the
tube between the bulb and stem, and I deposit metal or alloy on either side of the
ring as before or I can deposit only on the bulb and fit a sheath as before described
on the other side of the ring.
I can also mount rubber or other resilient washers or buffers on the sheath to
further take off the effects of a fall of the instrument. If desired the sheath of
deposited metal at the bulb of the instrument may be thinner than elsewhere.
And if desired the other end may be made heavier than the bulb end so that in
falling the instrument will not alight on the bulb end.
Deted this 17th day of Nov 1888
POPPLEWELL, COLTON & Co.,
17 & 18, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: Improvements in Clinical Thermometers, Applicable also to other
Thermometers.
1 THOMAS PHILIP CHRISTOPHER CRAMPTON of 11 Cursitor Street in the county
of Middlesex, Electrician to hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described and ascertained
in and by the following statement:
--
Clinical thermometers owing to their necessarily delicate construction are very
liable to breakage whilst being handled and from other causes and my invention is
designed to render such thermometers or ordinary thermometers less liable to such
breakage and capable of withstanding some amount of rough usage.
In order to accomplish this I coat the entire glass tube and bulb excepting the part
on which the scale is shewn, with any suitable metal or alloy by means of electro-
de-position and in any convenient or desirable manner.
The graduations of the scale may if desired be marked on the metal casing or
covering.
I may deposit metal or alloy as before described on the bulb end only and protect
the remainder of the tube by an ebonite, metal or other suitable sheath slipped over
the stem and cemented or otherwise attached and having a slot in it through which the
scale may be seen, or, I can use a ring of ivory, ebonite or other suitable non-
conducting material mounted on the stem just above the bulb and having its sides
. undercut or overcut.
This ring embraces the tube and I deposit metal or alloy as before described on
both sides of the ring or on the bulb end of the tube only.
I may also mount rubber or other resilient washers or buffers on the sheath or on
the deposited metal so as to further lessen the danger of being broken by falling or
otherwise.
If desired the deposited metal or alloy at the bulb end of the instrument may be
thicker than elsewhere and the opposite end to the bulb may be made heavier so that
in falling it may in all probability alight on this weighted end, this applies more
particularly to thermometers for heavy or rough usage.
The accompanying sheet of drawings illustrates the manner of performing my
invention.
Figure 1. represents a clinical thermometer coated with metal by clectro-
deposition as before described A being the bulb and stem. I have shewn at B
the deposited metal marked or graduated on its edge forming a scale.
Figure 2. shows the bulb end A protected by electro-deposited metal and the stem
by an ebonite, metal or other sheath Caffixed thereto by suitable cement or otherwise
and slotted to shew the scale : In this form of thermometer a ring of ivory ebonite or
other suitable material having its sides undercut is placed on the glass near the bulb
and metal is electro-deposited on the bulb and the slotted sheath placed over the stem
and into the undercut part of the ring and cemented thereto, or I may deposit metal
on both the bulb and stem in place of the sheath

page_text: Figure shews another form of ring having its ends overcut and tapered leaving a
projection in the centre the metal or alloy being deposited over the whole thermometer
except the scale portion and over the tapered ends of the ring up to the central
projection.
Figure 4 shews a conical ring D mounted over the thermometer near the bulb end
and into which the sheath may fit.
My invention will be seen to be applicable to almost all kinds of thermometers.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1st. A thermometer having its bulb or bulb and stem except the portion on which
the scale is marked covered with metal or alloy deposited electrolytically as described.
2nd. A thermometer having its bulb covered with metal or alloy deposited
electrolytically and having its stem protected by a metal, ebonite or other sheath
affixed thereon or thereto substantially as described.
3rd. In clinical or other thermometers on the glass of which metal or alloy is
deposited by electrolysis the employment or use of a ring or ferrule undercut, overcut,
grooved, tapered or rebated, if desired, such as D. E or F of insulating material
whereby the deposited surfaces or the deposited surface and metal sheath are insulated
from each other substantially as described.
11
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1000
POPPLEWELL, COLTON & Co.,
Agents for the Applicant.