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Патент USA US2127349

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A118“ , 16, 1938.
e. ‘BOULARD
2,127,349
HAIR CURLER
Filed May 20, 19.37
A? f‘ . yé,
INVENTOR
BY
£2
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QRTTZZNEYJ
Patented Aug. 16, 1938
. . ,. 2,127,349
it?
UNITED STATES PATENT orFicE ,
2,127,349
HAIR CURLER
Gabriel Boulard, Paris, France
Application May 20, 1937, Serial No. 143,643
9 Claims.
(Cl. 132—33)
This invention relates to a. hair curler that is
of the type that is used for permanently waving
hair. By this invention the hair is heated in
such close proximity to the bulb of a thermometer
that the thermometer responds promptly to the
temperature which the hair reaches and thereby
makes provision for enabling the operator to
avoid overheating the hair either by observing the
position of the mercury column in the stem of the
10 thermometer or by having the mercury column
in this stem automatically cutoff the heat that
is being applied to the hair.
The invention will be understood from the de~
scription in connection with the accompanying
1.5 drawing, in which Fig. 1 is a side View of an illus
trative embodiment of the invention; Fig. 2 is
a similar view taken at right angles to Fig. 1; Fig.
The bulb l3 ‘of the thermometer that is used
in this device consists in part of the smaller
diameter portion of the glass tube 1 with the end
of this bulb made up of a conically shaped closure
member l4 that may be fused or otherwise secure 22.5
ly attached to the inside surface of the tube 1.
The upper end of the bulb l3 terminates in a
somewhat similar member 15 which is, however,
provided with a hole at the center and is at
tached there to a hollow stem that is provided 10
with a spiral portion l6 and a straight portion
I1 into which the mercury rises when the bulb is
heated, the upper portion of the mercury column
being visible through the opening 9 in the sleeve
1. The mercury in the bulb is indicated by 19 and 15
upon being heated rises in the capillary hole I8 of
the stem of the bulb, which is graduated in a
3 is a longitudinal section along the line 3—-3‘ of
Fig. 2; and Fig. 4 is a section along the line 4-4
20 of Fig. 3.
In the drawing, reference character I indi
cates a glass tube that is adapted for having a
lock of hair wound thereon which is to be curled
or waved. This tube is of smaller diameter at
25 an intermediate portion, as. indicated at 2, where
the hair is wound upon it, and gradually in
creases in diameter on both sides of this smaller
portion. This tube 1 terminates at one end
thereof in a cylindrical portion 3 that is prefer
30 ably smaller in diameter than the diameter of
‘the largest part of this tube. The end of the
cylindrical portion is closed as indicated at 4
and the other end is closed as indicated at 5.
A metal band 6, that may be‘ corrugated trans»
35 versely if desired, is applied near the end 5 and
may be kept in place by any suitable sort of heat
electric wire plugs 23 and 24 that are provided 25
with binding screws 25 and 26 for attaching wires
21 and 28 thereto. These wires 21 and 23 pass
through holes in the handle I3 and stem II and
terminate in the capillary hole l8 in the stem I1
of the thermometer, as indicated at 29 and 30 30
respectively, these wires being sealed in place
where they pass through the wall of the stem. A
plate 3| is provided in the portion 3 of the tube
l and transverse lines 32, 33 and 34 are provided
tacts with the shoulder joining the cylindrical
on this plate in position to be visible through the 35
window 9. This plate is installed behind the
stem [1 and the lines 32, 33 and 34 indicate the
temperature ranges within which the tempera
ture should be while the device is operating. Line
34 is preferably made red to warn the operator 40
that the temperature is dangerously high. The
portion 3 to the main portion of the tube l is
terminals 29 and 33 are located so that when
made in the form of a band 8 that may be cor
the mercury rises in the stem to the danger
point a circuit is closed between the wires 21 and
28. The terminals 22 are adapted to receive a 45
plug of a circuit (not shown) of a well known sort
resisting cement.
‘
A metal sleeve 1 surrounds the cylindrical por
tion 3 of the tube 1 and its inner end that con
40
suitable manner.
A cap 20 having one end dove-tail shaped ?ts
into a corresponding recess in the handle Ill and 20
a screw 21 holds this cap normally in place. Semi
circular recesses 22 are provided in the contacting
faces of the cap 23 and handle 10 for receiving
rugated transversely if desired. The sleeve 1 is
cemented to the cylindrical portion 3 by any suit
45 able heat resisting cementitious material and a
Window or opening 9 is provided in this sleeve 1
for a purpose to be described.
A handle I0 of insulating material, which may
be somewhat oval shaped in transverse section, is
provided with a stem II which extends into the
sleeve 1 and may contact with the end 4 of the
portion 3. This handle l0 may also be cemented
in the sleeve 1 by suitable cementing material.
A pin 12 is also passed through the sleeve 1 and
55 stem II to keep the parts assembled.
in which a source of current and an alarm is
provided, so that when the mercury rises enough
in the stem II to close the contact between the
wires 21 and 28, the alarm will be sounded,
I claim:
.
l. A hair curler comprising a hollow portion
of rigid heat resisting material for having hair
wound thereon, a thermometer bulb in said hollow
portion, and a sleeve for supporting said hollow
2
'
2,127,349
portion and surrounding a portion of the stem
of said thermometer.
2. A hair curler comprising a hollow portion
of rigid heat resisting material for having hair
Wound thereon, a thermometer bulb in said hol
low portion, a sleeve for supporting said hollow
portion and surrounding a portion of the stem
of said thermometer, and a handle of insulating
material for said sleeve.
3. A hair curler comprising a hollow portion
for having hair wound thereon, a thermometer
bulb in said hollow portion, a sleeve for support
ing said hollow portion and surrounding a por
tion of the stem of said thermometer, a handle
of insulating material for said sleeve, electric ter
said tube constituting the wall of the bulb of said
thermometer.
6. A hair curler comprising a glass tube and
a thermometer having a portion of the wall of
said tube constituting the wall of the bulb of said
thermometer, the stem of said thermometer being
spiral for a portion of its length.
7. A hair curler comprising a glass tube and
a thermometer having a portion of the wall of
said tube constituting the wall of the bulb of said
thermometer, the stem of said thermometer being
spiral for a portion of its length, and electric
Wires terminating inside of said stem.
8. A hair curler comprising a glass tube and
a thermometer having a portion of the wall of
minals in said handle and electric wires from said
said tube constituting the wall of the bulb of said
terminals extending into the inside of said stem.
thermometer, and a metal sleeve surrounding an
4. A hair curler comprising a hollow portion
, other portion of said glass tube.
for having hair wound thereon, a thermometer
9. A hair curler comprising a glass tube and
bulb in said hollow portion, a sleeve for support
a thermometer having a portion of the wall of 20
ing said hollow portion‘ and surrounding a por
said tube constituting the wall of the bulb of said
tion of the stem of said thermometer, a handle
of insulating material for said sleeve, electric ter
minals in said handle and electric wires from said
terminals extending into the inside of said stem
at di?'erent points longitudinally thereof.
5. A hair curler comprising a glass tube and
a thermometer having a portion of the Wall of
thermometer, the stem of said thermometer being
spiral for a portion of its length, and a metal
sleeve around said stem provided with an open
ingv through which a portion of said stem is
visible.
GABRIEL BOULARD.
25
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