U.S. patent number 4,398,183 [Application Number 06/144,097] was granted by the patent office on 1983-08-09 for detecting method and apparatus for permanent wave hairdressing.
This patent grant is currently assigned to Kyoritsu Electrical Works, Ltd.. Invention is credited to Akitoshi Ando.
United States Patent |
4,398,183 |
Ando |
August 9, 1983 |
Detecting method and apparatus for permanent wave hairdressing
Abstract
A method for detecting a condition of permanent waves during a
permanent wave hairdressing, by using a chemical liquid which makes
permanent waves and which produces a hydrogen sulfide gas at a
predetermined temperature, and by exposing a lead acetate test
paper to the hydrogen sulfide gas which changes colors to indicate
the condition of the permanent wave. An apparatus having a light
emitting diode detects the change in color of the test paper and
activates a buzzer when a predetermined change of color is
detected.
Inventors: |
Ando; Akitoshi (Itabashi,
JP) |
Assignee: |
Kyoritsu Electrical Works, Ltd.
(Tokyo, JP)
|
Family
ID: |
22507024 |
Appl.
No.: |
06/144,097 |
Filed: |
April 28, 1980 |
Current U.S.
Class: |
340/500; 116/207;
132/212; 340/514; 340/573.1; 340/632; 422/504; 436/183 |
Current CPC
Class: |
G01N
31/22 (20130101); G01N 21/78 (20130101); G01N
33/528 (20130101) |
Current International
Class: |
G01N
31/22 (20060101); G01N 33/52 (20060101); G08B
023/00 (); G01N 031/22 () |
Field of
Search: |
;340/500,501,514,573,586,588,589,632-634 ;132/7
;116/206-208,DIG.22,44 ;250/226 ;422/56 ;23/23R,232 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Crosland; Donnie L.
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak and
Seas
Claims
What is claimed is:
1. An apparatus for detecting a condition of permanent waves in
hair during a permanent wave hairdressing procedure which produces
hydrogen sulfide gas, comprising:
signal generating means;
a lead acetate test paper connected to said signal generating
means, said lead acetate paper changing color when exposed to said
hydrogen sulfide gas;
a sealable head cap having an attachment portion on an under
surface, said lead acetate test paper being attached to said
attachment portion formed on said under surface of said cap;
and
buzzer means connected to said signal generating means, said buzzer
means generating warning sounds when activated by said signal
generating means when said lead acetate test paper is changed into
a dark color of a predetermined constant density.
2. The apparatus claimed in claim 1, wherein said signal generating
means comprises a light generating portion and a light receiving
portion disposed on opposite sides of a slot which receives said
lead acetate test paper.
3. The apparatus claimed in claim 2, further comprising a clip for
holding said lead acetate paper in said slot.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a detecting method and an
apparatus for detecting a condition of waves in permanent wave
hairdressing.
Permanent wave hair is produced with hair curled on a number of
rods using tools and chemical liquid for waving in a cold manner or
otherwise in a hot manner. The condition of waves must be ensured
by locally rewinding the curl after a constant lapse of time, by
feeling with ones fingers, and by observation in either the cold or
hot prior art manner. Thus such an experimental technique requires
that a sixth sense be used. However, such conventional method are
disadvantageous in that the hair is insufficiently permed or
damaged due to errors in timing adjustment since the wave set
requires a constant lapse of time. These methods are ineffective
and it is troublesome to inspect the wave condition everytime, in
particular, in a crowded beauty saloon.
More specifically, there are many differences of the conditions of
the permanent waves due to individual differences of hair
properties, and even in one person there are delicate differences
in the time period required for suitable permanent waves due to
factors such as hair temperature, hair condition and health, a
temperature difference in seasons, a kind of chemical liquid for
waves and the like.
For this reason, the beautician must hairdress always in the
optimum condition preparing cards in which individual hair
properties, a required time for the wave set, and the like are
recorded.
SUMMARY OF THE INVENTION
In order to overcome the above noted defects, an object of the
present invention is to provide a simple and effective detecting
method and an apparatus therefor for mechanically and chemically
detecting the condition of permanent waves which are under the
optimum condition.
Another object of the present invention is to provide a novel
method and an apparatus therefor to solve troubles concerning the
required time for the completion of the permanent wave, which has
been considered intricate.
Also, according to the present invention, technical difficulties
inherent to the prior art such as a damage generated due to the
excessive lapse of time for the permanent wave and a poor
hairdressing due to insufficient time thereof are completely
eliminated.
These and other objects of the present invention will be apparent
by the following description and the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
A spirit and scope of the present invention will be apparent from
the appended claims. The present invention will be hereinafter
described on the basis of the specific embodiments shown in the
accompanying drawings; in which
FIG. 1 is a plan view of a head cap, showing an embodiment of a
detecting method according to the present invention;
FIG. 2 is an enlarged cross-sectional view of the attachment
portion of a lead acetate test paper P hereinafter simply referred
to as the "test paper P";
FIG. 3 is a perspective view of a detecting apparatus according to
the present invention;
FIG. 4 is a cross-sectional view of a signal generating device used
in the present apparatus;
FIG. 5 is a similar cross-sectional view of the signal generating
device to which the test paper P is attached by a clip member;
and
FIG. 6 is an embodiment in which the detecting apparatus is used
for a person.
DETAILED DESCRIPTION OF THE INVENTION
The present invention is applicable to the prior art manner of
using a desired amount of a wave chemical liquid during the
hairdressing, the winding operation of hair, the addition of heat
under a constant temperature by a heater in case of the hot type
permanent wave, and the like, all of which are used in a modern
beauty salon. For the adjustment of a constant period of time for
hairdressing, in the inner peripheral surface of a transparent head
cap 1 is formed a support 2 to which a strip-shaped lead acetate
test paper P is attached to as to be adapted to be in contact with
hair provided with wave chemical liquid when put on a person's
head. It is obvious that any attachment manner of the test paper to
the interior of the head cap 1 may be used. In FIGS. 1 and 2, a box
member 2a made of suitable elastic or rigid material extends
downward from the under surface of the head cap 1. The box member
2a has a hole 2b through which gas generated in the cap is
introduced, and the test paper P is secured suitably in the box 2a.
Reference numeral 3 denotes a rubber ring for sealing an inner
portion of the cap. The support portion 2 is so constructed so as
to contact surfaces of the test paper P bridged and supported in
the inner portion of the cap with the gas generated in the cap to
thereby prevent the leakage of the generated gas therefrom. With
such a construction, in the cold type, it may be used without any
additional job and in case of the hot type, it is heated at
constant temperature by using a heater (not shown). As time lapses,
due to the body temperature or rapidly due to the heater, a sulfur
component containing thioglycolic acid, which is a main component
of the wave chemical liquid to be used, is converted into a minute
amount of hydrogen sulfide gas and evaporates out of the hair. The
hydrogen sulfide gas chemically reacts with the test paper P causes
it to change from a brown color to a black color. According to
repeated experiments, it has been found that when the density
throughout the test paper P is changed into a dark black color the
wave is best formed. Therefore, the desired wave set is achieved in
a well known manner as indicated by the chemical maker, in view of
subjective conditions such as personal difference in the hair
property, the environmental condition such as a season and a room
temperature, and objective conditions such as a chemical liquid
amount and a heating temperature. Attention is not drawn to the
lapse of time and the optimum condition of the permanent waves is
automatically indicated when the test paper changes to a black
color, to thereby provide an effective and reliable detector.
Accordingly, in the present invention, it is not necessary for the
beautician to remove the rod clips on which the hair is wound after
a necessary lapse of time in the wave set as in the prior art, and
it is only necessary to confirm the optimum wave condition due to
the color of the test paper. As previously indicated, it changes to
a dark color which may be observed from the outside of the cap,
eliminating additional operations. This will provide an effective
method improving the prior art manner which has required intricate
hairdressing operations.
A detecting apparatus for embodying the above-described method will
be hereinafter described. The detecting device generally consists
of a signal generator and a buzzer. In FIG. 3, it is composed of
the signal generator 4, a slot 5 formed in a receiving portion, a
light emitting portion 6 of a light emitting diode, a light
receiving portion 7, an elastic clip 8, a lead wire 9, a buzzer
device 10 encasing an electric power supply, a buzzer and the like,
a switch 11, an indicator 12 and a cap 13. Thus the apparatus
comprises the signal generating means 4 and the buzzer means 10,
the test paper P is held at the slot 5 and fastened to the signal
generating means with the clip 8 so that the test paper P is in
contact with the hair within the cap 1 as shown in FIG. 6. When the
test paper P is changed into a dark color having a predetermined
density, the signal generating circuitry for the light emitting
diode is interrupted. Then, the buzzer means is operated in
response to the interruption to generate warning sounds. Completion
of the permanent wave is detected and indicated. Accordingly, the
condition of the wave is automatically announced with ease without
observation thereof.
Of course, the above-described apparatus is applicable to either
cold type and hot type, and there is only a difference between both
types in the lapse of time required for the change in color of the
test paper P.
The prior art technique depending on the beautician's experience
and sixth sense with respect to the required time for the permanent
wave is greatly improved or enhanced by the above proposed method
and apparatus enabling the combined chemical and mechanical
detection, thereby eliminating the additional jobs. In particular,
according to the present invention, troubles of the required time
for the completion of the wave, which has been heretofore
considered intricate are solved.
Also, according to the present invention, technical difficulties
inherent to the prior art such as a damage generated due to the
excessive lapse of time for the permanent wave and a poor
hairdressing due to insufficient time thereof are completely
eliminated.
* * * * *