GB642877A - Improvements relating to apparatus for testing the dryness of hair - Google Patents

Improvements relating to apparatus for testing the dryness of hair

Info

Publication number
GB642877A
GB642877A GB2752248A GB2752248A GB642877A GB 642877 A GB642877 A GB 642877A GB 2752248 A GB2752248 A GB 2752248A GB 2752248 A GB2752248 A GB 2752248A GB 642877 A GB642877 A GB 642877A
Authority
GB
United Kingdom
Prior art keywords
resistance
hair
relay
dryness
probe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2752248A
Inventor
Denis Arthur Ball
John Adolph Sargrove
George Berrell Leather
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eugene Ltd
Original Assignee
Eugene Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eugene Ltd filed Critical Eugene Ltd
Priority to GB2752248A priority Critical patent/GB642877A/en
Publication of GB642877A publication Critical patent/GB642877A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor

Abstract

642,877. Determining physical qualities of materials. EUGENE, Ltd. Oct. 22, 1948, No. 27522. [Class 37] Apparatus for determining the degree of dryness of hair by measuring its resistance comprises two spaced electrodes 11, Fig. 1, forming a probe to be placed in the hair and connected in a circuit, Fig. 2, which indicates the resistance on a meter 16, or operates a warning device when the resistance reaches a predetermined value, or operates a relay 25 to open the heating circuit at a predetermined value of resistance. The resistance of the hair, together with resistances 19, 20 form a potentiometer for biassing the grid of valve 13 so that when the former is high the grid is approximately at cathode potential, causing the cathode current to be sufficiently large to energize relay 17, breaking one lead from the probe by contacts 22 and cutting off the main power supply by de-energizing relief relay 25 through contacts 24. A plurality of probes may be employed in parallel, and the meter 16 may be replaced by other forms of visual or audible indicators.
GB2752248A 1948-10-22 1948-10-22 Improvements relating to apparatus for testing the dryness of hair Expired GB642877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2752248A GB642877A (en) 1948-10-22 1948-10-22 Improvements relating to apparatus for testing the dryness of hair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2752248A GB642877A (en) 1948-10-22 1948-10-22 Improvements relating to apparatus for testing the dryness of hair

Publications (1)

Publication Number Publication Date
GB642877A true GB642877A (en) 1950-09-13

Family

ID=10260952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2752248A Expired GB642877A (en) 1948-10-22 1948-10-22 Improvements relating to apparatus for testing the dryness of hair

Country Status (1)

Country Link
GB (1) GB642877A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1038725B (en) * 1953-05-06 1958-09-11 Wella Ag Arrangement of the electrodes when displaying the dryness of hair
DE971990C (en) * 1955-06-15 1959-05-06 August Kolbe Tactile organ in the form of a hair curler or clip to be inserted into the hair to determine its dryness
DE1118938B (en) * 1956-03-05 1961-12-07 Wella Ag Device for scanning hair or fibers to determine their degree of dryness
US3300690A (en) * 1963-12-06 1967-01-24 Duval Corp Material level detection device
GB2147204A (en) * 1983-09-19 1985-05-09 Downey John H Moisture sensing hairgrooming device
US4877042A (en) * 1983-09-19 1989-10-31 Downey John H Dynamic hair grooming appliance
WO1997009898A1 (en) * 1995-09-13 1997-03-20 Philips Electronics N.V. Hair-care appliance with hair-moistness measurement by measuring the resistance of the hair, and circuit for converting the resistance value of a resistor into a measurement signal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1038725B (en) * 1953-05-06 1958-09-11 Wella Ag Arrangement of the electrodes when displaying the dryness of hair
DE971990C (en) * 1955-06-15 1959-05-06 August Kolbe Tactile organ in the form of a hair curler or clip to be inserted into the hair to determine its dryness
DE1118938B (en) * 1956-03-05 1961-12-07 Wella Ag Device for scanning hair or fibers to determine their degree of dryness
US3300690A (en) * 1963-12-06 1967-01-24 Duval Corp Material level detection device
GB2147204A (en) * 1983-09-19 1985-05-09 Downey John H Moisture sensing hairgrooming device
AU570726B2 (en) * 1983-09-19 1988-03-24 John H. Downey Moisture sensing grooming device
US4877042A (en) * 1983-09-19 1989-10-31 Downey John H Dynamic hair grooming appliance
WO1997009898A1 (en) * 1995-09-13 1997-03-20 Philips Electronics N.V. Hair-care appliance with hair-moistness measurement by measuring the resistance of the hair, and circuit for converting the resistance value of a resistor into a measurement signal

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