GB1242206A - Method for detecting circuit discontinuities - Google Patents
Method for detecting circuit discontinuitiesInfo
- Publication number
- GB1242206A GB1242206A GB4461/70A GB446170A GB1242206A GB 1242206 A GB1242206 A GB 1242206A GB 4461/70 A GB4461/70 A GB 4461/70A GB 446170 A GB446170 A GB 446170A GB 1242206 A GB1242206 A GB 1242206A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid crystals
- layer
- windscreen
- jan
- heating elements
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
1,242,206. Laminates. P.P.G. INDUSTRIES Inc. 30 Jan., 1970 [31 Jan., 1969; 31 Dec., 1969], No. 4461/70. Heading B5N. [Also in Division G1] A lamina structure 15, Fig. 2, comprising a layer of cholesteric-phase liquid-crystal material 17 sandwiched between two flexible transparent plastics layers 16, 18 is temporarily fixed to a windscreen G, Fig. 1, by an adhesive layer 19, so that defective heating elements 12 embedded in, or on the surface of, the windscreen, can be located-operative heating elements 11 causing a colour change in the liquid crystals. Preferably the liquid crystals have a colour range of from 20 to 30 C. which can be achieved by using appropriate mixtures, for example of cholesteryl myristate and cholesteryl butyrate. Alternatively, in order to cover a large temperature range, the layer of liquid crystals may consist of strips of different liquid crystal material having different temperature ranges.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79545469A | 1969-01-31 | 1969-01-31 | |
US88948669A | 1969-12-31 | 1969-12-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1242206A true GB1242206A (en) | 1971-08-11 |
Family
ID=27121620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4461/70A Expired GB1242206A (en) | 1969-01-31 | 1970-01-30 | Method for detecting circuit discontinuities |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS4811190B1 (en) |
BE (1) | BE745228A (en) |
DE (1) | DE2003474A1 (en) |
FR (1) | FR2029798A1 (en) |
GB (1) | GB1242206A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2197109A (en) * | 1986-09-17 | 1988-05-11 | Liquid Crystal Devices Ltd | Laminated product incorporating thermochromic liquid crystal material |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51109151U (en) * | 1975-02-24 | 1976-09-01 | ||
JPS51109355A (en) * | 1975-03-22 | 1976-09-28 | Kotobuki Kogyo Kk | TOKYO KYUSOCHI |
-
1970
- 1970-01-27 DE DE19702003474 patent/DE2003474A1/en active Pending
- 1970-01-30 JP JP45007822A patent/JPS4811190B1/ja active Pending
- 1970-01-30 FR FR7003346A patent/FR2029798A1/fr not_active Withdrawn
- 1970-01-30 BE BE745228D patent/BE745228A/en unknown
- 1970-01-30 GB GB4461/70A patent/GB1242206A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2197109A (en) * | 1986-09-17 | 1988-05-11 | Liquid Crystal Devices Ltd | Laminated product incorporating thermochromic liquid crystal material |
GB2197109B (en) * | 1986-09-17 | 1990-09-12 | Liquid Crystal Devices Ltd | Gb8721762.6roduct incorporating thermochromic liquid crystal material |
Also Published As
Publication number | Publication date |
---|---|
JPS4811190B1 (en) | 1973-04-11 |
FR2029798A1 (en) | 1970-10-23 |
DE2003474A1 (en) | 1970-10-01 |
BE745228A (en) | 1970-07-30 |
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