United States Patent [19] [ii] Patent Number: 4,636,698
Leclercq [45] Date of Patent: Jan. 13, 1987
[54] AUTOMATIC DEVICE FOR ACTUATION OF COMPONENTS TO CLEAN A MOTOR VEHICLE WINDOW
[75] Inventor: Jacques Leclercq, Roisel, France
[73] Assignee: Saint-Gobain Vitiage, Aubervilliers Cedex, France
[21] Appl. No.: 779,407
[22] Filed: Sep. 24, 1985
[30] Foreign Application Priority Data
Oct. 4, 1984 [FR] France 84 15249
[51] Int. CI.4 B60S 1/08
[52] U.S. CI 318/443; 318/444;
318/480; 318/DIG. 2; 15/250 C; 219/203
[58] Field of Search 318/443, 444, 480, DIG. 2,
318/483; 15/250 C, 250.05, 250.31, 250.12;
219/203, 522, 547
[56] References Cited
U.S. PATENT DOCUMENTS
3,621,356 11/1971 Kwan Chi On 318/480
4,132,881 1/1979 Ciarniello et al 15/250 C X
4,317,073 2/1982 Blaszkowski 318/480 X
4,355,271 10/1982 Noack 318/480
4,481,450 11/1984 Watanabe et al 318/480 X
4,495,452 1/1985 Boegh-Peterson 318/DIG. 2 X
FOREIGN PATENT DOCUMENTS
59-14563 1/1984 Japan 15/250 C
59-89250 5/1984 Japan 15/250 C
Primary Examiner—Bernard Roskoski
Assistant Examiner—Bentsu Ro
Attorney, Agent, or Firm—Pennie & Edmonds
[57] ABSTRACT
An automatic device for actuation of components for cleaning motor vehicle glass which includes a system for detection of the dirtiness of the glass, made up of a measuring photosensitive element receiving light directly through the glass and a reference photosensitive element isolated from any direct light and influenced only by the light transmitted through the interior of the glassing and an electronic circuit to receive and compare the responses of the two photosensitive elements and means to control the cleaning components automatically when the difference is response of these elements exceeds a certain threshold.
13 Claims, 6 Drawing Figures
