Title:
DEW CONDENSATION SENSOR
Document Type and Number:
Japanese Patent JPS63201977
Kind Code:
A
Abstract:
PURPOSE:To exactly detect a dew condensation at a quick response by performing a dew condensation detection by means of bringing a dew condensation sensor into direct contact with a lid plate, which acts a dew condensation change synchronized with the dew condensation change of a disk. CONSTITUTION:The dew condensation sensor is adhered by pressing on the end surface of the lid plate 7, which is stored together with the disk 6 in a disk case 5. When the disk 6 is inserted, and the dew condensation sensor is adhered by pressing on the lid plate 7, a dew condensation detection element 2 is cooled through a contact plate 1, and because it comes to an approximately equal temperature to that of the lid plate 7 within extremely short time (shorter than several seconds), it comes into a dew condensating state, and the resistance value of it extremely varies. This change of the resistance value is taken out as the change of an output through a lead line 4, and the motor or the like of a player is controlled. Thus, by quickly detecting the dew condensation, the quick response can be realized.
Inventors:
HOSOMI FUMIO
Application Number:
JP3502687A
Publication Date:
August 22, 1988
Filing Date:
February 18, 1987
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G11B33/14; G11B15/00; (IPC1-7): G11B15/00; G11B33/14
Attorney, Agent or Firm:
Akira Kobiji (2 outside)