Patent ID: 6533451
Filing Date: 2003-03-18
Classification: B63C,F42C,G04F

Abstract:
An underwater electromechanical timer comprising:a casing structure; a mechanical timer assembly mounted in the casing structure, the mechanical timer assembly comprising an endless screw and a threaded member engaging the endless screw, wherein a length of sliding of the threaded member along the endless screw represents a time programming of an activation event; a device switch mounted in the casing structure to activate an external device connected to the device switch, the device switch being switched by mechanical contact; a plunger element mounted in the casing structure, the plunger element terminating into a first end portion within the casing structure and a second end portion externally exposed through the casing structure so that the plunger element slides within the casing structure when a difference of pressure between an interior and an exterior of the casing structure occurs; and a motor slidably mounted in the casing structure and abutting the plunger element, the motor being connected to a driving wheel, thereby the plunger element under a greater external pressure engages the driving wheel of the motor with the mechanical timer assembly to rotate the endless screw so that the threaded member progressively slides along the endless screw to establish a timely-programmed mechanical contact of the device switch to activate the external device.