Timer for a gas stove

A timer for a gas stove having an ignition device and a valve for starting and controlling flames, the timer comprising:

• a housing to be mounted on the gas stove and to receive a battery, a sleeve pivotally connected to the housing and adapted to be coupled to the ignition device and the valve;
• a switch having a shaft extending therefrom, the shaft further extending into and coupled to the sleeve so that a user is able to turn the switch for starting and controlling the flames;
• a controlling unit to be supplied power by the battery, and having an electronic circuit to provide a timing function and multiple controlling buttons to set the controlling unit;
• a driving unit mounted inside the housing and having a motor and a transmission coupled to the motor;
• and
• a clutch unit having an axle extending from an inner surface of the housing, a barrel securely mounted around the axle and having a threaded outer surface formed thereon, the clutch unit also having a first gear and a second gear, the first gear coupled with the transmission and screwed on the barrel by mating a threaded bore defined through the first gear and the threaded outer surface of the barrel, a first toothed face formed on the first gear, the second gear coupled with the sleeve and mounted around the axle, a second toothed face formed on the second gear to mesh with the first toothed face, a spring mounted around the axle and compressed between the first gear and the second gear,
• whereby a user is able to set the controlling unit to a preferred period so that once the period has elapsed, the controlling unit automatically activates the motor and thereby rotates the shaft to shut the gas stove off.