Control circuit for a coffee grinder
DCFirst Claim
1. A control circuit that controls a coffee grinder, the coffee grinder having a grinder motor, the control circuit comprising:
- a timer portion; and
a first switch functioning as a two-condition switch to place the control circuit in one of (1) an off condition when the first switch is open and the timer portion and the grinder motor are de-energized and (2) a run condition when the first switch is closed, the timer portion is energized, and the grinder motor is energized once in the run condition, the control circuit remaining in the run condition until the timer portion times out or until the first switch is re-opened thereby returning the control circuit to the off condition.
6 Assignments
Litigations
0 Petitions
Accused Products
Abstract
A control circuit controls a coffee grinder having a grinder motor. The control circuit includes a timer portion and a first switch. The first switch functions as a two-condition switch to place the control circuit in one of (1) an off condition when the first switch is open and the timer portion and the grinder motor are de-energized and (2) a run condition when the first switch is closed, the timer portion is energized, and the grinder motor is energized once in the run condition, the control circuit remaining in the run condition until the timer portion times out or until the first switch is re-opened thereby returning the control circuit to the off condition.
-
Citations
15 Claims
-
1. A control circuit that controls a coffee grinder, the coffee grinder having a grinder motor, the control circuit comprising:
-
a timer portion; and
a first switch functioning as a two-condition switch to place the control circuit in one of (1) an off condition when the first switch is open and the timer portion and the grinder motor are de-energized and (2) a run condition when the first switch is closed, the timer portion is energized, and the grinder motor is energized once in the run condition, the control circuit remaining in the run condition until the timer portion times out or until the first switch is re-opened thereby returning the control circuit to the off condition. - View Dependent Claims (2, 3)
-
-
4. A control circuit that controls a coffee grinder, the coffee grinder having a grinder motor, the control circuit comprising:
-
a timer portion;
a first switch; and
a second switch physically separated from the first switch, the switches, together functioning as a two-condition switch to place the control circuit in one of (1) an off condition when one of the first switch and the second switch is open, the other switch is open or closed, and the timer portion and the grinder motor are de-energized and (2) a run condition when both the first and second switches are closed, the timer portion is energized, and the grinder motor is energized once in the run condition, the control circuit remaining in the run condition until the timer portion times out or until one of the switches is re-opened thereby returning the control circuit to the off condition. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A control circuit that controls a coffee grinder, the coffee grinder having a grinder motor, the control circuit comprising:
-
a timer portion;
a safety interlock switch that is actuated to close when a lid on the coffee grinder is closed; and
a pushbutton switch, physically separated from the safety interlock switch which must be pushed and maintained by a user to energize the timer portion, and functions in conjunction with the safety interlock switch as a two-condition switch to place the control circuit in (1) an off condition when one of the safety interlock switch and the pushbutton switch is open, the other switch is open or closed, and the timer portion and the grinder motor are de-energized and (2) a run condition when both the safety interlock switch and the pushbutton switch are closed, the timer portion is energized, and the grinder motor is energized once in the run condition, the control circuit remaining in the run condition until the timer portion times out or until one of the switches is re-opened thereby returning the control circuit to the off condition.
-
-
15. A control circuit that controls a coffee grinder, the coffee grinder having a grinder motor, the control circuit comprising:
-
a timer portion;
a safety interlock switch that is actuated to close when a lid on the coffee grinder is closed; and
a pushbutton switch, physically separated from the safety interlock switch which need only be pushed momentarily by a user in order to energize the timer portion, and functions in conjunction with the safety interlock switch as a two-condition switch to place the control circuit in (1) an off condition when one of the safety interlock switch and the pushbutton switch is open, the other switch is open or closed, and the timer portion and the grinder motor are de-energized and (2) a run condition when the safety interlock switch is closed, the pushbutton switch is pushed momentarily closed, the timer portion is energized, and the grinder motor is energized once in the run condition, the control circuit remaining in the run condition until the timer portion times out or until the pushbutton is pushed momentarily a second time by the user in order to de-energize the control circuit, or until the safety interlock switch is re-opened thereby returning the control circuit to the off condition.
-
Specification