Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A motorized projection screen system, comprising; a roller having a projection screen affixed thereto; a reversible motor engaging the roller such that rotation of the motor rotates the roller to raise or lower the projection screen; bias means operatively connected to the roller such that rotation of the roller to lower the projection screen biases the roller toward rotation in the opposite direction.
Claim 2
Dependent Claim
63 words
A motorized projection screen system, comprising; a roller having a projection screen affixed thereto; a reversible motor engaging the roller such that rotation of the motor rotates the roller to raise or lower the projection screen; bias means operatively connected to the roller such that rotation of the roller to lower the projection screen biases the roller toward rotation in the opposite direction.
Claim 3
Dependent Claim
41 words
The projection screen system of claim 1 wherein the reversible motor comprises a DC motor, the projection screen system further comprising: a casing to which the roller is rotatably mounted; and a DC power supply operatively connected to the reversible motor.
Claim 4
Dependent Claim
16 words
The projection screen system of claim 2 wherein the DC power supply comprises a rechargeable battery.
Claim 5
Dependent Claim
34 words
The projection screen system of claim 2 further comprising control means for controlling the rotation of the reversible motor, the control means operatively connected to the DC power supply and to the reversible motor.
Claim 6
Dependent Claim
24 words
The projection screen of claim 1 wherein the roller is hollow and the reversible motor and the bias means are disposed within the roller.
Claim 7
Dependent Claim
21 words
The projection screen system of claim 4 wherein the roller is positioned between the DC power supply and the control means.
Claim 8
Independent Claim
113 words
A method for controlling a motorized projection screen system, the projection screen system including a roller having a projection screen affixed thereto, a reversible motor engaging the roller such that rotation of the motor rotates the roller to raise or lower the projection screen, and bias means for biasing the roller operatively connected to the roller, such that rotation of the roller to lower the screen biases the roller toward rotation in the opposite direction, the method comprising the steps of: starting the motor with bias means in a non-biased position; and rotating the reversible motor in one direction to thereby unwind the projection screen from the roller and to bias the roller.
Claim 9
Independent Claim
113 words
A method for controlling a motorized projection screen system, the projection screen system including a roller having a projection screen affixed thereto, a reversible motor engaging the roller such that rotation of the motor rotates the roller to raise or lower the projection screen, and bias means for biasing the roller operatively connected to the roller, such that rotation of the roller to lower the screen biases the roller toward rotation in the opposite direction, the method comprising the steps of: starting the motor with bias means in a non-biased position; and rotating the reversible motor in one direction to thereby unwind the projection screen from the roller and to bias the roller.
Claim 10
Dependent Claim
37 words
The method of claim 7 further comprising the steps of: stopping the motor; rotating the motor in the opposite direction thereby allowing the bias means to assist the motor in winding the projection screen around the roller.
Claim 11
Dependent Claim
47 words
The method of claim 7 wherein the projection screen system further comprises a power supply operatively connected to the reversible motor and a control means for controlling the rotation of the reversible motor, the control means operatively connected to the power supply and to the reversible motor.