Abstract: A shooter aims his equipment, such as a gun or bow, in the normal fashion with the optical axis of the aiming eye aligned with the gun's front and rear sights towards a target. A thin optical filter manufactured with alternating transparent and solid spaces is applied to the shooter's protective glasses on the lens of the non-aiming eye. The shooter proceeds to aim with both eyes open having only the non-aiming eye's vision filtered. The aiming eye's perceived dominance is increased by reducing the visual signal sent to the brain from the non-aiming eye.

Abstract: A shooter aims his equipment, such as a gun or bow, in the normal fashion with the optical axis of the aiming eye aligned with the gun's front and rear sights towards a target. A thin optical filter manufactured with alternating transparent and solid spaces is applied to the shooter's protective glasses on the lens of the non-aiming eye. The shooter proceeds to aim with both eyes open having only the non-aiming eye's vision filtered. The aiming eye's perceived dominance is increased by reducing the visual signal sent to the brain from the non-aiming eye.

Abstract: A circuit is described for timing the intermittent use of an appliance, wherein the appliance includes a usage signal for indicating that the appliance is in use. The circuit includes a battery, and a resistive network, coupled to the battery, for draining power from the battery such that the power level thereof decreases to a threshold level over a selected timing interval. The circuit further includes a switch, responsive to the usage signal, for selectively enabling the resistive network, and a battery level threshold detector, responsive to the battery reaching the threshold level, for indicating that the timing interval has lapsed, thereby alerting the operator that the appliance should be serviced, which service includes replacement of the low cost battery.

Abstract: A door operator system includes up and down limit switches actuated to the closed position when the door reaches the up and down travel limits. A processor circuit within the operator is connected to the limit switches for ascertaining the position of the door. Bias circuits apply a bias to the processor when the limit switches are open. An indicator system comprising a pair of light emitting diodes connected across respective limit switches indicates the door position. A series impedance element common to both LED circuits prevents actuation of the control circuit by the light emitting devices.

Abstract: A radio-controlled door operator system includes a reversible AC motor and lamp. Power is supplied to the motor and lamp by a pair of power control relays each having two single-pole double-throw contacts. Actuation of one relay results in clockwise rotation of the motor and lighting of the lamp. Actuation of the other relay results in counter-clockwise rotation of the motor and lighting of the lamp. Actuation of both relays results in lighting of the lamp only. Three different active operating states are thus established by the two relays.

Abstract: A proportional flow control valve includes an electromagnetic actuator which controls the displacement of an elongate member such as a leaf spring with respect to two or more fluid conveying apertures aligned with the member to achieve a fluid flow proportional to the current applied to the actuator. One portion of the member is displaced with respect to another portion of the member by the electromagnetic actuator in order to selectively open an outlet aperture and one or more of the inlet apertures occluded by the member, achieving a desired fluid flow. A firm-off stopper for occluding the output aperture may be attached near the point of connection between the actuator and the member to assure that the flow through the valve is completely terminated when the valve is in the "off" position. The member may be fixed at one end or it may be free at two ends with a selectively positionable intermediate weight arranged to adjust the rate of displacement of the ends of the member with respect to the apertures.

Abstract: A control arrangement is provided for a self-cleaning oven or similar thermostatically controlled apparatus. The self-cleaning oven in one arrangement is of the type that includes a manual latching arrangement operated by a handle for latching a pivotally mounted front door of the oven. The self-cleaning oven also includes a temperature control circuit having a sensing element arranged to sense the temperature of the oven cavity. The oven temperature control circuit is responsive to manually operable selector arrangements of the oven including oven temperature and oven mode selection arrangements. In one arrangement, the oven controls are provided by a rotatable selector control. The control arrangement includes a locking arrangement for the door latch to automatically lock the door latch arrangement whenever the oven door latch is closed and to unlock the door latch predetermined operating modes when the oven temperature is below a predetermined temperature.