Abstract: A safety mechanism for a utility knife is provided to prevent more than one retraction of the blade shield for each trigger actuation. A separable linkage extends between an actuator and a strut, and has a seat member and a deflecting member that are linked together when the actuator is not depressed and the strut is in the safety position blocking the retraction of the shield. The separable linkage is configured to transmit the pressing action of the actuator to the strut to disengage it from the bracket. The separable linkage is configured to delink as the shield retracts. If the actuator continues to be pressed in after the shield returns from being retracted, the safety mechanism prevents relinking of the seat member and the deflecting member, due to the deflecting member being deflected away from the seat member in a substantially longitudinal direction.

Abstract: The housing of a portable radar unit includes features for providing positioning of auxiliary handles between a first position and a second position, in which: the first position places the auxiliary handles in a position to act as handgrips in conjunction with integral handles and the second position places the auxiliary handles at an angle to the integral handles, so that the radar unit can be held with one hand and supported by a forearm of the same hand. Rotation of each auxiliary handle about a pivot moves the auxiliary handle between the first position and the second position; and a friction mechanism resists the rotation so that the auxiliary handle tends to stay in position until purposefully moved. The housing also includes internal space for housing a radar antenna, a reflector, and a mechanism for adjusting distance between the reflector and the antenna for tuning performance of the antenna.

Abstract: A safety mechanism for a utility knife is provided to prevent more than one retraction of the blade shield for each trigger actuation. A separable linkage extends between an actuator and a strut, and has a seat member and a deflecting member that are linked together when the actuator is not depressed and the strut is in the safety position blocking the retraction of the shield. The separable linkage is configured to transmit the pressing action of the actuator to the strut to disengage it from the bracket. The separable linkage is configured to delink as the shield retracts. If the actuator continues to be pressed in after the shield returns from being retracted, the safety mechanism prevents relinking of the seat member and the deflecting member, due to the deflecting member being deflected away from the seat member in a substantially longitudinal direction.

Abstract: A cutting apparatus has a unidirectionally-locking blade cover that automatically snaps back over the exposed blade after each cut, and a dependent, index finger operated unlocking trigger.

Abstract: A cutting apparatus has a unidirectionally-locking blade cover that automatically snaps back over the exposed blade after each cut, and a dependent, index finger operated unlocking trigger.

Abstract: The housing of a portable radar unit includes features for providing positioning of auxiliary handles between a first position and a second position, in which: the first position places the auxiliary handles in a position to act as handgrips in conjunction with integral handles and the second position places the auxiliary handles at an angle to the integral handles, so that the radar unit can be held with one hand and supported by a forearm of the same hand. Rotation of each auxiliary handle about a pivot moves the auxiliary handle between the first position and the second position; and a friction mechanism resists the rotation so that the auxiliary handle tends to stay in position until purposefully moved. The housing also includes internal space for housing a radar antenna, a reflector, and a mechanism for adjusting distance between the reflector and the antenna for tuning performance of the antenna.

Abstract: A cutting apparatus has a unidirectionally-locking blade cover that automatically snaps back over the exposed blade after each cut, and a dependent, index finger operated unlocking trigger.

Abstract: A cutting apparatus has a unidirectionally-locking blade cover that automatically snaps back over the exposed blade after each cut, and a dependent, index finger operated unlocking trigger.