Abstract: A float actuated resistive oil level display with warning for providing continuous visual indication of oil level in the oil pan of an internal combustion engine. The system includes a reservoir which communicates with the oil pan such that the oil level in the reservoir corresponds to that in the oil pan. A selectively designed float resistor is disposed within the reservoir in such a manner as to compensate for the quantity of oil distributed throughout an engine's lubricating system while it is running, and is part of an electrical circuit which includes a meter and an alarm circuit remotely positioned within the view of the operator of the motor vehicle or other device powered by the engine to provide a continuous visual indication of oil level in the oil pan, even while such motor vehicle or other device is being operated.

Abstract: A mechanical locking device includes multiple components that must move before axial travel of a load exerting component becomes unblocked. Such elements include a main lock means that is radially movable to unblock said axial travel; axially movable holder means that blocks radial movement of the main lock means; radially movable trigger means that blocks axial movement of the holder means; and release structure blocking radial movement of the trigger means. At least one and preferably both of the main lock means and of the trigger means comprises multiple elements spaced apart about the device axis for independent radial movement, such elements typically being caged for such independent movement.