| 摘要 |
The Hilyard Halter is an inverted U-shaped pendulum type of device which is pivoted at the outer ends of the U behind the back and below the head of an occupant in a vehicle and has a cushioned pad or net across the base of the U which is normally stored above the head of the occupant in the roof of the vehicle, and which in an emergency stop situation automatically quickly moves down in front of the occupant, by its own inertia and with aid, as well as extends to decelerate, surround and hold the occupant. The hubs for the pivoted frame are provided with adjustable spiral springs to increase the speed of action of the device, and the frame may be held from operation by adjustable spring applied balls in sockets around the hubs and/or solenoid operated catches that release when a given deceleration of the vehicle occurs. These hubs are also provided with stops for limiting the angular movement of the device. The legs of the U may be telescopic and provided with hydraulic pistons and/or compression springs for aiding in the deceleration of the occupant together with the resiliency of the cushion pad or net across the base of the U.
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