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Level Crossing Gate (Patent No: 314718)

Inventor: Daering, Rudolf

Location: Norton

Comments: N/A

Description:
WHAT I CLAIM AS MY INVENTION, AND DESIRE TO SECURE BY LETTERS PATENT, IS -

1. The combination in an automatically controlled sliding gate of the type described of gate posts with a shaft at the upper ends, suspension pulleys carried thereon, a slidable suspended gate, guide rails on the said gate posts, flanged rollers slidably operating against the said guide rails, axles for the said rollers journaled in slotted holes in brackets attached to the gate, springs connecting the said axles with the gate frame for holding the rollers and gate frame on to the said guide rails, a spring controlled clutch for disconnecting the motive mechanism driving the said shaft to allow the gate to close by its own weight, all as set forth.

2. The combination in an automatically controlled slidable gate of the type described of gate posts with a suspended gate, suspension pulleys, a releasing clutch to allow the said gate to fall by its own weight, a system of underground or overground cables connecting distant tripping contact points with the said clutch, a tightener spring to maintain even tension in the said cables, a contact tripping device comprising a spring depression member with a plunger post attached, and two flanged guide pulleys arranged for the conversion of a downward stroke to a horizontal pull on the cable, all as set forth.

3. In an automatically controlled slidable gate of the type described, a spiral spring driving motor, a ratchet and pawl check for winding the said spring in combination with a stop disc and independent stop-dog to hold the spring, a stop pin and independent stop lever to hold the said stop disc while winding, a toothed spur wheel meshing with a rack attached to the slidable gate for winding the said spring when the said gate is closing by reason of its own weight, a release lever to throw out the said stop-dog from holding the said stop disc, a lever or a bridge to operate the said release lever by a, downward motion, a contact device comprising a spring depression member with a plunger post attached to automatically depress the said lever of bridge, two pairs of meshed bevel gears for the transmission of the necessary power to raise the said gate. All as set forth.

4. In an automatically controlled slidable suspended gate of the type described gate posts, a suspension shaft and pulleys, a spring controlled clutch to permit the raising of the said gate, a system of tension transmission cables controlling the said clutch, contact tripping devices to automatical1y pull the said cables for lowering the said gate, a spring motor automatically wound up by the falling action of the said gate under its own weight, a rack on the gate meshing with a spur wheel on the motor shaft to effect this winding up of the said spring, a ratchet operating with the said spring, a stop disc running loose on a shaft supporting the motor mechanism, a pawl attached to the said disc and meshing with the said ratchet, stop-dog holding and releasing levers controlling the rotation of the said stop disc, a pin stop to check the turning of the said stop disc when the said spring is being wound up, an automatic contact spring depression device controlling the said stop-dog, holding and releasing levers, bevel spur wheels for angular transmission of the motive power from the motor to the gate raising shaft, all substantially as set forth in the specification of drawings.

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