US1031328A - Hauling-rope grip for rope railways. - Google Patents

Description

I. DUHLE. HAULING non: GRIP FOR ROPE RAILWAYS.

APPLIOATIOII FILED OUT. 10, 1911.

Patnted July 2, 1912.

III/I COLUMBIA PLANOORAPH (0.. WASHINGTON. D. c.

leverage.

UNITED STATES PATENT OFFIGE.

FRITZ DfiI-ILE, OE-LEIPZIG, GERMANY, ASSIGNUR TO" ADOLF BLEICHERT OF LEIPZIG-GOHLIS, GERMANY. V g

8:: COMPANY,

HAULING-ROPE GRIP FOR ROPE RAILWAYS.

Patented July 2, 1912. Serial No. 653,935.

To all whom it may concern:

Be it known that I, FRITZ DoHLE, residing at Leipzig, Germany, subject of the German Emperor, have invented an Improved Hauling-Rope Grip forRope Railways, of which the following is a full, clear, and exact description of my invention.

lVith the known haulage rope grips which are actuated by the weight of the load the grip is unable to open downward, since the weight of the haulage rope, and the downwardly directed components of the rope tension occurring at variations of the gradient have the tendency to drag the rope away from the grip. On the other hand grips opening upward have certain constructional disadvantages, more particularly that of requiring a considerable length of the coupling and uncoupling devices in the stations.

The object of the present invention is to remove the aforesaid disadvantages of downwardly opening grips by providing an automaticdevice whereby each tendency to drag the rope out of the grip increases the force with which the grip holdsthe rope.

The invention is illustrated in the accompanying drawing, which shows an example in which the same is applied to a rope railway with the hauling rope below the carrying rope.

Figure 1 shows the device with the grip open, and Fig. 2 shows the device with the grip closed.

Loosely mounted in the carrier a, which has a depending arm I), there is a member a guided by convex surfaces 9 and by a link (Z which creates very little friction and therefore does not interfere with the selflocking action. Connected by a pin f to the member 0 which carries one of the jaws, is a lever e the shorter arm of which forms the second jaw, the longer arm being guided in a recess in the arm 6 of the carrier a. When, as shown in Fig. 1, the rollers it run on to the rail 2' and thereby lift the member 0 and the pivot f, the jaws of the grip open. When however the coupling rollers are free of the rails the whole weight of the hanger and the truck connected to the member 0 by the bolt is, acts on the pivot pin f and closes the grip with a power in proportion to the Every downward pull causes the grip to close more tightly. Hence any force tending to pull the rope away causes pressure increased in proportion to the leverage exerted on both sides of the rope, so that complete or partial locking is effected. Since the suspension pivot is is located in the immediate vicinityof the hauling rope, the pressure on the running wheels is evenly distributed and curves can be easily taken, oven on the hanger side, owing to there only being a narrow piece of the hanger between the disk and the grip. Further, such swinging movement of the hanger as occurs in the direction of travel has no appreciable effect on the grip.

In order to prevent the opening of the gripby a possible upward pull on the rope counteracting the weight of the load, a safety device is provided in the form of a member Z adapted to lock the grip, said member having a wedge shaped lower end which engages the surface n on the ri lover a when the grip is closed (Fi 2) and the part Z is guided in the mem er 0 to which is connected the second jaw. The wedge body Z has a hook-shaped projection m which is adapted to engage with inclined guides at the station, for instance as shown in Fig. 1, with one of the rails for the rollers it, this causing the wedge part to be lifted away from its locking position.

The grip operates in the following manner: When the car leaves the station, with the hauling rope gripped, the part m runs off the rails and the wedge drops between opposite surfaces of the parts a and e. The wedge surface is so inclined that a perpendicular on the surface at, taken at the place of contact, lies above the pivot f, so that clockwise rotation of the lever, tending to open the grip, is prevented. If from an accidental cause, such as vibration, or by reason of pressure applied to tighten the grip, the lever rotates in the opposite direction, the wedge drops farther down, and the grip is increased. The movement of the wedge between two members moving at different speeds in the same direction results in a differential effect which produces a powerful locking action, even with a small wedge angle. The locking action described also prevents relaxation of the grip when only a component of the load is actuating the grip, on a gradient.

-Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is member guided in said carrier, a pair of jaws carried by said member, one of said jaws being movable with respect to the other of said jaws, and means for closing said jaws as said member moves downward with respect to said carrier.

3.- In a device of the class described, in combination, a carrier, a vertically movable member guided in said carrier, a pair of downwardly opening jaws carried by said member, one of said jaws being movable with respect to the other of said jaws, and means for closing said jaws as said member moves downward with respect to said carrier.

4. In a ropeway -car, in combination, a carrier, a vertically movable member guided in said carrier, a pair of jaws carried by said member, a hanger pivotally connected to one of said jaws, and means for closing said jaws as said member moves downward with respect to said carrier.

5. In a device of the class described, in combination, a carrier, a vertically movable member guided in said carrier, a pair of jaws carried by said member, one of said jaws being movable with respect to the other of said jaws, means for closing said jaws as said member moves downward with respect to said carrier, and means for automatically locking said jaws in their lowest closed position.

6. In a device of the class described, in combination, a carrier, a vertically movable member guided in said carrier, a jaw carried by said member, a second jaw pivotally mounted upon said member and cooperating with said first-mentioned jaw, and means for closing said jaws as said member moves downward with respect to said carrier.

7. In a device of the class described, in combination, a carrier, a vertically movable member guided in said carrier, a jaw carried by said member, a lever pivotally mounted upon said member, said lever comprising a jaw cooperating with said firstmentioned jaw, said member being further provided with an arm, and means upon said carrier and co-acting with said arm to open and close said jaws as said member moves upward and downward with respect to said carrier.

8. In a device of the class described, in combination, a carrier, a vertically movable member guided in said carrier, a jaw carried by said member, a lever pivotally mounted upon said member, said lever comprising a jaw cooperating with said firstmentioned jaw, said member being further provided with an arm, means upon said carrier and co-acting with said arm to open and close said aws as said member moves upward and downward with respect to said carrier, and means adapted to engage said lever to lock the jaws in their closed position.

In witness whereof I have signed this specification in the presence of two witnesses.

FRITZ DClHLE.

Witnesses RUDOLPH FRIOKE, ALBERT R. MORAWETZ,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.

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