US820280A - Trolley-stand. - Google Patents

Description

No. 820,280. PATENTED MAY 8, 1906. VV. W. ANNABLB.

TROLLEY STAND. APPLIOATIGN FILED Uuml, 1"9o5.

UNITED STATES `PATENT OFFICE@ TROLLEY-STAN D.

Specification of Letters Patent.

Patented May 8, 1906.

Application filed January 31, 1905. Serial No. 243,577.

To LZZ whom t may concern:

B e it known that I, WARREN W. ANNABLE, a citizen of the United States, residing atr art to which it appertains to make and usek the same.

My invention relates to improvements in trolley-stands; and its object is to provide means for lowering the pole whenever the trolley-wheel runs off the line and the pole is liable to contact the line-supports or other obstructions, to provide means for adjusting the device, and to provide the same with various new and useful features hereinafter more fully described and particularly pointed out in the claims.

My invention consists, essentially, of a trolley-stand provided with the usual arm and pivoted pole-support, springs connected to the arm at one end and at the other end connected to the ole-support by links, cams to adjust the lin is, and thus vary the leverage and tension of the springs, trip and adjusting mechanism to operate the cams, and in various features of construction, combination, and arrangement, as will more fully appear by reference to the accompanying drawings, in which- Figure 1 is a side elevation of a device ernbodying my invention with parts shown in. position when the trolley-pole is lowered; Fig. 2, a rear elevation of the same; Fig. 3, a plan view of the same 5 and Fig. 4, a side elevation of the device adjusted for engagement with the line-wire.

Like numbers refer to like parts in all of the figures.

1 represents a portion of the usual base secured to the top of the car; 2, a head mounted on the base and freely rotative on its vertical axis; 3, an arm extending horizontally from the head, to which the springs 20 are adjustably attached inthe usual way.

4 is a tubular spring-case projecting horizontally from the head 2 and opposite the arm 3. This case is open at the outer end to receive a spring 12, which spring is retained in the case by a removable pin 14 and engages a bar 11, extending transversely through the case 4 and slidable horizontally in slots 13 in the opposite side of the case.

8 is a pole-support to which the trolleypole 9 is secured. This support is bifurcated at its lower end and pivoted on arock-shaft 7, journaled in a transverse bearing 34 in the upper rear portion of the head 2. This support is also extended below its pivot, as at 10, and adapted to enga e the ends of the bar 11, when the pole is near y vertical, and thus the spring 1 2 will yieldingly resist the further forward movement of the pole 9 when the trolley-wheel runs off the line. To adjustably connect the springs 20 with the polesupport, a link 15 at each side of the same is pivotally connected to the support at one end and connected at the other end to a rod 16, movable toward and from the shaft 7 about the axis of the pivots of the links 15, on the outer ends of which are mounted rolls 17, which rolls are engaged by cams 21, rigidly keyed to the rock-shaft 7 as at 33 in Fig. 2, whereby these cams move simultaneously. The cams 21 are also provided with recesses in their ends and eccentric forward surfaces,

the same to the rod 16 by means of links 18,

whereby the links rotate on the rod 16, and thus prevent wear on the ends of the springs, and the springs may be detached and replaced in case of breakage without detaching any of the other parts. The cams 21 are provided with arms 22, extending downward and adapted to engage adjusting-screws 6 in the outer ends of oppositely-projecting lugs 5 on the lower part of the head 2 to limit the movement of the cams rearward, and thus adjust the tension of the springs 20 when the cams are tripped. To trip these cams, I provide a lever 23, fulcrumed on the rock-shaft 7 and having its short end 27 provided with a laterally-projecting lug 28 to'engage the rear of one of the arms 22. In the forward end of the lever 23 lis an adjustable eyebolt 24, to which is attacheda wire or cord 25, extending therefrom to the harp 26 and attached thereto. The tension of this wire or cord is yieldingly maintained by means of a laterally-projecting arm 29 on the lever 23, between which arm and a spring-seat 30, ex-

IOO

IIO

tending outward from the extension 10, is a spring 31, in the aXis of which spring is a bolt 32 to limit the expansion of the spring and to retain the spring 1n place.

In operating the device it is adjusted for engaging the line-wire by pulling the trolleypole down to a substantially horizontal position. This movement engages the rolls 17 with the recess in the cams, and thus increases both the tension and leverage of the springs 20. When the pole is released, the springs 20 will turn the parts to the position shown in Fig. 4, when the extension 10 will engage the bar 11, and thus be yieldingly stopped in this position. rlhe pole being drawn down sufficiently to engage the Wheel with the line-wire the device will operate in the usual way, maintaining the wheel in contact with the wire by the tension of the springs 20. If now the trolley-wheel should leave the line-wire, the pole will approach the vertical until stopped by the bar 11, which will move and cause the spring 12 to yield, and thus prevent shock and breakage. lf now upon approaching a line-wire support or other obstruction the wire 25 strikes the same, the increased tension thereon will turn the trip-lever upon its fulcrum and compress the spring 31, thus bringing the lug 28 against the arm 22 and throwing the ends of the cams out Jfrom under the rolls 16. This will reduce both the tension and leverage of the springs 20 sufficient to permit the trolleypole to retrieve or fall to the rear, and thus avoid striking the said obstruction. The yielding lof the spring 31 will prevent breakage of the wire 25 or injury of any obstruction contacted by said wire. Vhen the arms 22 strike the stop-screws 6, the rolls 17 will traverse the inclined surfaces oi the cams until the resistance of the springs 2O will bring the pole to rest without shock and in a su'l'liciently lowered position to run under all ordinary obstructions and also with the tension of the springs so reduced that in any event it would be readily depressed still further,ii` necessary, to pass under a very low obstruction. To restore the device to operative position, it is only necessary to pull the trolley-pole to horizontal position, as heretofore stated. By adjusting the screws 6 the amount of retrieve or backward movement of the trolley-pole when the cams are tripped can be varied as occasion requires.

Having thus fully described my invention, what l claim, and desire to secure by Letters Patent, is-

1. In a trolley-stand, a pivoted pole-support, springs to yieldingly elevate the pole, and means for automatically reducing the tension .of said springs when the said means strikes an obstruction.

2. In a trolley, a pivoted pole-support, springs attached to the pole-support and means for automatically reducing the leverage and tension of said springs when the said means strikes an obstruction.

3. ln a trolley, a pole, pole-supporting springs, cams adapted to increase and decrease the tension of the said springs, a lever to turn the cams, and a wire or cord attached to the lever and carried in advance of the pole.

4. ln a trolley, a pole, pole-supporting springs, means for increasing and decreasin the tension of said springs, and a wire carrie in advance of the pole and operating said means to reduce the tension of the springs when said wire contacts an obstruction.

5. ln a trolley, a pole, a pivoted pole-support, links pivoted at one end and movable at the other end, springs connected to the links, cams to move the links, stops to limit the movement of the cams in one direction, a lever to move the cams, and a cord attached to th lever and supported in advance of the po e.

6. ln a trolley, a pole, a pivoted pole-support, links pivoted to the pole-support at one end and movable toward and from the pivot oi the pole-support at the other end, rolls connected to the links, cams engaging the rolls, adjustable stop screws to limit the movement of the cams, a lever to trip the cams, and a wire connected to the lever at one end and to the upper part of the trolleypole at the other end.

7. In a trolley, the combination oi' a rockshaft, a pole, a pole-support pivoted on the rock-shaft, cams iiXed on the rock-shaft, arms on the cams, adjustable stops to engage the arms, a lever journaled on the rock-shaft and engaging one of the arms, a wire connected to the lever and to the upper part of the pole, links pivoted tothe pole-support, rolls connected to the links and engaged by the cams, and springs connected to the links.

8. In a trolley, a pole, a pivotedpole-support links pivoted to the pole-support at one end, rolls and springs connected to the other end of the links, cams provided with eccentric surfaces and end recesses to engage the rolls, a lever to trip the cams, and a wire eX- tended in advance of the pole and attached to the lever to operate the same.

9. In a trolley, a pole, a polesupport, springs connected to the support, a rockshaft, cams fixed on the rock-shaft and adapted to increase or decrease the tension of the springs, a stop to limit the movement of the cams, a lever to turn the cams toward the stop, an arm on the lever, a spring-seat on the pole-support, a spring between the arm and seat and a wire connected to the lever and to the upper part of the pole, and also carried in advance of the pole.

10. In a trolley-stand, a pole, a rotative head, a rock-shaft journaled in the head, a bifurcated pole-support journaled on the rock-shaft and extended below the same, a spring-tube on the head and having slots in its opposite sides, a bar slidable in the slots nected to the lever and to the upper part of .no and engaged by the support, a sprn in the the pole.

tube and engaging the ber, earns Xe on the In testimony whereof I ailix my signature rook-shaft, links pivoteol to the support and in presence of two Witnesses.

moved by the earns springs connected to the links, a lever journailed on the rock-shaft, an WARREN W' ANNABLE' arm on the lever, a spring en aging the arm, Witnesses:

a seat on the support engage by the lever, a LUTHER V. MoULToN,

bolt in the seat and arm, and a Wire oon- EDWARD R. MONROE.

Images