US340320A

US340320A - jadwin

Info

Publication number: US340320A
Authority: US
Publication date: 1886-04-20
Anticipated expiration: 1903-04-20

Description

3 SheetS-Sheet 1.

(No Model.) 0. H. JADWIN.

,GABLE TRACTION FOR STREET GARS. No. 340,320, Patented Apr. 20, 1886 N S R k I 4X WITNESSES: INVENTOR:

- F"-'- fi S I v BY ATTORNEYS.

N. PETERS, Phnlo-Lnhugmpher. Washinglnv. n. c.

3 Sheets-Sheet 2.

(No Model.)

0. H. JADWIN.

'GABLETRAGTION FOR STREET CARS.

INVENTOR ATTORNEYS.

, Finn/ll I l f f 2 ,...;E t n ed Apr. 20-, 1886.

WITNESSES:

N PETERS. Pinto-Lithographer. Wasnmglnn. D40.

(No Model.) 3 Sheets-Sheet 3. O. H. JADWIN.

CABLE TRACTION FOR STREET CARS.

WITNESSES;

UNITED STATES ORLANDO H. JADWIN,

PATENT FFICE.

OF NEWV YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 840,320, dated April 20, 1886.

Application filed August 26, 1885. Serial No. 175,375.

To all whom it may concern:

Be it known that I, ORLANDO H. J ADWIN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a new and useful Improvement in Gable Traction for Street- Cars, of which the following is a description.

Figure 1 is a side View of my improved devices. Fig. 2 is a similar view with the grip disconnected from its cable and crossing a cable at right angles. Fig. 3 isa similar view of the device slightly modified for elevated railroads, showing the-grip passing the supporting-pulleys without touching them.

My invention relates to gripping attachments for traction-cable systems, and it has reference more particularly to the patents heretofore granted me, No. 258,425, May 23, 1882, and No. 307,306, October 28, 1884. In the former of these I described and claimed a means of relieving the cable of the weight of the gripping attachment by a counter-balance,

and in the latter I described and claimed a.

means of attaching the gripping attachment to the car by links, so that when the strain of the cable was transmitted to the car the gripping attachment was made to lift with the cable away from its supporting-pulleys.

My present invention partakes of the nature of both of the foregoing constructions; and it consists in certain features of improvement thereon, as will be hereinafter fully described.

In the draWings,W is the cable, running in the conduit- Y upon the paired pulleys X X, which latter are mounted upon the opposite ends of the rocking lever X which latter. is fulcrumed upon a support whoseshoulders s s limit the play or oscillation of said lever. To the lower portion of the car is rigidly attached a horizonai bar or rod, J, to which the draft strain is to be applied in pulling the car. To this rod are secured at points a few feet apartthe snap-hooks I and H, said hooks being held in place on the rod by collars or nuts.

' M is the rectangular gripper-frame, which carries the gripping devices for seizing the cable. This frame M may be made in one piece with the bar M", which latter carries at one end the gripping devices and at the other end the arch-bar and hand-lever L, and between the two an eye is formed in said bar, which is connected by a link, A, to the front (No model.)

snap-hook, I. This link constitutes the sup port of the gripping devices, and it is so arranged between the gripping-frame M at one end and the arch bar and lever L at the other as to cause the two to nearly balance about the link A as a fulcrum, and thus securing the balancing efiect and the relief of the cable from the weight of the gripper by a principle similar to that embodied inmy Patent No. 258,425, but without the use of a counterweight. The fulcrum-point A, however, is so disposed as to make the end M, which carries the gripping devices, a little lighter than the end which carries the hand-lever,for the purpose of keeping the footof the grip against the cable to help it over the supporting-pulleys by exerting a lift on the cable, and also for the more important purpose of causing the grip, when liberated from the cable, to lift itself out of the way of its own cable and permit it to pass over another cable or crosstrack in elevated railroads running crosswise.

On the opposite side of the grippingframe M is pivoted a supporting bar, M, whose rear end is loosely connected by a chain, A, to the hook B. Now, it will beseen that the link A and chain B form a connection between the gripperand the car which causes the draftstrain to lift the gripper, and with it the cable, after the manner of my Patent No. 307,306. In that patent the parallel links or hangers did not allow sufficient freedom of play in lateral horizontal direction in placing the gripfoot beneath and taking it away from the cable. The chains A A give free play to the gripman in all directions and facilitate the operation of applying the grip to and disengaging it from the cable. The rear chain, A, it will be observed,islonger than A. The obof bars M M to work about A as a fulcrum in applying and removing the gripper. \Vhen the car is under headway, the grip and cable are lifted above the carrying-pulleys, as in Fig. 3, and as these pulleys are limited by the shoulders or bearings s s, Fig. 1, in their upward movements the grip passes over them without touching them, I

The gripping device consists of a hand-lever, L, fulcrumed to the bar M and having its lower end jointed to a rod, L, which passes to the toggle-joint of the arms P E, of which P ject of this is to give free play to the rear end is jointed to the top of the grippingframe, \vhileE is jointed to the middle of a foot, D, whose ends are jointed to shoes or jaws D", which press the cable against the lower foot of the gripping device. The foot D and shoes 1) are also connected by the same pin to short links 0, jointed to the gripping frame or yoke M. The object of these links 0 is to insure the keeping of the upper foot and jaws from binding on the shanks of the grip.

To facilitate the rounding ofcurves,the yoke or frame Mis provided with a vertical foot, a, Fig. 1, and the lower foot is made in two parts to permit motion about the axis of the joint.

Having thus described my invention, what I claim as new is-- 1. A gripping attachment for cable traction suspended from the car at two points and having its gripping devices between said points balanced, or nearly so, by the hand-lever and its supporting-bar, substantially as and for the purpose described.

2. The combination, with acar, of a gripping attachment suspended therefrom on each side of the gripping'jaws by links or chains of unequal length, and having the longer chain remote from the hand lever, as and for the purpose described.

3. The combination of bar J, having books I H, the gripper-frame M and M jointed rod M, and the chain-links A and A, supporting the gripper upon opposite sides.

4. The combination, with a pulley-support having shoulders or rests s s, of the lever X, bearing pulleys X X, the said lever being limited in its oscillation by said shoulders, as and for the purpose described.

5. The combination, with the grip-fran1e M, of the toggle-joint, the attached foot D, shoes D D", and links 0 C, the said links,shoes,and foot being fastened together by a single jointpin. substantially as and for the purpose de scribed.

6. The grip-frame M,having a verticaljoint, a, in the same, substantially as and for the purpose described.

' ORLANDO H. JADW'IN.

W'itnesses:

(J. SnDGWIoK, J. L. MOAULIFFE.