US800446A - Switch and signal track-trip. - Google Patents

Description

No. 800,446. PATENTED SEPT. 26, 1905. G. M. HURS'I'. SWITCH AND SIGNAL TRACK TRIP.

APPLICATION FILED OUT. 15,1904.

2 SHEETS-SHEET 1 Mm! HM 2 M I w WI 4- /9 2.

y 1 WI wunuummw .u u I I 4,-

2' SHEETS-SHEET 2 PATENTED SEPT. 26, 1905,

G. M. HURST. SWITCH AND SIGNAL TRACK TRIP. APPLICATION FILED 0OT.15,1904.

UNITED STATES PATENT CFFICE.

SWITCH AND SIGNAL TRACK-TRIP.

Specification of Letters Patent.

Patented Sept. 26, 1905.

Application filed October 15, 1904. Serial No. 228,627.

and signals by an appurtenance of a passing train. As ordinarily constructed they are secured to the cross-ties of the track near the rail in a position to be operated by a suitable shoe attached, preferably, to the journal-box of the engine or one of the cars and are connected to the switch or signal to be changed by a thrust-rod or cable, as circumstances may requn-e.

The object of the invention is to provide a trip having a gradual but positive tripping action without the complication of accessory parts.

The invention consists, broadly, in an apron inclined toward one or both its ends, joined to a fixture of the track by parallel links, and a crank-arm for attachment of the member connecting the device with the switch, rotated from the parallel links by means of a tie-rod from each.

The invention also consists in further details of construction to be hereinafter described.

In the accompanying drawings, illustrating the invention, Figure 1 is a detail plan of a railway-track, showing my tripping device mounted upon the cross-ties. Figs. 2 and 3 are vertical sections on the lines 2 2 and 3 3, respectively, of Fig. 1. In Fig. 3 is also shown a detail of a passing car provided with an attachment for operating the trip. Fig. 4: is a detail vertical section on the line 4 1 of Fig. 2. Fig. 5 is a plan view of a modified form of construction. Fig. 6 is a detail longitudinal section on the line 6 6 of Fig. 5. Fig. 7 is an end view of the device, showing the track in cross-section; and Fig. 8 is a sectional view on the line 8 8 of Fig. 5.

At 10 are shown the cross-ties of a railwaytrack, and at 11 a sleeper extending over and firmly secured to several of these and placed, preferably, outside the rail 12. An angle-bar or chair 13 is secured to the sleeper 11, and to this is attached a pair of brackets 1A 14, ex-

tending inwardly over the vertical leg of the angle-bar. An apron 15, formed of a commercial rolled shape, having a web and flange and being preferably of angle or T section, is connected to the brackets 1 1 14 by means of a pair of parallel links 16 16 pivoted in the brackets and in the web of the apron 15 adjacent its ends.

A tension-rod 17 has a sliding bearing in each of the parallel links 16, movement in one direction of the links being imparted to the tension-rod by means of a nut 18, adjustablyplaced on the rod. These tension-rods extend inwardly and are jointed to a crankarm 19, which has a pivotal support in asuitable chair 20, preferably of cast metal and bolted to the sleeper 11, which is gained out, as shown at 21, to allow free movement of the crank-arm,

The points of attachment of the tension-rod 17 in the crank-arm 19 are so disposed to the center about which the latter turns that tension on either rod rotates the crank-arm in the same direction. The crank-arm 19 has one end 22 longer than the other,-and to this end is attached asuitable cable or push-rod 23, leading to the switch or signal mechanism to be operated.

The apron 15 is bent near its middle, so as to present a gently and symmetrically inclined surface along the track in either direction and so as to be advanced and depressed by the ac-.

tion of an appurtenance of a passing train, such as a shoe 24, supported from the journal-box 25- of a car.

Considering now Fig. 1, a train approaching from the right would swing the apron 15 to its dotted-lines position, and the resultant rotation of the parallel links 16 would by pulling on the tension-rod 17 at the left rotate the crank-arm 19 to the dotted-lines position of Fig. 2, in which position it would remain until the switch or signal was restored to its original position by a duplication of this construction at any other point of the track or by other means. During the swinging of the apron just described the tension-rod 17 on the right would slide through its bearing in the link 16.

A swinging of the apron 15 to the right, (considering Fig. 1 again,) caused by a train approaching from the left, would pull on the tension-rod at the right, the one on the left merely sliding through its bearing in thelink 16. This motion would, however, rotate the crank-arm 19 in the same direction as before of the brackets, as 35. .as pivoted to one of the plates, as 28, and a and to the same position, so that the same effect would be produced upon the switch or signal mechanism.

A spring is employed to retain the apron 15 in its midposition, and, as shown, this consists in a pair of coiled springs 26, having a fixed attachment in the sleeper 11 and having their free ends applied to the parallel links 16. A short curved sectional angledoar 27 is employed at either end to support the free end of the parallel link 16.

\Vhile the means of connection between the arm 19 and the links 16 is shown as consisting of a rigid link adapted to apply tensional strains only, it is obvious that any connection which will yield in one direction and transmit strain from the link 16 to the arm 19 in the opposite direction will come within the scope of the invention.

W'hile the apron is shown as movable in horizontal plane, it is not essential that it occupy that position.

In the construction shown in Figs. 5 to 8 the apron is shown as movable in a vertical position. These figures show as a further modification an apron intended for use by trains moving in one direction only.

The device is carried by a pair of parallel plates 28 29, resting upon the outer ends of the track-ties and alongside of one of the rails, (shown at 30.) The apron 31 is of the same general form as the apron 15; but its apex is nearer one end than the other. It is sup ported upon a pair of parallel links 32 33, pivoted in brackets 34 35, secured to the plates 28 29, and these brackets are normally supported in a vertical position by the action of a spring 36, applied in any suitable manneras shown, leading from one arm of the lever 19 to one The lever 19 is shown single link 37 is pivotally attached to one end of the lever and to the apron 31. A cable or rod 38 leads from the opposite end of the lever 19 to the switch or signal device intended to be operated.

Acar-whecl is shown at X as running on the rail 30, and projecting from a bracket secured to the journal-box 25 is a shoe 39, adapted to engage the apron 31 and bear it downwardly. This form of shoe may be used in connection with a double-acting apron, such as shown in Fig. 1, as well as with a single-acting apron 31, in connection with which it is shown, and it will be understood that any form of shoe applicable to the engagement of trip mechanisms of this type may be employed.

I claim as my invention- 1. In a track-trip, in combination, an oscillatable apron, a swinging arm, links attached to the arm on opposite sides of its pivot and to opposite ends of the apron, each link being free to slide upon the apron in one direction.

2. Ina track-trip, in combination, an oscillatable apron. a swinging arm, and tensionlinks connecting opposite ends of the apron with the arm upon opposite sides of the pivot of the latter.

3. In a track-trip, in combination, an oscil latable apron, a swinging arm, links connecting opposite ends of the arm with opposite ends of the apron and being yieldable relatively to the apron in one direction of its movement.

I. In a track-trip, in combination, an arch form of apron, oscillatable links supporting the apron, a swinging arm, links pivoted to opposite ends of the arm and each in sliding engagement with one of the supporting-links, and a stop applied to each connecting-link and limiting its movement in one direction relatively to the supporting-link.

5. In a track-trip, in combination, an apron, a bed-plate, swinging links pivoted to the bedplate supporting the apron, a swinging arm pivoted to the bed-plate, a rod connecting the arm with one of the links and having a sliding bearing in the link, and a stop to limit its sliding movement in one direction.

6. In a tracletrip, in combination, an oscillatable apron, a swinging lever, and a tensionlink leading from each end of the apron to the lever and being attached thereto on opposite sides of its pivot.

CHARLES M. HURST.

Witnesses:

J. FRED HURST, HENRY BRoDnR.

Images