US267369A

US267369A - Railway-signal

Info

Publication number: US267369A
Authority: US
Publication date: 1882-11-14
Anticipated expiration: 1899-11-14

Description

2 Sheets-Sheet,- 2.

J. W.- PURSLOW.

RAILWAY SIGNAL (No Model.)

Patented Nov. 14, 1882.

UNTTT STATES PATENT TTTcn.

JOHN WV. PURSLOVV, OF DURANGO, COLORADO.

RAILWAY-SIGNAL.

SPECIFICATION forming part of Letters Patent No. 267,369, dated November 14, 1882.

Application filed May 15,1882, (No model.)

To all whom it may concern Be it known that 1, JOHN W. PURsLoW, a citizen of the United States of America, residing at Durango, in the county of La Plata and State of Colorado, have invented certain new and useful Improvements in Railway-Signals, of which the following is a specification.

My invention relates to improvements in railway-signals.

The object of my invention is to provide an alarm-signal for use at the crossing of a wagonroad and railroad, so constructed and arranged that an alarm is automatically sounded at the crossing by an approaching train from either direction, warning passing teams of the danger therefrom. l attain this object by the mechanism shown in the accompanying drawings, in which Figure 1 is a plan of my improved alarmsignal. Fig. 2 is a side elevation of the same. Fig. 3 is a sectional elevation taken on the line 00 a; in Fig. 1. Fig. 4 is a sectional elevation taken on the line 3 you Fig. 1.

Similar letters refer to similar parts throughout the several views.

In the said drawings, A A represents the main frame of the machine, which is to be located at the road-crossin g and inclosed within ahouseorbox. Slidinglongitudinallythrough the main frame A A, in suitable bearings in the ends thereof, is a sliding bar, B, provided on its under side with a rack, a, engaging with a pinion, b, secured to a shaft, 8, journaled at each end in suitable bearings, e e, in the main frame A A.

Secured on the shafts, near the middle of its length, is a ratchet-wheel, R, with which engages a pawl, p, on a gear-wheel, G, which turns loosely on the shaft 8 and meshes with a gear-wheel, G, on a shaft, 8, also journaled at each end in suitable hearings on the main frame A A, and provided with a star-wheel, O, the arms 0 of which strike one end of the vibrating lever E, the other end of which carries the strikerf, which strikes the gong F, secured to the lower part of the main frame A A.

The sliding bar B is connected at each end to leversD and D, pivoted respectively to the brackets g and g on the main frame A A, in such a manner that when their lower ends are drawn outward the sliding bar B is forced back, compressing a coiled spring, a, coiled thereon. The lower ends of the levers D and D are connected by means of a cable, m, or its equivalent, to the oscillating levers L and L. These oscillating levers L and L are to be placed along the railway-track four or five hundred yards each way from the main frame A A, with the cable in running underground or strung on posts or poles above ground.

The levers L L may beinclosed by suitable boxing to protect them from the weather, the ends I being left projecting sufficiently to be struck by a bracket or projection placed on 'the locomotive for this purpose.

The operation is as follows A train approaching in either direction strikes the end I of levers L or L, and through the agency of the cables at and levers D or D forces back the sliding bar B and compresses the spring a, the shaft 8, by reason of the ratchet-wheel R and pawl p, turning loosely in the gear G. The projection on thelocomotive havingpassed the lever L, the recoil of the springn forces back the sliding bar to its original position and sets the lever L L for the next train. The rack a, engaging with the pinion b,revolves the shafts and ratchet-wheel B, which, by reason of the pawl 19, rotates the gear G, and through the agency of gear G, star-wheel c, and the vibrating lever E sounds an alarm on the gong F. The gong is only sounded by a train approaching the crossing. Atrain going in the opposite direction, striking the levers L L, merely tilts them back without any action on the machine, after which they are again brought into position by a spring, 0.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a railway-signal, a sliding bar, B, having rack a and a spring,n,in combination with shaft .5, having pinion b, ratchet-wheel R, and gear G, with pawl 19, substantially as shown and described.

2. In a railway-signal, the sliding bar B and spring a, in combination with the levers D D and L L and means of connecting the same, substantially as described and shown.

3. The combination of the sliding bar B, having rack a and spring a, shaft 8, pinion b, ratchet-wheel B, pawl 1), gears G G, star-wheel 0, vibrating lever E, and gong F, substantially as shown and described.

IOC

4. The combination of the levers L L and l In testimony whereof I afiix my signature in presence of two witnesses.

JOHN W. PURSLO\V.

Witnesses:

JOHN P. WYNN, R. H. MCFADDEN.