US469927A - Railway-switch signal - Google Patents

Railway-switch signal Download PDF


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US469927A US469927DA US469927A US 469927 A US469927 A US 469927A US 469927D A US469927D A US 469927DA US 469927 A US469927 A US 469927A
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    • B61L3/00Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal
    • B61L3/02Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/04Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling mechanically


I L) 2 Sheets---Sheet 1,.
' No: 469,927. Patented Mar. 1, 1892,
I WWW m 6%? @Mwwwg (No Model.) 2 Sheets-Sheet 2.
No.469 ,927. v Patented Mar. 1,1892.
SPECIFICATION forming part of Letters Patent No. 469,927, datedMarch 1, 1892. Application filed an ary 2, 1891. Serial No. 376,474. (No model.)
To aZZ whom it mag concern:
Be it known'that I, EDWIN D. BANGS, a citizen of the United States, and a resident of Milwaukee, in the county of'Milwaukee, and
in the State of Wisconsin, have invented certain new and useful Improvements in Railway-Switch Signals; and I do hereby declare that the following is a fulljclear, and exact description thereof.
My invention relates to appliances for indicating the position of railway-switches; and it consists in certain peculiar and novel features of construction and arrangement, as hereinafter described and claimed.
In the accompanying drawings, Figure 1 is a plan view of a main railway track' and switch with myimprovements applied thereto. Fig. 2 is a side elevation of the same, a locomotive-engine being indicated in position to operate the signal. Fig. 3 is a detached detail view of the signal-operating lever and its support.
The object of my invention is to provide means whereby as a locomotive approaches a switch the position of the latter shall be automatically communicated to the engineer by a signal upon the engine, thus avoiding all liability of accidents from misplaced switches. This result I attain by virtue of the construction which I will now proceed to describe.
In the said drawings, A A indicate the rails of a main track, and B B the switch-rails of a spur, siding,branch, or similar track leading from the main track.
0 designates a switch-stand, which may be of any suitable or preferred form, and c designates the usual rod which connect-s the switch-rails with the switch-lever, so as to cause the latter to lIlOVGIhB said switch-rails into open and closed position, as desired.
Upon oneof the ties (l, adjacent to the switch, is pivoted at one end a horizontal lever D, and just loyond this pivotal point the said lever is connected to one end of a rod (1, the opposite end of which is connected to the free end of one or the other of the'movable switch-rails. To the opposite or free end of the lever D is connected one end of a chain, rope, or other flexible connection 6. This chain or connection extends around and beneath a number of sheaves e, which are preferably supported in standards E, located at one side of the main track, and the opposite end of said flexible connection is attached, either. directly or intermediately, to an operating-lever F above the lower end of the latter, substantially as shown in Fig. 2. This lever F is preferably pivoted at its lower end, as at f, upon a base-plate G, which is secured atone side of the main track, usually upon one of the ties d, at a considerable distance in advance of the switch, and the flexible con nection is preferably attached to a bail F,
shown in Fig. 2, while when the switch isclosed the spring will depress the lever into horizontal position. Let I designate a locomotive-engine. Upo
some fixed part of the engine, preferably one of the step-hangers j, is pivoted a bellcrank lever K, the upper arm of which is connected to the lower end of a rod 70, the upper end of which rod is connected to a suitable valve 70', the opening of which admits steam to a whistle L on the cab; The lower arm of the bell-crank K occupies such a position as to strike the upper end of the lever F as the engine passes the latter, and is rocked by said lever, while also vibrating the same in one direction or the other, as indicated by the arrows in Fig. 2. Thus when approaching the switch should the latter be accidentally left open the whistle will be sounded, so as to warn the engineer to stop the train, and thus prevent accident, while if the switch is properly closed no signal will be sounded and the engineer will thus know that it is safe to proceed past the switch. There should be, of course, a second bell-crank K upon the opposite side of the engine, with a rod 70, where thestep-hangers are used as supports for the signal-operating devices upon the engine; butI do not confine myself to this precise location of these devices. It is also to be understood that I contemplate sounding the signal also from the usual whistle M of the engine, and, furthermore, that I contemplate the use of a bell, gong, or visual signal, or both, in lieu of the aural signals previously mentioned. I Wish it also to be further understood that the arrangement of the track connections may, if preferred, be so varied that the lever F will be raised when the switch is closed, which would be accomplished by changing the lever D from the first to the second order and arranging the rod and flexible connection accordingly.
Other changes in details of construction may be adopted without departing from the essential spirit of my invention- Having thus described my invention, what Iclaim as new therein, anddesire to secure by Letters Patent, is
1. An improved switch-signaling mechanism comprising a movable switch-rail, a vertically-movable arm pivotally supported adjacent to the track-mil, a semicircular standard or guide for said arm provided with a spring for normally depressing said arm, and afiexible connection between said arm and said movable switch-rail and operating inopposition to said spring, whereby a movement of said rail will set the lever in operatlve position, substantially as described.
2. An improved switclrsignaling mechanism comprising a vertically-movable arm pivotally supported upon a base-plate or frame adjacent to the track rail, a semicircular standard or guide for said arm, apivoted horizontal lever, a rod connecting said horizontal lever with a movable switch-rail, a spring on said standard for normally depressing said vertically-movable arm, and a flexible connection interposed between said verticallymovable arm and said horizontal lever and operating in opposition to said spring, whereby a movement of said switch-rail shall set the vertically-movable arm in operative position, substantially as set forth.
3. The combination, in a switch-signaling device, of a vertically-movable arm pivotally supported adjacent to the track-rail upon a base-plate or frame, a semicircular standard or guide on said base-plate or frame provided with a spring for normally depressing said arm, a flexible connectioninterposed between said arm and a movable switch-rail and op-
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