Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1041393 A
Publication typeGrant
Publication dateOct 15, 1912
Filing dateMay 11, 1911
Priority dateMay 11, 1911
Publication numberUS 1041393 A, US 1041393A, US-A-1041393, US1041393 A, US1041393A
InventorsHiram C Williams, Stephen R Payne
Original AssigneeFrancis B Harrington, Hiram C Williams, Stephen R Payne
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Audible signal.
US 1041393 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)








APPLICATION FILED MAY 11,1911. LQLQS. l Patented Oct. 15,1912.

a SHEETS-SHEET 2l FWITNEssE-s: IWL.. m. Q l. i

H.- o. WILLIAMS a s. R. PAYNE.

Patented Oct. 15, 1912r 3 SHEETS-SHEET 3.





specification of Letters Patent.

' Patentedct. 15,1912.

' To all whom 'it may concern.v

Be it known that we, Hman C, Timmins and STEPHEN R. PAYNE, citizens of the United States oi' America, residing, respectively, the said lineair C. "lViLnL-iMs at the city of Utica, Uneida. county, New York, and the said STEPHEN R. PAYNE at the city of Syracuse, Onondaga count-y, N ew York, have invented certain new and useful Improvements in Audible Signals, of which the following is a specilication.

Our invention relates to a new and useful improvement in audible signals, and the object of our invention is t-o provide device adapted to` loe connected with a railroad track whereby the passage of a car upon a section Where it is-not intendedto pass will cause an audible signal to sound; together with such elements and combinations as are hereinafter more particularly set t'orth and claimed. We accomplish this object by means of the mechanism illustrated in the accompanying drawings, in which Figure l is an elevation. Fig.`2 is a plan showing the semaphore signal registering clear, Wit-ha car on the block section; Fig. 3 isa plan showing the semaphore signal at danger, with no car'on the block section. Fig. 4- is a plan showing the semavphore at danger*7 with a car on the block section, the audible signal sounding. Fig. 5 shows the semaphore clear with a car on theblock section and another one just leaving same. Similar letters refer to similar parts throughout the several views.

Many accidents` have occurred be lanse of the engineer omitting to stop even when the danger signal is difplayed. Sometimes this disobedience ot ials is the result ot carelessness; sometimes the signal is nQt seen or is misunderr-,toefl, and het infrequently it is unheeded intentionally.

The. object. ci' the present invention is to cause a shrill penetrating whistle, alarm or other sound which will be readily and distinctly heard abrite thenoise and commotion attendant. upon the moving train. This will not only recall to the engineer and occu- 'pants of the eab that a signal hasI been passed, but all ot the crew and, indeed, the ,passengerson the train will be appnsed .of the fact that the signal is being ignored. Ve also provide for sounding a signal when fha semaphore shows a clear track, provid-- ing there is still a train on the electric track circuit at the time that another train is approaching the same.

The track circuit, A, is composed of the rails, a, Z), insulated at c, c, and (l, (l, from the rails, C, C, and D, D. rlhe track circuit, A, is eleetrilied by means the battery, l, connected by wire, e, to the rail, ZJ, and by .wire to the rail a. The magnets B G and H, which may be placed in the relay box, J, Fig. l, with battery, 2, battery, 3, magnet, L, solenoid, M, and semaphore switch, N, are connected up as follows: The

magnet, B, is connected by the wire, E, to

the rail, a, and 'by wire, F, to therail, b.

From the-battery, i2, the wire, g, leads to the armature, O, which is so mounted that when the current, is passing through the-magnet, B, the armature, t), will be drawn toward the magnet and make connections with the wire, L, leading to the magnet, H. But when the current is not passing through the magnet, B, the armature, will engage the wire, y', leading to theV armature, l), operated by the magnet, Gr. The armature, l), is connected with the wire, c, leading to the contact, R, with which the semaphore switch N, is adapted to engage.. The wire, 7c, also connects with themagnet, G, by the wire,

m. The battery, 2, is connected with the wire, n, which leads to the magnet, Gr, and also to the magnet, H, and the wire, p, connects the wire, g, ,near the battery, 2, with the armaturc,.S, adjacent to the magnet, L.

The wire, s, connects the semaphore switch, N, with a Contact piece, T, with which the armature, S, engages when operated upon by the magnet, L. rlhe magnet, L, is connected in a track circuit of a section in advance ot the section controlling magnet, B. fr wire, 4, connects track, D, to magnet, L, 'and the track, C, is connected with said magnet by means of a wire, 5. The wire, g, has connected with it a4 wire, V, which leads to the contact, W', with which the armature, Vi', engages. The other end of the armature, l. is connected by the wire` X, with the wire, L.

The battery, has a wire, 3, which leads to the electromagnet, und another wire, 7, leads to the Contact, olf :i riu..ture, f), of the magnet, H, the armature, il, being also conuecteilliy means of the wire, l0, with the electromagnet, M. The elei'iromagnc, M, operates the lever, U, to' close the valve, Y,

Z', by means ot the valve, Y, leading to the' megaphone, 17, and is an illustration of the means for sounding an alarm', but 1s not 1ntended to be a limitation upon our inventiony because any means for sounding an alarm. which is put into operation by substantially, the same devices that we have shown, will come within the spirit of our invention.

In Fig. 2 the semaphore signal, 12, shows the track to be clear. 18, represents a loco* motive on the track circuit going in the direction of the arrow. IVe will now follow the circuits in our apparatus when the conditions are those shown in Fig. 2. From the battery, 1, a current passes by wire, f, to

rail, a, thence to locomotive, 18, crossing to rail, b, to wire, e, to battery, 1. The magnet, B, has been short circuited by the locomotive, 18. The armature, O, of the magnet, B, therefore rests upon the wire, j. The circuit from the battery, 2, will be by wire, g,

Wire,'p, armature, S, contact, T, to semaphore switch, N, contact, It, wire, c,'w1re, m, magnet, G, wire n, to the battery. The curvrent fromthe battery, 2, also passes through wire, g, to wire, V, armature, W, wire, X,

' wire, L, to `imagnet, TH, to wire, n,'to the battery, energizing magnet, II, and closing armature, 9, and places in circuit with battery, 3, the electromagnet, M, which holds the valve, Y, in position in the pipe, Z, preventing the sounding of the signal. The magnet, L, acts upon the armature, S, keepingeit closed because of the battery, 20, connecting the tracks, C and D, beyon'd the track circuit, A. It will thus be seen that the track being clear andthe semaphore sigmagnet,- H, picks, u

nal showing it to be clear, there is no signal sounded, when the locomotive, 18, is on thc track circuit.

In Fig. 3, we show the semaphore signal,

12, at danger, which opens the connectionv between the contact, R, and the armature, S, because of the opening of the semaphore switch, N. The locomotive, 18, not being in the track circuit the battery, 1 sends acurrent through the magnet, B, and closes the armature, O, and the armatures, P and W, are open because the switch, N, is open and the current from battery, 2, passes to the armature, 9, and passes bv means o wire, h, armature, 0, andv wire, g, back .to battery, 2. Thus the electromagnet, M, will be vcharged and the In Fig. 5 we show the scmaphorel'signal clear with `the locomotive, 18, on the track circuit and a locomotive, 19, having just left the track circuit. The whistle or signal is now sounded for the reason that the locomotive, 19, short circuits the magnet, L, which breaks the connection between the contact, T, and armature, S, which prevents the magnet, G, from being charged lby battery, 2, and therefore allows the armatures, P and V, to break connection with their respective contact points, and the locomotive, 18,-short. circuiting the magnet, B, the magnet, H, is prevented from being magnetized, whereby the electromagnet, M, is `demagnetized and the valie, Y, opens. i We do `not wish to be limited to the wiring or electrical connectionslillustrated, nor to the means for making an audiblesignal, because these "devices may be changed" and diversified without departing from the spirit of our invention.

lVhere we have referred we of course mean to include, beside the, locomotive, all the cars that aremattached thereto. It is apparent-that the audiblesignal will continue to sound as long as thetrain is passing over the track section, contrary to the requirements shown by the semaphore.

lVhat we claim as our invention and desire to secure by Letters lPatent is:

1. A track divided linto blocks; a semaphore signal and an audible signal; electromagnetic mcans controlling said audible s ig-' nal; means controlled by the presence of a train on the block adjacent' said signals for closing a circuit through said electromagnetic means when the block is clear; means controlled by the semaphore and the presence of a train on the block inl advance for closing another circuit through said electromagnetic means when the semaphore is at clear and the .block in' advance is unoccupied, and to break said circuit when either the signal is at danger or the block in advance is occupied, whereby the electromagnetic means will' be denergized to sound the audiblefsignal whenV a train is on the first mentioned block section and the signal is at danger or the signal is at clear and the block section in .advance is occupied.

tblccgmotive, 18,

clear; means controlled by the presence of a another circuit through said .electromagnetic electromagnetic Vmeans will be denergized 2. A track divided into blocks; an 'audibles signal electromagnetic means controlling said audible signal; means controlled by the presence of a train on the block adjacent said signal for closing a circuit through said electromagnetic means when the block isv train on the block in adva'nce for closing means when the `block in ladvance is unoccupied, and to break said circuit when the block in advance is occuped,whereby the Copies of this patent may be obtained for ivecents eachrby addressing th'e Washington, D. 0.,

to sound the audible signal Whenia train is on the first mentioned block section and tle l5- block section inadvance is occupied. In testimony whereof We have a'ixed our signatures in presence of two Witnesses.'


Witnesses as to Hiram C. Williams:l

MORGAN `B. GARLOGH, I S. ELIZABETH AMES. Witnesses as to Stephen R. Payne:


Commissioner of Entente

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3725886 *Feb 9, 1972Apr 3, 1973Consulting Specialists IncFluid-powered alarm system
US5131612 *Dec 7, 1990Jul 21, 1992Westinghouse Air Brake CompanyArrangement for positively determining the actual sounding of a warning horn on a railway vehicle
U.S. Classification246/54, 246/217, 116/112
Cooperative ClassificationB61L29/286