US1746277A - Highway-crossing protection - Google Patents

Description

Feb. 11, 1930. H. c. PRICE 1,746,277

HIGHWAY CROSSING PROTECTION Filed April 24, 1928 lmerlodcmq Relay.

b niarloc'king Relay.

STATES UNITE HARRY o. Peron, OF Youivesrown, OHIO,

' VANIA PATE NT OFFICE ASSIGNOR TO THE UNION SWITCH & SIG-2 NAL COMPANY, OF SWISSVALE, PENNSYLVANIA, A CORPORATION OF PENNSYL-- HIGHWAY-CROSSING PROTECTION Application filed April 24,

My invention relates to highway crossing protection, that is, to apparatus for protect ing the intersectionsof railwaysand highways.

1 will describe two forms of apparatus embodying my invention, and will then point out the novel features thereof in clanns.

In the accompanying drawing, Fig. 1 1s a diagrammatic view showing one form of ap paratus embodying my invention, and F g. 2

a diagrammatic view showing a modification of the apparatus shown in Fig. l and also embodying my invention.

Similar reference characters refer to similar parts in each of the views.

Referring first to Fig. 1, the reference characters 1 and 1 designate the track rails of a railway over which traffic moves in both directions. These rails are divided by insulated joints 2 to form two track sections AB and BC. A highway H intersects the railway track at ornear the point B.

Track section A-B is provided with a trackcircuit comprising a source of current 3, and one magnet l of an interlocking relay R. The other track section BG is provided with a similar track circuit including the other magnet a of the interlocking relay R. Relay B may be of any suitable type, such, for example, as the relay shown in United States Letters Patent No. 799,452, granted to W. TV. Coleman on September 12, 1905. Relay R controls a highway crossing signal S, which may be of any suitable type, but which, as here shown, is a bell. This bell is provided with a circuit which includes a battery 7, and two back contacts and 5 in multiple, of relay R, whereby the bell rings when a train is in either section AB or BG approaching the highway H, but ceases to ring while the train is receding from the highway. Thecontrol of highway crossing bells and other crossing signals by interlocking relays is well understood and need not be explained in further detail herein.

The magnet 4 of relay R is provided with a shunt path which includes a back contact 6 of the armature associated with magnet 43; and, slmllarly, magnet 49 is provided witha shunt path which includes a back contact 6 of closing of contact 6 will complete the shuntpath around magnet 4 so that the armature of this magnet will release, but will of course, not open far enough to close back contacts 5 and 6 When the train enters section BC, it will haveno effect on the armature associated with magnet 4 because this arma-- ture isalready released. When the rear end 7 V of the train leaves section A-B, magnet 4 will become energized to open contacts S and 6 and the openlng of contact 5 will cause the bell to stop ringing.- The operation during passage of a train moving toward the left will be apparent without explanation.

The auxiliary shunt path for each magnet insures that when a light engine passes rapidly from either track section into the other, the second magnet of the interlocking relay will be ole-energized before the first magnet becomes energized, and this insures that the interlocking parts of the relay will function properly. i

Referring now to Fig. 2, magnet 49 of the interlockingrelay R is connected with the track rails" of section B-G, as inFig. 1,

but magnet d is controlled by a track relay R which is included in the track circuitfor section AB. This arrangement is particularly well adapted for use when magnet P of the interlocking relay is to be controlled by devices other than the track circuit for section A-E. The circuit for magnet 4 is fron'ra suitable source of current, not shown in the drawing, through apparatus which is likewise not shown in the drawing, then through wire .11, contact 9 of relay R wire 12, front contact 8 associated with magnet 4", wire 13, windings of magnet 43, wire 14, contact 10 of relay R", and wire 11 to the other terminal of the source of current. It will be noted that this circuit includes a front con tact of the armature associated with magnet 4", so that when magnet P becomes de-energized due to a train moving toward the left entering section B.C, magnet at will also be (lo-energized. Magnet 4* is provided with a shunt path which includes back Contact 6 of the armature associated with magnet t, this part of the apparatus being exactly the same'as in Fig. 1. The operation of the apparatus shown in Fig. 2 is the same as that of the apparatus shown in Fig. 1, except that when a train is moving towards the right, bell S will start to ring as soon as the circuit for magnet 4* is opened by the device or devices to the left of section AB which control this circuit.

Although'I have herein shown and described only two forms of apparatus embfldying my invention, it-is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim is:

a 1. Apparatus for protecting an intersection of a railway and a highway, comprising interlocking relay controlled by trains,

' and means for controlling each magnet of said relay by the armature associated with the other magnet- 2 Apparatus for protecting an intersection of a railway and a highway, comprising an interlocking relay controlled by trains, and an auxlliar circuit for each magnet of said relay incln ing a contact of the armature associated with the other magnet.

3. Apparatus for protecting an intersection of a railway and a highway, comprising an interlocking relay controlled by trains, and auxiliary means for controlling one magnet of said relay by the armature of the other I magnet.

4;. Apparatus for protecting an intersection of a railway and a highway, comprising an interlocking relay controlled by trains, and a shunt path for one magnet of said relay. including a back contact of the armature. associated with the other magnet.

' Apparatus for protecting an intersection of a railway and a highway, comprising an interlocking relay controlled by trains,

and ashiintpath for each magnet of said I'elay'including a back contact of the armature associated with the other magnet.

6. Apparatus. for protecting an intersection of a railway and a highway, comprising an interlocking relay, the circuit for one magnet of said relay including a front contact of the armature associated with the other magnet, and a shunt path for the second magnet including a back contact of the armature associated with the first magnet.

7. In combination, two adjacent sections of railway track, an interlocking relay, a track circuit for one section including one magnet of said relay, a track circuit for the other section including the other magnet of said relay, and means for controlling each magnet of said relay by the armature associated with the other magnet.

8. In combination, two adjacent sections of railway track, an interlocking relay, a track circuit for one section including'one magnet of said relay, a track circuit for the other section including the other magnet of said relay, and a shunt path for each magnet of said relay including a back contact of the armature associated with the other magnet.

9. In combination, two adjacent sections of railway track,an interlocking relay, a second relay, a track circuit for one section in-. cluding the first magnet of said interlocking relay, a track circuit for the othersection including the magnet of said second relay, a circuit for the second magnet of said interlocking relay controlled by a front contact of said second relay and by a front contact of the armature associated with the first magnet of the interlocking relay, and a shunt path for the first magnet of said interlocking relay including a back contact of the armature associated with the second magnet.

In testimony whereof I aflix my signature.

' HARRY O. PRICE.

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