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African American inventor Charles S.L. Baker and an assistant standing behind the Heating (Radiator) !!….That They Invented…!!!



African American inventor Charles S.L. Baker and an assistant standing behind the Heating (Radiator)




Publication number US718071 A
Publication type Grant
Publication date Jan 13, 1903
Filing date Aug 25, 1902
Priority date Aug 25, 1902
Publication number US 718071 A, US 718071A, US-A-718071, US718071 A, US718071A
Inventors Charles S L Baker
Original Assignee Charles S L Baker
Export Citation BiBTeX, EndNote, RefMan


Electromechanical automatic signaling and collision-preventing device.
US 718071 A

Description  (OCR text may contain errors)

– No. 718,071. PATENTED JAN. 13, 1903.


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SPECIFICATION forming part of Letters Patent No. 718,071, dated January 13, 1903.

‘ Application filed August 25, 1902. Serial No. 120,951. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES S. L. BAKER, a citizen of the United States, residing at 2616 Locust street, St. Joseph, in the county of Buchanan and State of Missouri, have invented certain new and useful Improvements in Electromechanical Automatic Signaling and Collision and Wreck Preventing Devices; and I do declare the following to be a full, clear, and exact description of the invention,’such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The object sought by me is to provide an automatic electromechanical signaling and recording device to be used in connection with locomotives and railway-rails and which is adapted to sound or give warning to locomotives moving in any direction at stations and railway and public-road crossings, and at the time of signaling make record thereof.

I accomplish my object by means of wires and suitable contact-boxes having connection with the rails and the wheels or brushes attached to the locomotives, the wires and rails being connected with banks of electrical batteries forming complete electrical circuits with bells and signals placed in the locomotives and stations and at railway and publicroad crossings.

I attain my objects by the mechanism illustrated in the accompanying drawings, in which 7 Figure 1 is a perspective of a railway-track and wire and contact-boxes, a railway or public-road crossing post and its gong and electrical wires, a station, a locomotive provided with brush or press wheels, the press-wheel being shown pressing-on a contact-box as the locomotive passes over. Fig. 2 is a ground plan of the parts shown in Fig. 1 with the 10- comotive, except the bumper-timber, pilot, and press-wheel, omitted. Fig. 3 is an interior view of the locomotive-cab as shown from the rear, showing the alarm-bell, the electric drop-switch, the electric lamp, wires and lamp-battery, and also the brush-wheel beneath the cab. Fig. 4. is a verticalcross-section ties at any desired distanceapart.

of the brush-wheel and contact-box at the contact-switch and the rail and its connection with the box. Fig. 5 is alongitudinal elevation of the contact-box, showing all of its interior mechanism. Fig. 6 is a longitudinal cross-section of the contact-box, also showing interior parts of the box and the door thereto. Fig. 7 is a front view of the recording-box, showing the electric drops, pencils, and the recording-paper; and Fig. 8 is an end view of said recording-box, showing the rollers, wires, and a drop and pencil.

Similar letters refer to similar parts throughout the several views.

In the drawings, D represents one of the rails of a railway-track, and D D the ties.

B is a railway-station, in which there is a bank of batteries H, and S is a post ata railway or public-road crossing.

O (J are contact-boxes set on the ends of the These boxes are each preferably about four feet long and eight inches wide and are set longitudinally with the track and as near thereto as may be without interfering with the wheels of the locomotive. The top 0 of each box is constructed partially convex, and its ends and sides are flanged, as shown in Figs. 4 and 5. Attached to said top there is a contact-bar d, connected to said box by a pivot e, the other end of the bar being free to move up and down.

F’is a wire extending along on the ends of the railway-ties and through boxes 0 C. This wire has electrical connection at point J with the bank of battery-cells H.

A is a wheel carried by a bar or hanger A, which is bolted to the end of the locomotivepilot bumping-timber A. The oflice of this wheel is to press down on the top of contactbox 0. Being thus pressed, bar (:1 is forced down between contact-prongs f f, and connection is formed between wire F and rail D through said prongs f f and through wire K, which connects box 0 withsaid rail D.

R is a spring attached at its lower end to thebottom of box 0. This springis capable of sustaining a weight of three hundred pounds, and its office is to instantly return top 0” and bar d to their nomal position when wheel A has passed off of said top, thus disengaging bar d from prongs ff and breaking the electric circuit. Box 0 is also provided with lugs Q Q to provide points for attaching wires and switches and prongs ff. Pivoted to one of these lugs is a short connecting-bar h, adapted to be operated by hand in the same manner as an ordinary knife-switch. When this bar is closed, it engages prongs b 1), thereby connecting lugs Q Q, which completes the circuit. Access is had to said bar or hand switch h through a side door 0 in said contact-box O, and it will be readily seen that in case of a train wreck or accident any member of a train crew can signal to an approaching locomotive and also give notice to a station within the circuit of the accident.

L is a brush-wheel which may be attached to the floor of a cab, as shown in Fig.3, or at any suitable point.

V is an electric lamp connected to an electric drop-switch W. When drop-switch W falls, it may expose a picture of a locomotive. At the same instant a graphophone may announce the approach of the locomotive Wires run down from drop W and lampVto a storage battery E, placed under the engineers seat.

T is a bell. Wires 2% i run down under the engineers seat and through the cab-floor. One Wire connects one side of the bell to brush-wheel L and thence through the wheel to rail I and thence to battery H. The other wire is attached to the locomotive-frame at any convenient point, and passes thence through the wheels to rails D, thence through contact-box C to wire F and into battery H, forming a complete circuit, ringing the bells of all locomotives and stations within the circuit. Metal strip I is laid parallel with rail D, but alongside the opposite rail of the track. It is continuously in circuit, having constant connection with battery-cells H.

In the station at the side of the bell p, which is connected by wire G to metal strip I and by wire G to rail D, there is a time registering electric drop-box X, the drops being numbered to conform to the several sections of the railway. This box X registers the speed, locality, and direction of travel of the locomotives within its circuit. The box may also be placed in a locomotive-cab, in which case it is adapted to automatically register the precise moment at which the road-crossing gong is rung and at the same instant record the number of the road-crossing. This registering-box consists of a series of electric drops X X, numbered to conform to the several sections of the railway, and it is also provided with rollers R R, carrying paper P, ruled in hours, minutes, and seconds, upon which pencil P makes record whenever a drop X falls. Connection is bad for one side of all of these drops with metal strip I through bell-wire G at point G, and for the other side of all of these drops connection is had to wire F through box 0 at Y. The connection for this side of the drops must be made by a separate wire Z for each drop to the binding-post B of one of boxes 0. When the bells are rung from boxes 0 C, Fig. 2, connection is had with rail D by means of a wire M passing under metal strip I and connecting with rail D at N and with wire F by means of wire 0, passing under strip I and connecting with wire F at points P P.

A locomotive having been started from a given point, wheel A passes onto and depresses the top 0 of box 0, causing bar dto engage with prongs ff, thereby forming connection between wireF and rail D and Wires tt through brush-wheel L to metal strip I, which completes a circuit. This causes every bell in that circuit to ring whether in station, locomotive-cabs, or elsewhere. At the same time this circuit will actuate the electric drops of the registering devices in the station or stations and at the same instant will actuate the drop that lights the lamp in the locomotive-cab. When the locomotive reaches the vicinity of a railway or a public-road crossing and wheelA passes onto and depresses the top 0 of box 0, it causes bar 01 to engage with prongs ff, thereby forming connection between wire F and wires K K and the metal strip I, thus forming a complete circuit and causing gong S to ring.

What I claim, and desire to secure by Letters Patent, is-

In an automatic signaling, collision and wreck preventingdevice the combinationlwith a bank of batteries, of a battery-wire and the track-wire F forming connection at point J, the contact-box C and its pivoted top 0’, spring R, bar 7?. and door 0, the lugs Q Q, therein and their binding posts B B to which said track-wire is attached, the duplicate prongs ff and the bar d adapted to contact therewith, rail D and wire K forming connection between it and one of said lugs, a press-wheel A attached to a locomotive at its side and adapted to bear down upon top 0 as the locomotive passes and to press bar d down between and into contact with prongs ff thus forming a circuit, a wire 25 forming connection with rail D by means of the metal framing and wheels of the locomotive, a bell T connected with the upper end of said wire 6, drop-box W electrically connected with said bell T, wheel and hanger L and wire 15 forming connection between it and bell T, and metal strip I having connection with battery H by means of battery-wire, thereby completing the entire circuit, station-bell p which is rung at the same instant by means of connection with metal strip I by wire G and with rail D by wire Gr, time-registerin g dropboxes X X operating at the same instant and connected with metal strip I by means of bell-wire G and with box 0 by means of wire Z, gong S on railway or public-road crossing posts S, also adapted to be rung at the same instant, and wire K connecting said gong with box 0 and wire K connecting it with metal strip I, lampVin the lo comotivecab adapted to be lighted by connection with In testimony whereof I affix my signature storage battery E when drop W falls formin presence of two Witnesses.

ing connection, rollers R R”operated by a clock, ruled paper P carried by and on said CHARLES BAKER rollers, drop-door X and its pencil P, all Witnesses:

substantially as described and for the pur- GEORGE W. JOHNSTON,

pose specified. 1 MOSES D. LAWRIE.


Cooperative Classification B61L3/106
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