US1175704A - Automatic railway-train stop. - Google Patents

Description

R. CECCHINI.

AUTOMATIC RAILWAY TRAIN STOP.

APPLICATION FILED MAY 11. 1915.

2 SHEETSSHEET I.

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R. (2500mm.

AUTOMATIC RAILWAY TRAIN STOP.

APPLICATION FILED MAY 11, 1915.

Patented Mar. 14, 1916.

2 SHEETSSHEET 2.

E, E E E j 2 w o M W Z 45 Q 10' M m L i WITNESS INVENTORy W 13056;?

BY i I o 1 A TTORNE Y.

train is in the same failure of the usual air ROBERT CEGCHINI, OF SPRINGFIELD. MASSACHUSETTS. I

AUTOMATIC RAILWAY-TRAIN STOP.

Specification of Letters Patent.

Patented Mar. r42, rare.

Application filed an 11, 1915. Serial m. 27,296.

To all whom it may concern Be'it known that 1, ROBERT Cnccmm, a British subject, and resident of Springfield,

in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Automatic Railway-Train Stops, of which the following is a full, clear, and exact description.

This invention relatesto an automatic train stop of the class or kind which is operative when the train runs past a signal set at danger, of into a block while another block, to operate stopping or controlling devices of the locomotive, such, for instance, as the throttle valve, the engineers air brake valve, the valve controlling track sanding supply, or simultaneously all of such valves, and also, if desired, as an auxiliary brake mechanism which becomes operable in cases when by brake apparatus the auxiliary brake may be set.. 1

An object of the invention is to provide improved apparatuses or appliances for the efficient and'reliable stopping of the train under dan'ge'r conditions, by the utilization, under normal conditions, of an automatically controlled source of air under pres sure.

Another object is to so adapt the apparatus, as, in cases of emergency, to be operable by steam from the boiler in cases where the air supply fails or becomes inedective by lowered pressure thereof.

In the apparatus as here disclosed, the air operable as the motive agent for actuating the train controlling devices in cases of danger, automatically controls the steam to be used in cases of emergency, that is the steam supply pipe leading from the boiler is normally shut by a valve or cook, but which valve on the failure of the supply of the air as the motor agent is opened so that.

the steam will perform the same ofiice as that designed for the air.

Other objects of the invention are to provide improved means for the electrical control of an electric motor carried on the locomotive and which motor operatively controls the valve for the motor fluid, air or steamas the case may be which actuates the train controlling devices.

Another object is to generally simplify and improve the train stopping apparatus.

Ihe invention is described in comunction tery 13 flowing through with the accompanying drawings and is set forth in the claims.

In the drawings:-Figure 1 1s a general diagrammatic view of the device and such othervparts of the locomotive, tracks, signallng apparatus, etc., as are used in connection with the device. v1ew of the ordinary railroad trackshowmg the signal posts at intervals along the track I and also thesub-rail-located near each Signal post. Fig. 3 is an end view of a loco-- motive on its track with the signal post and sub-rail shown in their relative positions.

Fig. 4: is a detail of the switching mecha- Illim, etc., which is located in the engineers ca l The operation of the semaphore arm of thesignal iscontrolled by means of electricity supplied by a suitable battery 2 from which an extra circuit is taken oil which is controlled by a switch .3 so de- Fig. 2 is a-plan signed that when the semaphore arm is set at danger the circuit is closed and the current is free to How through wire- 4'. to subrail 5.

At aconvenient point on the locomotive is attached a collecting or contacting wheel 6 which rolls over the top edge of sub-rail 5 and to which is connected a wire 7 running to a magnet 8 and from there returning through a wire wheels 10 which roll upon the main rails 11. A. wire 12 connects these rails back to the battery 2 completing the circuit.

When the signal is set at danger and the locomotive comes opposite the sub-rail 5, the current flows from the battery2 through switch 3, wire 4, rail 5, contactor wheel 6, wire 7, magnet 8, wire 9. either one of the wheelslO to rail 11 and back through wire 12 to battery. When this current flows through ma net 8 this magnet is demagnetized or neutralized and current from batswitch 14 and magnet 15, actuates the pivoted switch 16 which closes the gap between contacts 17, 17, and allows current to flow irom battery 18 through contacts 17 to motor 19 and return.

When the motor revolves a pinion on its shaft acts with a rack to draw a rod 20 which opens valve 21. allowing air at a pressure of about 130 lbs. to flow from main reservoir A through pipe 22, check valve 23 to pipe 24. and branching oii into three cylinders 25, 26, and 27, which act to close the 9 to two small contacting keeping the steam in throttle 28, operate the brakes through the engineers valve 29 and valve 30 respectively.

If for any reason the pressure of air in the main reservoir falls below 60 lbs., the spring 31 back of piston 32 in cylinder 33 over-. comes the air pressure on the other side of piston and opens valve 34, allowing steam from the boiler to pass through pipes 35 and 36 into pipe 22, thence'through valve 21, if open, and then into pipe 24 and operating above mentioned cylinders 25, 26 and 27, as described above.

The check valve 23 apply the air sander is for the purpose of pipe 22 from getting into the main reservoir.

When steam is allowed to pass through valve 34 and into pipe 36 it also passes through pipe 37 into additional brake cyl-- inder 38 which applies the brakes upon the locomotive.

Ordinarily and for protracted periods, without exception, the operation of the en gineers brake valve will be adequate to set the brakes. a

The provision of the means including the steam cylinder 38 hereinabovejust referred to is to be considered'as a steam operated emergency brake to become automatically operable in the very rare cases when the air supply would fail or become inefiective for the usual and expected operations.

The pin 39 on end of pinion of motor 19,

1 Fig. 4, is for a crankto be applied so the the'action of magnet engineer can return the rack and its rod 20 and valve 21 to the normal position.

- Magnet 8 has a steel core and is, therefore, a permanent magnet and when there is no current in the coil of said magnet the magnetism in this core is strong enough to hold pivoted switch 16 from contacts 17 against If current does flow through magnet 8 the magnetism in the core is neutralized and then magnet 15 becomes the stronger of the two and attracts the other end of switch 16.

The switch will remain in this position unt1l the engineer opens switch 14 whichv causes magnet 15 to become inoperative and. as the current which flowed-through magnet 8 has ceased the permanent core of said magnet will again attract switch 16 toits normal position as shown, afterwhich the engineer closes switch 14 restoring the energy to .magnet 15. The reason that magnet 15 which a current is established conditions,

' .Port 40 Fig. 4, is to exhaust the air from 60 tric motor, a reservoir for compressed air, a

pipe leading from the'reservoir, a valve for said pipe, controlled by the electric motor, a pneumatic chamber to which said pipe leads, a piston in said chamber operatively connected with a locomotive controlling mechanism, electric means comprising a circuit in and including a device'subject to the operation by such current circuit for controlling said electric motor, a steam pipe, connecting into said air pipe and having a valve therefor, means for exerting a pressure in the opening direction on said valve, and means whereby said pressure exerting means is controlled by the air pressure in the reservoir. 1

2. In an apparatus of the character described, a locomotive having thereon an electric motor, a reservoir for compressed air, a

- pipe leading from the reservoir, a valve for said pipe, controlled by the electric motor, a pneumatic chamber to which said pipe leads, a piston in said chamber operatively conhected with a locomotive controlling mechanism, electric, means comprising a circuit in which a current isestablished under danger conditions, and including a device, subject to operation by such current circuit, for controlling said electric motor, a steam pipe,

connecting into said air pipe, .beyond the v reservoirand having a valve therefor, means for exert ng a 'ressure in the opening direction on said va ve, means whereby said pres sure exerting means is controlled by the air pressure in the reservoir, and a check valve provided in the pipe leading from the reservoir between the latter and the junction with said pipe of the steam pipe.

I Signed by me at Springfield,'Mass., in presence of a subscribing witness.

. ROBERT CECOHINI. Witness: G. R. DRISCOLL.

under danger

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