Title of Invention

"ABNORMAL RIDING DETECTOR WITH UNLIMITED RECHARGING FOR RAILWAY VEHICLES"

Abstract

This invention relates to abnormal riding detector with unlimited recharging for railway vehicles characterized in that a hosing (1) having guides and a pair of lateral masses (7) therein movable to open the rubber disc (5) pressed against opening of a passage (10) provided in the sensing pressure chamber (15), sensing pressure chamber being connected to another sealed pressure chamber (20) through passage (14), the brake pipe connector (24) being secured to any side of the pressure release valve housing (21) with disc to atmosphere, and diaphragm positioned in vertical or horizontal plane, said sensing pressure chamber and the sealed pressure chamber are charged with compressed air of the brake pipe of the railway locomotive or vehicle, through a pressure regulating valve (28-31, 41,43) and non-return valve (32-34), pressure release valve (21-23 & 52) being provided on the side of a housing.

Full Text

This invention relates to abnormal riding detector with unlimited recharging for railway vehicles. The device is used to stop a train soon after one or more of its vehicles/locomotives have derailed without human attention, so as to minimise damage to Railway track, vehicles, other railway assets, commodities or passengers being carried in the vehicles. Since derailments of railway trains can neither be predicted nor eliminated the main object of the present invention is to propose a means to overcome this disadvantage to a great extent. Therefore the main object of the present invention is to propose a device to initiate braking action, to stop the train in shortest possible time and distance after any abnormal riding is experienced by the vehicle(s) due to initiation of derailment or otherwise, irrespective of human observation and response. According to this invention there is provided abnormal riding detector with unlimited recharging for railway vehicles characterized in that a hosing having guides provided in the side of said housing for accommodating a movable spring loaded vertical mass and a pair of spring loaded lateral masses therein movable to open the rubber disc pressed against opening of a passage provided in the sensing pressure chamber when any of the vertical or lateral masses experience vertical or lateral accelerations higher than the threshold value so as to drop the pressure in the sensing pressure chamber being connected to another sealed pressure chamber through passage such that to move the disc and diaphragm so as to open the brake pipe connector being secured to any side of the pressure release valve housing with disc to atmosphere, and diaphragm positioned in vertical or horizontal plane, said sensing pressure chamber and the sealed pressure chamber are charged with compressed air from the compressed air of the brake pipe of the railway locomotive or vehicle, at a low pressure through a pressure regulating valve and non-return valve pressure release valve being provided on the side of a housing to maintain a low pressure inside the device all the time. A device for use with railway trains according to a preferred embodiment is herein described and illustrated in the? accompanying device whereins Fig, 1 shows the sectional elevation of the device suitable for air braked vehicles. Fig. 2 shows sectional elevation of the device with optional means for retaining the vertical »>»«& in actuated condition. Fig. 3 shows the sectional elevation of the device according to an embodiment suited -for sensing accelerations in vertical direction only. Referring to the drawings particularly fig. 1 the device has a vertical mass 2 held movably by the force of spring 4 in a guide 1A provided in the housing i, either of them having anti--frictiion coating, against opening of sensing pressure chamber seat 26 and rubber disc 5, fixed in sensing pressure chamber housing 15. The lateral masses 7 being held movably in guides 1A in housing 1, either of them having anti friction coating, against end covers 9 fixed on the housing 1, with springs 6, The rubber sealing disc S its mounted on the vertical mass 2 such that to be pressed against the standing pressure chamber seat 26 provided at the bottom end o-F the passage 10 provided in the sensing pressure chamber housing 15. The passage 10 is kept continuously charged with low preesure compressed air through a non return valve consisting of a spring 34, valve disc 33 and valve seat 32 provided in sensing pressure ehamber housiirig 15, A pressure regulating valve consisting of valve seat 51, valve disc 28, spring 43, spring 41, plate 31, diaphragm 30 and a spindle 29 provided in pressure regulating (PR) valve housing 27, The diaphragm 30 being kept pressed by a spring 41 in housing 15 which along with spring 41 determines the level ot pressure in the sensing pressure chamber passage 10. Valve disc 28 opens- and closes valve seat Si in PR valve housing 27 according to pressure in sensing pressure chamber passage 10. A passage 39 is provided in the housing 5 below the diaphragm 30 to maintain the constant pressure of surroundings. for regulating the pressure in sensing pressure chamber passage 10. The top end of the valve disc 28 is connected to the opening 24A passage in the brake pipe connector housing 24 through a passage 35. The sensing pressure charober housing 15, pressure regul ating valve housing 27, brake pipe connector housing 24 and sealed pressure chamber housing 16 being joined together with leak proof seals. The passage 10 in sending pressure housing 15 is connected to the sealed pressure chamber 20 through a passage 14 (dotted lines). The sealed pressure chamber 20 is provided with a compression spring 17 which presses the disc 18 and diaphragm 19 against the end of brake pipe connector 24, A pressure release valve consisting of housing 21, spring 22, end cover 52 and valve disc 23 is mounted on passage 39A provided in sensing pressure chamber housing 15. The brake pipe connector housing 24 is fixed to the pressure regulating valve housing 27 and passage 35 connects to the opening 24A in brake pipe connector housing. The side of brake pipe connector housing 24 is provided with a number of holes 40 to allow passage of air. The end of brake pipe connector housing 24 is kept closed by the diaphragm 19 due to pressure inside the sealed pressure chamber 20, The sensing pressure chamber housing 15 is fixed on the housing 1 with dust proof sealing. As shown in fig. 2 the device comprises additional optional means -for retaining the vertical mass in actuated position, until reset, once the device ia actuated an experiencing an acceleration higher than the threshold value in vertical or lateral direction. The retaining means comprises a pin 46 movably provided in a hole on side of housing 1 is provided to engage a slot, in mass 2, so that, as soon aa it moves downward due to abnorojal accelerations experiencted it is retained in that position under the force of spring 44 held between a cover 48 attached to side of housing 1 and collar/circlip 45 placed on pin 46, The pin 46 projects from side of cover 48 and is protected by a dust proof protection cover 47. The retaining means requires to be set after mounting of the device, the initial resetting means ares operated manually by pulling the plunger 46 once, after opening the cover 48 and releasing it. The device has also to be reset after actuation due to a derailment, by opening cover 46 and pulling the plunger 46 outwards and releasing it to detach the mass .2 in case of the device provided with this as shown in fig. 2. According to an option and as. shown in fig. 3 the device comprises vertical mass 2 for sensing accelerations in vertical direction only. The device is not provided with lateral masses 7,springs 6, end covers 9, bell cranks 11, pins 12 and spring 13 for sensing lateral accelerations and retraining construction is si mi 1 ar to that shown in fig. 1. The optional means for retaining the vertical mass 2 in actuated position as shown in fig. 2 can toe provided with this device al so. The? device(s) are attached to the under frame of the vehicle near each of two bogie centres in case of a 4 axle vehicle or in the middle of a two axle vehicle. The brake pipe connector opening 24A of the device iss connected to brake pipe ( not shown) of the vehicle, the brake pipe connector optionally be connected with the? brake pipe of the vehicle, through isolating valves/plates. The vehicle has a Distributor valve (D.V.) and with a drop in air pressure in the brake pipe due to actuation of the device, the D.V. starts admitting compressed air to the brake cylinder for application of brakes- on the vehicle-. The drop -in pressure in brake pipe is also sensed by the Distributor valves of adjoining vehicles through the brake pipe, resulting in application of brakes on these vehicles. Drop in pressure of the brake pipe reaches the locomotive or brake van where driver or guard can augment ths? braking effort by application of emergency brakes. In case of device, shown in fig. 2 being used, the device has to be reset by opening the cover 47 and pulling the pin 46 once to allow the vertical mass 2 to press against sensing pressure chamber seat 26 through rubber disc 5 and the sealed pressure chamber 16 gets charged with compressed air for closing the brake pipe connector 24. In case of device as shown in fig. 1 and 3, this, arrangement is not provided and the device is fully actuated only after being subjected to a few accelerations higher than the threshold valve. The device (s) is/are fixed on the under frame of & vehicle at suitable locations and brake pipe connector 24 is connected to brake pipe of the vehicle. The compressed air from the brake pipe? of the vehicle charges the sensing pressure chamber passage 1© and sealed pressure chamber 20 with air at a low pressure through the non return valve 32,33,34 and pressure regulating valve 28,29,3(3,3.1,41,43 are Si provided. The rubber disc 5 keeps the paseage 10 ssealed normally. The movement. o4 any of the masses 2 and/or 7 in the eventuality of a derailment or abnormal riding due to any other reason, resulting in accelerations higher than the threshold value, opens the passage 10 in the sensing pressure chamber housing 15 and the pressure in the seeled pressure chamber 20 drops resulting in shifting of diaphragm (19) and disc (18) inwards due to the high pressure of air in the brake pipe and makes opening for air to escape from the brake pipe through holes 40. The pressure release valve consisting of 21,22,23 end 52 maintains dust proof condition in the device while maintaining near atmospheric pressure inside. 1 CLAIM; 1. Abnormal riding detector with unlimited recharging for railway vehicles characterized in that a hosing (1) having guides provided in the side of said housing for accommodating a movable spring (4) loaded vertical mass (2), and a pair of spring loaded lateral masses (7) therein movable to open the rubber disc (5) pressed against opening of a passage (10) provided in the sensing pressure chamber (15) when any of the vertical or lateral masses experience vertical or lateral accelerations higher than the threshold value so as to drop the pressure in the sensing pressure chamber being connected to another sealed pressure chamber (20) through passage (14) such that to move the disc and diaphragm (18& 19) so as to open the brake pipe connector (24) being secured to any side of the pressure release valve housing (21) with disc to atmosphere, and diaphragm positioned in vertical or horizontal plane, said sensing pressure chamber and the sealed pressure chamber are charged with compressed air from the compressed air of the brake pipe of the railway locomotive or vehicle, at a low pressure through a pressure regulating valve (28-31, 41,43) and non-return valve (32-34), pressure release valve (21-23 & 52) being provided on the side of a housing to maintain a low pressure inside the device all the time. 2. A device as claimed in claim 1 wherein said device comprises retaining means comprising of a spring loaded pin (46) disposed in a cover and adapted to move in a hole provided on one side of the vertical housing, being provided to retain the vertical mass in the actuated position, a dust proof protection cover (47) being provided to protect said pin. 3. A device as claimed in claim 1 wherein said device comprises mass (2) in vertical direction only provided in a vertical housing guide (1A) so as to open the rubber disc (5) pressed against opening of a passage (10) provided in the sensing pressure chamber (15) when the vertical mass is moved due to vertical accelerations more than the threshold value. 4. Abnormal riding detector with unlimited recharging for railway vehicles substantially as herein described.

Documents:

699-del-1999-abstract.pdf

699-del-1999-claims.pdf

699-del-1999-correspondence-others.pdf

699-del-1999-correspondence-po.pdf

699-del-1999-description (complete).pdf

699-del-1999-drawings.pdf

699-del-1999-form-1.pdf

699-del-1999-form-19.pdf

699-del-1999-form-2.pdf

699-del-1999-form-3.pdf

699-del-1999-gpa.pdf

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