Title of Invention

ABNORMAL RIDING DETECTOR FOR VACUUM /AIR BRAKED RAILWAY VEHICLESWITH LIMITED RECHARGING"

Abstract This invention relates to a device for use with railway train to stop the same in case of derailment or abnormal riding of any of the locomotive or vehicle of the train. The device has a single spring-loaded mass disposed into a guide of the housing of the device at the top end thereof such that the extended central portion of the sealed pressure chamber housing disposed in the upper portion of the guide. A spring loaded mass having a rubber disc at the upper end thereof is disposed in the lower portion of the guide such that to open the passes provided in sealed pressure chamber housing so as to connect the passes with the atmosphere upon experiencing the acceleration beyond the threshold value by the device. The break pipe/train pipe connector is secured with the upper portion of sealed pressure chamber housing such that to be closed by means of a diaphragm provided in the sealed pressure chamber of the sealed pressure chamber housing. The air pressure recharging means are connected to the extended portion of the sealed pressure chamber housing such that to recharge the sealed pressure chamber. A pressure release valve is provided near the upper end of guide housing.
Full Text This invention relates to abnormal riding detector for vacuum/air braked railway vehicles with limited recharging. This device is used to stop the train in case any one or more of its locomotives or vehicles is subjected to abnormal riding, as generally encountered in case of derailment of a vehicles fully or partially. The device is used to stop a train soon after one or more or its vehicles/locomotives have derailed without human attention, so as to minimize damage to Railway track, vehicles, other railway assets, commodities or passengers being carried in the vehicles.
Since derailment 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 for vacuum/air braked railway vehicles with limited recharging comprising at least a single spring loaded mass disposed into a guide of the housing of the device characterized in that, a sealed pressure chamber housing being connected to the housing of the device at the top end thereof such that the extended central portion of the sealed pressure chamber housing being disposed in the upper portion of the guide, a spring loaded mass having a
rubber disc at the upper end thereof being disposed in the lower portion of said guide such that to open the passes being provided in said sealed pressure chamber housing so as to connect the passes with the atmosphere upon experiencing the acceleration beyond the threshold value by the device, a break pipe/train pipe connector being secured with the upper portion of said sealed pressure chamber housing such that to be closed by a diaphragm provided in the sealed pressure chamber of the sealed pressure chamber housing, air pressure recharging means being connected to the extended portion of the sealed pressure chamber housing such that to recharge the sealed pressure chamber, a pressure release valve being provided near the upper end of said guide housing.
In accordance with this invention the device has spring loaded mass disposed in a vertical housing. A sealed pressure chamber housing is secured with the top end of said vertical housing. The sealed pressure chamber housing has a passes the lower end of which is provided with a valve sheet such that to be restricted on a rubber disc mounted on the top surface of the mass upon experiencing the acceleration more than the threshold value by a vertical mass. The upper end of the passes is open in a sealed pressure chamber having a diaphragm provided with a disc such that to open/close the
inner end of the tray/brake pipe connector to the atmosphere BO as to facilitate the application of the brakes to stop the vehicle. The train/brake pipe connector is adapted to be secured with the train/brake pipe of the train. A plurality of holes are provided in the chamber to which the brake pipe/train pipe is secured to connect the tram/brake pipe to the atomosphere. Recharging means are provided with die extended portion of the sealed pressure chamber housing fix- recharging the device. The recharging device has an air reservoir housing secured with the extended portion of the sealed pressure chaniber housing. A spring loaded spindle is disposed within said air reservoir housing such that to be actuated by recharging pin provided in a recharging pin housing secured on the top surface of the extended portion of the sealed pressure chamber housing. A one way valve is provided with said air reservoir housing to provide the air supply into the housing to maintain a particular pressure in the air reservoir housing. A pressure release valve is provided near the upper end of the vertical housing to release the excess pressure treated in the upper portion of housing.
A device for use to stop a running train in case of a derailment of a vehicle according to a preferred embodiment is herein described and illustrated in the accompanying drawings wherein:
Fig.1 shows the sectional elevation of the device suitable for vacuum sod air braked
vehicles for sensing vertical accelerations only Fig. 2 shows the sectional elevation of the device suitable tor air and vacuum braked
vehicles for sensing vertical acceleration only according to an option. Fig. 3 shows the sectional elevation of the sir braked vehicle for sensing verticle
acceleration according to an option.
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Fig.4 shows sectional elevation of the device suitable for air and vacuum braked
t
vehicle for sensing abnormal accelerations in lateral and vertical directions. Fig. 5 shows the sectional view of the automatic locking means for use with air braked
vehicles according to an option. Fig. 6 shows sectional view of the optional means for isolating the device manually in
case me device becomes dysfunctional.
Referring to drawings particularly fig. 1 the device has a housing 1, which is adapted to be secured with the underframe of a railway vehicle (not shown) and with built in guides 1A in vertical direction. A vertical mass 2 is disposed movably in the vertical guide 1A of housing 1 with a spring placed between bottom of mass 2 and horizontal side of housing 1. The mass 2 is provided with two guide rings 4. A sealed pressure chamber housing 8 is secured over the top of housing 1 with a gasket/seal in
between. The sealed pressure chamber housing 8 has a passage 7, one end of which is provided with a valve seat 6 and the other end is connected to sealed pressure chamber 8A. A rubber disc 5 mounted on top of vertical mass 2 presses against die valve seat 6 and keeps passage 7 closed in a airtight manner. The sealed pressure chamber housing 8 is provided with a diaphragm 9 bonded to disc 13 placed movably in the sealed pressure chamber 8A, and diaphragm 9 being secured with a ring 10. The brake pipe /train pipe connector 11 is fixed on any side of bowing 8 so that one end of it is closed by the diaphragm 9 and a spring 12 is provided over the pipe connector 11. A plurality of holes 14 are provided in brake pipe/ train pipe connector 11 and 14 A in sealed pressure chamber housing 8. A sealed pressure chamber 8A is connected to an ah* reservoir housing 16 through a passage 15 provided in an extension of sealed pressure chamber housing 8 on any side. The air reservoir housing 16 is fixed on any aide of the extension of sealed pressure chamber housing 8. A rubber valve disc 19 mounted on spindle 17 presses against valve seat 18 provided with the extension of the sealed pressure chamber housing 8 under the force of a spring 20. A diaphragm/bellow 21 is fixed between recharge pin housing 25 and extension of sealed pressure chamber housing 8. A recharge pin 23 is provided movably in the housing 21 and covered with a flexible protection cover 24 secured to housing 21 with ring 26. A spring 22 is provided to keep recharge pin 23 pressed against housing 25. A nonreturn air-filling valve 27 is
provided with a rubber washer 29 and sealing nut 28 and the whole arrangement is covered with protection cover 30 fixed on the aide of air reservoir housing 16. A pressure release valve consisting of housing 31, valve seat 32, spring 34 and valve disc 33 is mounted on an opening on any side of housing 1. A sealed pressure chamber 8A is provided with a non return air filling valve 27 of automobile pneumatic tyre type fixed on any side of air reservoir housing 16. After the device is mounted on the vehicle as described later, the recharging pin 23 is pressed once for a few seconds to charge the sealed pressure chamber with air/gas which closes the end of brake pipe/ train pipe connector 11 with diaphragm. Arrangement for isolating the train pipe/brake pipe connector from atmosphere manually is provided on a side of sealed pressure chamber housing 8. A bellow/diaphragm 35 is fixed to a recess in sealed pressure chamber housing 8 with a securing ring 39. A screw 36 is provided with a lock nut 37 and a handle/wheel 39 in a threaded hole on side of the housing 8 coaxial with diaphragm 9. The housing 1, sealed pressure housing 8, Air reservoir housing 16, recharge pin housing 25 are fixed with seals/gaskets to make air tight and dust proof joints. The diaphragm 9 and bellow 35 are fixed in housing 8 and diaphragm 21 with face of housing 8 to make air tight joints.
As shown in fig. 2 the device is similar to the device shown in fig. 1, and which is suitable for air braked and vacuum braked vehicles. Hie only difference is that diaphragm 9 and disc 13 are oriented in a horizontal plane with suitable changes in orientation of sealed pressure chamber housing 8 and die train pipe/brake pipe connector 11.
Reference is now made to Fig. 3, wherein another option of device is shown and which is suitable for air braked vehicles only sensitive to vertical accelerations and
is provided with unlimited recharging facility means. The device has a housing 1 with
vertical guide 1A of housing 1 with a spring placed between bottom of mass 2 and horizontal side of housing 1. The mass 2 is provided with two guide rings 4. A sealed pressure chamber housing 8' is fixed over the top of housing 1. The sealed pressure chamber housing 8' has a passage 7, one end of which is provided with a valve seat 6
and the other end is connected to sealed pressure chamber 8 A rubber disc 6 mounted on top of vertical mass 2 presses against the valve seat 6 and keeps passage 7 closed in airtight manner. The sealed pressure chamber housing 8 is provided with a diaphragm 9 bonded to disc 13 placed movably in the sealed pressure chamber 8A, and diaphragm 9 being secured with a ring 10. The brake pipe / train pipe connector 11 is fixed on any
side of housing 8 so that one end of it is closed by the diaphragm 9 and a spring 12 is provided in the sealed pressure chamber 8A and presses the disc 9 against the brake pipe connector 11. A multiplicity of holes 14 is provided in brake pipe/ train pipe
connector 11 and 14A in sealed pressure housing 8. The sealed pressure chamber
]N ' housing 8 is provided with an air cfrmifrfl" flP TrMr1? is closed by an air tight cover
plate55 andjt is connected to brake pipe passage 11A through passage 58 in sealed pressure chamber housing 8* and passage 57 in brake pipe connector 11'. The cover plate is provided with a passage 56, which is connected through passage 15 to sealed pressure chamber 8A. A rubber valve disc 19 mounted on spindle 17 presses against valve seat 18 fixed in cover plate under the force of a spring 20. A diaphragm/bellow 21 is fixed between housing 25 and cover plate. A recharge pin 23 is provided movably in the housing 21 and covered with a flexible protection cover 24 secured to housing 21 with ring 26. A spring 22 is provided to keep recharge pin 23 pressed against housing 25. A pressure release valve consisting of housing 31, valve seat 32, spring 34 and valve disc 33 is mounted on an opening on any side of housing 1. Arrangement for isolating the brake pipe connector 11' from atmosphere manually is provided on a side of sealed pressure chamber housing 8. A bellow/diaphragm 35 is fixed to a recess in sealed pressure chamber housing 8 with a securing ring 39. A screw 36 is provided with a lock nut 37 and a handle/wheel 39 in a threaded hole on side of the housing 8 coaxial with diaphragm 9. The housing 1, sealed pressure chamber housing 8, Air chamber 8B,
recharge pin housing 25 are fixed with seals/gaskets to make air tight and dust proof joints. The diaphragm 9 and bellow 35 are fixed in housing 8 and diaphragm 21 with cover plate 55 to make airtight joints.
Reference is now made to fig. 4, wherein the device for sensing abnormal accelerations additionally in lateral direction far air and vacuum braked vehicles is shown. The device has a housing 1 with built in guides 1A and IB in vertical and lateral directions. The vertical mass 2 is held movably in the vertical guide 1A of housing 1 with a spring placed between bottom of mass 2 and horizontal side of housing 1. The mass 2 is provided wim two guide rings 4. Each of the two lateral masses 45 are movably held in horizontal guides IB of housing Iwith springs 48 or a combination of permanent magnets 47 and springs 48. End covers 46 to cover the outer end of the lateral guides IB. Each of the lateral masses 45 are provided with two guides rings 49. Two bell cranks 51 are pivotally provided on die brackets 50 extending from sealed pressure chamber housing 8 with pins 52. Springs 53 hold the bell crank 51 respectively against the top of vertical mass 2. A sealed pressure chamber housing 8 is fixed over the top of housing 1. Other features of the device are the same as described above with respect to fig, 1.
Reference is now made to fig. 5 the automatic locking and unlocking means for use with air braked vehicles has a connecting pipe 92 fixed on the opening 91 Of brake pipe connector 11. The connecting pipe 92 has pressure chamber 93 at its lower end The pressure chamber is fixed to projection on side of housing 1 with a diaphragm 95 in between. The diaphragm is bonded to disc 94. And a pusher plate 96. A taper pin is provided movabry in the bushes 97 and 100 fixed in holes in housing 1. A spring 102 is provided at the end of taper pin 98 and secured by cover nut 101. A lock pin 105 is provided movably in a bush 104 fixed in a hole at the bottom of housing 1. A spring 103 is provided between head of lock pin 105 and lower nice of housing 1 such that to press the locking towards the taper pin 98.
As shown in fig. 6 the locking or isolating means for use with the device for closing the train pip/brake pipe connector from atmosphere manually can be provided on any side of sealed pressure chamber housing 8 concentric with diaphragm 9. A bellow/diaphragm 40 is fixed to a recess in sealed pressure chamber 8 with a securing ring 39. A screw 36 is provided with a look nut 37 and a handle/wheel 38 in a threaded hole on side of die housing 8A A disc 42 is bonded to end face of the bellow 40. A pin 35 is fixed on the face of disc 13. The bellow 40 is fixed to housing 8 to form a leak proofjoint
Hie devices shown in fig. land 2 and 4 are pre- charged with compressed air /gas through a non-return air filling valve 27. Hie device is fixed at the ends of bogie vehicle or in the center of a four-wheeled vehicle and connected to brake pipe or vacuum pipe of the vehicle through a flexible pipe to die brake pipe/train pipe connector 11. After mounting of the device, the pin 23 is pressed fix* a few seconds to allow air from air reservoir 16 to charge into sealed pressure chamber 8A and thus close the opening of Brake pipe connector 11.
Hie passage 7 being kept sealed by rubber disc 5. Whenever the vertical mass 2 moves down due to acceleration higher than threshold value in vertical direction it results in passage 7 opening to environment inside housing 1 and low pressure being maintained by the pressure release valve 26. The reduction in pressure in sealed pressure chamber 8A results hi movement of disc 13 and diaphragm 9 inward under the force of spring 12, and allows air from brake pipe connector passage 11A to escape through openings 14 and 14 A in brake pipe/train pipe connector 11 and sealed pressure chamber housing 8. This results in drop in pressure in brake pipe of the vehicle and causes brakes to be applied on the vehicle. The drop in brake pipe pressure ia passed on to adjoining vehicles and finally to the locomotive where the driver can observe and apply emergency brakes. Similarly in case of Vacuum braked trains air enters the train pipe
through openings 14 and 14 A to train pipe connector passage 11 A. After an actuation the device can be recharged for a limited number of times depending upon capacity of air reservoir by simply pressing pin 23 through flexible cover 24 for a few seconds. In case of the device becoming dysfunctional, i.e. not keeping the train pipe/brake pipe closed, manual means of isolating are used by opening the lock nut 37, turning the handle 38 so as to tighten the screw until it presses me projection of disc 13 which in turn presses diaphragm 9 against end of brake pipe train pipe connector 11 and thus closes it In the option shown in fig. 6 the isolation is achieved by removing retaining pin 85 from the lever 83 and allowing it to close the diaphragm 9 due to force of spring 82.When this condition is obtained the device needs to be recharged with compressed air/gas by opening the protection coverSO, sealing nut 28 and removing washer 29. The air/gas is filled by means of a suitable adopter similar to that used for filling air in automobile tyres. The non-return air-filling valve is checked for leakage if any and then sealed back with rubber washer 29, nut 28. The protection cover 30 is replaced.
The device shown in fig, 3 is charged with compressed air from the brake pipe of the vehicle when pressure is built up in it After the Brake pipe pressure builds up to a designed value the recharge pin 23 is pressed for a short time which opens the valve 19 and allows air from brake pipe to enter the sealed pressure chamber 8A thus providing force to close the end of brake pipe connector 11 with diaphragm 9. Once the pressure has been built up first time, there is no need to recharge the device until it is actuated due to the vehicle experiencing abnormal accelerations higher man the threshold value. On this occurrence the pressure from the sealed pressure chamber 8A drops suddenly due to movement of vertical mass 2 down ward and diaphragm 9 moves inward due to force exerted by the air in Brake pipe and thus air starts exhausting into atmosphere through holes 14 and 14A After such an incident or any other reason, the device needs to be recharged as explained earlier for (he first charging.
In case of device provided with automatic locking means described in fig. 5. The vertical mass 2 is kept in locked condition when there is no pressure in brake pipe of the vehicle under the force of spring 102 pushing the taper pin 98 towards me diaphragm 95, and thus lock pin 104 is pushed upwards till it touches bottom face of vertical mass 2. As soon as pressure is built up in brake pipe of the vehicle me diaphragm 95 pushes die
taper pin 98 pressing the spring 102 and allows lock pin 104 to move down wards under force of spring 103.
Tne option of providing manual means built in the device for closing the brake pipe connector/train pipe connector shown in fig.6 are used by loosening the lock nut 37, turning the handle 38 so as to tighten the screw until it presses the projection pin 35 on disc 13 which in turn presses diaphragm 9 against end of brake pipe train pipe connector 11 and thus closes it Hie vehicle men becomes normal for operatioa





WE CLAIM:
1. Abnormal riding detector for vacuum/air braked railway vehicles with limited recharging comprising at least a single spring loaded mass (2) disposed into a guide of the housing (1) of the device characterized in that a sealed pressure chamber housing (8, 8") being connected to the housing of the device at the top end thereof such that the extended central portion of the sealed pressure chamber housing being disposed in the upper portion of the guide, a spring loaded mass (2) having a rubber disc (5) at the upper end thereof being disposed in the lower portion of said housing such that to open the passage (8A) being provided in said sealed pressure chamber housing so as to connect the passage with the atmosphere upon experiencing the acceleration beyond the threshold value by the device, a break pipe/train pipe connector (11, 11') being secured with the upper portion of said sealed pressure chamber housing such that to be closed by a diaphragm (9) provided in the sealed pressure chamber of the sealed pressure chamber housing, air pressure recharging means being connected to the extended portion of the sealed pressure chamber housing such that to recharge the sealed pressure chamber and a pressure release valve (31-34) being provided near the upper end of said guide housing.
2. A deivce as claimed in claim 1, wherein said pressure recharging means comprising an air reservoir housing (16) adapted to be secured with extended portion of said sealed pressure chamber housing, a spring loaded spindle (17) being disposed within air reservoir housing such that to be pressed by means of a spring loaded recharging pin (23)
disposed in a recharging pin housing (25) secured at the upper surface of said extended portion, a protection cover (24) being secured with said recharging pin housing to protect said pin.
3. A device as claimed in claim 2, wherein a diaphragm (21) being provided on the upper surface of said extended portion such that to seal the passage provided in the said extended portion to accommodate said sprindle therein.
4. A device as claimed in any one of the claim 2 and 3 wherein a non return air filling valve (27) being provided with said air reservoir housing to fill in the compressed air into said air reservoir housing.
5. A device as claimed in claim 1, wherein train/brake pipe connector (11, 11') is connected to the sealed pressure chamber housing in a vertical position such that to be closed by a diaphragm (9) provided in the horizontal pressure chamber of the sealed pressure chamber housing.
6. A device as claimed in claim 1, wherein the air reservoir (16) being connected by a passage (15) so as to recreate the pressure in the sealed pressure chamber (8A).
7. A device as claimed in any of the claims 1 to 6 wherein a plurality of spring loaded masses (45) are provided in the horizontal as well as vertical end plates (46) provided in the housing of the device.
8. A device as claimed in claim 7, wherein magnets (47) are provided with the covers of the horizontal guides to hold the horizontal masses within the respective guides.
9. A device as claimed in claim 7, wherein a spring loaded bell crank (51) is provided on the bracket extending from the sealed pressure chamber such that to displace the vertical mass to open the passage provided in the sealed pressure chamber housing when the device experiences horizontal acceleration above threshold value.
10. A device as claimed in claim 1, wherein said automatic locking means are provided below the vertical mass to lock the same, locking means comprises a tapered pin (98) disposed in the lower end of the guide housing such that to be displaced by means of a diaphragm (95) adapted to be actuated by the air pressure from brake pipe after installing the device on the vehicle, a connecting pipe (92) being provided to connect the pressure chamber having the diaphragm/ disc disposed therein, a spring (103) loaded pin (104) adapted to be displaced up and down being provided to lock said mass in the condition when there is no pressure in the brake pipe.
11. A device as claimed in claim 10, wherein bushes (97 and 100) are provided to accommodate said tapered pin therein movably in the said guide housing.
12. A device as claimed in claim 1, wherein locking/isolating means consisting of a diaphragm(40) bounded with a disc (41 having a central. pin (35) adapted to be actuated by a screw (36) are provided in the sealed pressure chamber of the sealed pressure.
13. Abnormal riding detector for vacuum/air braked railway vehicles with limited recharging substantially as herein described and illustrated.

Documents:

1255-del-1999-abstract.pdf

1255-DEL-1999-Claims.pdf

1255-del-1999-complete specification (granted).pdf

1255-del-1999-correspondence-others.pdf

1255-del-1999-correspondence-po.pdf

1255-DEL-1999-Description (Complete).pdf

1255-DEL-1999-Drawings.pdf

1255-del-1999-form-1.pdf

1255-del-1999-form-19.pdf

1255-DEL-1999-Form-2.pdf

1255-del-1999-form-26.pdf

1255-del-1999-form-3.pdf


Patent Number 244170
Indian Patent Application Number 1255/DEL/1999
PG Journal Number 48/2010
Publication Date 26-Nov-2010
Grant Date 22-Nov-2010
Date of Filing 17-Sep-1999
Name of Patentee C.M.DUTTA
Applicant Address 30, RAILWAY COLONY, S.P. MARG, NEW DELHI-110 021, INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 C.M.DUTTA 30, RAILWAY COLONY, S.P. MARG, NEW DELHI-110 021, INDIA.
PCT International Classification Number B61L 23/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA