US3901390A - Magnetic rail car knuckle-opener - Google Patents

Magnetic rail car knuckle-opener Download PDF

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Publication number
US3901390A
US3901390A US497847A US49784774A US3901390A US 3901390 A US3901390 A US 3901390A US 497847 A US497847 A US 497847A US 49784774 A US49784774 A US 49784774A US 3901390 A US3901390 A US 3901390A
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US
United States
Prior art keywords
arm
magnet
set forth
track
knuckle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US497847A
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English (en)
Inventor
Armand Giovanelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southern Pacific Transportation Co
Original Assignee
Southern Pacific Transportation Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southern Pacific Transportation Co filed Critical Southern Pacific Transportation Co
Priority to US497847A priority Critical patent/US3901390A/en
Priority to CA227,676A priority patent/CA1028288A/en
Priority to GB2279675A priority patent/GB1477590A/en
Priority to DE19752524660 priority patent/DE2524660A1/de
Priority to FR7517909A priority patent/FR2281863A1/fr
Priority to JP50090008A priority patent/JPS6042058B2/ja
Application granted granted Critical
Publication of US3901390A publication Critical patent/US3901390A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G7/00—Details or accessories
    • B61G7/04—Coupling or uncoupling by means of trackside apparatus

Definitions

  • ABSTRACT Apparatus for ensuring that coupler knuckles of uncoupled rail cars are fully open before recoupling comprising a magnet positionable in the path of the coupler knuckle of a moving rail car, the magnet being mounted so that after the knuckle engages the magnet, movement of the rail car causes the magnet to twist and move outwardly to pull the knuckle to full open position.
  • the present invention relates to rail car uncoupling and coupling operations, particularly such as are carried out in railroad classification yards.
  • a train of coupled cars is rolled along a track and over a hump.
  • a workman alongside of the train operates the uncoupling lever on the forward end of each car to unlatch the pivotally mounted knuckle on the car coupler.
  • Ac celeration of the forward car down over the hump causes it to pull away from the following car and open the unlatched coupler knuckle.
  • the uncoupled cars then roll down the track and are switched to desired tracks so that new trains of cars can be made up.
  • a coupler knuckle will not be moved to full open position as the cars separate from each other. If not open enough the knuckle may pivot' back to its closed position and be relatched before it comes into contact with the car to which it is to be coupled. Or, the knuckle may pivot back sufficiently towards closed po sition so that it will contact the coupler on the next car and be moved to closed position without coupling engagement with the next car. In either case, the desired recoupling will not occur, and it will then be necessary to reopen the coupler and use a switch engine to move the cars together so that they will couple with each other.
  • the main object of the present invention is to provide an apparatus disposed in the path of uncoupled rail cars as they roll down the track beyond the hump which will engage the coupler knuckles and leave them in full.
  • the invention uses a magnet which is mounted in the path of an oncoming coupler knuckle.
  • the magnet attaches itself to the knuckle and the for ward movement of the rail car causes the magnet to twist and move outwardly from the rail center to pull the knuckle to full open position.
  • the magnet then slides off the full open knuckle and falls out of. the way beneath the car as the car passes therepast.
  • the magnet is then moved back into the path of the coupler knuckle on the next car so that the operation can be repeated.
  • FIG. I is an illustrative view of a conventional rail car coupling, showing both members coupled together;
  • FIG. 2 is a view similar to FIG. 1, showing the coupling members as they uncouple;
  • FIG. 3 is a view similar to FIG. 1, showing the mem bers after they have uncoupled;
  • FIG. 4 is a perspective view of an automatic knuckle opener constructed in accordance with the invention.
  • FIG. 5 is a plan view of the knuckle opener as it en- DESCRIPTION OF THE PREFERRED EMBODIMENT
  • FIG. 1 shows in simplified form two conventional rail car couplers, l and 2.
  • Coupler 1 has a knuckle 3 pivotally mounted thereon by a vertical pivot pin 4, while coupler 2 has a similar knuckle 5 pivotally mounted thereon by pivot pin 6.
  • the knuckles 3 and 5 interengage in their closed position to prevent uncoupling.
  • the knuckles are locked in closed position by latch pins (not shown).
  • knuckle 3 is unlatched and the couplers are pulled apart.
  • Latched knuckle 5 pivotsknuckle 3 towards open position, as shown in FIG. 2.
  • FIG. 3 shows the couplers fully uncoupled and with knuckle 3 in full open position. If the knuckle 3 is in any position between the full-line position and the dotted-line position 3a the knuckles 3 and 5 will clear one another when the couplers are pushed together for recoupling.
  • knuckle 3 will engage the outer surface of knuckle 5 on recoupling and will be cammed back to its closed position 30 without recoupling.
  • the mechanism hereafter described is utilized to ensure that the uncoupled knuckle 3 is moved to its full open position even though it may be only partially opened during uncoupling.
  • the knuckle opener mechanism generally referred to by reference numeral 10, comprises a flat base plate 11 secured at its ends to the cross ties 12 underlying the track rails 13 and 13a.
  • a housing 14 depends from base plate 11 and has fixed thereto bearing 15 in which is journaled shaft 16.
  • Gear 17 is fixed to shaft 16 below the base plate 11, while disk 18 is fixed to the shaft above the base plate.
  • Bracket 19 is fixed to disk 18 centrally thereof and has upstanding sides 20 towhich arm 21 is mounted by horizontal pivot pin 22.
  • Supported on the upper end of arm 21 is a magnet 23 having pole faces 24 adapted to (em gage the forward surface of the knuckle 2 of the coupler l on a rail car 27.
  • the knuckle opener mechanism further includes a raised guide bar 28 fixed to the base plate and positioned thereon so that when arm 21 is in its raised position, it will lean on the guide bar and be supported thereby so that the arm will incline upwardly from near -rail 13 towards the middle of the track so that the magnet is positioned in the path of an oncoming coupler knuckle.
  • the guide bar 28 slants toward rail 13 so that sliding movement of arm 21 along the guide bar will cause the upper end of the arm and the magnet 23 thereon to pivot outwardly from the center of the track.
  • a stop member 29 on the forward end of guide bar 28 stops forward movement of arm 21 therealong and includes a limit switch 30 operable by arm 21 when it engages the stop memher.
  • a cradle 31 is disposed at the rear end of guide bar 28 and is pivotally mounted thereon by sleeve 32.
  • a solenoid 33 is mounted within housing 14 and has a plunger 34 engageable with cradle 31. Cradle 3] is cushioned against downward movement by spring 35.
  • housing 14 Also mounted in housing 14 is an electric motor 36 having gear 37 fixed to its drive shaft and in mesh with gear 17.
  • FIG. 3 further shows a light source 38 and a photoelectric cell sensor 39 disposed on opposite sides of the track and at car sill height for actuation of the knuckle opener mechanism.
  • magnet 23 is an electromagnet with an energizing coil 23a, is best explained with reference to the control circuit shown in FIG. 8.
  • the arm 21 is in the horizontal position, resting in cradle 31, as shown in FIG. 6.
  • the light source 38 is sensed by photoelectric cell 39 and, by conventional circuitry, relay 40 maintains switch 40a in open position.
  • relay 40 actuates switch 40a to closed position, completing the circuit from battery 41 through now closed switch 40a, normally closed limit switch 30 and normally closed contacts 42a of relay 42 to energize solenoid 33 and motor 36.
  • Energization of solenoid 33 pivots cradle 31 upwardly to give an initial inclination to arm 21.
  • Motor 36 drives disk 18 and bracket 19 thereon in a counterclockwise direction (as seen from above) which causes arm 21 to ride along guide bar 28, becoming more and more vertical as it moves therealong. Eventually the arm is carried forwardly enough so that it engages stop member 29 and limit switch 30 thereon. With switch 30 now moved from its normal full-line position of FIG. 8, motor 36 and solenoid 33 will now be de-energized. Movement of switch 30 to its dotted-line position causes relay 42 to be energized, opening contacts 42a and closing contacts 42b, and also energizes the electromagnet coil 23a.
  • the magnet 23 is energized and positioned in the path of the oncoming coupler knuckle 2.
  • the magnet 23 will engage and attach itself magnetically to the knuckle.
  • Forward movement of the car carries the magnet therewith, causing arm 21 to slide along guide bar 28.
  • disk 18 will rotate in a clockwise direction so that the arm 21 will be rotated to twist the magnet in a clockwise direction.
  • the inclination of the guide bar forces the arm 21 and magnet thereon away from the track center. The combined twisting and outward movement of the magnet thus pulls the knuckle outwardly to full open position while maintaining a full contact therewith.
  • limit switch 30 will be returned to its normal full-line position of FIG. 7 as soon as the arm begins moving, the now closed contacts 42b maintain the circuits to relay 42 and magnet coil 23a. Contacts 42a remain open to prevent re-energization of motor 36 and solenoid 33 so that arm 21 cannot be moved upwardly while the rail car is passing over mechanism 10.
  • Relay 40 causes switch 40a to open, deenergizing relay 42 and magnet coil 23 to restore the system to its initial condition awaiting the approach of the next rail car.
  • a wheel-actuated switch such as shown in FIG. 8, may be used.
  • a trip arm 50 springbiased to an upper position, is positioned to be depressed by the rim of a car wheel 51 on track 13 to actuate switch 52. Since there are four wheels on the side of a car, switch 52 is of a sequencing type and wired so that every fourth depression will complete a circuit through the switch. Thus the forward wheel can close the switch during depression of the trip arm 50 while the remaining three wheels will cycle the switch back into position to close in response to the forward wheel on the next rail car.
  • FIG. 7 illustrates a control circuit which may be used with such a sequencing switch.
  • switch 52 closes to energize the motor 36, solenoid 33 and relay 53.
  • Relay contacts 53a close to continue the energization of the motor and solenoid even though switch 53 opens as the wheel moves therepast.
  • actuation of limit switch 30 opens contacts 300 to de-energize the motor, solenoid and relay 53.
  • Limit switch contacts 30b energize relay 54 whose contacts 54a close the circuit to the magnet coil 23a.
  • Relay 54 will be deenergized, but it will have contacts 54a which have a time delayed dropout so that the magnet coil 23a will remain energized for at least the length of time that the magnet is in contact with the coupler knuckle.
  • Trip arm 50 will be actuated by the remaining wheels on the rail car to index the sequencing switch 52 back into position to be closed by the next rail car without reenergizing solenoid 33 or motor 36.
  • solenoid 33 or motor 36 thus, once the arm 21 has fallen down into cradle 31 it will not be raised until after the rail car has passed thereby.
  • Both control circuits of FIGS. 7 and 8 will cause the arm 21 to be repositioned to an upright position in responseto the approach of an oncoming rail car, will maintain the magnet energized during the time that it is in contact with the coupler knuckle and will prevent the arm 21 from being raised until after the rail car has passed by the mechanism 10.
  • the circuits of FIGS. 7 and 8 are merely exemplary and other circuits may be used to give the same results.
  • the magnet 23 has been described as being an electromagnet, a permanent magnet may be used in place thereof. In such case the control circuits may be modified to eliminate the portions thereof used to energize and deenergize the magnet coil 23a.
  • a hydraulic cylinder could be substituted therefor.
  • the control circuits of FIGS. 7 and 8 would be modified to actuate an electrically operated hydraulic control device at the same time and in place of solenoid 33.
  • the knuckle opener mechanism 10 is to be located sufficiently far enough down the track from the hump so that the uncoupled cars are adequately spaced apart to allow the magnet arm 21 to be repositioned to its upright position in the interval between successive cars.
  • the speed of repositioning will depend upon the rate at which the rail cars are uncoupled, it being necessary to select a motor 36 and the gear transmission to disk 18 so that the arm 21 can be fully repositioned in the time interval between successive cars.
  • Apparatus for ensuring the full opening of conventional coupler knuckles on the front end of uncoupled rail cars rolling down a track comprising:
  • said means (b) comprises a holder supported on said base plate for rotation about a vertical axis, and a horizontal pivot pin carried by said holder and passing through said arm.
  • said means (0) comprises a substantially horizontal guide bar mounted on said base, said guide bar being disposed above said pivot pin and between said pivot pin and the center of said track, said guide bar extending along said track and slanting away from the center of said track.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Platform Screen Doors And Railroad Systems (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Railway Tracks (AREA)
  • Toys (AREA)
US497847A 1974-08-16 1974-08-16 Magnetic rail car knuckle-opener Expired - Lifetime US3901390A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US497847A US3901390A (en) 1974-08-16 1974-08-16 Magnetic rail car knuckle-opener
CA227,676A CA1028288A (en) 1974-08-16 1975-05-23 Magnetic rail car knuckle-opener
GB2279675A GB1477590A (en) 1974-08-16 1975-05-23 Operation of rail car couplings
DE19752524660 DE2524660A1 (de) 1974-08-16 1975-05-31 Eisenbahnkupplung mit magnetischer oeffnungsvorrichtung
FR7517909A FR2281863A1 (fr) 1974-08-16 1975-06-09 Dispositif magnetique d'ouverture des griffes d'attelage
JP50090008A JPS6042058B2 (ja) 1974-08-16 1975-07-21 マグネツト式レ−ルカ−ナツクル開口装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US497847A US3901390A (en) 1974-08-16 1974-08-16 Magnetic rail car knuckle-opener

Publications (1)

Publication Number Publication Date
US3901390A true US3901390A (en) 1975-08-26

Family

ID=23978546

Family Applications (1)

Application Number Title Priority Date Filing Date
US497847A Expired - Lifetime US3901390A (en) 1974-08-16 1974-08-16 Magnetic rail car knuckle-opener

Country Status (6)

Country Link
US (1) US3901390A (de)
JP (1) JPS6042058B2 (de)
CA (1) CA1028288A (de)
DE (1) DE2524660A1 (de)
FR (1) FR2281863A1 (de)
GB (1) GB1477590A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080110845A1 (en) * 2006-11-13 2008-05-15 Kadee Quality Products, Inc. Magnetic core actuator
US8302535B2 (en) 2010-08-09 2012-11-06 Chase Thomas B Train yard classification system
ITTO20110939A1 (it) * 2011-10-18 2013-04-19 Selex Elsag Spa Dispositivo robotizzato per la movimentazione degli agganci di un vagone ferroviario porta container

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0516857Y2 (de) * 1985-12-25 1993-05-06
DE4015878A1 (de) * 1990-05-17 1991-11-21 Aachener Forsch Regelungstech Einrichtung zum vollautomatischen trennen von gueterwagen mit automatischen kupplugen
DE102018009589B3 (de) 2018-12-06 2019-12-12 Michael Nold Kupplungsunterstützungsvorrichtung zum An-und Abkuppeln von Schienenfahrzeugen während der Fahrt
RU2728968C1 (ru) * 2019-10-16 2020-08-03 Открытое Акционерное Общество "Российские Железные Дороги" Способ автоматического расцепления автосцепок движущихся вагонов и устройство его осуществления

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1649129A (en) * 1922-06-10 1927-11-15 Westinghouse Electric & Mfg Co Solenoid coupler for cars
US2738080A (en) * 1950-10-09 1956-03-13 Gilbert Co A C Toy car coupling with forked detent
US2933201A (en) * 1958-11-07 1960-04-19 Arvid L Anderson Electro-magnetic means for effecting de-coupling of a pair of adjacent coupled toy train cars
US3140784A (en) * 1960-11-03 1964-07-14 Gilbert Co A C Spreadable coupler for ho gage model railroad vehicles
US3160286A (en) * 1963-04-17 1964-12-08 Wilson Fraser Railway car coupler
US3682325A (en) * 1970-07-02 1972-08-08 Kennecott Copper Corp Apparatus for uncoupling railroad cars

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1649129A (en) * 1922-06-10 1927-11-15 Westinghouse Electric & Mfg Co Solenoid coupler for cars
US2738080A (en) * 1950-10-09 1956-03-13 Gilbert Co A C Toy car coupling with forked detent
US2933201A (en) * 1958-11-07 1960-04-19 Arvid L Anderson Electro-magnetic means for effecting de-coupling of a pair of adjacent coupled toy train cars
US3140784A (en) * 1960-11-03 1964-07-14 Gilbert Co A C Spreadable coupler for ho gage model railroad vehicles
US3160286A (en) * 1963-04-17 1964-12-08 Wilson Fraser Railway car coupler
US3682325A (en) * 1970-07-02 1972-08-08 Kennecott Copper Corp Apparatus for uncoupling railroad cars

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080110845A1 (en) * 2006-11-13 2008-05-15 Kadee Quality Products, Inc. Magnetic core actuator
US8302535B2 (en) 2010-08-09 2012-11-06 Chase Thomas B Train yard classification system
ITTO20110939A1 (it) * 2011-10-18 2013-04-19 Selex Elsag Spa Dispositivo robotizzato per la movimentazione degli agganci di un vagone ferroviario porta container

Also Published As

Publication number Publication date
GB1477590A (en) 1977-06-22
JPS5137410A (en) 1976-03-29
JPS6042058B2 (ja) 1985-09-20
CA1028288A (en) 1978-03-21
FR2281863A1 (fr) 1976-03-12
DE2524660A1 (de) 1976-03-04

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