US3507368A - Braking device for gate - Google Patents

Braking device for gate Download PDF

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Publication number
US3507368A
US3507368A US707261A US70726168A US3507368A US 3507368 A US3507368 A US 3507368A US 707261 A US707261 A US 707261A US 70726168 A US70726168 A US 70726168A US 3507368 A US3507368 A US 3507368A
Authority
US
United States
Prior art keywords
disc
gate
braking device
support
coil
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
US707261A
Other languages
English (en)
Inventor
Henri Durant
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.)
Umicore NV SA
Original Assignee
Acec
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 Acec filed Critical Acec
Application granted granted Critical
Publication of US3507368A publication Critical patent/US3507368A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L29/00—Safety means for rail/road crossing traffic
    • B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
    • B61L29/243—Transmission mechanism or acoustical signals for gates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets

Definitions

  • a braking device for gates particularly a railroad crossing gate comprising a disc, having a flat face, mounted on the articulation shaft of the gate.
  • An electromagnet is mounted in close relationship with the flat face on a support mounted for articulation about an axis parallel to the fiat face.
  • the electromagnet includes at the ends of the magnetic core a pair of pole pieces in the form of plates the edges of which adjacent the disc flat face are provided with brake linings.
  • the articulation axis lies between the disc fiat face and a vertical through the center of gravity of the support and arranged to cause articulation of the support and electromagnet away from the disc when the coil is deenergized.
  • the present invention relates to an electromagnetic braking device adapted to hold a gate, for instance a railroad crossing gate, in predetermined positions by energization of a coil through which a DC. current flows.
  • the braking device according to the invention is particularly appropriate to gates for full-width railroad crossings with automatic control independent of signal blocks that regulate traffice on the road; any accidental break in the energization circuit of the braking device resulting in the fall of the gate.
  • the braking device may oppose an appreciable torque while consuming very little power. There is hardly any lateral forces reacting on the shaft of the driving motor for lifting the gate. Finally, the braking device is not bulky.
  • the braking device is characterized in that it comprises a flat circular disc mounted on the horizontal shaft of the motor device for lifting the gate, a support articulated about an axis parallel to the fiat face of the said disc, carrying a coil provided with a magnetic core parallel to the said axis and having two pole pieces in the form of parallel plates against the cheeks of the coil, the edges of the plates being disposed at a short distance from the disc, provided outwardly with a thickness of Ferodo adapted to be applied against the disc when the pole pieces are drawn toward it, the articulation axis of the support being located between the vertical through the center of gravity of the support and the disc.
  • the single figure is a perspective view illustrating a motor device 1 adapted to actuate a non-illustrated gate and provided with a horizontal shaft 2.
  • a circular disc 3 is mounted on shaft 2 and has a flat outer face located a short distance from the pole pieces 4 of an electromagnet having a coil 6 surrounding a core 5.
  • This electromagnet is mounted on a support 7 that articulates about axle 8 solid with a bracket 9 secured to the frame of the motor device 1 by means of a U-shaped sheet metal member .10 and screws (not shown on the drawing) for adjusting its position.
  • a Ferodo brake lining 12 is provided Ill 3,507,368 Patented Apr.
  • Brake lining 12 projects beyond the edge of the pole piece 4 so that when the latter is drawn toward disc 3, it is Ferodo lining that comes in contact with it.
  • Safety lugs (not shown) made of non-magnetic metal prevent direct contact of the pole pieces with the disc when the Ferodo linings are worn out to a certain extent to thus avoid sticking.
  • the articulation axis 8 is located between the disc 3 and the vertical thruogh the center of gravity of the support 7 in such a way that the weight of the latter draws it away from the disc when the coil 6 is not energized.
  • a non-illustrated spring adds its action to that of gravity to draw the support away from the disc so as to give more stability to this position.
  • This spring also serves to limit the pivoting movement of the support 7. It is secured to the latter by means of a screw 11 and, on the other hand, fastened onto frame 10 by any other convenient means.
  • An electromagnetic braking device for a gate particularly a railroad crossing gate actuated by a motor having a horizontal shaft, comprising: i
  • an electromagnet including a coil, a magnetic core extending through said coil and parallel to said braking disc and pole pieces in the form of j plates flat against each end of said core, said pole pieces each having one edge adjacent said disc;
  • a support for said electromagnet said support having an articulation axis parallel to said disc and lying below the center of gravity of said support, said articulation axis being located between said disc and a vertical through said center of gravity whereby, upon deenergization of said coil, the weight of said support causes said pole pieces to move away from said disc under the forces of gravity.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Braking Arrangements (AREA)
US707261A 1967-02-23 1968-02-21 Braking device for gate Expired - Lifetime US3507368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE694495A BE694495A (fr) 1967-02-23 1967-02-23 Frein de barrière

Publications (1)

Publication Number Publication Date
US3507368A true US3507368A (en) 1970-04-21

Family

ID=3850273

Family Applications (1)

Application Number Title Priority Date Filing Date
US707261A Expired - Lifetime US3507368A (en) 1967-02-23 1968-02-21 Braking device for gate

Country Status (7)

Country Link
US (1) US3507368A (xx)
BE (1) BE694495A (xx)
CA (1) CA846017A (xx)
DE (1) DE1605861B2 (xx)
ES (1) ES350848A1 (xx)
FR (1) FR1554498A (xx)
NL (1) NL6802527A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955485A (en) * 1973-10-05 1976-05-11 Roland Stasse Coffee making machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US750207A (en) * 1904-01-19 Electromagnetic brake
US1812190A (en) * 1925-02-09 1931-06-30 Baseler Wolfgang Railway track brake
US2131888A (en) * 1933-11-06 1938-10-04 Floyd M Harris Automobile lighting system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US750207A (en) * 1904-01-19 Electromagnetic brake
US1812190A (en) * 1925-02-09 1931-06-30 Baseler Wolfgang Railway track brake
US2131888A (en) * 1933-11-06 1938-10-04 Floyd M Harris Automobile lighting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955485A (en) * 1973-10-05 1976-05-11 Roland Stasse Coffee making machine

Also Published As

Publication number Publication date
BE694495A (fr) 1967-08-23
DE1605861A1 (de) 1971-03-25
ES350848A1 (es) 1970-06-16
FR1554498A (fr) 1969-01-17
NL6802527A (nl) 1968-08-26
DE1605861B2 (de) 1971-08-19
CA846017A (en) 1970-07-07

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