Classifications

• • 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
  • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
  • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
  • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
  • E05F15/00—Power-operated mechanisms for wings
  • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
  • E05F15/42—Detection using safety edges
  • E05F15/44—Detection using safety edges responsive to changes in electrical conductivity
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H29/00—Switches having at least one liquid contact
  • H01H29/004—Operated by deformation of container
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
  • E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
  • E05Y2400/65—Power or signal transmission
  • E05Y2400/66—Wireless transmission
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
  • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
  • E05Y2900/00—Application of doors, windows, wings or fittings thereof
  • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
  • E05Y2900/13—Type of wing
  • E05Y2900/132—Doors

Definitions

• the present invention relates to a safety arrangement in a device for indicating a pressure or force applied to, for example, push-buttons, door edge sensors, pressure sensitive doormats or position detecting equipment in general, said device being of the type which comprises one or more channels in an elastic electrially insulating material, at least one of said channels containing an electrically conducting fluid through which, in normal operation, an electric current passes and which thereby forms a current path comprised in an electric primary circuit adapted to activate pressure and force responsive means, said current path being interrupted when the said fluid-containing channel is compressed under the action of an external force displacing the fluid.
• SE-B-398,684 discloses a safety strip designed according to this principle and used on, for example, electrically operated doors to prevent squeezing of a person entering through the doorway.
• the current path is comprised in the electric circuit for operating the door.
• the electric circuit When the door hits an obstacle, the electric circuit thus is interrupted and the door is made inoperable.
• a broken conductor wire in the safety strip and power failure give the same result.
• the device is self- regulating and may seem to provide "failsafe" reliability. There is, however, one type of fault to which the device does not respond correctly, i.e.
• the invention proposes a safety arrangement of the type as defined in the claims.
• the safety means comprises a rubber strip A which is filled with an electrically conducting fluid.
• the fluid is supplied with current from an a.c. source 3 via lead-ins 1 and 2.
• a current transformer core 4 em ⁇ braces the strip 1, and the core winding is connected to the door operating circuit 5.
• the transformer thus senses whether or not current passes through the fluid in the rubber strip A. If not, the reason is either that the force F has compressed the strip such that the current path has been interrupted, or that a power failure has occurred, caused by, for example, an external short-circuiting 6. In both cases, the door opening circuit 5 is interrupted.
• the current transformer may be replaced by an optocoupler mounted in the strip and connected to the door operating circuit.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Measuring Fluid Pressure (AREA)
• Power-Operated Mechanisms For Wings (AREA)
• Push-Button Switches (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20359738

Family Applications (1)

Country Status (3)

Families Citing this family (5)

Family Cites Families (2)

• 1985
  • 1985-04-02 SE SE8501625A patent/SE447603B/sv not_active IP Right Cessation
• 1986
  • 1986-04-02 WO PCT/SE1986/000150 patent/WO1986005836A1/en not_active Ceased
  • 1986-04-02 EP EP19860902558 patent/EP0216892A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events