Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/20—Interlocking, locking, or latching mechanisms
  • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
  • H01H9/287—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member wherein the operating part is made inaccessible or more difficult to access by a lid, cover or guard, e.g. lockable covers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/20—Interlocking, locking, or latching mechanisms
  • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
  • H01H9/286—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a removable locking part acting directly on the operating part

Definitions

• This application relates to toggle switches and, more particularly, to apparatus and methods for securing toggle switches in a desired state.
• Toggle switches are used to actuate various electrical systems.
• toggle switches are used to power on and off the various control surface electrical systems on an aircraft.
• the control surface electrical system associated with the ailerons must be powered on by moving the associated toggle switch to the "ON" position.
• a typical toggle switch assembly 10 includes a toggle switch 12, a switch cover 14, a fulcrum 16 and a switch board 18.
• the toggle switch 12 and the fulcrum 16 are mounted on the switch board 18.
• the toggle switch 12 is moveable between an "ON” (e.g., forward) position, as shown in Fig. 1 , and an "OFF" (e.g., rearward) position, as shown in Fig. 2.
• the switch cover 14 is pivotally connected to the fulcrum 16, and is moveable between a closed position (Fig. 1 ) and an open position (Fig. 2).
• the switch cover 14 is configured to automatically move the toggle switch 12 to the forward "ON" position when the switch cover 14 is moved to the closed position, as shown in Fig.
• toggle switch assembly 10 is biased to the powered on configuration.
• a user e.g., a pilot
• the toggle switch 12 To power off the toggle switch assembly 10, a user (e.g., a pilot) must open the switch cover 14 and move the toggle switch 12 to the rearward "OFF" position, as shown in Fig. 2.
• the toggle switch assembly 10 is powered off, thereby cutting off power to the associated control surface electrical system. However, if the switch cover 14 is inadvertently moved to the closed position, then power will automatically be restored to the associated control surface electrical system.
• the disclosed toggle switch lockout clip may include a clip body having a central region and including a latch portion protruding from the central region, the latch portion including an extension member and a hook member connected to the extension member to define a hook gap, and a leg portion protruding from the central region away from the latch portion.
• the disclosed toggle switch lockout clip may include a clip body having a central region and including a latch portion protruding from the central region, the latch portion including an extension member and a hook member connected to the extension member to define a hook gap, a leg portion protruding from the central region away from the latch portion, a first side portion opposed from a second side portion, wherein the first and second side portions extend from the central region and define a gap therebetween, and an engagement portion positioned between the first and second side portions.
• the disclosed toggle switch system may include (1 ) a toggle switch assembly including a toggle switch and a switch cover moveable between at least a closed position and an open position, wherein the switch cover is positioned over the toggle switch in the closed position, and (2) a toggle switch lockout clip including a clip body having a central region, the clip body including a latch portion protruding from the central region, the latch portion define a hook gap, wherein at least a portion of the switch cover is received in the hook gap, and a leg portion protruding from the central region away from the latch portion.
• a method for locking out a toggle switch assembly that includes a toggle switch and a switch cover, wherein the toggle switch is moveable between an ON position and an OFF position, and wherein the switch cover is moveable between a closed position and an open position.
• the method may include the steps of (1 ) moving the switch cover to the open position and the toggle switch to the OFF position and (2) mounting a clip onto the toggle switch assembly, the clip including a latch portion that latches onto the switch cover and a leg portion that extends away from the latch portion, wherein the clip inhibits movement of the switch cover to the closed position and the toggle switch to the ON position.
• Fig. 1 is a side elevational view of a prior art toggle switch assembly
• Fig. 2 is a side elevational view of the toggle switch assembly of Fig. 1 , shown in a powered off configuration
• Fig. 3 is a front and side perspective view of one embodiment of the disclosed toggle switch lockout clip
• Fig. 4 is a side elevational view of the toggle switch lockout clip of Fig. 3
• Fig. 5 is a side elevational view of the toggle switch lockout clip of Fig. 4 mounted on, and locking out, a toggle switch assembly
• Fig. 6 is a front elevational view of the toggle switch lockout clip and toggle switch assembly of Fig. 5, shown with a tag connected to the toggle switch lockout clip; and Fig. 7 is a flow chart outlining one embodiment of the disclosed method for locking out a toggle switch assembly.
• a toggle switch lockout clip that may be mounted on a toggle switch assembly to inhibit (if not eliminate) inadvertent actuation of the toggle switch assembly.
• the disclosed toggle switch lockout clip When mounted on a toggle switch assembly, the disclosed toggle switch lockout clip may secure the toggle switch of the toggle switch assembly in the "OFF" position and may secure the switch cover of the toggle switch assembly in the open position. As such, actuation of the toggle switch assembly will require the intentional and affirmative step of removing the toggle switch lockout clip prior to actuation.
• one embodiment of the disclosed toggle switch lockout clip, generally designated 100 may include a clip body 102 having a latch portion 104, a leg portion 106, an engagement portion 108 and side portions 1 10, 1 12. Additional components and features, such as a through hole 1 14, may be included without departing from the scope of the present disclosure.
• the clip body 102 may be formed from a semi-rigid, springy yet resilient material to facilitate mounting the toggle switch lockout clip 100 on a toggle switch assembly.
• the clip body 102 of the toggle switch lockout clip 100 may be formed from a metal or metal alloy, such as steel.
• the clip body 102 of the toggle switch lockout clip 100 may be formed from a polymeric material, such as polycarbonate.
• the clip body 102 of the toggle switch lockout clip 100 may be formed from a combination of materials.
• the clip body 102 of the toggle switch lockout clip 100 may be formed as a single monolithic body (i.e., the latch portion 104, the leg portion 106, the engagement portion 108 and the side portions 1 10, 1 12 may be integral).
• the clip body 102 of the toggle switch lockout clip 100 may be formed by connecting together (e.g., with welds, adhesives, mechanical fasteners or the like) one or more portions 104, 106, 108, 1 10, 1 12 of the clip body 102.
• the latch portion 104 of the clip body 102 may protrude away from the central region 1 16 of the clip body 102, and may include an extension member 1 18 and a hook member 120.
• the extension member 1 18 may include a proximal end 122 and a distal end 124.
• the proximal end 122 of the extension member 1 18 may be positioned proximate (i.e., at or near) the central region 1 16 of the clip body 102.
• the hook member 120 may be connected proximate the distal end 124 of the extension member 1 18, and may be disposed at an angle A relative to the extension member 1 18.
• the angle A may open toward the central region 1 16 of the clip body 102, and may range from about 10 to about 170 degrees, such as from about 45 to about 135 degrees, or from about 70 to about 1 10 degrees (e.g., about 90 degrees). Therefore, the hook member 120 may define a hook gap 126 between the hook member 120 and the extension member 1 18 proximate the distal end 124 of the extension member 1 18. The hook gap 126 may be shaped to closely receive the tip 205 of a switch cover 204, as shown in Fig. 5.
• a guide tab 128 may extend from the end 130 (Fig. 4) of the hook member 120 of the latch portion 104. The guide tab 128 may be disposed at a non-zero angle B (Fig.
• the angle B of the guide tab 128 may range from about 10 to about 180 degrees, such as from about 20 to about 90 degrees, or from about 30 to about 60 degrees (e.g., about 45 degrees).
• the leg portion 106 of the clip body 102 may protrude away from the central region 1 16 of the clip body 102 in a direction generally away from the latch portion 104.
• the leg portion 106 may include a proximal end 134 and a distal end 136.
• the proximal end 134 of the leg portion 106 may be positioned proximate the central region 1 16 of the clip body 102 and the distal end 136 may be spaced a distance D from the proximal end 134.
• the distance D may define the height of the leg portion 106, and may be dictated by the size and configuration of the toggle switch assembly upon which the toggle switch lockout clip 100 will be mounted, as described in greater detail below.
• the engagement portion 108 of the clip body 102 may protrude inward from the central region 1 16 of the clip body 102 such that the engagement portion 108 is generally between the latch portion 104 and the leg portion 106.
• the engagement portion 108 may include an engagement surface 140 for engaging (or at least
• a notch 142 may be formed in the engagement surface 140, and the notch 142 may be contoured to closely correspond to the contour of a portion of the toggle switch (or the switch cover).
• the first side portion 1 10 may be laterally opposed from, and optionally generally parallel with, the second side portion 1 12. Therefore, the first and second side portions 1 10, 1 12 may define a gap 144, and the engagement portion 108 may be positioned in the gap 144 and may laterally extend between the first and second side portions 1 10, 1 12.
• the lateral spacing between the first and second side walls 1 10, 1 12 i.e., the width of the gap 144) may be sufficient to receive at least a portion of the switch cover of the toggle switch assembly upon which the toggle switch lockout clip 100 will be mounted, as described in greater detail below.
• the central region 1 16 of the clip body 102 may define the through hole 1 14.
• the through hole 1 14 may laterally extend through the clip body 102 from a first side 146 of the clip body 102 to a second side 148 of the clip body 102. Therefore, as shown in Fig. 6, a tag 150 may be connected to the toggle switch lockout clip 100 by passing through the through hole 1 14 in the switch body a tether 152 (e.g., a pin, a cord, a wire, a clip, a lock or the like) connected to the tag 150.
• the tag may include indicia, such as written text (e.g., "Do Not Remove"), color (e.g., the color red) and/or graphics, warning others not to remove or otherwise tamper with the toggle switch lockout clip 100.
• the disclosed toggle switch lockout clip 100 may be mounted on a toggle switch assembly 200 to inhibit (if not eliminate) inadvertent actuation of the toggle switch assembly 200. While one particular toggle switch assembly (assembly 200) is described below, those skilled in the art will appreciate that the disclosed toggle switch lockout clip 100 may be configured for use on various toggle switch assemblies without departing from the scope of the present disclosure.
• the toggle switch assembly 200 may include a toggle switch 202, a switch cover
• the toggle switch 202, the fulcrum 206 and the stop 210 may be mounted on the switch board 208.
• the toggle switch 202 may be moveable at least between an "ON" position (see Fig. 1 ) and an "OFF" position. In the "OFF" position, the toggle switch 202 may in a rearward position wherein the axis T of the toggle switch 202 is at an angle P (e.g., about 5 to about 45 degrees) relative to the vertical axis V.
• the switch cover 204 may be pivotally connected to the fulcrum 206, and may be moveable between a closed position (see Fig. 1 ) and an open position. With the switch cover 204 in the open position, the toggle switch 202 may be moved to the rearward (i.e., "OFF") position.
• the toggle switch lockout clip 100 may be mounted on the toggle switch assembly 200 as described below. Other techniques for mounting the toggle switch lockout clip 100 on the toggle switch assembly 200 are also contemplated. First, the leg portion 106 of the clip body 102 may be placed on the switch board
• the toggle switch lockout clip 100 may be aligned with the toggle switch 202 and the switch cover 204 of the toggle switch assembly 200. Specifically, the toggle switch lockout clip 100 may be aligned such that the engagement portion 108 (Figs. 3 and 4) of the clip body 102 is in alignment with the toggle switch 202 and the gap 144 between the first and second side portions 1 10, 1 12 is aligned to receive a portion of the switch cover 204. With the leg portion 106 on the switch board 208 and the toggle switch lockout clip 100 aligned, the latch portion 104 of the clip body 102 may be urged in the direction shown by arrow M.
• the tip 205 of the switch cover 204 may cam along the camming surface 132 of the guide tab 128 until the tip 205 of the switch cover 204 is positioned in the hook gap 126 between the hook member 120 and the extension member 1 18 of the latch portion 104.
• the mounting process may be complete once the latch portion 104 of the toggle switch lockout clip 100 is properly latched onto the switch cover 204 of the toggle switch assembly 200.
• Forming the clip body 102 from a springy, resilient material may facilitate the process of latching the latch portion 104 onto the switch cover 204.
• the toggle switch lockout clip 100 may secure the toggle switch 202 in the "OFF" position and may secure the switch cover 204 in the open position.
• the engagement portion 108 (Figs.
• toggle switch lockout clip 100 may protrude toward the toggle switch 202 and the switch cover 204 of the toggle switch assembly 200 to create an interfering obstruction that may inhibit movement of the toggle switch 202 to the "ON" position and that may inhibit movement of the switch cover 204 to the closed position.
• a method for locking out a toggle switch assembly that includes a toggle switch and a switch cover.
• One embodiment of the disclosed method is shown in Fig. 7 and is generally designated 300.
• the method 300 may begin at Block 302 with the step of powering off the toggle switch assembly.
• powering off the toggle switch assembly may require (1 ) opening the switch cover and (2) moving the toggle switch to the rearward "OFF" position.
• a toggle switch lockout clip may be provided.
• the toggle switch lockout clip may include a latch portion, a leg portion and an engagement portion.
• the toggle switch lockout clip may also include side portions for receiving the switch cover and a through hole for connecting a tag to the toggle switch lockout clip.
• the toggle switch lockout clip may be mounted onto the toggle switch assembly.
• the mounting process may include latching the latch portion onto the switch cover of the toggle switch assembly to approximate the engagement portion of the toggle switch lockout clip with the toggle switch and the switch cover of the toggle switch assembly.
• a tag may be connected to the toggle switch lockout clip mounted on the toggle switch assembly.
• the tag may include indicia, such as written text (e.g., "Do Not Remove"), color (e.g., the color red) and/or graphics, advising others not to remove the toggle switch lockout clip. Accordingly, the disclosed toggle switch lockout clip and method may inhibit (if not eliminate) inadvertent actuation of a toggle switch assembly.

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• Switch Cases, Indication, And Locking (AREA)
• Mechanical Control Devices (AREA)
• Tumbler Switches (AREA)
• Lock And Its Accessories (AREA)

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Applications Claiming Priority (2)

Publications (1)

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ID=49213134

Family Applications (1)

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Citations (2)

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• 2012
  • 2012-09-05 US US13/604,312 patent/US8835781B2/en active Active
• 2013
  • 2013-09-05 CN CN201380038702.2A patent/CN104488054B/zh active Active
  • 2013-09-05 WO PCT/US2013/058312 patent/WO2014039710A1/en not_active Ceased
  • 2013-09-05 CA CA2826477A patent/CA2826477C/en active Active
  • 2013-09-05 EP EP13763404.4A patent/EP2893542B1/en active Active
  • 2013-09-05 JP JP2015530161A patent/JP6157626B2/ja active Active
  • 2013-09-05 BR BR112015002985A patent/BR112015002985B8/pt active IP Right Grant

Patent Citations (2)

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