Electrical & Electronic Symbols

Couplings and Mechanical Controls Symbols

These symbols indicate controls and mechanical coupling links, actions and connections of static or dynamic devices operated manually or automatically.

Symbols of Couplings and Mechanical Controls
Symbol Description Symbol Description
Link / Mechanical, optical, hydraulic or functional connection symbol Link / Mechanical, optical, hydraulic or functional connection
Generic symbol		   Link / Connection symbol Link / Connection
Delayed action symbol Delayed action   Delayed action symbol Delayed action
Direction of force or movement symbol Direction of force or movement   Sense of the strength of the movement of the rotation symbol Sense of the strength of the rotation’s movement
Locking device symbol Locking device   Symbol of the activated locking device, with left movement block Activated locking device, with left movement block
Coupling or retention device symbol Coupling or retention device   Symbol of activated coupling or retention device Activated coupling or retention device
Brake symbol Brake   Symbol of released coupling or retention device Released coupling or retention device
Mechanical clutch symbol Mechanical clutch   Mechanical clutch, clutched symbol Mechanical clutch
clutched
Mechanical clutch disengaged symbol Mechanical clutch
disengaged		   Mechanical interlock symbol Mechanical interlock
Automatic return symbol Automatic return
The triangle indicates the direction of the return		   Symbol of the mechanical interlock between two devices Mechanical interlock between two devices
Ratchet symbol Ratchet
no automatic return		   Embedded ratchet symbol Embedded ratchet
no automatic return
gear coupling symbol Gear coupling
+ Info		   Ratchet released symbol Ratchet released
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