Q021218
Engaged mechanical coupling
This indication identifies engagement between the represented mechanical elements.
IEC
IEEE / ANSI · Q021218
ANSI/IEEE Engaged mechanical coupling form
IEEE-library form of engaged mechanical coupling: this indication identifies engagement between the represented mechanical elements.
In plain English
What does ANSI/IEEE Engaged mechanical coupling form mean?
This reference locates engaged mechanical coupling in Autodesk's IEEE-oriented mechanical controls, coupling family. This indication identifies engagement between the represented mechanical elements. The represented elements share the documented motion-transmission relationship in the engaged state. That state says nothing by itself about supply energisation or electrical contact position. The public library uses Q021218 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
A simple example
Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.
What the drawings help you do
Show the driving/driven device identities and connect the engagement state to its actual feedback if used. Alternate publisher graphical forms are retained within this one concept. Document the elements coupled and the applicable state condition. Different published graphical forms for the same engagement are kept in one concept record. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
This particular reference
IEEE-library form of engaged mechanical coupling: this indication identifies engagement between the represented mechanical elements. Different published graphical forms for the same engagement are kept in one concept record.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
- Rating
- A value stating the conditions for which equipment is specified.
Read the source: Autodesk IEEE Symbol Preview: Mechanical Controls, Coupling
IEEE / ANSI · Engaged Joint
Autodesk IEEE Symbol Preview: Mechanical Controls, Coupling, block Q021218. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · Q021218
What it represents
This reference locates engaged mechanical coupling in Autodesk's IEEE-oriented mechanical controls, coupling family. This indication identifies engagement between the represented mechanical elements. The represented elements share the documented motion-transmission relationship in the engaged state. That state says nothing by itself about supply energisation or electrical contact position. The public library uses Q021218 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.
Show the driving/driven device identities and connect the engagement state to its actual feedback if used. Alternate publisher graphical forms are retained within this one concept. Document the elements coupled and the applicable state condition. Different published graphical forms for the same engagement are kept in one concept record. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
How to read it
- Document the elements coupled and the applicable state condition.
- Different published graphical forms for the same engagement are kept in one concept record.
Information to show or reference
- Identify the associated device, circuit or diagram boundary.
- Document the elements coupled and the applicable state condition.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.
A distinction that matters
Different published graphical forms for the same engagement are kept in one concept record.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview: Mechanical Controls, Coupling
Public IEEE-oriented Mechanical Controls, Coupling table explicitly lists Q021218 as Engaged Joint. This supports the vendor convention context, not reproduction of the publisher graphic.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
Explore related references
Put the reference into a drawing workflow.
Elora Grid helps electrical teams work with drawings, specifications and equipment information. Explore the drafting workflow or join the early-access waitlist.