Circular Curve Drawing Instruments TRIZ Cases

Pre-calculated apertures and radius markings support accurate circle layouts without access to the center point or complex measuring tools.

A push-type telescopic assembly retracts compass legs into housings, reducing prick hazards and storage damage.

A releasable anchor and movable marker holder keep the pivot stable while drawing multiple accurate target circles.

Axial locking head movement prevents angular displacement by engaging shoulder areas, eliminating complex intermediate pieces.

A drawing compass lever rotates on the pivot axis to lock arm spacing via yoke compression.

A multi-tool assembly housing a blade and writing utensil for seamless switching between cutting and drawing operations.

A parallel compass device uses guide wheels to draw arcs and circles without requiring center access.

A tubular writing device integrates geometry tools and pens using a magnetic lock system for effortless access.

A collapsible marking tool integrates a center punch and adjustable marker holders into one handle.

A scribe tool uses a dual-track marking tip and indicator to maintain vertical handle orientation during circle layout.

A drawing compass employs a ball joint gripping cap that pivots freely, resolving misalignment issues during circle drawing.

A framing square with a pivot opening and blade marking openings enables arc creation.

A centerless drafting compass uses a control dial and drive gear to adjust radius for drawing arcs.

A scissor equal divider uses pivoting indicator plates to mark equidistant lines.