Recent Blogs
Worm-gear Jumping Motion with Cam Mechanism: How It Works, Parts, Uses & Snap Energy Formula
See how a worm-driven cam loads and releases a spring follower. Compare ideal spring forces and stored energy from your entered spring settings.
Watch-Winding Stop Form 3: Animation and Turn-Count Calculator
Compare two entered winding-turn references, their midpoint and span, and convert the midpoint into ideal advances and cumulative arbor rotation.
Watch-Winding Stop Form 2: Animation and Angle-Count Calculator
Explore a Geneva-type winding-stop illustration and calculate equal notch pitch, angular spans in pitches and remaining entered advances.
Pin-Geared Watch Stop: Declared Stop-Work Indexing
Pin-geared watch stop mechanism explained — how watchmakers freeze the balance for hacking seconds, with tolerances, formulas and real calibre examples.
Double Three-legged Gravity Escapement: How Denison's Turret Clock Mechanism Works
Explore two locking wheels, three shared lifting pins and falling gravity arms. Calculate ideal extra-lift energy, mean impulse power and wheel-step timing.
Watch Train: Ideal Compound Gear-ratio and Speed Calculator
Follow a barrel-to-escape going train and calculate ideal speeds from four entered ratios and barrel period. Tooth geometry and torque are not calculated.
Riefler Double Escape Wheel: Front View and Reference Comparisons
Explore the distinct driving and locking wheels of a Riefler escapement. The accompanying number and angle comparisons do not predict contact or clock rate.
Stud Escapement: Animation, Torque and Work Calculator | FIRGELLI
See alternating front and rear pallets hold and release the wheel. Calculate ideal tangential force, wheel work, stud pitch and drop-to-pitch ratio.
Star-wheel Escapement Mechanism: How It Works, Parts, Diagram and Formula Explained
Star-wheel escapement explained: how the mechanism gates impulse in clockwork, the geometry, real workshop examples, formulas, and design tradeoffs.
Single-pin Pendulum Escapement: How It Works, Parts, Geometry and Uses Explained
Single-pin pendulum escapement explained — how the one-pin escape wheel impulses a pendulum, where horologists use it, and how to size the geometry for low...
Pendulum Anchor Escapement: Timing and Wheel Indexing
Explore an anchor pendulum escapement. Calculate ideal finite-amplitude period, beat interval and wheel speed for a half-tooth-per-beat indexing convention.
Lever Chronometer Escapement: Hiscox Item 1185 Phase Viewer
A qualitative four-phase viewer for the lever chronometer escapement relationships described in Hiscox item 1185, with no timing or restoration prediction.
Hook-tooth Escapement: Ideal Pendulum and Tooth Timing | FIRGELLI
Compare ideal pendulum length, beat rate, tooth pitch and wheel speed under a one-tooth-per-beat assumption. The schematic does not solve escapement contact or clock accuracy.
Mean-Time Sundial: Equation of Time and Longitude
Convert an apparent sundial reading to local mean and zone-standard time using an annual equation-of-time approximation and a separate longitude correction.
Duplex Escapement Mechanism: How It Works, Diagram, Parts, Formula and Uses Explained
See the normal duplex watch escapement’s locking and impulse teeth, balance roller and return swing. Calculate wheel speed, tooth pitch and hand gearing.
Double Tri-toothed Pendulum Escapement Mechanism: How It Works, Parts, Geometry & Uses Explained
Explore the double tri-toothed pendulum escapement with alternating locks, a triangular arbor and curved pallets. Calculate release timing and tip motion.
Dead-beat Clock Escapement Mechanism Explained: Pallet Geometry, Diagram & Calculator
Watch dead-beat pallets lock, impulse and release a 30-tooth wheel. Calculate pendulum period, beat rate, tip force and ideal impulse work with enlarged contact views.
Cycloidal Pendulum Movement Explained: How Huygens Cheeks, Tautochrone Geometry, and Isochronism Work
See how cycloidal cheeks guide a constant-length pendulum cord. Calculate ideal beat length and compare an ordinary circular pendulum’s clock error at two amplitudes.
Compound Compensating Pendulum: How It Works, Parts, Formula and Diagram for Precision Timekeeping
Explore two bimetallic compensation arms and their side weights. Calculate thermal curvature, physical-pendulum period and daily rate under stated assumptions.
Compensating Pendulum Bob Mechanism: How It Works, Parts, Diagram and Uses in Precision Clocks
Explore opposing rod and liquid-center thermal movements in a mercury-jar pendulum. Compare rod growth and uncompensated point-bob clock-rate change.
Centrifugal Pendulum Mechanism: How It Works, Diagram, Formula, Parts and Uses Explained
Explore a clock-driven conical pendulum. Calculate orbit period, speed, cone angle and inward force from suspension geometry, bob mass and gravity.
Arnold Chronometer Escapement Mechanism: How the Spring Detent Works, Parts, and Diagram
Follow one-way unlocking and impulse in a spring-detent escapement. Calculate daily tooth releases and wheel revolutions, with clearly defined angular comparisons.
Antique Watch Escapement Mechanism: How It Works, Parts, Diagram, and Beat Rate Formula
Explore a verge-watch crown wheel, pallet flags and balance. Calculate beats and intervals, distinguish full oscillation frequency, and understand the illustrative angle index.
Antique Clock Escapement Mechanism: How It Works, Parts, Diagram, and Calculator
Follow a pendulum anchor escapement and calculate beat rate, tooth advance and wheel speed. Learn why a seconds beat means a two-second full pendulum period.
Going Train Calculator: Clock Gear Ratios and Speeds | FIRGELLI
Calculate speeds and barrel period through four clock-train gear stages. Explore direction reversals and distinguish gear ratios from escapement timing.