Recent Blogs
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.
Watch Stop: Hacking-lever Illustration and Timing Conversion
Explore a generic balance-stop lever and convert beat rate to full-oscillation frequency and period. Stopping forces and restart performance are not predicted.
Watch Regulator: Ideal Hairspring Length and Frequency Comparison
Explore how effective hairspring length affects an ideal balance oscillator. The calculated rate change is an estimate, not movement calibration.
Equatorial Sundial: Latitude and Axis-orientation Comparison
Explore a polar gnomon and equatorial ring. Compare latitude with an entered setting offset and 15-degree hour spacing; shadow and clock time are not calculated.
Riefler Double Escape Wheel: Side View and Angle Comparisons
See the coaxial Riefler driving and locking wheels in side view. Compare entered angles and ideal tooth pitch without treating them as clock setup targets.
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.
Three-toothed Escapement: Pendulum Period and Geometry
Explore Hiscox’s three-long-tooth escapement, pallets and stops. Calculate pendulum period and displayed angular geometry; wheel rate and accuracy are not predicted.
Three-legged Pendulum Escapement: Three-stroke Timing
Explore Hiscox’s tri-tooth escapement and calculate wheel rate from an entered pendulum stroke interval. Impulse energy and clock accuracy are not calculated.
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.
Stem-winding Movement Explained: Keyless Works Mechanism, Parts, and Crown-Turn Formula
Stem-winding movement explained — how the crown, clutch, and winding pinion drive a watch mainspring, with formulas, tolerances, and worked examples for watchmakers.
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.
Simple Pendulum: Period, Gravity and Finite Amplitude
Calculate ideal simple-pendulum length from full period, gravity and swing amplitude. Compare finite-amplitude and small-angle results and the half-period beat.
Mudge Gravity Escapement: Two-Pallet Principle and Gravity-Arm Energy
Explore the two-pallet sequence of Mudge's gravity escapement and calculate ideal gravity-arm energy, center-of-mass drop and mean moment over a selected fall.
Double Three-Legged Gravity Escapement: Geometry and Timing
Explore a double three-legged gravity escapement and calculate ideal leg spacing, chord and arc pitch, plus alternating-position timing from mean wheel speed.
Mercurial Compensation Pendulum: First-Order Thermal Balance
Explore historical mercurial pendulum compensation and a first-order balance between rod growth and mercury center-of-gravity rise, including jar expansion.
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.
Pin-Wheel Escapement: Declared Beat-to-Pin Kinematics
How the Pin-wheel Escapement works, with formulas, tolerances, and real clockmaking examples. Compare it to deadbeat and anchor escapements for tower clocks.
Lever Escapement: Hiscox Item 1184 Relationship Viewer
Explore the escape wheel, lever, pallet and balance pin in Hiscox’s lever escapement drawing. Highlight their connections in an interactive relationship viewer.
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.
Harrison Maintaining Power: Energy and Equivalent Spring | FIRGELLI
Compare winding-interval energy, train power and an equivalent linear spring. Includes explicit torque and travel limitations; not a spring specification.
Harrison Maintaining Power: Winding and Torque Scenarios | FIRGELLI
Learn how maintaining power supplies a clock train during winding. Compare normalized torque percentages and entered hold-time assumptions.