1. A TIMING ESCAPMENT MECHANISM FOR MECHANICAL TIMERS AND THE LIKE ADAPTED FOR MOVEMENT ABOUT A PREDETERMINED AXIS IN CONNECTION WITH A BODY IN MOTION, COMPRISING IN COMBINATION, A FRAME ELEMENT ADAPTED TO BE CARRIED BY SAID BODY, AN OPERATING ARBOR PIVOTED IN SAID FRAME ELEMENT FOR OSCILLATORY MOTION ON AN AXIS PROVIDED FOR ALIGNMENT WITH SAID AXIS OF MOVEMENT, A ROTARY TIMING ESCAPEMENT WHEEL, MEANS CONNECTED WITH SAID WHEEL TRANSMITTING ROTATIONAL TIMING MOVEMENT AND CONTROL THEREBY EXTERNALLY OF SAID MECHANISM, MEANS PROVIDING A BALANCED ESCAPEMENT LEVER AND PALLET IN CONNECTION WITH THE ARBOR FOR OSCILLATION ABOUT SAID PIVOT AXIS TO CONTROL THE ESCAPEMENT WHEEL AND SAID TIMING MOVEMENT, AN ESCAPEMENT SPRING OF THE CANTILEVER BEAM TYPE HAVING ONE END IN MOTION-TRANSMITTING ENGAGEMENT WITH THE ARBOR AND EXTENDING RADIALLY THEREFROM TO A FIXED ANCHOR POINT AT ITS OUTER END IN THE FRAME ELEMENT, AND MEANS MOVABLE ALONG SAID SPRING BETWEEN SAID OUTER END AND THE ARBOR IN CLAMPING ENGAGEMENT WITH AN EXTENDED PORTION OF ITS LENGTH FOR RIGIDLY FIXING THE RADIALLY-OUTER END PORTION THEREOF AND ADJUSTING THE LENGTH OF THE RADIALLY-INNER FREE END PORTION OF THE SPRING FOR OSCILLATION WITH THE ARBOR AT DIFFERENT TIMING RATES.