Frictional Rest Escapements

In this group of escapements, the oscillation system (balance, pendulum) does not get to enjoy the freedom of swinging free from time to time (detached escapement), but it does not have to rewind the wheel in phases. (recoil escapement). Nevertheless, it is not entirely out of work in this phase, because it has to overcome the frictional rest that develops due to the continues contact of the escapement and the works of the wheels...

Domestic clocks
time	term/inventor	what for
since 1715	Graham-Escapement/George Graham	Precision domestic clocks
since 1741	Pin Wheel Escapement/Amant	clocks on towers

Portable clocks
time	term/inventor	what for
since 1695	Cylinder-Escapement/Thomas Tompion	pocket- and wrist-wathches
since 1748	Duplex-Escapement/Pierre Le Roy	pocket-watches

...This rest seems to be really neat, as clocks (especially Domestic Clocks) fitted with a frictional rest escapement sometimes show excellent running results. But for Domestic Clocks this only works, when the amplitude of the pendulum is quite small and particularly constant. Alterations of the pendulums amplitude always means a slight change in running and therefore is no good for the user of this clock. Why not got to the page where the Recoil Escapement is explained and you can find out what the craftmen of the olden days did against this evil, when the amplitudes were not able to be kept constant and small.