Beat
The striking of the escape wheel upon the pallet or locking device. When an escapement is in adjustment, so that the striking of the escape wheel upon the pallets is even and equal it is said to be in beat and when it is not in adjustment it is said to be out of beat. The latter, says Saunier, may be due to any of the following causes: I. One or even both of the pins that secure the hairspring in the collet and stud are loose. 2. The spring is strained between the two curb pins. 3. The Hairspring stud not having been placed immediately over the dot on the balance when putting the escapement together.