The Swinging beater uses a similar design as the standard beater but incorporates another pivot point that allows the reed and battens to swing in relation to the swords. This pivot point at the top of the beater allows the weaver to always keep the reed perpendicular to the warp threads regardless of the beater position.
Please note that the 15 3/4” Dorothy loom changed a little in 1996. Older models are about 3/4” smaller than the newer ones, despite having the same name "15 3/4” Dorothy." If you are in any doubt as to the generation of your loom, give us a call and we will help you measure. Leclerc will still make parts for the older looms, but the default swinging beater is one built for the newer looms.