Union made by D.H. Whittemore is another return that reverses direction
while in gear. The hand-driven gear and the central gear, which meshes
with the paring arm gear, have teeth on their edges and modified helical-like
teeth across their inner surface. All of the gears stay locked together
the shapes of the modifed teeth allow the paring arm to smoothly reverse
direction. Apples can be pared in both directions. This parer is marked
THE UNION and D.H. WHITTEMORE WORCESTER MA PAT. NOV. 11, 1866. This
design went through several modifications and was further developed by
Landers, Frary, & Clark.
To see a close-up of THE UNION embossing visit the Apple
section of our museum and look within Apple Anatomy under Apple Longitudinal-Section.