U.S. Patent No.1,466,559: Exercising device.
1. A device for exercising the teeth comprising a plate adapted to correspond with the articulation of the user, and means connected with the plate for exerting traction on said plate whereby the teeth are positively exercised, as and for the purpose set forth.
2. A device for exercising the teeth comprising a plate of suitable material, means for reinforcing said plate, said reinforcing means projecting from said plate in the form of an eye, and traction-producing means secured to said eye.
3. A device for exercising the teeth comprising a plate formed to conform to the articulation of the user, and traction-producing means adapted to be attached to said 10 plate, said traction-producing means comprising a pliable elastic member.
4:. As a new article of manufacture, a de– wearer vice for exercising the teeth, comprising a plate shaped to conform to the contour of the mouth and having on each side comparatively deep depressions to receive the teeth, said depressions corresponding in number to the teeth of the user so that each tooth will be seated in a depression, the plate being rovided with a member projecting from gs front portion whereby when traction is exerted upon said member, each individual tooth will be exercised.