Vibrator/bouncer attachment for infant seats

In an infant support device including a resilient frame for supporting an infant thereon, the combination therewith comprising:

• a displacement mechanism connected to said frame including drive means for imparting vertical reciprocating movement to said frame, and shift means for shifting said drive means between a first position imparting a high frequency of vibration with low amplitude of displacement and a second position imparting a low frequency of vibration with a high amplitude of displacement to said frame.

An infant seat assembly comprising in combination:

• a resilient frame having a base and a front leg rest portion rigidly connected to said frame and extending substantially in a horizontal direction therefrom;
• and
• a displacement mechanism mounted at a free end of said leg rest portion including vibrating means for imparting oscillatory motion to said frame, said vibrating means including adjusting means for regulating the frequency of vibration of said frame.

In an article of furniture having a floor-engaging base and an upper resilient support portion, the improvement comprising:

• a vibrational mechanism drivingly connected to said support portion including means for reciprocating said support portion to impart a vibrating motion thereto, and means for adjusting said vibrational mechanism to correlate its frequency of vibration with the natural frequency of vibration of said support.