Elliot Handler holds credit for creating the Barbie doll, which debuted in 1959. Ruth named her creation after their daughter Barbara. It remains one of the top-selling dolls on the market. Mattel introduced the talking Chatty Cathy doll in 1960. The Handlers had made a tradition of naming their toys after family members, and when Barbara Handler married Allan Segal, they came out with Allan, Ken's friend. The 1965 talking doll Baby Cheryl was named after the Handlers' first grandchild, and the Todd doll in the Barbie line was named for their grandson. Elliot Handler holds credit for developing the first talking
Air handler The blowers in an air handler can create substantial vibration and the large area of the duct system would transmit this noise and vibration to the occupants of the building. To avoid this, vibration isolators (flexible sections) are normally inserted into the duct immediately before and after the air handler and often also between the fan compartment and the rest of the AHU. The rubberized canvas-like material of these sections allows the air handler components to vibrate without transmitting this motion to the attached ducts. The fan compartment can be further isolated by placing it on a spring suspension, which