Dumbwaiters
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Dumbwaitersare a practical, time-saving appliance and are used in today’s residential and commercial buildings to facilitate the transportation of goods from one floor to another. Goods may include firewood, food, laundry, documents, equipment, books and mail, among others. The first known use of a dumbwaiter dates back to the Roman Empire; dumbwaiters were still in common use and assisting servants at Thomas Jefferson’s home in Monticello, Virginia.
Dumbwaiters, while similar to elevators, are not intended to carry people. Depending on the manufacturer and type, they can lift loads that range from 50 to 1000 lbs. They can be manually operated with a rope on a pulley, or have a more sophisticated operation type, such as a hydraulic system or an electrically operated system with motors and controls. The physical components of a dumbwaiter include an enclosed shaft, suspended movable frame, operation mechanics, and rails. The devices are typically made of elements which are similar to those used in commercial电梯包括安全功能，其中包括，例如，磁门开关，以防止系统从与打开的门运行。送菜升降机轿厢是不锈钢材质，并以高品质的木饰面。门选项包括单人，双人或门控条目。
When selecting a dumbwaiter for home or office use, considerations should include: what you will be hauling, how heavy a load you will be lifting, how much space is available, operation type, style, manufacturer’s warranty and whether it is for new construction or for a retrofit. Manual dumbwaiters are less expensive than electric, motor driven models, although electrically operated dumbwaiters are far more convenient.
ASME A17.1-2000, the American Society of Mechanical Engineers code governs construction and/or operation of Dumbwaiters.
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