The history of weighing scale

What's the history of Weighing Scales

Weighing scales are also called "weighment ",Weighing apparatus. Or the weighing instruments with unequal arms are called scales, or refers to the lifting and tie bar scales that measure the weight of things by looking at the scales, or refers to the scale bars. During the Warring States period, there were unequal arm weighing apparatus. It has not been decided when the domestic steelyard started. The unearthed king of Chu bronze balance pole has a scale of ten equal parts. It is speculated that it is a sign of hanging weight and weight in different parts when weighing. It is likely to be a kind of weighing instrument in the transition from equal arm balance to pole scale. After the Eastern Han Dynasty, it evolved into a scale to see the weight from the scale star.

Steelyard:

It is a small weighing instrument with wooden or metal rod with star point and taper as the main body, and equipped with mound (weight), mound rope and scale plate (or hook). According to the scope of use and the size of the scale, it can be divided into three kinds, i.e. chain, pan scale and hook scale. The steelyard is a first-class lever. It is a simple weighing instrument that uses the principle of lever balance to weigh. It is composed of a wooden steelyard with a steelyard star, a metal steelyard hammer and a lifting rope.

The steelyard scale consists of the first kind of lever, which focuses on the outer end of the fulcrum. When weighing, according to the weight of the object to be weighed, the weight and the weight rope move on the scale pole to maintain balance. According to the star point on the scale pole corresponding to the weight rope during balance, the mass indication of the weighed object can be read out. The structure and manufacturing process of the scale are simple, light and small, easy to carry and use, low cost, but low accuracy.

The steelyard scale is one of the most long-standing scales invented by human beings. Among the artifacts unearthed from the Chu tomb in the eastern suburb of Changsha, Hunan Province, China, there are various refined weights, scales, scales, silk threads and lifting ropes.

Among the relics unearthed from the Han Tombs in China 200 BC, there are various sizes of pole weights. In 1984, a complete wooden steelyard was found in a single kiln brick Tomb of Han Dynasty in Yaoshang village, Changxing Town, Meixian County, Shaanxi Province, China. It was made in the first century B.C. - A.D.