spring balance

noun

a device in which an object to be weighed is attached to the end of a helical spring, the extension of which indicates the weight of the object on a calibrated scale

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The safety-valve is seen at the top of the dome, at Y, and the spring-balance by which the load is adjusted is shown at Z.

A quartz spiral spring-balance will be appreciably stronger in hot weather.

To Dr. Hooke must also be credited the invention of that delicate but efficient device, the hair-spring balance for watches.

However, it is actually almost a half, as you see by this spring-balance here.

The instrument referred to was a huge spring-balance with which it was proposed to weigh Flathootly.

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