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Device for Measuring Rate of Milk Flow¹

Department of Dairy Science, The Pennsylvania State University, University Park

ABSTRACT

The rate at which cow's milk flows has been investigated by a number of workers, using a variety of equipment to obtain and record observations (1, 2, 3, 4, 5, 6, 7, 8). An apparatus has been developed in this laboratory and found to perform exceptionally well as a means of recording the milking profile. It is essentially a continuous-feed kymograph (Figure 1), a self-contained, enclosed unit with an opening on one side through which notations can be made on the record. The weighing mechanism consists of a spring with a known stretch coefficient. In our studies we have used springs with stretch coefficients of 7 or 10 lb. per inch of expansion. The stylus is attached to a unit which operates on ball bearings to reduce friction. A steel clip extends from the unit and rests on a tubular collar fitted over and extending the full length of the weighing spring.

¹ Authorized for publication on June 11, 1958, as Paper No. 2267 in the Journal Series of the Pennsylvania Agricultural Experiment Station.