The Brown Recorder which has been factory equipped with a ball point pen functions very poorly as the pen skips and at times does not write at all. The holder that contained the pen was weighted with several heavy 1/4 in. iron bolts, as shown in Figure 1, with the result that the pen performs very satisfactorily. This device has been successfully employed on our recorder for several months.
Bernard M. Mitzner, "Improvement of Brown Recorders Equipped with Ball Point Pens," Appl. Spectrosc. 13, 80-80 (1959)