Two-handed retention on various handle configurations

The Adult Human Hand: Some Anthropometric and Biomechanical Considerations

“…Two other studies (Garrett, 1968;Garrett, Alexander, and Bennett, 1967) were concerned with spatial requirements for, and biomechanical capabilities of, the hand. Altogether, six separate factors were investigated in these two studies.…”

“…Table 7 summarizes the results of one study (Garrett, 1968) in which several of these manual abilities were measured during barehanded operation and while doing the same tasks encumbered independently by uninflated and inflated full-pressure gloves. The other study (Garrett, Alexander and Bennett, 1967) measured the force loading on various handles (Figure 4) against which volunteer subjects could retain their grip. The data summarized in Figure 5 were collected from a simulated-aircraft downwardejection situation with the subjects' hands between their knees gripping one of the four types of handles, with the force applied to pull the handle downwatd.…”

Push Forces Exerted in Sixty-Five Common Working Positions

“…Fox, 1957;W. F. Fox, 1967;Garrett, Alexander, and Bennett, 1967;Konz and Day, 1966;Molbech, 1963;Pierce, 1960;Roberts, Provins, and Morton, 1959;Rohmert, 1960aRohmert, , 1966Streimer and Springer, 1963;Tornvall, 1963;and Watt, 1963.…”