In the art of aviation, and in the construction of air-craft, our French, German, and American rivals were very efficient pacemakers in the aerial race for supremacy, and during the years 1909-12 we were in grave peril of being left hopelessly behind.
"The Mastery of the Air"
William J. Claxton
These two pacemakers in the small pen kept the sheep coming so fast that every worker below had a task cut out for him.
"The Call of the Canyon"
Zane Grey
There are instances in which it would be to the mutual interest of employer and employee to increase the speed of work, but conditions may limit or forbid the use of pacemakers.
"Increasing-Human-Efficiency-in-Business-a-contribution-to-the-psychology-of-business"
Scott, Walter Dill