J
James J. Kempf
Publications - 9
Citations - 42
James J. Kempf is an academic researcher. The author has contributed to research in topics: Barrel (horology) & Lever. The author has an hindex of 4, co-authored 9 publications receiving 42 citations.
Papers
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Patent
Shooting bow with pulleys
James J. Kempf,Rex E. Isenhower +1 more
TL;DR: In this article, the first and second cams are pivotally retained on the first limb, first cam axle or back to the second cam, and a first pulley and a second pulley on the barrel.
Patent
Reverse style crossbow
James J. Kempf,Rex E. Isenhower +1 more
TL;DR: A reverse-style crossbow with a bow riser, a barrel, a latch, a first limb, a second limb and a second cam is a crossbow as mentioned in this paper, where the first limb extends from a first end of the riser and the second limb from a second end of riser.
Patent
Projectile launching device with self-timing and without cam lean
James J. Kempf,Rex E. Isenhower +1 more
TL;DR: In this paper, the two cams include a launch string track, having identical, but mirrored, upper and lower cable tracks, and a single cable may replace the first and second cams.
Patent
Reverse style crossbow having four cable pulleys
Rex E. Isenhower,James J. Kempf +1 more
TL;DR: In this paper, a reverse-style crossbow with four pulleys is described, where the first and second cams are rotatably retained on distal ends of the first-and second-cams.
Patent
Shooting bow with reduced limb travel
James J. Kempf,Rex E. Isenhower +1 more
TL;DR: An extreme reverse crossbow, a reverse-style crossbow or a reverse style crossbow with a single stirrup includes two cams, one string, two pulleys and two cables as discussed by the authors.