Abstract: A high speed blower feeds airstreams to a plurality of lower ducts that produce sheets of high velocity lower air stream moving upward through various gaps in a rake plate through which tines of a rotary pickup drum pass as the drum lifts a windrow of dry, brittle sesame seed crop, creating a lower "air seal" that prevents loss of large numbers of sesame seeds that pop out of the dry pods as a result of snapping and cracking of the dry crop material. The air seal prevents the seeds from falling through the gaps to the ground. The blower also feeds a plurality of upper ducts that produce a high velocity air stream flowing rearward over the upper surface of the matt, intercepting large numbers of sesame seeds that pop outward and upward from the pods and otherwise would be lost as a result of the snapping and cracking of the dry crop material.

Abstract: A compensator having an enlarged chamber is threaded onto the barrel of a handgun. The compensator has two equally sized, symmetrically positioned vertical upper ports aligned with matching ports in the threaded portion of the barrel, for vertically exhausting high pressure gas to produce a downward force that resists muzzle climb. The chamber also includes a pair of unequally sized, unsymmetrically positioned low pressure ports through which lower pressure gases are exhausted as the bullet leaves the chamber, compensating for rotation produced by the torque produced on the bullet by rifling of the barrel bore as the bullet accelerates.