Abstract: A device for inserting and/or removing pins from a roller chain includes a block having a cradle for immobilizing and temporarily holding a roller chain together while pins are being inserted or removed. The device has a pair of threaded bores aligned with a pin or pin opening of a roller chain received in the cradle, one threaded bore carries a screw having a ram portion operable to positively force a pin from the roller chain, the other threaded bore carries a screw operable to positively force a pin into the roller chain.

Abstract: A flag-locking mechanism for an external halyard flagpole having a pulley affixed near the top thereof and a halyard which runs over the pulley, the flag being carried on the outside run of the halyard, the locking mechanism including a housing constructed to be affixed to the flagpole near the top thereof beneath the pulley through which is threaded the inside run of the halyard, a locking pin moveable in the housing and toward an inside face of a wall thereof whenever the inside run of the halyard is moved upwardly, such frictional movement of the locking pin being capable of squeezing such inside run of the halyard between itself and the housing wall to arrest further movement of the halyard, an attachment to the locking pin for exerting a downward pull thereon to move same from its lock position into its unlock position including a cable disposed in the interior of the flagpole and extending downwardly therein to a level near the ground where it can be accessible, the lower end of the cable being fastened