Abstract: A replaceable blade utility knife is disclosed that uses permanent magnet to facilitate opening the knife handle for blade replacement. The utility knife has a handle made of two halves. The halves are held together by a connector, and rotate around the connector when the knife handle is opened. Permanent magnets are mounted in each half of the knife handle to separate the halves, rotate the halves to the desired open position, and to hold the halves in position while the blades are being changed. The permanent magnets act as a magnetic actuator for opening the handle halves.

Abstract: A moveable gate for infants or dogs is used in doorways, hallways, stair landings and other household positions to provide a safe barrier for the child or dog. The gate, formed of a flexible material which pulls out of a housing in the manner of a window shade, has a jamb mounting at the housing end and a latch at the extended end of the curtain-like barrier. Both are releasable from a fixture which attaches to the door jamb, wall or stair rail post, so that the infant gate can be quickly released and moved to another location in the house where additional such jamb mountings are attached or to another house which has similar door jamb pieces installed. Important features are the manner in which the gate latches, a mechanism for tightening the curtain-like barrier into a nearly solid gate after it has been latched, and childproof devices for releasing tension in the gate when it is to be retracted.