Abstract: A head cover that provides protection for golf club irons and wedges and includes a positive locking mechanism. Multi-piece design of the present invention emulates the contours of the face, back, sole, crown, toe, and heel of irons and wedges as well as providing a tab comprised of positive and negative magnetic clasps for securely locking the head cover to the golf club. Back and face panels extend to provide protection for the hosel and ferrule. The wear pad located at the joining point of the base, back, and face panel gives strength to the location where they are attached. An integral anti-slip feature aids head cover security. The invention achieves a positive lock using a mechanism comprised of a tab with a magnetic clasp that prevents the head cover from falling off. A multi-layer binding design with topstitching is implemented.

Abstract: An automatic door operator for swing doors which uses a worm gear transmission to connect the motor to a belt and pulley which in turn is connected to a spur gear and drive gear. The door arm of the swing door is connected to a double-ended shaft which is part of the drive gear. A rack and pinion gear and spring are used to provide the closing force to the door arm. The motor is mounted over the spring and the belt and pulleys are located alongside the motor which results in a compact non-handed design.

Abstract: A locking mechanism to be applied to an inactive door of a set of active and inactive double doors coordinated so that the inactive door closes first relative to a frame followed by the closing of the active door. Adjustable drive means is employed capable of either lengthwise contraction upon the application of a force between first and second separated locations on the adjustable drive means exceeding a threshold value, or linear movement without substantial contraction upon the application of a force less than the threshold value. A door-lock actuating element is coupled to the adjustable drive means at the first location. A door-locking element is coupled to the adjustable drive means at the second location. The adjustable drive means, the door-lock actuating element, and the door-locking element are supported at an upper or lower corner of the inactive door.

Abstract: An electromagnetic lock including an armature and an electromagnet with the armature adapted for floating attachment to a door by a plunger-bolt assembly fixed to the door, and an electromagnet adapted for fixed attachment to a door frame. A door-movement alert switch structure comprising a pushbutton switch supported on the electromagnet, a plunger supported on the plunger-bolt assembly, and a spring force-biasing the plunger into mating contact with the switch when the door is electromagnetically locked to establish a first switch-actuation state. The force-biased spring maintains the switch in its first state while the armature is magnetically restrained. When the door is opened a door-movement distance slightly less than the armature float distance, the plunger is partially drawn into a plunger housing fixed on the plunger-bolt assembly. The switch responds by transferring to a second switch actuation state indicating an attempt to open the magnetically locked door.