Abstract: A strainer for fitting in a drain of a sink and for being self-cleaning of residual solid debris sticking to the strainer without a user having to touch the residual solid debris, shake the strainer, or hit the strainer against an object. The strainer includes a bowl, a handle, a stopper, and a scraper arm. The bowl fits snugly within the drain of the sink, and is perforated to permit fluid to pass therethrough, while collecting the residual solid debris. The handle is movably mounted through the bowl to manually remove the strainer from the drain of the sink. The stopper is rotatably connected to the handle, is disposed below the bowl, and sits in the drain of the sink. The scraper arm is affixed to, and rotates with, the handle. When the handle is rotated by hand manipulation, the scraper arm sweeps along the bowl self-cleaning the residual solid debris sticking to the bowl without a user having to touch the residual solid debris, shake the strainer, or hit the strainer against the object.

Abstract: A universal alarm system includes a first main component and a second main component. The first main component contains an internally-disposed continuous loop alarm circuit and is attachable to a first object that is to be protected against an unauthorized removal thereof. The second main component replaceably engages the first main component, by non-magnetic means, and contains an internally-disposed circuit and is attachable to a second object. The internally-disposed continuous loop alarm circuit of the first main component is in electrical communication with the internally-disposed circuit of the second main component when the first main component is engaged with the second main component, so that when the first main component and the second main component are separated from each other the internally-disposed continuous loop alarm circuit of the first main component activates an alarm and since the first main component remains with the first object, location of the first object is facilitated.

Abstract: An alarm system comprises a pair of interlocking components, which when separated causes an electrical switch operable in response there to change states and activate the alarm. The switch may be either a mechanical type device or a magnetic proximity type device. A cable may be attached to one or both components.