Abstract: The present invention is a door chime. The door chime has a decorative cover connected to a sound module including sound controls. The decorative cover is shiftable relative to the sound module from a first position in which the decorative chime will be displayed during normal use, to a second position to allow access to the sound controls in the second position. The connection between the sound module and the decorative cover allows for either a sliding connection or a rotating connection depending on the desired configuration. The power module for the door chime is interchangeable between a battery powered and hard wired module.

Abstract: The present invention provides a decorative door chime particularly well suited to festive occasions. The chime includes a speaker which is suspended on one side of the door by a strap, and a door-knocker actuated trigger switch suspended on the other side of the door by the strap. The strap encloses the electrical connections between the speaker and the trigger. The sound generator plays songs, tone sequences, recorded voice messages, etc., in response to actuation of the trigger switch.

Abstract: The present invention provides a decorative door chime particularly well suited to festive occasions. The chime includes a speaker which is suspended on one side of the door by a strap, and a door-knocker actuated trigger switch suspended on the other side of the door by the strap. The strap encloses the electrical connections between the speaker and the trigger. The sound generator plays songs, tone sequences, recorded voice messages, etc., in response to actuation of the trigger switch.

Abstract: A sort of tubular door lock whose inside knob or outside knob can be forced to rotate by each other's rotation and force a rotating unit to turn pushing and overpassing a projection of a knocking spring to get the knocking points at its both ends to knock on a bell for ringing. In addition, when said inside knob is locked up, the outside knob has no supporting force for making the latch rotated but can give an idle turning only.

Abstract: An improved knob lock commonly used, which comprises a bell inside. The main part of which is a rotator which is turned by rotating either of the knobs and has two extending-out springs to which are attached a steel ball respectively at their ends. Hindrance rods, which are used to prevent the springs from passing freely, make the springs bend until they are forced past the hindrance rods to knock hard on the bell giving out a ringing sound at the same time.