Abstract: A tilt switch includes a central electric contact member and a first electric contact terminal adapted to be mounted on a support. The central electric contact member defines a rolling area. An electrically conductive ball member is rollable on the rolling area. An electrically conductive shell member is mounted on the support to confine an accommodating space for the ball member, and has a second electric contact terminal in electric contact with the first electric contact terminal. Once the rolling area is tilted, the ball member will move by virtue of gravity to contact with an inner peripheral surface of the shell member so as to establish an electrical connection between the central electric contact member with the first electric contact terminal.

Abstract: A decorative member includes a housing having a chamber for receiving a frame of a light device. A sleeve is secured on one end of the frame. A spring is secured in the sleeve, a light member is electrically coupled between the spring and the frame. A lid is secured on the sleeve and spaced from the spring for electrically contacting with the spring when the spring is vibrated, and for generating a twinkling light when the spring is intermittently contacted with the lid. The housing may be attached to various kinds of objects for generating twinkling lights for the objects.

Abstract: Environmentally safe, non-mercury electronic switches having a sphere lubricated with an arc suppressant. Electronic tilt switches utilize an electrically conductive sphere and have good resistance to physical damage of the sphere caused by electrical arcing. A conductive sphere is coated with a lubricant that partially fills a hollow housing and prevents the electricity from pitting and corroding the ball.

Abstract: There is provided an electric cord and switch mechanism with receptacles for the insertion of electric plugs and a plug end for insertion into a wall outlet. The cord, receptacle and switch being adapted for attachment to the trunk of a Christmas tree or other member, where a tip switch, such as a mercury switch, is employed in the device to sense departure of the member to which the device is fixed from the normal position with respect to the ground, and interrupting power to the receptacle, thereby interrupting power to any electric device attached to the cord by means of the receptacle.

Abstract: A tilt switch includes an insulating housing with two first insert holes proximate to a bottom wall and aligned with each other and defining a first distance, and a second insert hole proximate to a top wall. Two first and one second electric contact members include first and second insert end portions press fitted within the first and second insert holes and extending into the housing, and first and second electric contact terminals extending outwardly of the housing. The second insert end portion is spaced apart from the first insert end portions with a second distance.

Abstract: The present invention is directed to electrical devices incorporating mesoscopically conductive liquids. The devices of the present invention include switches constructed such that in one configuration a charge carrying element, such as an electrode, is insulated from a charge receiving element by a thick (super-mesoscopic) layer of a mesoscopically conductive liquid; and in another configuration, the charge carrying elements are proximate each other and the charge is conducted between the elements by a thin (sub-mesoscopic) layer of a mesoscopically conductive liquid. Preferred embodiments of the switches of the present invention are suitable substitutes for switches, relays, or other switching interfaces.