Abstract:
This invention relates to remote control cleaning apparatus, primarily for use in cleaning both the exterior and interior sides of windows of tall buildings. Hoisting apparatus is adapted to move along a track on the roof of the building and to raise or lower a cleaning unit to a selected window. Control means which may comprise a second or master cleaning unit is provided for manual operation inside the building and electromagnetically couples to the exterior unit. Manual movement of the interior unit causes the exterior unit to follow it, the exterior unit being rendered substantially weightless through suspension by springs. Controls of the positioning, application of the cleaner, and removal thereof are provided at the interior unit and are effective at the exterior unit by electromagnetic coupling through the window and/or by wireless through a switching station at the hoisting apparatus and down to the suspended unit over the suspending wires which comprise electrical leads.
Abstract:
THIS INVENTION RELATES TO APPARATUS FOR POSITIONING AND LOCKING A VEHICLE MIRROR AND ITS BACKING. A HOUSING PIVOTALLY SUPPORTS THE MIRROR, ITS BACKING AND CASE THEREFOR, AND INCLUDES A WALL SPACED FROM THE CASE. PIVOTAL MEANS IN THE FORM OF A PLURALITY OF ANGULAR LEG ELEMENTS PIVOTALLY SUPPORTED FROM A COMMON SUPPORT ARE DISPOSED BETWEEN THE WALL AND THE CASE FOR CHANGING THE POSITION OF THE MIRROR CASE REALTIVE TO THE WALL. RESILLIENT MEANS NORMALLY URGE THE CASE AGAINST THE PIVOTAL MEANS TO LOCK THE MIRROR IN SET VIEWING POSITION. ELECTROMAGNETIC COILS AND A BAR MAGNET LOCK THE MIRROR IN EITHER DAY OR NIGHT POSITION.
Abstract:
The invention resides in a modification of the vehicular electrical system to include a protected time delay circuit for maintaining the lights or the like on for a predetermined period after initiation, and a voltage-sampling interrupter for interrupting the electrical system when the battery voltage decays to a predetermined level if the lights or other load have been inadvertently left on or short-circuited.