A ceiling construction for demonstration equipment comprises a number of rectangular panels which between them define guide slots for a sliding link chain which will carry samples. The panels are supported by parallel rails which carry undercut longitudinal grooves on their lower sides for the receipt of clamping elements carried on the upper surfaces of the panels, the disposition of the grooves and clamping elements being such as to maintain a desired width along the length of the slots. Adjac...

An electronic equipment for connection, connected to a tape recorder, video equipment or the like electronic equipment for exchange of information signals with such electronic equipment has a connecting section introduced into a battery housing section of the latter electronic equipment. A plurality of connecting terminals are provided in the connecting section to reduce the size of the electronic equipment to protect the connection terminals.

The invention relates to a controlling equipment for properly maintaining a length of a period where an oscillator is to operate and also relates to a radio equipment incorporating such a controlling equipment. The oscillator is to supply a predetermined signal to a circuit that intermittently operates. A length of time, which is between a first instant and a second instant when the oscillator and the circuit are to initiate operation, respectively, is varied in accordance with a length of time ...

The manufacturing equipment is preferably in the form of sewing equipment comprised of a usual sewing head with a reciprocal up and down moving needle electrically driven for sewing a plurality of stitches in an article to be sewn. A presser foot retains the article in place during sewing and downwardly against usual feed dogs which move the article forwardly and rearwardly appropriate for the various stitching operations. A needle positioner is operable with the sewing with the sewing head for ...

Gramophone equipment incorporating photoelectric scanning to detect bands between record tracks; an electronic counter to count the detected bands; a selector for making track selections; an electronic memory for storing selections; control circuitry for comparing the contents of the counter and memory to control a tone arm of the equipment to play selected tracks and lift from a record at the end of a selection; and a tone arm drive comprising means for lifting and lowering the arm and means fo...

Mine equipment for measuring conveyor advance includes two roof support assemblies and control means to ensure each of the assemblies can be advanced only when the other assembly is anchored. The two assemblies are linked by a transducer which senses movement of one of the assemblies relative to the other assembly.

An assembly for supplying a nutrient solution, such as water, to plants supported on a greenhouse bench, which retains the solution supplied thereto from a reservoir disposed immediately beneath the bench. A main source of liquid, such as water, is supplied through a main valve to a float-operated valve within the reservoir for maintaining a predetermined level of the solution within the reservoir. Also included is a fluid line interconnecting the bench and a pump disposed within the reservoir w...

Herein described is a bowling ball and bowling ball equipment carrier which includes an upper compartment for holding the equipment and a lower compartment for carrying a pair of bowling balls. A front opening door is provided for access to the lower compartment and a top opening door is provided for access to an upper compartment. A strap is provided in both the lower compartments which is placed under the bowling ball and extends into the upper compartment so that as the selected strap is pull...

A trailer and a demountable container for transporting loose products or refuse is disclosed herein. The container has an internal ejector slidable over its entire length for ejecting the contents therein. The trailer has mounted on its bed a centering relief longitudinally positioning the container, a pin engaging an aperture in the front of the container holds the container in a lateral position, and a hydraulic ram for moving the internal ejector from the front of the container to the rear. A...

An elongated frame provides a track over a mining machine for a carriage which is hauled along by an endless chain. The carriage carries assembled crown roof support sections to adjacent the newly exposed rock boundary.