A door stopping device is disclosed. It includes a fitting seat secured on a lower section of the door near the floor and a door stopper. The door stopper includes a base seat formed with a receptacle section for receiving a magnet and a pivot section, a supporting rod having a pivot end and an outer end, a pivot shaft pivotally connecting the pivot end of the supporting rod with the base seat, and a slipproof pad disposed on the outer end of the supporting rod. When the slipproof pad is located...

A short steel pipe for use as a crack stopper is described having externally or internally helically arranged individual notches, perforations or texture changes at such a number that they overlap in axial direction, and an axial line on or in the pipe will traverse at least one of these notches, perforations or texture changes.

A process for sealing geological formations and mine stoppings by applying to these substrates an aqueous, non-cementitious caulk composition comprising an alkali metal silicate; filler material including at least one silica product or silicate other than an alkali metal silicate; a water-soluble or water-dispersible polymer modifier; and water, and allowing the caulk composition to dry to form an air flow resistant seal on the substrates. A highly satisfactory polymeric modifier is used in the ...

A jack for installing in a mine a plurality of elongate extensible panels adapted to extend vertically in side-by-side relation from the floor to the roof of a passageway in a mine. Each panel comprises a first elongate member consituting a lower member of the panel and a second elongate member constituting an upper member of the panel, each member having a web and flanges at opposite sides of the web, one of the members having a telescoping sliding fit in the other. The upper member of each pan...

An engine starting device includes a first pulley mounted to the crankshaft of an engine for rotation with the crankshaft. A second pulley is mounted to an arbor that extends into a spring housing containing an elastic member. The elastic member is interconnected with the arbor such that rotation of the arbor in a loading direction loads the elastic member. A belt interconnects the two pulleys and a tensioner is mounted near the belt to selectively apply tension to the belt. When the tensioner a...

A low-cost solenoid is provided for stopping an engine, which reduces the possibility of the occurrence of damage, generates little noise due to impact and is of a simple structure. The solenoid includes a suction coil and a holding coil both located within a solenoid body. Current to the suction coil is shut off by means of the movement of a plunger. The solenoid further includes an end wall provided at one end of the solenoid body, a pin which slidably extends through the end wall, a fixed con...

An automatic vehicle-stopping structure according to which a vehicle body carries at an outermost part, which leads the remainder of the vehicle body when the latter travels in a given direction, a container which contains a fluid and which has most distant from the outermost part of the vehicle body a flexible wall to be engaged and deformed by a person or object which comes into contact with the fluid-container during travel of the vehicle. The interior of the container communicates with a pre...

A ribbed sheet of flowable material is positionable on the sides and roof of an air passage of a mine for sealing irregularities in the sides and roof and extends across the air passage to prevent the flow of air therealong. A plurality of air cells are positioned in closely adjacent relation within the confines of the sheet and are inflatable to block the flow of air through the passage.

The circuit for controlling the stopping of equipment comprises a switch with two contacts and with a pushbutton able to bring about the switching of the contacts into an open position and a closed position. The circuit comprises a supplementary member which functions like the pushbutton and is controlled by a relay in series with one of the contacts of the switch, this relay being responsive to a remote control device.

A caster is provided with a lock clip, which, when operable, joins the caster and a caster holder to prevent oscillatory movement therebetween. A first axle joins the caster body and the caster holder, the axle including a base frame at the bottom thereof which is receivable within the caster body. A rubber damper between the caster body and the base frame provides a shock absorbing effect between these two elements.