A trigger assembly for a power fastener driving tool having a housing, a control valve mounted to the housing and a reciprocating workpiece contacting element associated with the housing, includes a trigger member being pivotally engaged on the housing and having a pair of spaced walls, an actuation lever having a free end and a pivot end pivotally engaged on at least one of the walls, the free end being constructed and arranged for engaging the workpiece contacting element, and a biasing elemen...

A selectable cartridge is provided consisting of a cartridge head, a dual-bed propellant chamber, a primer, and a tube. The invention enables the user to select a launch velocity prior to chambering the round. A high-velocity projectile is launched by mechanically rotating the base cap and rotation band such that holes along the primer align with the larger of two propellant beds. A low-velocity projectile is launched by rotating the base cap and rotating band a quarter turn from the high-veloci...

A modular electrical receptacle including a housing, a plurality of semi-rigid electrical conductors disposed at least partially within the housing including a first semi-rigid conductor and a second semi-rigid conductor and at least one flexible electrical conductor including a first flexible conductor electrically connecting the first semi-rigid conductor and the second semi-rigid conductor.

The specification describes a gear transmission especially for automotive use having a larger number of gear ratios than usual provided in a smaller housing in such manner that the gears are not physically moved but wherein the drive shaft embodies a selector adapted to provide a drive connection between the drive shaft and a selected drive gear. Especially however the transmission of the invention provides for an automatic shift in gear ratio responsive to engine speed and load.

An adjustable hitch comprising a channeled bracket adapted to be connected to a towing vehicle. A multi-sided hitching member containing a hitch on each side is adapted to slide within said channeled bracket. A wedge interposed between the multi-sided hitching member and the channeled bracket forces a pair of keys located on the hitching member to nest within the corresponding keyways located upon the channeled bracket thereby effectively locking the hitching member to the channeled bracket. Rem...

A bung screw-threadedly received in a receptacle has a plurality of flow openings therethrough disposed in a series about the axis of the bung, and an axially movable valve disc for simultaneously opening or closing all of the openings. Each opening has a thin penetrable closure which can be penetrated without disturbing any of the other closures. In this way, when the container is tilted to discharge the contents, only the closure of the flow opening which is lowermost need be broken. The disc ...

A support which enables a roller or axle to assume either an operative or a storage position. The operative position allows the roller or axle to be rotated to result in the winding up of a flexible, sheet material attached to the roller. Once the sheet material is wound onto the roller to the extent desired, the roller is physically moved to the storage position. The storage position renders the roller immobile thus securing the sheet material from unwinding.

This is a system which provides a train of output pulses that duplicate a train of input pulses but which output pulses are delayed a selective amount in time. A first counter receives a digital word which represents the amount of time that the output is to be delayed after the input. A clock supplies the counter with timed pulses, and when the capacity of the counter has been reached, its output initiates the output pulse. A second counter counts upwardly during the period of time that an input...

A dishwasher having an improved water circulation arrangement for use therewith including a fluid circulating pump variously connectable with a lower rotating spray arm, a vertical spray column on the spray arm and an upper spray header. The spray header is positioned on the spray column such that the spray header receives fluid by means of a vertical supply stub extending concentrically within the spray column providing fluid communication between the pump and the spray header. A three-position...

A method and apparatus for obtaining a variety of selectable bobbin thread tensions in a lockstitch sewing machine wherein bobbin thread tension is achieved by resisting bobbin rotation by pressing a bobbin hold down arm against an annular protuberance on a flange of the bobbin and concentric with the center of rotation of the bobbin, replacing the bobbin with one similarly constructed but having its protuberance at a suitable different radius when a change in bobbin tension is required.