A high pressure mixing head is disclosed for combining a plurality of reactive fluid polymeric components to form a mixture thereof for molding purposes. The mixing head incorporates an expulsion piston operating in a mixing chamber into which the several components are individually admitted through separate inlet openings which are covered and uncovered by reciprocation of the expulsion piston. This piston is actuated by connection to a power piston operating in a power cylinder, and means such...

An extrusion head and a method for controlling the concentricity of extruded tubular products. A die member has a generally spool shaped configuration with front and rear flanges connected by a hub. The die member has a bore extending completely through it in the hub area. A mandrel is inserted and held in the bore to define an annular space. The rear flange is rigidly connected to a source of molten material to be extruded. The material is introduced into the annular space and issues from the d...

The invention of this disclosure is a viewing head that packages a spherical mirror, beamsplitter, and cathode ray tube (CRT) in an enclosed container. The process of assembling the viewing head will automatically maintain the spherical mirror, beamsplitter, and CRT in optical alignment, making a time-consuming alignment procedure unnecessary. Because the optical equipment is contained within an enclosed container, the optical equipment will not have to be cleaned as often.

An improved sprinkler head for use in fire retarding systems including means for confirming the presence of water pressure at the sprinkler head. The confirming means includes a valve means provided in the sprinkler head and coupled to the water input of the sprinkler head and a pressure detection port provided in the sprinkler head coupled to the water input of the sprinkler head via the valve means whereby a pressure gauge may be connected to the port and the valve means opened so that the wat...

The inside of a head gear adapted to be movably mounted on a substantially spherical doll head having a projection extending upwardly from the head is provided with a groove defined by a pair of ribs inside the cap. The top projection of the head is guided in the groove so as to enable the cap to be tilted relatively to the head between two extreme positions.

A head chip and a head unit, in which manufacturing cost is reduced and also manufacturing steps are simplified, are provided. In a head chip 10 in which: partition walls 12 made of piezoelectric ceramic are arranged on two upper and lower sheets of a first board 11 and a second board 16 with predetermined intervals; chambers 13 are defined between the respective partition walls 12; a driver voltage is applied to electrodes 14 provided on the side surfaces of the partition walls 12 to change the...

A magnetic head comprises a magnetic record/playback limb disposed in opposing relationship with the surface of a magnetic record medium, and a flux conducting limb coupled with the record/playback limb and adapted to be disposed in opposing relationship with a lateral end face of the medium.

A guide member for print needles and a base plate with guide apertures traversed by the rear end of the needles are bolted to a magnetic core element, having annularly arranged poles; a cover is also bolted thereto, sandwiching a case in between. The cover centers an annular element having radial spring arms which hold one end each of a plurality of armatures respectively against the annularly arranged poles. The spring arm ends and the armature ends have interlinked, raised edges for obtaining ...

A sprinkler head has a pop-up riser having a nozzle at the upper end thereof for directing a desired flow of fluid therefrom; said riser contains a turbine drive device for rotating said nozzle in response to fluid passing through said sprinkler head; said nozzle having a sealing surface with a part of said sprinkler head; said nozzle being biased against said part so that fluid passing through said nozzle decreases the force biasing said nozzle against said non-rotating part. A modification of ...

A shower head having an upper body adapted for attachment to a water supply pipe, and a lower body swivably supported on the lower end of the upper body, which bodies conjointly define a water passageway therethrough. The lower body has an internal cavity formed therein upstream of the discharge orifice, which internal cavity includes a substantially cylindrical chamber coaxially aligned with and spaced upstream from the discharge orifice. The cavity further includes a frusto-conical chamber whi...