A process for the preparation of 2,3-dimethylbutene-2 is disclosed, which comprises the steps of converting isovaleraldehyde to isopropylacrolein, hydrogenating alpha -isopropylacrolein to form 2,3-dimethylbutanol, dehydrating 2,3-dimethylbutanol to form an olefin mixture comprising 2,3-dimethylbutene-1 and 2,3-dimethylbutene-2, and isomerizing the 2,3-dimethylbutene-1 contained in the mixture in...

In order to prevent a cyclic repeating of switching of vehicle gears to higher speeds for automatic transmissions at increased running resistances, an electronic control system is provided with a prognostic circuit which predicts the acceleration which can be expected after switching to a higher speed and which allows the switching to higher speeds only if this acceleration is above zero. If an ad...

The active substance of the positive electrode of an accumulator cell consists of crystalline and polycrystalline lead superoxide in which the lead has its maximum valency of 4. The polycrystalline lead superoxide is an aggregation of individual crystalline substances which are in different growth and development phases. The active substance is located, as an adhering and permanent coating layer, ...

A delivery mechanism for a sheet fed printing press in which a rear edge guide in the form of a traverse member guides the rear edges of the downwardly settling sheets into a condition of register. A brake assembly is provided for engaging the trailing edges of the sheets to decelerate them, the assembly being horizontally adjustable to accommodate sheets of different length and the traverse membe...

PURPOSE:To enable to perform winding and unwinding without deformation of a projection part and to facilitate storage and transportation, by a method wherein, while a liner pulled out of a holding means is reeled in a spiral manner as the liner is engaged with a winding reel, a long size object is located between the liners for storage. CONSTITUTION:With a starting switch made, a driving force is ...

PURPOSE:To prevent the generation of a flaw and to execute cutting at a high speed by forming an amorphous silicon thin film on a flexible substrate, and subsequently, cutting it to an optional size by a laser beam. CONSTITUTION:An (a)-Si tape 1 which forms an amorphous silicon thin film on a plastic flexible substrate is wound to a roller 2. The end of the tape 1 is fed out and its initial end 4 ...

A continuous, completely jacketed countercurrent centrifugal extractor of the type utilized to mix and separate two liquids that have different specific gravities and enter through separate inlets. The extractor has at least one overflow weir in a mixing zone between the inlet for the specifically lighter and the inlet for the specifically heavier liquid phase and a division of the mixing zone int...

Apparatus for reducing waste material in which substantially parallel shafts carry cooperating material reducing cutters for either direction of rotation of the shafts. There are selectively positionable cages at the discharge with comb teeth in position to cooperate with the cutters in either direction of cutter rotation, and there is a control system for operating the cutters and cages such that...

An apparatus for the production of a synthetic resin skin uses a mold for forming at least two separate skin sections which are then joined prior or after a final heat treatment. The synthetic resin skin sections are produced in at least two separate mold members, and the skin sections are then caused to contact each other along determined faces or margins which are joined under light pressure. An...

A creel (10) comprises a frame (14) mounted in a C-shaped support structure to be pivotal about its vertical central axis (17). The frame (14) defines four spaces (22) on each of three levels. In each space (22) are pivotally mounted a pair of rigidly spaced package support arms (24, 25) which are together pivotable between two operative positions offset towards each side of the space (22) so that...

A non-return valve assembly particularly for an incontinence device, includes a least three layers, the layers being secured together, the first layer being a sheet or film of perforated material, and the second layer is a sheet or film of material having cuts therein defining an array of flap valves. The third layer is a material having holes therein, each hole being in registry with an associate...

Radiation source for generating ultraviolet or soft X-ray radiation within the vacuum-UV region, containing a gas, which is excited and ionised by electrons accelerated by means of microwaves. According to the invention, microwaves are supplied via a waveguide (40), which terminates in an aperture fitted (48) end piece, and that end is also fitted with two projections (42, 43) pointing at each oth...

PURPOSE:To obtain the device inscribed on the title having an improved productivity by a method wherein a filler being adhered fully automatically to the outer circumferential face of the blank bead, the blank bead and the filler are connected at the same time and the flipper is equipped. CONSTITUTION:The filler 2 is fed to the outer circumferential face of completed bead, i.e., the blank bead 1 f...

Polymers containing flame retardant amounts of addition products of alkylhalogen-free esters of (1a) phosphorus acids, (1b) carboxylic acids, or (1c) sulfonic acids and (2) a bicyclic phosphite (1-alkyl-4-phospha-3,5,8-trioxabicyclo-[2,2,2]-octane), said addition products having the following group; WHERE R is lower alkyl C1-C4), preferably C1-C2, an hydroxyalkyl (C1-C4), preferably C2-C3; the ad...

La fixation pour ski comprend une plaque d'arret antérieure fixée au ski, dont l'arret antérieur est attaqué par un élément tournant à gorge (14) fixé àla chaussure, une base rainurée en long et fixée à la semelle est prévue autour de la partie centrale entre l'élément tournant et le point de poussée du dispositif à ressort postérieur, et un tenon d'une pièce avec le ski est introduit dans sa rain...

PCT No. PCT/SE87/00266 Sec. 371 Date Apr. 22, 1991 Sec. 102(e) Date Apr. 22, 1991 PCT Filed May 29, 1987 PCT Pub. No. WO87/07348 PCT Pub. Date Dec. 3, 1987.A differential gear has a housing which is rotatably driven and which contains the shafts of differential planet wheels for rotation with the housing. The planet wheels are freely rotatable per se and are associated with meshing side wheels rot...