A method for synthesizing enantiomerically enriched chemical intermediates with predetermined chirality is described. The method comprises formation of a pseudoephedrine amide, followed by stereoselective alkylation at the alpha carbon. The chiral auxiliary can then be cleaved off, affording chiral end products useful for further transformations. The enantiomeric enrichment of the chiral end products may exceed 98%, and the chiral auxiliary can be recovered. Novel amides of pseudoephedrine used ...

A predetermined torque release wrench comprises a tubular handle member, a torque transmitting arm pivotally connected to the front end of the handle member and a leaf spring having an arcuate shape in cross section. The leaf spring is so arranged that its concave surface is in faced relationship with the free end of the arm. One of the ends of leaf spring is fixed on a support block positioned in the rear portion of the handle member and the other end is engaged by the free end of the arm.

A predetermined torque release wrench which may be used to apply a torque to a fastener. The wrench includes an arm connected to the ratchet head of the wrench with a variable spring set cam lever arrangement. The cam lever is pivoted in the wrench case. The arm overcomes the resistance of the cam lever when a predetermined torque is reached.

Individual hands for a card game are predetermined and dealt to a player in a unitized form. Each hand has a base card or strip to which are attached removable tabs of a uniform number for each hand. Each tab bears individual indicia corresponding to the standard card suits and the denominations in that suit. The tabs are singularly removed and played in sequence as are normal cards. If desired, additional indicia may be used to ascertain the order of the removal of each tab from the base card.

The invention provides a process wherein a mixture prepared from starting materials comprised of P.sub.2 S.sub.5 of high reactivity and low reactivity, respectively, is converted to phosphorus pentasulfide of predetermined reactivity lying between that of the high reactivity P.sub.2 S.sub.5 and that of the low reactivity P.sub.2 S.sub.5 starting materials. To this end, the starting materials are mixed in quantitative proportions which are selected in accordance with the respective reactivity of ...

A lawn sprinkler system has a plurality of sprinkler heads connected to a common water supply line. The sprinkling or irrigation, the rate of rotation and the contour of the area sprinkled all are controlled at each sprinkler head. A timer valve associated with a manually adjustable control setting regulates the sprinkling cycle at each head in response to rotation of the head, following which water is bypassed to the next sprinkler head in succession. Further, each sprinkler head contains a rot...

Uniformly shaped pieces of gasified candy containing gas bubbles having a diameter below 150 microns produce a prolonged sizzling sensation when permitted to dissolve in the mouth. This confection is prepared by injection molding or deposit molding quantities of a gasified sugary melt under superatmospheric pressure.

This invention concerns a machine for making a textile product comprising a needle carrier shaft, reciprocation means for reciprocating said shaft, yarn feeding means for feeding yarn to a needle carried by said shaft, and control means for ensuring that the needle carrier shaft can be stopped only at an end of its reciprocation.

Moving a target mobile node to arrange a number of mobile nodes includes determining a first direction. A first relative position for each of the neighboring mobile nodes of the target mobile node is established. The target mobile node moves according to a first alignment procedure to align the mobile nodes in the first direction. A second direction substantially orthogonal to the first direction is determined. A second relative position for each of the neighboring mobile nodes is established. T...

The distortion component of an oscillation signal is reduced. An oscillation signal generating circuit generates, as oscillation signals, first generation oscillation signal and second generation oscillation signal which are related to each other as a differential signal. A differential amplifier performs differential amplification on the first generation oscillation signal and the second generation oscillation signal, respectively, and outputs first amplification oscillation signal and second a...