Abstract: A method of construction of prefabricated plastered panels for housing, which comprises the steps of installing a rigid framework comprising a plurality of spaced apart studs onto a horizontal surface, filling up the spaces between the studs with a granular material such as sand, stretching and fixing a reinforcing material such as wire mesh, onto the upper surface of the framework, applying a layer of plastering material such as a plaster, stucco or cement onto the reinforcing material, using the granular material as formwork to support the plastering material until it is dry; and removing the framework with the dry plaster layer attached thereto from the horizontal surface. This method is particularly interesting in that it does not request any equipment for the construction of the prefabricated plastered panels. Moreover it does not request skilled labor and it makes use of low cost materials only.

Abstract: A sewing machine having a power-driven needle has an endless feed belt for moving workpieces beneath the needle. The belt stops and advances, and there is provision for measuring the movement of the belt upon each advance of the belt. In response to this measurement, the belt is stopped, thereby to ensure that the belt moves only a predetermined distance beneath the needle each time the belt advances. To advance the belt, there is a friction roll in contact with the belt, a back-up roller on the opposite side of the belt from the friction roll, and structure selectively to apply the back-up roll forcibly against the belt and to move the back-up roll away from the belt, thereby respectively to drive the belt and to interrupt the drive to the belt.

Abstract: Yarn break in a short seam sewing machine is determined by detection of yarn swinging and wherein the sewing machine is stopped in response to the detection.

Abstract: New esters of cephalosporins of the formula ##EQU1## wherein R.sup.1 is a substituted or unsubstituted alkyl, cycloalkyl, aryl or heterocyclic group, R.sup.2 is S--R.sup.4 wherein R.sup.4 is a methyl, ethyl, benzyl or heterocyclic group, a xanthate, dithiocarbamate, thiouronium, azido, alkoxy, hydrogen, substituted or unsubstituted alkanoyloxy, carbonyloxy or 1-pyridinium group, R.sup.3 is ##EQU2## wherein R.sup.5 is hydrogen, methyl or ethyl, X.sup.2 is O or NH, R.sup.6 is a basic group, R.sup.7 is a substituted or unsubstituted alkyl, cycloalkyl, aryl, aralkyl or heterocyclic group, X.sup.1 is O or S, Y.sup.1 is hydrogen, a hydroxy, alkyloxycarbonyl, halogen, azido, a substituted or unsubstituted amino group, a carboxyl group, the group --COOR.sup.3, or a nitrite group, n is 0 or 1 and m is 0 or 1, useful as active ingredients of pharmaceutical preparations; processes for their preparation; and methods for the treatment of infectious diseases.

Abstract: Penicillin esters of the formula ##EQU1## wherein R.sup.1 is alkyl containing from one to eight carbon atoms, phenyl, thienyl, furyl, or phenyl substituted with one or more members of the group consisting of halogen, hydroxy, and amino, R.sup.2 is selected from the group consisting of --SO.sub.3 H, tetrazolyl, --NHSO.sub.2 R.sup.4, ##EQU2## and AND WHEREIN R.sup.3 is selected from the group consisting of ##EQU3## The radicals R.sup.4 -R.sup.10, X.sup.1 and X.sub.2 are defined in the specification. The esters are well resorbed at oral administration.