A metal sheave is turned on a lathe to remove worn flange and groove portions to provide three roughened cylindrical surfaces of progressively greater diameter about which a peripheral rim body of polyurethane is cast in an encircling mold and permitted to cure; the sheave is then turned on a lathe to shape the polyurethane to provide peripheral flanges and a groove therebetween.

Radiation curable coating compositions for providing solvent-resistant abhesive coatings comprise polyfluorinated acrylates and methacrylates, polyethylenically unsaturated crosslinking agents and a film-forming organic polymer. The compositions can be used after radiation curing to render substrates oil, soil, and water repellent. The cured compositions have particular use as release coatings in image transfer systems wherein a fused xerographic image is transferred from the release coated surf...

A system for providing auxiliary power comprises a primary circuit including a primary pump, an output line for providing primary power, and a return line. An auxiliary circuit includes an auxiliary pump, an output line for providing the auxiliary power and a return line. The auxiliary circuit also includes a valve for controlling fluid flow in the output and return line of the auxiliary circuit. A reservoir is connected to the primary return line and to the auxiliary return line. A controlled l...

The invention comprises a method of providing a digital signature for purposes of authentication of a message, which utilizes an authentication tree function of a one-way function of a secret number.

A portland-cement stabilized soil base for a roadway is covered with an elastic rubber-asphalt layer and thereafter with a surfacing layer. The elastic layer may be formed by reacting 1 to 30% by weight of asphalt with 99-70% by weight of rubber and be applied hot as by spraying; and the surfacing layer will ordinarily be asphalt concrete composed of asphalt binding aggregate particle such as coarse stone, together. Preferably the elastic layer covered with a layer to prevent bonding of the elas...

The invention concerns a device for providing a friction joint. It comprises an inner (1,11) and an outer (2,9) element, the inner element having a tapered outer surface co-operating with a complementary tapered inner surface in a bore in the outer element. Means (6,7,8,12) are provided for displacing the elements axially parallel to the taper axes. One element preferably consists of a slitted clamping sleeve, and for diminishing the friction in the tapered contact and simplifying manufacturing ...

First to third switch contact pairs are provided for each of the performance keys of an electronic keyboard musical instrument such that they are successively closed in an interlocked relation to the operation of the associated key. A first time interval from the closure of the first switch contact pair till the closure of the second switch contact pair and a second time interval from the closure of the second switch contact pair till the closure of the third switch contact pair are counted in a...

This invention relates to a process for preparing an oxidized penam derivative of the formula: ##STR1## wherein R.sub.1 represents an amino or protected amino radical, and R.sub.3 represents a radical selected from the group consisting of carboxy, protected carboxy, ester, acid amide, acid anhydride, acid halide, acid azide and carboxy salt, wherein a penam derivative of the formula: ##STR2## is oxidized with an oxidizing agent selected from the group consisting of hydrogen peroxide, peracids, h...

Polymers reactive towards free amino groups, such as polyamides, polyureas, polyurethanes or polyesters, are provided with durable modified properties by being brought into contact with an additive polymeric material which (a) is compatible with the polymer being treated, (b) contains a plurality of oxyalkylene groups effective to impart to the modified polymer improved properties such as reduced static propensity, modified dyeability, or greater water absorbency; and (c) has one or more reactiv...

A method is disclosed for making a package comprising a shrinking film surrounding a number of articles arranged in a package pattern and presenting on its top surface, which surface comprises at least two layers of said film to reinforce said surface, a carrying handle made wholly or partly from the package material proper, said handle being delimited by two cuts formed in the lengthwise direction in said reinforced top surface of said package, said handle being thus integral with the rest of t...