A miniature electrically powered surface sweeper having a rotary brush element which is adapted to come in direct contact with a surface to be cleaned. The brush element is disposed within a housing having a curved inner wall surface which contacts the bristles as the same move inwardly within the housing to prevent loss of dust particles. A receptacle element is provided with a movable trap opened by the moving of an electrical switch to closed position to power the brush element, and closed wh...

A surface potentiometer comprises a measuring electrode, a chopper for intermittently shielding the electric field between the measuring electrode and an object to be measured, a preamplifier circuit for converting an AC signal induced in the measuring electrode into a low impedance signal, and a printed substrate having the wiring pattern of the preamplifier circuit formed on one surface thereof and the electrode pattern of the measuring electrode formed on the other surface thereof.

A surface winder for a web of sheet material which performs transfer of winding operation from a winding device to another winding device without stopping of the operation or slowing down of the speed of operation. The surface winder comprises plural winding devices, web guide means, a cutting device, web feeding means and means for forming an adhesive layer on the surface of a web. The web guide means are capable of delivering a leading end portion of the web at the winding devices, and the fee...

A surface box for covering over and guarding the operating rod of a gate or other valve in underground piping has a tube-like supporting frame and a rod guard sleeve mounted therein so that it may be moved upwards and downwards in translation for adjustment, for which purpose it is supported by a thrust screw on the supporting frame. To keep the sleeve from being tilted sideways and the operating rod of the valve damaged, the rod guard sleeve is keyed in the supporting frame and is guided by at ...

A surface potentiometer having a movable shield member for intermittently shielding a clearance between a measurement electrode and a surface to be measured to cause a potential of the surface to be measured to be induced as an AC signal in the measurement electrode. A voltage greater than or equal to a maximum value of the potential of the surface to be measured or a voltage smaller than or equal to a minimum value of the surface potential is applied as a bias voltage to the shield member to th...

A surface tracer having a probe to trace the surface profile of a work continuously and read out the shapes of the work to three-dimensional coordinate electrical signals. The probe is rigidly connected with an X-axis slider which is supported on a base through Y- and Z-axis sliders so as to be slidable perpendicular to each other such that the probe can be slided on the surface of the work. The Z-axis slider is suspended from the base by a suspending spring to support the other X- and Y-axis sl...

A surface sander having a housing with a handle and a motor with a motor shaft arranged in a bearing of a sanding foot which is connected through a flexible body with the housing, is disclosed. A dust hood encloses the motor, the housing, the flexible body and the sanding foot. Two parts of the hood are mutually lockable, and the flexible body has an upper annular rim which can be clamped between a bottom rim of the motor housing and the dust hood parts. A lower annular rim is fastened to the sa...

A mixture for forming a coating on a surface includes a metal alkoxide having the chemical formula Si(OR.sup.1).sub.4, OR.sup.1 being a hydrolysable group, an organoalkoxysilane having the chemical formula R.sup.2.sub.xSiOR.sup.1.sub.(4-x), R.sup.2 being an epoxy group and x being an integer from 0 to 3 , a silica filler, and an organic acid for promoting hydrolysis and cross-linking the metal alkoxide and the organoaloxysilane. A coating on the surface is formed by depositing the mixture on the...

Treatment of metals, and other surfaces, with dilute colloidal slightly acidic dispersion of silica and tannin. The treating composition is removed from the metal surface before forming any deposit of silica visible to the naked eye. The metals become resistant to chemical attack.

A method for producing, and a product having, a surface nanopattern, wherein the method comprises the steps of: obtaining a substrate with a smooth surface; acquiring a self-assembling monolayer precursor, wherein the precursor includes an inducible, usually photocatalytically, active region and a substrate attachment region; mixing a plurality of the self-assembling monolayer precursors with the substrate to produce a self-assembled monolayer having an exposed surface comprising the inducible a...