A poromeric sheet material is provided with deporomerized areas selectively disposed at points where better mechanical strength is desired and where in addition better hydrostatic resistance is desired. Better mechanical strength means better abrasion resistance, better puncture resistance, better flex life. Better hydrostatic resistance means resistance to wetting-through, resistance to bibulousness, resistance to the passage of water-borne soiling agents. The deporomerized areas of the poromer...

An interface or connector for providing distribution of telephone feeder cable pairs includes first, second and third fields of connectors. The connectors in the first field can be interconnected with any connector in the third field or with an associated connector in the second field but not with both simultaneously. The connectors in the first, second and third fields are respectively connected to feeder-in cable pairs, feeder-out cable pairs and distribution pairs. Accordingly, a pair in the ...

Limited surfaces areas are galvanized by depositing a metal or metal alloy from an electrolytic solution which is applied in a jet stream so as to make contact with said surface at a predetermined spot and follow the outline of the surface up to a second predetermined spot where it is detached from the surface by suction action.

An improved book cover structure of the general type having an integral backbone and front and back covers connected to the backbone via spaced parallel score lines to enable the front and back covers to flex relative to the backbone. A backbone strip of hot melt adhesive is secured on an inside face area of the backbone. Spacer means for positioning the outermost sheets in engagement with the backbone strip are provided and comprise cover strips of hot melt adhesive secured to inside surface ar...

A device for draining sandy ground areas, such as tennis-courts, includes an air pump, water separating elements and a suction device. A suction pipe connects the pump to the water separating elements and the water separating means to the suction device. In order to prevent sand from being removed from the ground during the draining process, the suction device has a relatively large inlet is covered by an open-pore, elastic foam plastics material.

An optical scanner for use in a confined or restricted location having a movable prism assembly which utilizes cylindrical or spherical mating joints between a pair of flat input/output surfaces. The mating surfaces are spaced less than one wavelength apart, preferably by an air bearing. The cylindrical members can be used for line scanning while spherical members provide two degrees of freedom of movement. Optical refraction through this movable prism assembly provides a small "exit pupil" scan...

A technique for identifying and measuring a first surface area and apparatus for aiding such identification are disclosed. Each incremental portion of said first surface area and at least adjacent portions of surrounding surface areas are illuminated with diffuse light incident through a predetermined sectorial angle related to an anticipated waviness of the surface areas. The first surface area so illuminated is then measured by opto-electronic measuring techniques whereby measuring errors caus...

Multiple processes in an interrupt driven system are efficiently executed because each process has its own independently identified and addressable stack storage area including a process control block. Each process control block includes a link field for forming a distributed list of processes in dispatching priority order.

A locator system is disclosed wherein the vehicle whose location is unknown transmits a short, modulated radio frequency pulse. Receiving stations about the periphery of the area being serviced phase compare the received signal with a standard time reference signal. The phase difference is used to determine the arrival time differences at the known locations of the receiving stations from which the location of the vehicle may be determined. The wavelength of the modulating signal is generally gr...

The specification discloses a device for lubricating areas of rotating parts in which a pump structure is carried by the rotating part. A stationary part surrounds the rotating part and forms a lubricating chamber connected to the pump. An actuating ring carried by the stationary part is operable for actuating the piston means of the pump structure. Conduit means lead from the pump structure to the area to be lubricated.