An electromagnetic interrogation field in a theft detection system is made effectively more uniform by energizing different antenna windings lying in different planes at the same frequency but at different phases so that the resulting field pattern rotates in the vicinity of the antenna windings.

Use of pretensioned elongated reinforcing rods in concrete structures, the rods being terminated at various intermediate ends of the structure, and special anchor arrangements for permitting intermediate termination of the rods.

A high speed film reproduction device for reproducing an information image recorded on an original film onto a reproduction film, including a first original film drive assembly mounted ahead of an exposure assembly with respect to the travelling direction of the original film, a second original film drive assembly mounted subsequent to the exposure assembly with respect to the travelling direction of the original film, and drive control apparatus for selectively equalizing the driving forces of ...

A method and apparatus for continuously purifying a fluid by the emission of ultraviolet rays characterized by a body with a series of spaced, parallel, elongated, cylindrical radiation chambers extending therethrough, and a plurality of elongated, interconnecting chambers having a height substantially less than the diameter of the radiation chambers, a plurality of elongated, ultraviolet ray emitting lamps removably mounted in jackets in the radiation chambers, respectively, and extending from ...

Probe for measuring revolution speed of a body, such as the twist tube of a textile texturing machine, comprises a magnetically conductive sensor and induction coil wound around the sensor. The sensor is directed toward a point lying beside the body and particularly beside a particular configuration of same thus to suppress stray fields and field variations.

A compact electronic computer comprises a keyboard including digit and function keys, a switch opened and closed by said keys, and a circuit panel for directing electrical signals produced by the switch into the computer. Side plates are secured to the keyboard, the side plates having grooves for guiding and holding a printed circuit panel carrying thereon operation elements. A multijack is secured to the side plates, the multijack including, at least, a means for directing the electrical signal...

A liquid crystal display device is driven by alternating current applied thereto by a switching circuit comprising a group of MOS transistors. The transistors are switched in response to display signals applied to the respective gate electrodes by a control circuit such as the output circuitry of a computer.

Multi-layer fabric in which the layers are joined by threads extending therebetween to connect the layers while allowing same to be spaced a limited distance apart.

A tape cartridge containing therein a printing tape for use with a compact electronic computer. The tape may readily be set with respect to the computer body, and printing may be effected on the tape at an exposed portion of the cartridge by the printing device of the computer and information so printed on the tape may be viewed through a viewing window provided in the computer as the tape moves through a viewing section formed in the cartridge. The lock means is provided in the cartridge for co...

This invention relates to a process for squeezing and/or drying a humid thread, particularly a textile thread, in the course of a treatment, such as dyeing, effected continuously on said thread during the rectilinear displacement thereof, wherein the humid thread is passed into a zone traversed by a current of air at a pressure much lower than the pressure prevailing about the thread during the operation having provoked its humidification. The invention also relates to an apparatus for continuou...