An improved device for generating an ultrasonic signal for use in an area protected by an alarm actuated by an ultrasonic signal. The device includes a tuned, acoustic rod within a cylinder typically about the size of a pen adapted to be worn in a shirt pocket. The device has a spring-actuated hammer which is movable, when triggered, into engagement with the rod to generate an acoustic signal. When the hammer is cocked, it is held in a cocked position by two spaced triggers which must be actuate...

An X-ray tube in which the electron beam is deflected over the X-ray emissive anti-cathode is provided with an anti-cathode, the surface on which the electrons impinge is corrugated in order to aid in the dissipation of heat.

A circuit for detecting ringing signals on a telephone line in which the alternating voltage oscillations are converted to direct current pulses which are used to charge a first capacitor. Only signals of 14 hertz or above are sufficient to repetitively charge the first capacitor to a high enough voltage to open continuously a grounding circuit through a comparator, thus, allowing a second capacitor to charge up and open a second grounding circuit thus permitting current to flow to a suitable ou...

A signal generating apparatus comprising a bistable magnetic device which alters its magnetic state when the density of magnetic flux to which it is subject passes through a predetermined value, and detecting means providing an output signal responsive to a change of magnetic state of the bistable device. A conducting means for magnetic flux subjects the bistable magnetic device to magnetic flux conducted therethrough and comprises a first portion providing a path of high permeability and a seco...

Method and apparatus for generating hydrogen and oxygen. Water is electroically decomposed in an electrolysis cell having a molten electrolyte which contains alkali ions and has a high OH.sup.- ion activity. The anode and cathode chambers are separated from one another by a separator made of an ion conducting aluminum oxide modification known as .beta.-Al.sub.2 O.sub.3. Hydrogen and oxygen are then separately withdrawn.

An ozone generating apparatus which comprises a plurality of chambers filled with an adsorbent, wherein a wet raw air is fed through one of the chambers filled with the adsorbent to adsorb moisture to form a dry air and the dry air is fed into an ozonizer to convert it into a dry ozone-containing air, and all or part of the dry ozone-containing air is fed into the other chamber filled with the adsorbent to purge water adsorbed on the adsorbent and to discharge it as a wet ozone containing air. T...

Two spaced electrodes having a load in an external circuit connected between them are disposed in an electrically conductive liquid, and energy is imparted to the liquid in such manner that energized free electrons in the liquid excite free electrons which flow into one electrode to a greater degree than in the other electrode, thereby causing electric current to flow in the external circuit through the load.

An elongated arm, pivotally mounted at the center to a support structure, includes a large, bulbous reservoir attached at either end thereof. The arm is hollow and a passageway therethrough joins the two reservoirs. A volatile fluid which vaporizes at a relatively low temperature (125.degree. F. or less) is placed within the reservoir/passageway to provide the activating fluid for the device. A source of heat input is provided in heat exchange relationship with each reservoir when pivoted to its...

A signal generator featuring, in one aspect, a clock, a programmable means for counting signals from the clock and providing outputs at predetermined counts, a delay means for providing a timing signal after a predetermined delay following each output, the delay means having a resolution higher than that of the clock, and a programmable means for repeatedly incrementing the delay for successive timing signals to provide a timing signal period not necessarily an integer multiple of the period of ...

An electrical power generating system is provided for supplementing an electrical power distribution network. The supplemental system of this invention is devised to utilize available sources of energy that are otherwise unused and converting that energy to power which is added to and utilized in the normal or primary electrical power distribution network. The system of this invention includes electrical generation means of a type that is adapted to be powered by a specific energy source and dev...