history

Advancement Devices, Inc. is a result of the merger of two corporations, Advancement Devices, Inc. and Cold Cathode Corporation. Advancement Devices, Inc. was formed in August, 1960 by 11 engineers of long and diversified experience with the primary goal to introduce new approaches in the technology of electro-mechanical systems and compo nents. Subsequently, ADI merged with Cold Cathode Corporation, a corporation in existence since 1917, manufacturers of Cold Cathode interference free fluorescent lamps, and specialists in the design of Cold Cathode fluorescent lighting systems. Recently, the two corporations consolidated their facilities in a new plant as Advancement Devices, Inc. 86 Denton Avenue, New Hyde Park, Long Island, New York.

FOURTH STREET

advancement devices inc.

A GROWING CONCERN WITH GREAT CAPABILITIES

goal

It is the primary goal of Advancement Devices to attack difficult problems now associated with vital components in electrical and mechanical devices by the application of novel approaches. Since the birth of the new company, several fields of endeavor have been selected, and intensive work is being done in each instance to generate items which will constitute advancement in the art. The program is scientifically planned for maximum efficiency, without compromise for quality. Special attention is also given to the efficient production and reliability of the interference free Cold Cathode fluorescent lamp and associated components, such as transformers and dimmers.

Geo

правдов

Through efficient

team-work complex projects are carried out to successful

completion

a a I

LEVANCEMENT DEVICES INC.

The Electronics Department and Laboratory

The Electronics Department has set up adequate Laboratory facilities now employed for electrical, electronic, solid state and microwave work. Through efficient team-work complex projects are carried out to successful completion.

Electronics

A considerable amount of development in electronics is now in process. The Electronics Department has just completed the prototype of a magnetic amplifier to be employed as a constant current supply of the new fire alarm system of the New York Fire Department.

Several other electronic devices are in the process of development. For example, an integral calculus electromechanical computer which can integrate the product of any number of functions over any definite interval. A new high accuracy toroidal potentiometer which offers over 100 inches of mandrel and, therefore, long and accurate resistive element, with only a 4.5" overall diameter.

Another program now in progress in the Electronics Laboratory is the development of a prototype of an extremely narrow band television system.

Electrical:

Tests are made to correlate ionization potential and voltage current characteristics vs. pressure and proportions of ingredients of the internal atmosphere of the interference free cold cathode fluorescent lamps. The results will be applied to put in effect a rigid quality control during production of this item. A thorough study is made of the light qualities and noise of the different dimming devices, such as thyratron, saturable reactor driven silicon controlled rectifiers, and simple mechanical dimmers employing motorized auto-transformers. The study is necessary to determine the R. F. noise content in each different dimming device, and other such effects, as stroboscopic effect and flicker at different levels of dimming.

Another study under progress of measurements of both unpolarized and polarized panels employed in fluorescent fixtures. The panel acts as a filter or a polarizer and, therefore, is an important component of lighting installations.

Accurate Rf noise

data of Cold Cathode
lamps and dimming
devices is compiled
by use of modera
equipment

C.

Solid State Investigations:

A.D.I. Electronics has just completed a research contract, originating from the Weapons Guidance Lab of Wright Field, Dayton, Ohio, on a microwave infrared detector employing intrinsic germanium as a photoconductor. The intrinsic germanium, only c" cube, is placed in a sharply tuned X-band microwave cavity. The variations in conductivity resulting from the incidence of the I. R. radiation is detected by the RMS shift in the standing wave in the waveguide. An ideal signal amplification of is contributed by the microwave cavity. N.E.P. values of 1.2x10 watts per cycle bandwidth were achieved.

The solid state lab is now initiating an internal program for the study of luminescent panels and phosphors.

Bench set up for microwave infrared detector investigations