“DJINN” Universal Analog Computer — Sales Brochure (Laboratoires R. Derveaux)

This is an English translation of the original French-language brochure.

Page 1 — Front Cover

To all engineering design offices — All calculations, one single machine — the universal analog computer “DJINN”

Application fields listed:

Aviation · Automobile
Ballistics
Naval Construction
Electronics
Atomic Energy
Geology
Economic Sciences
Public Works

(Manufacturer logo: Laboratoires R. Derveaux)

Page 2 — Inner Spread

Analog computation is to the physicist… what the punched-card machine is to the accountant…

Simplicity · Ease of Handling

Produced in the form of a modular block unit, the “Djinn” can be put into service in any engineering office without major difficulties. It is entirely demountable, easily transported and installed without specialist intervention.

Its elements are interchangeable and their replacement involves only standard panel substitution performed by non-specialist personnel with no training required. In the same way, replacement of complete groups of standard panels is carried out by the user’s own teams without calling upon Laboratoires R. Derveaux.

All groups can be used individually or as sub-assemblies, giving the “Djinn” great versatility and enabling it to handle extremely varied and complex problems.

Clarity of Display

One of the great original features of the “Djinn” is its diagram board (plug board). This board permits the visual representation of interconnections between computing elements in a “block diagram” form, in which the computing elements (amplifiers, multipliers, etc.) are shown precisely as used, and the interconnections between them are drawn in, giving at a glance a complete representation of the problem being solved. In addition, around the diagram board, it is possible on the same panel to display one or more graphs of solutions simultaneously, and to check the physical system, or to prepare the study of a new problem while the machine solves another.

Low Operating Cost

With the complete equipment of a “Djinn,” problems can be set up and solved at a cost per hour far below that of competing calculation methods; the saving achieved by replacement of a team of engineers by the “Djinn” rapidly repays the cost of the machine.

Page 3 — Back Cover

Clarity of Display · Ease of Control · Accuracy of Results

(Shows a close-up photograph of the Djinn’s plug board with patch cables in place, illustrating a wired problem setup.)

Amplifier Characteristics

Open-loop gain: 500,000
Output power: 1 Watt (plus/minus 100 Volts into 10 kilohms)
Automatic zero return
Input-referred drift: less than 0.3 millivolts
Input valve grid current: less than 10 to the power -11 Amperes

Example of a Problem Solved (Simple Example)

The brochure shows a system of coupled differential equations illustrating the machine’s ability to solve problems typical of mechanical or aerospace dynamics.

Laboratoires R. Derveaux 6, Rue Jules Simon — Boulogne-sur-Seine Telephone: MOL 37-00