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Nov 1930

Volume 1, Issue 11, pp. 615-704


A DOUBLE‐RANGE ELECTROSTATIC VOLTMETER FOR 200 KILOVOLTS

Harry Clark

Rev. Sci. Instrum. 1, 615 (1930); http://dx.doi.org/10.1063/1.1748648 (6 pages) | Cited 1 time

Online Publication Date: 17 December 2004

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The electrostatic voltmeter described in this paper consists, from an electrical standpoint, of two meters which may be used in series or in parallel. Mechanically, however, it is essentially a single meter, since it contains only one moving part. With the parallel connection voltages between 15 and 100 kv may be measured to within .1 of 1%. With the series connection and voltages between 100 and 200 kv (one‐half on either side of ground, the halves fairly well balanced) the error need not exceed .1 of 1%.

A METHOD OF WINDING REGENERATOR COILS

J. R. Roebuck

Rev. Sci. Instrum. 1, 621 (1930); http://dx.doi.org/10.1063/1.1748649 (9 pages)

Online Publication Date: 17 December 2004

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Abstract Unavailable

RADIATION THERMOPILE DESIGN

F. A. Firestone

Rev. Sci. Instrum. 1, 630 (1930); http://dx.doi.org/10.1063/1.1748650 (20 pages) | Cited 15 times

Online Publication Date: 17 December 2004

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Previous formulas for the design of radiation thermopiles to be used with a Thomson galvanometer are summarized and new formulas for the design of thermopiles for use with D'Arsonval galvanometers are developed.
A design of thermopile is described in which the cold junctions almost entirely surround the hot junctions thus reducing drifts. In this design, each element is constructed as a separate unit and when all are completed they are simply stacked up and fastened together with one screw, thereby minimizing the danger of breakage. The whole thermopile fits into a cubical evacuated case only 10 mm on an edge and, being so small, it can be used directly in front of an elliptical mirror which forms a small hot image, in some cases increasing the deflection due to a given radiation by a factor of 3. By a slight modification of the spectrometer, a thermopile having adjustable compensation can be utilized which, theoretically, will give almost no drifts due to changes in temperature of the optical parts of the spectrometer or of the surroundings.
A convenient technique of construction is described.

A RAMAN EFFECT APPARATUS USING STANDARD TUBULAR LAMPS

L. J. Buttolph

Rev. Sci. Instrum. 1, 650 (1930); http://dx.doi.org/10.1063/1.1748651 (4 pages) | Cited 1 time

Online Publication Date: 17 December 2004

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Abstract Unavailable

A NEW METHOD OF PRODUCING AND CONTROLLING THE EMISSION OF POSITIVE IONS

F. G. Cottrell, C. H. Kunsman, and R. A. Nelson

Rev. Sci. Instrum. 1, 654 (1930); http://dx.doi.org/10.1063/1.1748652 (8 pages) | Cited 6 times

Online Publication Date: 17 December 2004

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Abstract Unavailable

A COMPARATOR FOR SPECTROSCOPIC WORK

Erik Bäcklin

Rev. Sci. Instrum. 1, 662 (1930); http://dx.doi.org/10.1063/1.1748653 (5 pages)

Online Publication Date: 17 December 2004

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Abstract Unavailable

AN APPARATUS FOR OBTAINING HIGH SPEEDS OF ROTATION

J. W. Beams

Rev. Sci. Instrum. 1, 667 (1930); http://dx.doi.org/10.1063/1.1748654 (5 pages) | Cited 29 times

Online Publication Date: 17 December 2004

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Abstract Unavailable

ON THE GEIGER‐MÜLLER TUBE AS A QUANTITATIVE ION‐COUNTER

J. A. Van den Akker

Rev. Sci. Instrum. 1, 672 (1930); http://dx.doi.org/10.1063/1.1748655 (12 pages) | Cited 6 times

Online Publication Date: 17 December 2004

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A SIMPLE ATTACHMENT TO ORDINARY U‐TUBE MANOMETERS FOR MAINTAINING CONSTANT PRESSURE

J. A. Van den Akker

Rev. Sci. Instrum. 1, 684 (1930); http://dx.doi.org/10.1063/1.1748656 (3 pages)

Online Publication Date: 17 December 2004

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Abstract Unavailable

THE PROPERTIES OF SPUTTERED METAL RESISTORS

L. C. Van Atta

Rev. Sci. Instrum. 1, 687 (1930); http://dx.doi.org/10.1063/1.1748657 (4 pages) | Cited 3 times

Online Publication Date: 17 December 2004

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Satisfactory high resistances have been made by sputtering platinum on soft glass rods and embedding the rods in paraffin in glass tubes for protection. These resistances are useful for measuring small currents in conjunction with an electrometer, by the resistance shunt method. When properly prepared, sputtered resistors are found to change but slowly with age (tests lasted over 15 months), thus overcoming the principal defect of sputtered metal resistors. They fulfill the following requirements excellently: no trace of polarization, a negligible temperature coefficient, and Ohm's Law is obeyed.

A DESIGN OF METAL X‐RAY TUBE

N. S. Gingrich

Rev. Sci. Instrum. 1, 691 (1930); http://dx.doi.org/10.1063/1.1748658 (3 pages) | Cited 3 times

Online Publication Date: 17 December 2004

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Abstract Unavailable

ABSTRACTS OF ARTICLES RELATING TO NEW INSTRUMENTS AND METHODS

Rev. Sci. Instrum. 1, 696 (1930); http://dx.doi.org/10.1063/1.1748659 (9 pages)

Online Publication Date: 17 December 2004

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Abstract Unavailable
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