TANSO

On Hardness Testing for Metal-Graphite Brush.

Tatsuo Matsukawa, Keiichiro Shoji

1958 Volume 6 Issue 3 Pages 82-84
Published: March 15, 1958
Released on J-STAGE: March 01, 2011

DOIhttps://doi.org/10.7209/tanso.6.82

JOURNAL FREE ACCESS

Show abstractHide abstract

Shore hardnesstester has been applied of metal-graphite brush, but this tester does not show the true hardness for these mild materials.
Rockwell superficial test (Steel Ball 1/4″, Load 15 kg) shows real hardness for metal-graphite brush.
The hardness of metal-graphite brush decreases with increasing graphite content.
There is distinct difference between hot- and cold- pressed metal-graphite brush.

View full abstract

Download PDF (2105K)
Tentative Manufacture of Carbon Brush for Electric Car Main Motor (Report II)....Fundamental test

T. Akanuma, M. Kumagai

1958 Volume 6 Issue 3 Pages 85-92
Published: March 15, 1958
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.7209/tanso.6.85

JOURNAL FREE ACCESS

Show abstractHide abstract

Tests were made on stability of pitch cokes to pulverization. Investigations on shape of powder; effect of binder on pulverizability; relation between pulverization and production process, between pulverization of particles and pressure; stability to pulverization, indicate that pitch cokes should have higher mechanical strength. Five grades of pitch cokes were selected and crushed in a hot mill to obtain the particle size distribution. It is observed that two peaks stand out in the curve; the crest of the first peak tends to shift with time toward minor particles. Converting the second peak in terms of the grade of minor particle size gives the final limit of pulverizability and observation of the shifting crest of the first peak gives the hardness of pitch coke.
These are stated with theoretical explanations from a new angle.

View full abstract

Download PDF (1191K)
On the Experiment of Indicating the Commutation Sparks of Electric Machine.

Tomoyuki Somiya, Junkei Yamana

1958 Volume 6 Issue 3 Pages 93-96
Published: March 15, 1958
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.7209/tanso.6.93

JOURNAL FREE ACCESS

Show abstractHide abstract

A photo-transistor is used in conjunction with an amplifier and an electronic spark counter to indicate commutation sparks. The luminous flux emitted by the sparks under the brushes is given to a photo-transistor as an input.
Preliminary experimental results were obtained, and briefly discussed.

View full abstract

Download PDF (702K)
[title in Japanese]

[in Japanese]

1958 Volume 6 Issue 3 Pages 97-103
Published: March 15, 1958
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.7209/tanso.6.97

JOURNAL FREE ACCESS

Download PDF (1196K)
Pyrolysis of Crosslinked Styrene Polymers

F.H. Winslow, W. Matreyek

1958 Volume 6 Issue 3 Pages 104-107
Published: March 15, 1958
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.7209/tanso.6.104

JOURNAL FREE ACCESS

Download PDF (3008K)
[title in Japanese]

L.M. Currie, V.C. Hamister, H.G. MacPherson

1958 Volume 6 Issue 3 Pages 108-114
Published: March 15, 1958
Released on J-STAGE: June 28, 2010

DOIhttps://doi.org/10.7209/tanso.6.108

JOURNAL FREE ACCESS

Download PDF (1150K)

Register with J-STAGE for free!