Um chronographo de construção simples, permittindo registrar intervallos de tempo de 1 a 60 segundos
<abstract language="eng">Descriptive memorial of a chronograph made from a common chronoscop (Eastman Timer). The chronoscop has been modified in order to permit to adjust distinct cog-wheels, everyone in its turn, to the axis of the seconds hand. Each of these cog-wheels holds a def...
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| Format: | Article |
| Language: | English |
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Instituto Oswaldo Cruz, Ministério da Saúde
1930-01-01
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| Series: | Memórias do Instituto Oswaldo Cruz. |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02761930000100004 |
| Summary: | <abstract language="eng">Descriptive memorial of a chronograph made from a common chronoscop (Eastman Timer). The chronoscop has been modified in order to permit to adjust distinct cog-wheels, everyone in its turn, to the axis of the seconds hand. Each of these cog-wheels holds a definite number of teeth accordingly with the time interval ones desire to record. A wheel with 20 teeth, for instance, is available for recording time in periods of each three seconds, another wheel with 6 teeth, will reckon time in intervals of 10 seconds and so on. These wheels may be interchanged most easily, which enables, with the same apparatus, to have at hand a time recorder for any time interval between one and sixty seconds. To register the time the apparatus is connected with a dry cell. A wire is attached to a binding post on the metal case of the apparatus, another wire being connected with an isolated binding post placed in front of the cog-wheel and fastened to a platinum point allowing open or shut the circuit, every time one of the cogs of the wheel comes into contact with this platinum point. A signal magnet is placed also in the circuit for writing the time intervals on the revolving drum. |
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| ISSN: | 0074-0276 1678-8060 |