Drum chronograph, Sydney Observatory
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Drum chronograph, Sydney Observatory
Drum chronograph, Sydney Observatory, Sydney, Australia. This observatory was established in 1858. This is a 4-pendulum drum chronograph, with the four pendulums at right and a cylinder of recording paper at left. The pendulums and rotating gear system (lower left) ensure a steady rotation that can be adjusted to a faster or slower rate. A pen (centre left) traces a mark on the paper wrapped around the cylinder, providing a graphical record for events and the time at which they occurred. This device would have been used with a transit instrument to record the timing of astronomical observations
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9225607
© ROYAL ASTRONOMICAL SOCIETY/SCIENCE PHOTO LIBRARY
1900s Australia Australian Clock Cylindrical Device Instrument Paper Pendulum Recorder Sydney
EDITORS COMMENTS
This print showcases the intricate design of a Drum chronograph at Sydney Observatory in Australia. Established back in 1858, this historical observatory played a crucial role in astronomical research during the 19th and early 20th centuries. The Drum chronograph featured in the image is an impressive technological marvel of its time. With four pendulums positioned on the right side, it boasted a rotating gear system that ensured precise timing for astronomical observations. The speed of rotation could be adjusted accordingly, thanks to its innovative mechanism. At the left side of the device, a cylindrical recording paper wrapped around a drum cylinder awaited its mark. A pen located at the center would trace lines on this paper as events occurred, creating graphical records for further analysis. This instrument was often used alongside a transit instrument to accurately record celestial timings. Its functionality allowed astronomers to meticulously document their observations and contribute valuable data to our understanding of space. As we gaze upon this monochrome photograph, we are transported back to an era where scientific exploration thrived amidst technological advancements. It serves as a reminder of how far we have come in unraveling the mysteries of our universe while paying homage to those who dedicated themselves to expanding our knowledge through instruments like this Drum chronograph at Sydney Observatory.
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