The photo at the left shows the lamp, lens, mercury bath bearing, and winding apparatus which was installed on the Pachena Point lighthouse in February 1908. The lens is a 1st order Fresnel lens made by Chance Brothers of Birmingham England – one of the largest sizes possible, and it all sits on a wooden tower!
The glass lens, 3 m tall, 2.5 m wide and weighing 400 kg was brought by boat around Cape Horn. The 1000-watt bulb in use now puts out four million candlepower and is visible from Washington State’s Olympic Peninsula. (reference)
This graphic was sent to me by a friend but I have no idea of the source. I have searched Google and the only mention of the photo that I found was in reference to the Eddystone lighthouse, which this definitely is not.
It is a wonderful drawing to see, as I was a keeper on Pachena Point lighthouse in the late 1970s and saw first-hand the wonderful double bulls-eye (aka double-flashing) lens with all its glass encased in its framework of bronze. The clockwork mechanism had been refurbished by the keeper Bob Noble, and it could actually be run like in the olden times in place of the modern electric motor. Imagine getting this 400 kg lens turning at all, but what was amazing was that it could easily be turned by hand as it sat on its bed of mercury.
Unfortunately the light revolves no more as automation has taken its toll. The lens still remains but it is covered over, and a modern battery-operated light in a plastic lens operates from a pole on the seaward side of the tower. What a shame!
These Fresnel lenses were so well made that like a magnifying glass they could focus not only the lighthouse light source but also the light from the sun. The focused beam from the sun was so powerful that it could start a fire on the lighthouse grounds outside, hence the use of heavy curtains to shield the lens during daylight hours in the early days to prevent these fires.1
Below you will find a gallery of photos showing the light at Pachena as well as close-ups of the lens and its associated equipment. It was a dream to see – too bad it is not open to the public now.
Below is a photo from the 1930s showing the lighthouse with the curtains drawn. (Please observe the copyright notice before copying).
Below is an accidental but controversial photo I took in the 1970s while stationed at Pachena.
The reason that this is controversial is that it proves the government made a mistake when it created a new postage stamp in 2008 featuring Pachena Point lighthouse.