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When the contact printer is plugged into an outlet the safelight comes on. The incoming hot wire is attached to the left side of the safe light (top contact in interior photo above). When the switch shaft is up as in this photo the current passes through the safelight and through the white light socket and bulb which is grounded thereby lighting the low wattage safelight. When the switch shaft is in the up position there is a slight space under the metal strip going between the two posts so that current cannot pass. This causes almost all of the current to go through the white bulb with virtually no current going through the yellow bulb, thus the white bulb lights brightly and the yellow bulb not at all. The second photo shows the interior and the mechanism for adjusting position of the lights. A shaft protrudes through the right and is turned to move the lights left and right (up and down in the photo).

When the shaft is depressed the current passes through the black wired attached to the upper post on the switch and down through the lower black wire which is attached to left (upper post of the white light socket in the above photo) screw post on the high wattage white light. When the shaft is depressed the hot contact moves down and touches the white light contact (white wire at bottom). When the shaft is depressed the current goes to the white bulb dirrectly which is well grounded. When the shaft on the switch is depressed the safeligjht goes off and the white light comes on. A small shaft protruding through the upper left is depressed to switch the safelight off and the white light on. The above photo shows the exterior of the printer and the folding platen on top that holds the film and paper in place by way of the locking switch on the left. The above photo shows the switching mechanism for turning the safelight off and the white light on. It came in two variatons: the cherry and brass model shown above, and a less expensive model of light mahogany color with nickel plated steel parts.

There are so many different Browie models and variations of each model that a very extensive collection could be established consisting of Brownie cameras only, and even more so if you would include modern versions. But, I agree having a dual gang relay so the L&N are mechanically linked does sound better. Indeed I have read that DC is a much better option regarding EMF. The photo on the right shows the interior which is much simpler than the previous printer. The photo on the above left shows the platen folded back exposing the glass and the adjustable metal sheets used for various sizes of print. The third photo shows the film carrier and the optional accessory viewfinder for the original and several other Brownie models that clipped onto the box (25 cents extra!). The sawteeth on the underside of the roll permitted the developing fluids to reach the film once the reel was put into the developing tank. The box was used for winding film from the original roll onto a reel for developing as shown on the far right.

Please keep both, what is electric cable maximum voltage AND current rating in mind when selecting the right fuse. The reason RCDs typically trip at 5-30mA is because this amount of current for a couple hundred milliseconds doesn’t cause permanent injury to humans. Type B RCDs can detect DC ground fault currents (not such an easy thing to do), this is a good article explaining everything about them and how they work. 13. You can even go further and set the voltage output of the DC-DC converter to the exact voltage that the laptop needs. The dial head could be set to angle in different directions. Coaxial cable - used for radio frequency signals, for example in cable television distribution systems. Ribbon cable - Useful when many wires are required. They use particles such as electrons or photons, or superconductor cable loops. Conventional solar installations for households always use an inverter, which converts the low-voltage DC power from a solar panel into the high-voltage AC power used by main appliances. The main dangers are electric shock (non-fatal but painful), fire, battery explosion, and component damage. One of the best kept mysteries are what colours AE phones were available. Wondering about AE Colours?