canon7dude
HR Solenoid
3 Heiland Research Solenoids and a Garaflex battery holder with pushbutton trigger and flashbulb port.
The HR Solenoid was an electronic shutter release. Designed for cameras that had lenses mounted in leaf shutters on the front of a camera. The leaf shutters generally had a lever shutter release. The HR Solenoid would be mounted beside the lens and linked on to the shutter lever. A cable ran from the solenoid to the battery holder and was fired by the pushbutton.
The HR Solenoid is referred to as a "flash solenoid" but this is a misnomer as it simply is designed to trip the shutter. It uses a small electrical current to do this and thus was almost always attached via cable to the battery holder/flash handle for this. Since the same button that fired the solenoid could also fire a flashbulb the HR solenoid became a critical component in the timing of the synchronization between shutter and flashbulb.
A complex battery holder like the Heiland of Star Wars lightsaber fame would have multiple ports to attach flashes, solenoids, and remote triggers. of course they were all wired back then. Today it would be simple to attach wireless to the solenoid or flash...
HR Solenoid
3 Heiland Research Solenoids and a Garaflex battery holder with pushbutton trigger and flashbulb port.
The HR Solenoid was an electronic shutter release. Designed for cameras that had lenses mounted in leaf shutters on the front of a camera. The leaf shutters generally had a lever shutter release. The HR Solenoid would be mounted beside the lens and linked on to the shutter lever. A cable ran from the solenoid to the battery holder and was fired by the pushbutton.
The HR Solenoid is referred to as a "flash solenoid" but this is a misnomer as it simply is designed to trip the shutter. It uses a small electrical current to do this and thus was almost always attached via cable to the battery holder/flash handle for this. Since the same button that fired the solenoid could also fire a flashbulb the HR solenoid became a critical component in the timing of the synchronization between shutter and flashbulb.
A complex battery holder like the Heiland of Star Wars lightsaber fame would have multiple ports to attach flashes, solenoids, and remote triggers. of course they were all wired back then. Today it would be simple to attach wireless to the solenoid or flash...