photos_and_videos/TimelinePhotos_kg5QueHwVw/94819585_268162841248543_20482286803

photos_and_videos/TimelinePhotos_kg5QueHwVw/94819585_268162841248543_2048228680366292992_n_268162837915210.jpg ETYMOLOGY: “SHUTTER DOG”

In engineering, a dog is a tool or part of a tool that prevents movement or imparts movement by offering physical obstruction or engagement of some kind.

It may hold another object in place by blocking it, clamping it, or otherwise obstructing its movement. Or it may couple various parts together so that they move in unison – the primary example of this being a flexible drive to mate two shafts in order to transmit torque.

This word usage is a metaphor derived from the idea of a dog (animal) biting and holding on, the “dog” name derived from the basic idea of how a dog jaw locks on, by the movement of the jaw, or by the presence of many teeth.

The first shutter dog named the “rat tail shutter dog” was hand forged in Colonial Williamsburg. Made with a hammer and anvil, steel was formed into an elongated hook that spiraled at the bottom. The earliest method of mounting the rat tail shutter dog involved a wrought nail hammered in to a wooden structure. The wrought nail later evolved in to a threaded bolt.ETYMOLOGY: “SHUTTER DOG”

In engineering, a dog is a tool or part of a tool that prevents movement or imparts movement by offering physical obstruction or engagement of some kind.

It may hold another object in place by blocking it, clamping it, or otherwise obstructing its movement. Or it may couple various parts together so that they move in unison – the primary example of this being a flexible drive to mate two shafts in order to transmit torque.

This word usage is a metaphor derived from the idea of a dog (animal) biting and holding on, the “dog” name derived from the basic idea of how a dog jaw locks on, by the movement of the jaw, or by the presence of many teeth.

The first shutter dog named the “rat tail shutter dog” was hand forged in Colonial Williamsburg. Made with a hammer and anvil, steel was formed into an elongated hook that spiraled at the bottom. The earliest method of mounting the rat tail shutter dog involved a wrought nail hammered in to a wooden structure. The wrought nail later evolved in to a threaded bolt.