Parliament door Hinges are H-shaped hinges (resembling butterfly wings) that were designed to allow both windows and doors to swing clear of their trim and lay flat when opened. This design keeps the maximum amount of space in the door or window opening available.

Parliament door hinge anatomy

The design of the parliament door hinge was developed for when a door or window needs to open 180 degrees and clear the frame’s molding. In order for parliament door hinges to clear projections, the screws are positioned on the hinges such that they align with the edge of the flap. This way the knuckle is free to hang over the edge of the door or window. As the overhang of the knuckle increases, so does the angle of the opening.

People often prefer parliament hinges when doing a restoration project because they bring a sense of character. They can be highly decorative and there are enough varieties, sizes and finishes available that you can achieve virtually any look you want.

History of parliament hinges

In the past, parliament hinges have also been known as dovetail hinges, wide throw hinges and (more commonly in the U.S.) butterfly hinges. You can find early examples of these hinges on antique cabinets and desks dating from the 1670s to the 18th century.

Depending on the manufacturer, the form of parliament hinge varies, and their size range is huge—from tiny jewelry box hinges to large (heavy-duty) hinges that are strong enough to support the heaviest doors.

Need help deciding on the hinge that’s perfect for your next project? Check out the wide selection of high-quality hinges at iHinge.com.

Feel free to contact us if you need help exploring your options.

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