When was the piano hinge invented

Builders generally use plain butt hinges for lightweight interior doors. These durable hinges are ideal for heavy entryway doors or those that sustain frequent use. To assure a door closes behind you, use a spring-loaded butt hinge. Often used on screen doors, you can calibrate these hinges to open or close with varying degrees of tension. Shown: 3. When closed, it looks like a regular hinge. For specialty woodworking projects, like a box or small cabinet, use the barrel hinge.

This small hinge is ideal for projects where you want the hinge concealed from view. To install, simply drill holes the right size to accommodate the barrels and insert the hinge. Typically made of brass, barrel hinges are not designed for load-bearing applications.

They can be self-closing and, with the aid of a couple of screws, adjusted. You can also find larger concealed hinges for doors.

Also called pivot hinges, they resemble the blades of a pair of scissors, attached at a pivot point. You mortise one hinge leaf into the end of the cabinet door and the other into the cabinet.

No model. The object of the present invention is to provide for pianos and the like a simple and inexpensive hinge, which will be concealed when the fall-board is closed, and which will present a neat and ornamental appearance when the piano is open. The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claim hereto appended.

In the drawings, Figure l is a perspective view of a hinge constructed in accordance with this invention. Referring to the accompanying drawings, 1 and 2 designate leaf-plates, which are secured to the opposed faces of the fall-board 3 and the frame at of a piano, and which are provided with a series of slots 5.

On taller doors H hinges were occasionally used in the middle along with the HL hinges. Butler Tray Hinge — Fold to 90 degrees and also snap flat. They are for tables that have a tray top for serving. Card Table Hinge — Mortised into edge of antique or reproduction card tables and allow the top to fold onto itself. Drop Leaf Table Hinge — Mounted under the surface of a table with leaves that drop down.

Since at least medieval times there have been hinges to drawbridges for defensive purposes for fortified buildings. Hinges are used in contemporary architecture where building settlement can be expected over the life of the building.

For example, the Dakin Building, Brisbane, California was designed with its entrance ramp on a large hinge to allow settlement of the building built on piles over bay mud.