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Crémone 2010 29 (8189597727)
A Crémone or "Crémone Bolt" is a type of decorative hardware used as a locking device to fasten a pair of casement windows. A knob or lever handle is linked by a rack and pinion to a pair of half-round rods or "surface bolts" which slide over the outside surface of the door or window and extend into sockets at the head and sill of the opening. The gear mechanism operates the two vertical rods at the same time; one rod extends up into the door head, and the other extends down into the door sill. The device is similar in appearance to an "espagnolette" lock, but uses a half-round rod. Shown from the rear, the parts of the crémone bolt gearbox (1) includes the lever or knob (3), which rotates the pinion gear (4), engaging the pair of rack gears (2), which push the two half-round bars (5) upward and downward at the same time (only the bottom bar is shown), into the sockets. References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Casement Window
A casement window is a window that is attached to its frame by one or more hinges at the side. They are used singly or in pairs within a common frame, in which case they are hinged on the outside. Casement windows are often held open using a casement stay. Windows hinged at the top are referred to as awning windows, and ones hinged at the bottom are called hoppers. Overview Throughout Britain and Ireland, casement windows were common before the sash window was introduced. They were usually metal with leaded glass, which refers to glass panes held in place with strips of lead called cames (leaded glass should not be confused with lead glass, which refers to the manufacture of the glass itself). These casement windows usually were hinged on the side, and opened inward. By the start of the Victorian era, opening casements and frames were constructed from timber in their entirety. The windows were covered by functional exterior shutters, which opened outward. Variants of cas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rack And Pinion
rack and pinion is a type of linear actuator that comprises a circular gear (the '' pinion'') engaging a linear gear (the ''rack''). Together, they convert between rotational motion and linear motion: rotating the pinion causes the rack to be driven in a line. Conversely, moving the rack linearly will cause the pinion to rotate. The rack and pinion mechanism is used in rack railways, where the pinion mounted on a locomotive or a railroad car engages a rack usually placed between the rails, and helps to move the train up a steep gradient. It is also used in arbor presses and drill presses, where the pinion is connected to a lever and displaces a vertical rack (the ram). In pipelines and other industrial piping systems, a rack displaced by a linear actuator turns a pinion to open or close a valve. Stairlifts, lock gates, electric gates, and the mechanical steering mechanism of cars are other notable applications. The term "rack and pinion" may be used also when the rac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Espagnolette
An espagnolette is a Lock (security device), locking device, normally mounted on the vertical frame of a French door or casement window. A handle or knob is connected to a metal rod mounted to the surface of the frame, about a metre above the floor. Operating the handle rotates the rod, which has hooks at each end that fit into sockets at the head and sill of the opening. This type of lock is often used on semi-trailer trucks to fasten the rear doors. It can be identified by the use of a round bar, instead of a half-round bar used on a crémone, crémone bolt. In the photograph, the decorative lever arm (1) is hinged to rotate 90 degrees out of a metal "keeper" bracket (2), and then pull away from the surface of the door, which rotates the round metal rod (3), and also the hook at the bottom of the rod to unfasten the mechanism from the metal "stop" (4) mounted on the floor and unfasten the door leaf. The rod, hook and stop at the top door head are not pictured. The door leaf swings ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
