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Crémone
Crémone or "Crémone Bolt" is a type of decorative hardware used as a locking device to fasten a pair of swinging windows or casement window. A knob or lever handle is linked by a rack and pinion gear 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. It is similar in appearance to an "espagnolette An espagnolette is a 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 ..." lock, but uses a half-round rod. Shown from the backside, the parts of the crémone bolt gearbox (1) includes the lever or knob (3), which rotates the pinion gear (4), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crémone
Crémone or "Crémone Bolt" is a type of decorative hardware used as a locking device to fasten a pair of swinging windows or casement window. A knob or lever handle is linked by a rack and pinion gear 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. It is similar in appearance to an "espagnolette An espagnolette is a 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 ..." lock, but uses a half-round rod. Shown from the backside, the parts of the crémone bolt gearbox (1) includes the lever or knob (3), which rotates the pinion gear (4), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lock (security Device)
A lock is a mechanical or electronic fastening device that is released by a physical object (such as a key, keycard, fingerprint, RFID card, security token or coin), by supplying secret information (such as a number or letter permutation or password), by a combination thereof, or it may only be able to be opened from one side, such as a door chain. A key is a device that is used to operate a lock (to lock or unlock it). A typical key is a small piece of metal consisting of two parts: the ''bit'' or ''blade'', which slides into the keyway of the lock and distinguishes between different keys, and the ''bow'', which is left protruding so that torque can be applied by the user. In its simplest implementation, a key operates one lock or set of locks that are keyed alike, a lock/key system where each similarly keyed lock requires the same, unique key. The key serves as a security token for access to the locked area; locks are meant to only allow persons having the correct key to ope ... [...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 casement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rack And Pinion
A 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 rotational motion into 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. A rack and pinion drive can use both straight and helical gears. Though some suggest helical gears are quieter in operation, no hard evidence supports this theory. Helical racks, while being more affordable, have proven to increase side torque on the datums, increasing operating temperature leading to premature wear. Straight racks require a lower driving force and offer increased torque and speed per percentage of gear ratio which allows lower operating temperature and lessens viscal friction and energy use. The maximum force that can be transmitted in a rack and pinion mechanism is determined by the tooth pitch and the size of the pinion as well as the gear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Espagnolette
An espagnolette is a 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 truck A semi-trailer truck, also known as a semitruck, (or semi, eighteen-wheeler, big rig, tractor-trailer or, by synecdoche, a semitrailer) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-traile ...s 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 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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