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The barrel sizes can range from a narrow, long distance 5- or 10-degree spot to a broad and short-distance 50- or even 90-degree. The first 90-degree profile lantern was developed by Selecon Performance Lighting as part of their "Pacific" range of products.
These English chandeliers were made largely of glass, with the metal parts limited to the central stem and receiver plates and bowls. The metallic part may be silvered or silver-plated, and the silver-plating inside the glass stem can create the illusion that the chandelier is made entirely of glass. [51]
A hook gauge is the most reliable way to determine the actual size of a tool. Even though most hooks and needles have metric sizing, tool dimensions vary slightly between different manufacturers. Non-metric sizing conventions also change over time. For instance, different sizing charts rate a 4.0mm hook as either a U.S. G/6 or an F/5. [2]
Hook-and-loop fasteners, commonly known as Velcro (a genericized trademark), hook-and-pile fasteners or touch fasteners are versatile fastening devices that allow two surfaces to be repeatedly attached and detached with ease. Invented in the mid-20th century, they are widely used in clothing, accessories, and various industrial and consumer ...
Fluorescent lamps in various embodiments. Since their introduction as a commercial product in 1939, many different types of fluorescent lamp have been introduced. Systematic nomenclature identifies mass-market lamps as to overall shape, power rating, length, color, and other electrical and illuminating characteristics.
Gusset plates can be made into a variety of shapes and sizes and from a range of materials. Gusset plates are usually square or rectangular, but can be triangular or made into a customized shape to fit the joint. The shape of each plate is designed so that welding or bolts can be applied to different edges of the plate. [2]
A brass escutcheon plate. The upper disc is hinged, allowing it to swivel over the open keyhole, or aside to allow the keyhole to be used. An escutcheon (/ ɪ ˈ s k ʌ tʃ ən / ih-SKUTCH-ən) is a general term for a decorative plate used to conceal a functioning, non-architectural item.
This was a raised elevation or "hump" in the wire hook that prevented the eye from slipping out of the hook, "except at the will of the wearer". [ 5 ] In 1893, Marie Tucek patented the "Breast Supporter" – the first garment similar to the modern-day bra, which used separate pockets for the breasts and straps that went over the shoulder and ...