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It is the "Jacquard head" that adapts to a great many dobby looms that allow the weaving machine to then create the intricate patterns often seen in Jacquard weaving. Jacquard-driven looms, although relatively common in the textile industry, are not as ubiquitous as dobby looms which are usually faster and much cheaper to operate.
Joseph Marie Charles dit (called or nicknamed) Jacquard (French:; 7 July 1752 – 7 August 1834) was a French weaver and merchant. He played an important role in the development of the earliest programmable loom (the "Jacquard loom"), which in turn played an important role in the development of other programmable machines, such as an early version of digital compiler used by IBM to develop the ...
Punch cards are hardly used anymore - the electronic Jacquard machines are on the market for over 10 years now and cards are a huge cost factor. They are still being used in specialty weaving (money not being a big factor there with huge profit margins) and people that took advantage of the near destruction of the US textile industry and picked ...
A loom from the 1890s with a dobby head. A dobby loom, or dobbie loom, [1] is a type of floor loom that controls all the warp threads using a device called a dobby. [2]Dobbies can produce more complex fabric designs than tappet looms [2] but are limited in comparison to Jacquard looms.
A free arm houses the machine's feeder and bobbin driver in a tubular arm-shaped bed, enabling material to be wrapped around the mechanism during sewing rather than simply resting on top of it. A free arm greatly simplifies sewing tasks like darning and hemming on delicate fabrics and difficult-to-reach seams—uses for which Elna was heavily ...
The jacquard machines equipped with computers, wheels, punching cards, etc., allow the knitter more adjustments of yarn feeding, knitting, and tucking positions. These settings help in producing required motifs and complex design and pattern making. The size of the pointelle holes is adjustable to an extent with needle selection on the machine.
Roberts was a prolific inventor and manufacturer, ranging over turret clock-making, to road vehicles, to iron ship building, to a punching machine, operating on the same system as the Jacquard loom, for punching the rivet holes in the iron plates making up the railway bridge over the river Conwy in North Wales.
The input, consisting of programs ("formulae") and data, [13] [9] was to be provided to the machine via punched cards, a method being used at the time to direct mechanical looms such as the Jacquard loom. [14] For output, the machine would have a printer, a curve plotter, and a bell. [9]