This was succeeded by the beart mhòr (big loom in Gaelic) handloom, used to produce tweeds from around the turn of the 20th Century. It was of much larger construction but the healds worked on the same principle as in the bheart bheag. It had, however, a sleyboard with a box at either end and the shuttle was thrown by pickers, to which movement was imparted by cords controlled by the weaver. The shuttle was bigger and had wheels on the underside and back, and it was propelled across the warp by a sharp pull on a handle. This was known as the ‘flying shuttle’. The loom had a greater output per hour than its predecessor but was much heavier and so was often more used by men. The Big Loom first appeared on the islands in 1890s and by 1911 there were over 250 in operation.
Introduced after World War 1, the Hattersley Domestic Loom helped ex-servicemen who had lost hands and arms to earn a living through weaving. Its rate of production was superior and it was capable of weaving more complex patterns. The loom was powered by foot treadles and the shuttle was thrown automatically as the tweed was woven. The first 30 of these looms arrived on the islands in 1919, of 36 inches reed space and single shuttles and it became the mainstay of the industry for the next six decades. In 1924 the first six shuttle, 40 inch reed space looms arrived in Stornoway and this type of loom was the most commonly used loom in the islands and is still in use today
The basic Mark I loom was treadle operated and the amount of effort to start the machine from rest, and to keep it in motion,varied from loom to loom, dependent on how well it has been erected and tuned. Basically, no two looms feel the same to weave on – they all have distinct personalities – and this is where their charm comes from.
The first batch of the Domestic Hattersley Mark 2 were delivered to the islands in 1980. There were number of essential differences between these and the Mark 1, namely the revolving box is of a larger size to hold a larger shuttle which can accommodate a larger weft pirn; the bottom shaft is supported by self-aligning bearings placed towards the outside of each crank; the tappets are mounted on a counter shaft which runs parallel with the bottom shaft. The new version had both advantages and disadvantages to the Mark 1
Today the vast majority of our Harris Tweed is woven on The Bonas Griffiths. Trialled in the early 1990’s and shortly after introduced as the new industry standard, the Bonas Griffiths loom was of double width to meet commercial demand for a wider, lighter cloth. It was twice the size, cleaner, quieter and took less effort to work. The old shuttle was replaced by a flexible rapier system (eliminating the need for pirn winding). The loom is now the work-horse of the Harris Tweed industry being used by the majority of the 140 weavers currently working in the Outer Hebrides.
Engineers are currently working on a number of improvements to the current looms to improve efficiency by around 20% by lightening the mechanisms and improving yarn fault detection for the weaver but whatever the future brings one thing is assured, Harris Tweed will always be woven by hand, without the aid of power, at the homes of weavers in the Outer Hebrides…