Friday, August 07, 2020

August 7th in stamps Friedrich Spee, Joseph Marie Jacquard


Here are some events that happened on August 7th. It could be an event or a person that died or was born on that day

1635 Died: Friedrich Spee, German poet and academic (b. 1591)

Friedrich Spee (also Friedrich Spee von Langenfeld; February 25, 1591 – August 7, 1635) was a German Jesuit priest, professor, and poet, most well-known as a forceful opponent of witch trials and one who was an insider writing from the epicenter of the European witch-phobia. Spee argued strongly against the use of torture, and as an eyewitness he gathered a book full of details regarding its cruelty and unreliability. He wrote, "Torture has the power to create witches where none exist."
Spee's literary activity was largely confined to the last years of his life, the details of which are relatively obscure. Two of his works were not published until after his death: Goldenes Tugendbuch (Golden Book of Virtues), a book of devotion highly prized by Leibniz, and Trutznachtigall (Rivaling the Nightingale), a collection of fifty to sixty sacred songs, which take a prominent place among religious lyrics of the 17th century and have been repeatedly printed and updated through the present.

German stamp depicting Friedrich Spee von Langenfeld

Germany Friedrich Spee von Langenfeld, Poet, 1991


1834 Died: Joseph Marie Jacquard, French weaver and inventor, invented the Jacquard loom (b. 1752)

Joseph Marie Charles  (called or nicknamed) Jacquard (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 modern day computer.

The Jacquard Loom is a mechanical loom that uses pasteboard cards with punched holes, each card corresponding to one row of the design. Multiple rows of holes are punched in the cards and the many cards that compose the design of the textile are strung together in order. It is based on earlier inventions by the Frenchmen Basile Bouchon (1725), Jean-Baptiste Falcon (1728) and Jacques Vaucanson (1740). 

To understand the Jacquard loom, some basic knowledge of weaving is necessary. Parallel threads (the “warp”) are stretched across a rectangular frame (the "loom"). For plain cloth, every other warp thread is raised. Another thread (the “weft thread”) is then passed (at a right angle to the warp) through the space (the “shed”) between the lower and the upper warp threads. Then the raised warp threads are lowered, the alternate warp threads are raised, and the weft thread is passed through the shed in the opposite direction. With hundreds of such cycles, the cloth is gradually created.

To stimulate the French textile industry, which was competing with Britain's industrialized industry, Napoleon Bonaparte placed large orders for Lyon's silk, starting in 1802. In 1804, at the urging of Lyon silk merchant Gabriel Detilleu, Jacquard studied Vaucanson's loom, which was stored at the Conservatoire des Arts et Métiers in Paris. By 1805 Jacquard had eliminated the paper strip from Vaucanson's mechanism and returned to using Falcon's chain of punched cards. 

The potential of Jacquard's loom was immediately recognized. On April 12, 1805, Emperor Napoleon and Empress Josephine visited Lyon and viewed Jacquard's new loom. On April 15, 1805, the emperor granted the patent for Jacquard's loom to the city of Lyon. In return, Jacquard received a lifelong pension of 3,000 francs; furthermore, he received a royalty of 50 francs for each loom that was bought and used during the period from 1805 to 1811.


French stamp depicting Joseph Marie Charles

France 1934 Joseph Marie Jacquard





No comments:

Post a Comment