History Of Technology in Education

Padlock (1720)                                         Polhem devises a portable lock that effectively resists tampering.  Introduction                  Primitive padlocks have been come around since medieval times, but their design left them prone to force or picking. In 1720, Swedish inventor CHRISTOPHER POLHEM (1661-1751) conjured up a lock that was much more resistant to the dexterous hands of lockpickers.  Information                                            Polhem was one of the most gifted mechanical engineer of his day. After study mathematics, physics and engineering at Uppsala University, he set up a clock repairer. His ingenuity was soon spotted by important patrons, including King Charles XI of Sweden. Polhem went on to design many intricate devices both small (watch mechanisms) and large (industrial Machinery). Perhaps his most enduring invention, however, was the PADLOCK. His basic design comprises an elliptical cast iron body containing a series of rotating disk. W

                                                                                                        CREDIT CARD(1950)                                         MC Namara derives a new way to pay bills.       Introduction                                        The concept of credit is not a new one. The word ‘credit comes from the latin word CREDO, that means believe or trust, and we know that the Egyptians were using credit methods over 3000 years ago.     Information                                            The credit card is a system of payment and is named after the plastic card issued to people who subscribe to the system. Although the term was used several time in Edward Bellamy’s 1887 novel looking Backward and Western Union issued charge cards to user from 1914 But the modern credit cards was not invented untill 1949. It is said that Frank X.MC Namara, a New York banker, comes up with the idea after forgetting his wallet when out enterting clients. He distributed 200 Din

                                          Safety Match It is the very common thing in human life.Safety Match was developed in 1844 by the swedish chemistry professor GUSTAF - ERIK- PASCH(1788-1862). He replaced the dangerous white phosphorous in the flammable mixture coating the Match head with nontoxic red phosphorus, which was far less flammable. After obtaining a patentfor the new safety Match , pasch manufactured them in a factory in Stockholm by high costs. Another swede John -Edvard-Lundstron ,improve the pasch's safety match by placing the red phosphorus on sandpaper on the outer edge of the box,and in 1855 he obtained a patent for his new safety match.This model was manufactured on a large scale and Lundstrom,along with his brother Carl -Frans, created a virtual global monopoly on safety match.

                               HARD DISK DRIVE “THE 1 ST MAGNETIC SLURRY COATING ON THE 1 ST DISK DRIVE WAS POURED ……FROM DIXIE CUP”                            Johnson and IBM gives computer users direct access to their data ……  Introduction                                                               For most of the twentieth century, the primary medium for data entry, storage and processing was the punched card.in the 1930’s IBM hired teachers and inventor Reynold B. Johnson(1906-1998) to develop the IBM 805 test-scoring machine to convert pencil marks on forms in to punched cards.20 Years later, Johnson Led the team that developed the technology that made the vast majority of punched cards obsolete- The Hard Disk.   Information                                                                Finally Johnson and his team made a model hard disk but a main problem was come out that was the read-write heads from hitting and damaging the disks. Jhonson and his team was solved th