William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 5138850 | Spring biased pattern bars having electromagnetic selectors A circular knitting machine having knitting needles actuated by pattern bars, electromagnetic selectors for adjusting the knitting needles into various operating positions, mechanical controls cooperating with the electromagnetic selectors, selector eleme... | 08/18/1992 |
| 5042275 | Restoring device for a needle selecting apparatus of a circular knitting machine A restoring device for a needle selecting apparatus of a circular knitting machine has a housing mounted on the needle selecting apparatus, and a slider located in the housing for each set of selecting plates of the selecting apparatus. Each slider is dis... | 08/27/1991 |
| 4751829 | Knitting machine A circular knitting machine includes needles and loop-sinking sinkers longitudinally movable relative to each other in opposite directions. Each needle is provided with a non-movable slide. The movements of the needles and the sinkers are controlled by ca... | 06/21/1988 |
| 4541254 | Needle selector device for multi-system knitting machine A needle selector device for a multi yarn feed knitting machine comprises a stack of angularly movable sliders mounted about a common axis, the sliders being selectively movable between three positions, namely the knitting, tucking and floating positions.... | 09/17/1985 |
| 4138865 | Circular knitting machine having a multiple selection system for the needles A circular knitting machine has a needle selection system which can be set up to provide selection under electronic control, or to provide for manual selection. The selection system has a plurality of slidable selection cams which are controlled by an ele... | 02/13/1979 |
| 4099390 | Selection device for the needles of a knitting machine Electrically actuated jack selectors for a knitting machine which are normally positioned out of engagement with the needle jacks or pattern jacks of the knitting machine. When each of the jack selectors is actuated, either by a perforated tape loop or by... | 07/11/1978 |
| 3981160 | Needle selecting means The invention relates to a control system for the selection of knitting needles in a multi-feed circular knitting machine with the aid of jacks and means for selectively activating and inactivating desired jacks. A removable stand having holes for the rec... | 09/21/1976 |
| 3950965 | Auxiliary linkage for amplifying needle movement in circular knitting machines The invention relates to a control system for the lifting or raising of needles within their respective grooves or channels about the circumference of a conventional multi-feed circular knitting machine, with the aid of jacks and operational cams for said... | 04/20/1976 |
| 3945223 | Apparatus and method of knitting and elements thereof A needle bed is provided with laterally spaced apart longitudinally extending needle grooves in which there is slidably positioned a needle, a jack and a multiplier rocker between the jack and the needle, the rocker pivoting forwardly-rearwardly about a p... | 03/23/1976 |