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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6698459 | Coil spring assembly machine An apparatus for assembling coil springs together into a matrix of coil springs. The apparatus has workholders with respective grippers that receive and hold portions of end turns of respective coil springs, and a loader supporting the workholders for mov... | 03/02/2004 |
| 6155310 | Machinery for automated manufacture of formed wire innerspring assemblies Machinery for automated manufacture of formed wire structures such as innerspring assemblies for mattresses and seating and flexible support structures includes one or more coil formation devices configurable to produce generally helical spring coils havi... | 12/05/2000 |
| 5788051 | Device for transferring springs to an assembly machine Device for transferring springs to an assembly machine, wherein the sprints to be transferred are retained in a guide device wherein for the transfer of the springs sliders are provided engaging at the end winds of the springs.... | 08/04/1998 |
| 4686753 | Coil spring assembly machine A machine for connecting successive rows of coil springs together into a coil spring assembly. The machine, in preferred form, initially picks up a row of coil springs by inserting a pick up finger into the barrel of each coil and moving the springs onto ... | 08/18/1987 |
| 4593809 | Coil spring assembly machine A machine for connecting successive rows of coil springs together into a coil spring assembly. The machine, in preferred form, initially picks up a row of coil springs by inserting a pick up finger into the barrel of each coil and moving the springs onto ... | 06/10/1986 |
| 4593726 | Coil spring assembly machine A machine for connecting rows of coil springs together into a coil spring assembly. The machine initially picks up a row of coil springs by inserting a pick up finger into the barrel of each coil and moving the springs onto a support platen. While transpo... | 06/10/1986 |
| 4553572 | Coil spring assembly machine A machine for connecting successive rows of coil springs together into a coil spring assembly. The machine, in preferred form, initially picks up a row of coil springs by inserting a pick up finger into the barrel of each coil and moving the springs onto ... | 11/19/1985 |
| 4513793 | Security wire fabric and apparatus and method for making same A wire fabric and apparatus and method of making same including processing wire to produce a wire fabric of open construction and with the wire fabric formed with small openings relative to the gauge of the wire so as to form a security mesh, including co... | 04/30/1985 |
| 4368761 | Centering device for a spring core mounting machine A centering device is provided in a spring core mounting machine having at least one pair of clamping jaws for holding together the terminal windings of adjacent helical springs while they are being connected by threading wire helices through them, with t... | 01/18/1983 |
| 3980108 | Round mesh weaving machine and multi-output power transmission unit therefor A round mesh weaving machine which may be used for producing fire screen, fencing, and the like which employs a transmission unit having a single power input and a plurality of power outputs. In the illustrated embodiment, the transmission unit produces a... | 09/14/1976 |
