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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 6294977 | Thermal switch assembly A thermal switch assembly has a contact member of shape memory alloy sandwiched between a pair of electrically conductive outer members. A contact arm on the contact member has a deformed shape at normal temperatures and a recovered shape at elevated temp... | 09/25/2001 |
| 6069551 | Thermal switch assembly A thermal switch assembly has a contact member of shape memory alloy sandwiched between a pair of electrically conductive outer members. A contact arm on the contact member has a deformed shape at normal temperatures and a recovered shape at elevated temp... | 05/30/2000 |
| 6064294 | Temperature switch, particularly adjustable temperature regulator A temperature regulator operating with a hydraulic expansion capsule or diastat (5) has a lever mechanism (30) for force transmission between the diastat and the switch spring (21) of a snap switch (20). For protecting the switch spring against overloadin... | 05/16/2000 |
| 6046666 | Thermal actuator A known thermal actuator includes a capsule, which contains a diaphragm controlling the position of a stem. A thermal expansion substance like wax is contained in the capsule which operates as a thermostat in a thermostatically controlled valve such as a ... | 04/04/2000 |
| 5019456 | Article which can change its shape An article comprises a bent strip 2, the ends (4) of which can be rotated relative to each other to cause the strip to change its shape. One embodiment of the strip is initially in the shape of a split circle. Rotation causes the strip to adopt an interme... | 05/28/1991 |
| 4374373 | Multiple contacts, snap-action, thermal switch A snap-action thermal switch adapted to be operated by an expansion element. The switch includes a switch reed pivotable between two switching positions, a switch spring exerting force components in a longitudinal direction and in a pivoting direction of ... | 02/15/1983 |
| 4368449 | Contact mechanism for temperature switch using thermal expansion member A contact mechanism for a temperature switch using a thermally expandable member wherein a plate making a circular arc motion is provided at a tip of a piston which is moved by the thermal expansion member, and a coil spring is mounted between a middle of... | 01/11/1983 |
| 4262274 | Thermal electric switch A thermal electric switch having a thermally expansible material operating on an elastomeric diaphragm to operate a switch wherein the switch is an electrically conductible spring element and is operated by a force transmitting arrangement from the diaphr... | 04/14/1981 |
| 4075592 | Electrical load outage detector An electrical switch comprises three flat terminals secured to an insulating base. The two outer terminals are arranged in the same plane and a third terminal is arranged midway between the outer terminals and has a contact portion which is spaced slightl... | 02/21/1978 |
| 4053938 | Temperature sensing transformer primary switch A temperature sensing transformer primary switch for a distribution transformer, the switch being mounted within the distribution transformer below the level of the dielectric fluid and being manually operable externally of the transformer for opening the... | 10/11/1977 |
| 4020442 | Composite-type heat-system fire sensing device Disclosed herein is an improved composite-type heat-system fire sensing device consisting essentially of a differential sensing element and constant-temperature sensing element, capable respectively of actuating a pair of electric contacts. These two type... | 04/26/1977 |
