...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 |
| 7232971 | Circuit breaker A circuit breaker includes a shell, a movable press strip, a metal strip, a C-shaped plate spring, and three conductors. A first and a second conductor are inserted through the bottom of the shell, respectively have an upper end extending up in the shell, with a fir... | 06/19/2007 |
| 7196280 | Miniaturized electric switch A switch (10) comprising a bottom contact-holder (12) supporting two fixed electric contacts (30, 30B), an actuation member (54) and an intermediate conductive contact strip (14) that can be deformed elastically in order to modify ... | 03/27/2007 |
| 5947270 | Reset switch with controlled force strength snap-over A nonrecycling reset switch has a fixed position anchor mounted on bosses in the casing for holding a resilient member of the conductive snap spring which moves between open and closed positions. A leaf spring or other resilient member is anchored adjacen... | 09/07/1999 |
| 5239151 | Leaf switch The invention relates to a leaf switch having a scroll spring (6) which can be hooked between a switching are elongate windows which extend in the transverse direction and into which centrally projecting tongues (3a, 2a) of the switching tongue (3) and of... | 08/24/1993 |
| 5082997 | Quick-break miniature switch Switch of the tilting blade type wherein the spring blade (35) provides for the tension of the moving blade (38) and the return of the pusher (39); under the action of the pusher(39) the spring blade (35) separates progressively from the inclined terminal... | 01/21/1992 |
| 5079394 | Snap action switch and contact therefor The switching unit of a snap action electric switch employs a contact of the type called mainplate and having a circumferentially complete frame with a substantially diametrically extending blade. The frame has two lugs which flank the median portion of t... | 01/07/1992 |
| 5016140 | Switch arranged for being mounted on a circuit board For the purpose of mounting a switch on a circuit board and of actuating the switch, it is proposed that the biassing spring biassing the wiper into a first above dead-center position be pivoted at the same main mounting part on which the wiper is support... | 05/14/1991 |
| 4692572 | Over-center actuator switch An over-center actuator switch assembly includes a U-shaped bracket having a plurality of similar switches mounted in side-by-side relation between the flanges of the bracket. Each actuator has a depressible operator extending into the bracket. An operati... | 09/08/1987 |
| 4479039 | Electrical switch construction and method of making the same An electrical switch construction and method of making the same are provided, the construction comprising a housing, a pair of electrical switching units carried by the housing, and a condition responsive actuator carried by the housing and being operativ... | 10/23/1984 |
| 4283609 | Electrical snap-action switch Snap action switch with a sheet metal spring divided by slots into two or three coherent strips, one of which is shortened by way of bending. The bending is effected by clamping the strip between abutments formed by the upper and lower part of the housing... | 08/11/1981 |
| 4220835 | Electrical switch construction An electrical switch, comprises, a casing of a nonconductive material, having first and second spaced apart upstanding supports, with a contact plate of an electrically conductive material having an intermediate spring portion, with an outwardly extending... | 09/02/1980 |
| 4118609 | Electrical snap-action switch A flat snap-action push-button switch comprising a sheetmetal spring with two elongated slots dividing the sheetmetal member into three coherent strips, is disclosed. The center strip is extended beyond the point of junction of the strips, and carries con... | 10/03/1978 |
| 3958091 | Snap-action electric switch, and contact blade structure therefor In a snap-action electric switch, and a contact blade structure therefor, the contact blade of the contact blade structure is constituted by an actuation portion of approximately hollow rectangular form having two spaced limbs, a web at one end of the con... | 05/18/1976 |