Unloading reverse electric closures are the opposite of electric closing clamps. Arranged almost the same, but they work when the load is removed from the contactor, under the action of the released spring, the contacts close.
Home-made unloading reverse electric trap locks, design and installation features.
Unloading reversible electric closures-extensions can be an analogue of a mechanical fuse, where the firing pin does not pierce the capsule, but closes the circuit. Easier to manufacture are contactors in which, when tensioning the filament, the contacts shift or the dielectric disconnecting the contacts is removed. An unloading option of the contactor is possible, which is triggered by loosening the tension, breaking or untying the rope. A combined fuse is also possible, triggered both by tension and by loosening the rope.
The desire to control two stretch marks created a contactor with a T-shaped rotating element. The figure below (diagram 1) shows the device of the unloading contactor, diagrams 2-6 show the devices of standard fuse-links in tension, in which the firing pin closes the contacts instead of piercing the capsule. Diagrams 2-4 show the same type of device that is triggered by pulling out the studs (diagram 2), checks (diagram 3), tilt collet (diagram 4).
The fifth diagram shows a collet device that works both from tension and from the weakening of the stretch. In the sixth diagram, a contactor with a “T” shaped hammer, triggered by the tension of either of the two extensions. Scheme 7 is a simplified version of Schemes 2 and 3. Scheme 8 is a variant of Scheme 5; a variant that works only when tension is pulled or released is possible. Schemes 9 and 12 duplicate scheme 6. Schemes 10 and 11 duplicate schemes 2, 3 and 7.
The design 10 is flat, based on the fact that the L-shaped metal plate, strip or plate is drawn between the conductive elements, and the structure 11 is obtained from two wires with stripped ends wound on opposite wires end-to-end. Constructs 13 and 14 are identical in principle of action. The thirteenth is made of clothespins with ends wrapped in bare wires.
Unloading reverse electric locks on schemes 14-23.
The fourteenth of two elastic metal plates with a dielectric gasket. The design resembles tongs for cakes or a darkroom. In both cases, when triggered, they pull out wedges or a plate of insulating material. The fifteenth design is made from a mousetrap, a variant with a wooden base is shown. With a metal, a current-insulating lining, for example a piece of paper, is placed under the contact plate. If instead of a lowering sill a hook for a stand is used, then the design will turn out even better.
Figure 16 shows the contactor, which is a metal tube, closed at one end by a cork. A nail passes through the cork, when the nail is tilted to either side, its head touches the tube wall – closure occurs. Stretching can tilt the nail, they can simply touch it with the foot or the bottom (boats, cars, etc.), if the contactor is laid horizontally, the mine cover can push the nail.
The seventeenth diagram shows a contactor consisting of a current-insulating sleeve with two contacts inserted into it, this sleeve is partially filled with dry electrolyte (current does not conduct). The top of the sleeve is closed by a stopper with a pin sticking out of it; when the pin is touched, the tightness of the stopper is broken and water enters the sleeve and mixes with dry electrolyte.
Further, the contacts either close, or the whole structure turns into a galvanic cell (if the contacts are made of different metals and have a relatively large surface). It is advisable to pre-calcine the dry electrolyte in order to remove crystallized moisture. As the electrolyte, you can use any salt, table, vitriol, soda, etc., soluble alkali, or soluble acid. It is possible undiluted sulfuric, with iron electrodes and dry alcohol (urotropin) as an inhibitor.
A variant of the contactor with breaking ampoules is possible. The contactor case, made in the land version, is placed in a container with water, the diagram shows the contactor for a coastal anti-airborne mine. Often in the manufacture of improvised explosive devices, the fuse is made at the same time with the body, making the task as easy as possible. It is possible to manufacture contactors on a wire break (connection according to the above diagram), breaking a fiber or crossing a laser beam (instead of a broken wire, an LED).