SE443673B - SENSOR FOR SENSING POSITION CHANGES - Google Patents

Abstract

The invention relates to a detector intended to detect the changes in position of an element 15 closing off an opening let into a wall 17, such as a window or a door. According to the invention, the detector comprises an elongate flexible part 11 which is equipped with holes and one end of which is fixed to one 15 of the parts 15, 17 which are movable with respect to one another, while the opposite end extends through a slot 18 let into a detector element 19 which is arranged on the other part 17, an actuating member in the shape of a finger 22 arranged in this detector element 19 interacting with the said elongate part in such a way as to take up a first position in which this actuating member 22 extends through one of the holes 21 of this elongate part 11, or also a second position in which the front end of this actuating member 22 comes into abutment on this elongate part 11, this actuating member 22 forming part of an alarm device which is triggered when this actuating member takes one of its two positions. The invention finds an advantageous application in houses and caravans. <IMAGE>

Claims (6)

If someone now tries to get in through the partially open window by further pushing it up, the plastic strap 11 will be displaced laterally, the edge of the tail 21 pressing down the contact pin 22 and the microswitch 20 will assume its opposite, in fig. 2 position shown. The microswitch will then close its contact, which means that an alarm is given. P a t e n t k r a v A sensor (10) arranged to detect position changes of a means (15) intended to close an opening in a wall (17), such as a window or a door, which means is in a position where the opening is not completely closed, k characterized in that it comprises an elongate flexible part (ll) provided with a hollow (21), one end of which is fixedly arranged on one (15) of the two mutually movable parts (15, 17) and whose other end runs in a slot (18) in a sensor part (19) arranged on the second part (17), in which a pin-shaped actuating means (22) for an alarm device is arranged to assume a first position in which the actuating means (22) extends through a of the tail (21) in the elongate part (11) and a second position in which the front part of the actuating means (22) abuts against the elongate part (11). 2. A sensor according to claim 1, characterized in that the elongate, flexible part (11) is constituted by a strap. 3. A sensor according to claim 2, characterized in that the strap is made of plastic material. in A sensor according to any one of the preceding claims, characterized in that the pin-shaped actuating means (22) consists of a pin connected to the movable contact in a microswitch (20). 5. A sensor according to any one of the preceding claims, characterized in that the alarm device is arranged to emit an alarm when the actuating means (22) is in the second position. A sensor according to any one of the preceding claims, characterized in that the closing means (15) is a window, one end of the elongate, flexible part (11) being attached to the window (13) by gluing or the like. while the sensor part (19) provided with a slot (18) is fixedly arranged next to the opening.