Abstract: A pointer intended for attachment to the digging arm of an excavator, is characterized by an elongated arm which can be pivoted on the digging arm using a drive whose driving movements are activated and controlled by the magnetic field generated by an underground cable, conduit or like conductor in a manner such as to cause the pointer to point towards the cable, conduit or like conductor independently of the position of the digging arm.

Abstract: Electronic switch comprising an operating means (1;7;12;15;18) movable in the switch. The operating means has only one magnetic pole operative for its motion, said pole being arranged to coact without contact with at least one second magnetic pole of a second magnet (5;5a) placed in the switch.

Abstract: Electric relay comprising one or more relay tongues, a relay contact cooperating with the respective tongue and an electromagnet actuating the respective tongue. A relay tongue unit (3) is then integral with at least one relay tongue (4), which has in one part an area reducing cross sectional dimension and is formed at its end opposite to the free end with a material cut portion (23) serving as an electric fuse. The surface of the relay contact (6) cooperating with the contact point (5) of the relay tongue is movable to a limited extent relative to this and, moreover, the electromagnet (9) actuating the relay tongue (4) consists of two composite iron plates (31, 32) electrically insulated from each other which have each, insulated from each other, an electric connection (34) integral with the iron plate, the coil (37) fed by the operating current of the electromagnet (9) being connected with one of its conducting ends (38) to one iron plate (31) and with its other end (39) to the other iron plate (32).

Abstract: In a relay tongue unit intended to be included in an electric relay the unit comprises at least one tongue unit in the form of a resilient sheet consisting of an attaching member, which comprises a main portion (1), a fuse portion (2) and a transition portion (3), and a tongue portion (4). This has at its free end a contact (5) and a resistance portion.

Abstract: The invention relates to a device for adjusting the backrest, preferably of vehicle seats. It is characterized by a first plate-shaped portion, which by a belt-like member is connected to a rigid part of one lateral edge of the seat back, and a second plate-shaped portion, which by a belt-like member is connected to a rigid part of the second lateral edge of the seat back. The plate-shaped portions are located with their plane sides facing to each other, and a spring means is provided to stretch the belt-like members between the lateral edges. A holder-on member is located outside the plate-shaped portions and receives a means intended as desired to press the plate-shaped portions into locking engagement with each other and, respectively, with the holder-on member.

Abstract: A cushion member for sound-insulating and air-tight sealing, which cushion is to be attached substantially along the edge of a first surface, which at this edge is connected via the cushion with another surface, which need not have a form absolutely conforming to the first surface at the connecting surface and need not be smooth. The cushion consists of an elongated casing filled with balls of plastic material and with a cylindrical cross-section of soft, flexible and air-impervious material and it is adapted to be attached to the first surface.