Abstract: A front seat for a motor vehicle comprises a seat frame (10) and backrest frame (11), lower fixing means (12, 13) for rigidly fixing the backrest frame to a lower structural element (2) of a passenger compartment, and upper fixing means (15) for rigidly fixing an upper part of the backrest frame to an upper structural element (17) of a passenger compartment.

Abstract: The inventive seat for a motor vehicle comprises a cushion (8), a lower connecting device (13) for connecting the cushion to the lower element (2) of the vehicle structure and a backrest (9), said seat being designed in such a way that the position thereof is ergonomically adjustable. The seat also comprises another upper connecting device (16) for connecting the upper part (15) thereof to the upper element (17) of the vehicle structure, the upper connecting device (16) forms an upper connection which makes it possible to ergonomically adjust the seat position.

Abstract: A depth measurement system particularly suitable for automatically driving a recorder under varying wireline measurement conditions for repeatedly depth recording measurements from borehole tools produces different measurements at generally the same point on the wireline which would correspond if measurement conditions were ideal, but are subject to non-repeatable variations. Accordingly, these signals are automatically utilized to provide a repeatable signal. In one form, the signals correspond to magnetic marks and to incremental movement of the wireline, the latter produced by mechanically coupled devices subject to slippage, variations in circumference, etc. The incremental signals are counted and compared with the number expected for such intervals, a low count indicating slippage or the like and used to provide an appropriate alarm and/or an automatically slippage corrected signal particularly suitable for driving a recorder.