Drawings and pictures from our archives inherited from Gouda:
 

Mechanical CPT cone, dated 1934	Duth cone, dated 1950	Drive head	Hydraulic measuring head, dated 1934	First manual pusher: Measuring head and Drive head (Barentsen)

10 ton manual pushers
Jan de Jong and Piet Tuynder, in the fifties		Gerard Frieling and Jan Spieringhoek at the pusher

Anchoring and Oldies
Anchoring with wooden beams buried at the bottom of a pit (not dated)	CPT test by Delft Grondmechanica, approx 1945	Mr Barentsen's first pusher	Driving soil anchors, as today. 10 ton pusher

2 ton pushers, manually driven
Stand alone pusher	Same in an early electric CPT test

CPT expedition in Nigeria

At Gouda
Production of Trolley Mounted pushers	Design team at  Gouda in 1963: Ari van den Berg, second from the right	Ben Rabouw (not related to our Piet Rabouw) with a 2 ton pusher

10 ton hydraulic pushers
Delft Grondmechanica: 10 ton pusher on trailer	On Trailer	Same	On trolley	Jan Spielingshoek at the pusher

First 20 ton trailer at Gouda, 1948	17.5 ton Trolley	20 ton Trolley