Boulenge chronograph

Velocities of detonation were first measured by Berthelot and Vieille,4 who worked first with gaseous explosives and later with liquids and solids. They used a Boulenge chronograph the precision of which was such that they were obliged to employ long... 

Chromatographic Adsorption Apparatus Electrical Connections of Le Boulenge Chronograph Schematic Diagram of Aberdeen Chronograph Camera Chronograph... 

Di(picrylthial)-xylene instead of Di(picrylthiol)-zylene Boulange, Le Chronograph instead of Boulenge, Le Chronograph... 

Boulenge(Le),Chronograph. Employed in early methods for measuring the vel of deton of expls. 

A. Boulenge (Le) Chronograph. This instrument, listed (but not described) in Vol 2, pB258-L, was developed in France in 1866. Because of its simplicity and low cost, it is still used, especially in testing small arms. It is fairly accurate when short intervals of time are involved. A schematic presentation of apparatus and equipment such as has been used in some US Ordnance installations is given in Fig... 

Following is a brief description of screens a. Bouleng (Le) Screen, A flat frame on which is strung a continuous wire making vertical passes separated by small intervals. The ends of the wire are connected to, and are part of, the chronographic circuit. Passage of the proj thru separated screens breaks the wire and interrupts an electrical circuit in each case. This and the Aberdeen Screen (See below) are contact screens, because they function only on contact with proj (Ref 9i pll3 Ref 28, p68 Ref 49, p3)... 

---