Arming designs

Pedersen Device. An invention of the US arms designer J.D. Pedersen, this was a noteworthy ordnance secret of WWI. It consisted of a receiver unit that could be locked into the receiver of a Springfield or Enfield rifle. Installed, it converted the rifle into a semiautomatic weapon that fired. 30 cal pistol-type cartridges from a 40-round box magazine. To hide its identity, the mechanism was officially listed as the US. 30 cal automatic pistol Model 1918. The system was dropped after the war Ref J. Quick, Dictionary of Weapons and Military Terms , McGraw-Hill, NY (1973), 342... 

Taylor, J., Solid Propellent and Exothermic Compositions. Newnes, London, 1959. Whelen, Col. T., Small Arms Design and Ballistics. Small Arms Technical Publishing Co., Plantersville, S. Carolina, 1945. 

Plasticity-Damage Multiscale Modeling Example of Automotive Cadillac Control Arm Design... 

Figure 18-91 illustrates three types of rake-arm designs. The conventional design typically is used in bridge-supported units, while the dual-slope design is used for units of larger diameter. The thixo post ... 

FIGURE 13 Typical conical screen mill impellers (1609) (A) square arm design, (B) round arm design. 

The basic geometry of impellers can be altered to provide flexibility for specific applications. As an example a square arm impeller with a positive leading edge (Fig. 13) applies higher shear action to size reduce but unlike the standard square arm design, results in higher fines, increased product retention time and lower capacities (Fig. 14). 

The cable arm design uses cables attached to a truss above or near the hquid surface to move the rake arms, which are hinged to the drive structure, allowing the rakes to raise when excessive torque is encountered. A major advantage of this design is the relatively small surface area of the raking mechanism, which reduces the solids accumulation and downtime in applications in which scaling or island formation can occur. 

Fig. 36 Design of mechanophores in star-shaped polymers (a) core design, (b) interface design, (c) arm design, and (d) combined interface design and arm design...

Arms are to be designed as compact and lightweight as possible. Arm design is to put the operator as close to the point of operation as possible. 

Single-axis arm designed with an ultrasonic motor basic active/passive joint torque control... 

---