CONTACT WELDING IN WIRE SPRING RELAYS 923 



ACKNOWLEDGMENTS 



It is not possible to give due credit to all engineers who contributed 

 to the development of these welding machines and to the preparation 

 of this paper. Particular mention, however, will be made of II. Beedy, 

 D. R. Brown, R. L. Kessel, G. A. Mitchell, J. M. Roach, J. P. Seider, 

 R. Spillar, and the late Dr. B. J. Babbitt who, as Western Electric 

 development engineers, engaged in various phases of this investigation. 

 In addition to acknowledging the part played by numerous Bell Labora- 

 tories engineers, I desire especially to express my appreciation to D. C. 

 Koehler and J. J. Madden for their able assistance while loaned to West- 

 ern Electric during the early stages of the percussion welding study. 



