The U. S. Army's new M19 binocular. which incorporates an unusual modular assembly concept for simplified maintainability, is currently being produced at the rate of 2,000 per month.In this paper, the origin and development by the Army of the modular concept for this binocular are reviewed briefly and performance requirements are summarized. Following this, the manufacturing engineering approach and implementation developed and carried out by the Optics Division of Bell & Howell Company in producing the M -19 binocular are presented. GENESIS OF THE M19 BINOCULARDuring the second World war, the U. S. Armed Forces invested heavily in the purchase of binoculars. Unofficial surveys indicate that over 400,000 6 X 30 and 7 X 50 instruments were purchased from mobilization suppliers. These binoculars were primarily adaptations of commercially available instruments, with only minor changes, such as the addition of a reticle, made to address military utilization. The rapid expansion of binocular inventories ceased at the end of the war and only a few thousand new instruments were since purchased.The Korean conflict witnessed the utilization of World War II instruments.Four major issues were raised by wartime experience; they were: weight, size, mechanical reliability, and maintainability. Improvements were made to enhance the watertightness of the three primary binocular models but studies, conducted in 1955, concluded that no major reduction in size or weight was possible within the existing configure ion.Therefore, in 1956, the U. S. Army authorized the development of the T14 Binocular . The program objective was, and we quote, to "redesign the standard 7 X 50 M17 Binocular and reduce its weight and bulk without impairing performance." This simple statement initiated the development of the present, sophisticated M19 binocular.It was recognized from the beginning that the stated design goals did not address two of the more glaring problems, namely reliability and maintenance.The two most prevalent reliability failure areas were sealing integrity and interpupillary hinge wear. The maintenance problem had its basis in the quantity of individual spare parts, approximately 250, and special tools, approximately 125.The concern for a design more compatible with maintenance was further spurred by the facilities and personnel concerns and the fact that a binocular failure effectively removed the instrument from use for a period of three to six months.Three alternatives were, therefore, subjected to both technical and financial analysis.They were:a.Design a new binocular which required piece part maintenance but which met the size and bulk dictates and incorporated greater ruggedness and sealing capability.b.Design a totally new binocular which could be economically discarded at failure. Reliability would be traded -off against cost to provide optimum financial return. Such a unit could be very effectively sealed after assembly and adjustment.c.Design a totally new binocular which would be maintainable with the absolute minimum n...
The following report reviews a technical paper that details the U.S. Army's efforts to design and produce a modular binocular for military use following WWII.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.