1、MILCL11232 (OD) 21 June 1951 MILITARY SPECIFIC!IOH CARTRIDGZ, PHOICOFLASH, PRBCTIGE, Ml21 ASSEMBLING, MBBHING, AM) PACKING 1. SCWB 1.1. %!his specification covers assembling, marlring, and packing of the M121 practice photoflash cartridge. 2. bpFLIDILBL3 jPECIF1CATIONS AND DBBWINGS 2.1 9i3ecificatio
2、ns. - All specification referenced on drawings specified in 2.2, of the issue in effect on date of invitation for bids, form a part of this specification. or as directed by that agency. Both the title and identiying mber or symbol should be stipulated when requesting .copies.) (Copies of specificati
3、ons ah apparatus shall include a. resistance meteF cegable of measuring resistmce +n the O to II ohni range to within 0.05 ohm. The meter shall be connected across the lead wires of the test appara,tus shown on figure 1. The contact resistance shall be determined to the nearest 0.05 ohm under the sa
4、me conditions in the test apyaratus as in the acceptance tests by substituting the smooth flat suriace of an aluminum block (figure 2) for the cmtridge base and primer electrode. be determined periodically by the inspector. The current flow in the resistnce under test shall not exceed 10 milliampere
5、s. During the test precautions shall be tsken to prevent incluctive voltcges that might cause ignition of the primer, 4.4.2 Procedure. - The electrical resistance of emh cartridge shall be measured after the Frimer is sealed and assembled in the cartridge case but before the propelling charge is ins
6、erted. measured between the central electrode of the Trimer and the base of the cartridge case ancl shal not include the conbact resistmce of the test. sidered acceptable only if its electrical resistance meets the requirement of The contact resistance shall The resistance shall be 4.4.3 Acceptance.
7、 - A cartridge (less prnelling chagge) shall be con- 3-40 4.5 Determination of waterproofness, rocedure. - Submerge 15 cartridges from each lot horizontally in water 4*5*1 at ?Oo e7- 10F to a depth of nok less than 6 inches nor more than 9 inches over the flmge of the cartridge case. At the end of 2
8、 hours remove the cartridges and wipe the outer surace dry. Within one hour after their removal disassemble the cartridges and examine their inner parts and surfaces for evidence of moisture. no indication of moisture on the inner -parts and surfaces of army of the 15 cartridge assemblies examined.
9、- tractorls request provided that, in the original test, not more than one cartricge shows evidence of leakage. after retest if none of the 25 cartridges show evidence of 1.eaicage. 4.5.2 Acceptcuice. - The lot shall be considered acceptable if there is 4.5.3 Retest. A retest, using 25 cartridges, m
10、ay be mae at the con- The lot shall be considered acceptable 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - ,- _- 1.lIL-C- 11232 (om) 4.6 Proving mound test. 4.6.1 Proced.me. - Fire 30 smple cartridge assemblies from the pro- jector for which t
11、he cartridge is standard. in a suitale holding fixture set up on the ground, and shall .be fired zt an elevation of 45O. test in accordance with table I. The protector shall be mounted Score the results of the proving ground tests and e- TABU I - Method of Scoring Give each cartridge fired a score o
12、f 100 minus such deductions as are merited: Contingen and, shall. not be repoduced either wholly or in part except when authorized in connection with Rovernment procurement, no? be used for any othsr purpose except when specifically authorized by the Chief of Ordnance. Custodian: Army- Ordnance Corp
13、s. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RADIUS EQUALS ONE-HALf: THE WIDTH. 1- 1.?2+*01 -4 I -14 H HOL ES & DIAM. PLATE, FRONT al 64(NOt8 32 N C 2 .3-HOLE Q EQUALLY SR4 CED. STEEL 1.568 -.O10 ,* b% 45 CHAMFER / DIS, CONTACT SIE& FIG. 2 El LOCK Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
