1、MIL-C-21679 13 7779706 0431386 5 h -4 1.1 IL-C- 216 79 (N Or d ) 1 I MILITARY SPECIFICATION CD-10 MOD 1 MECHANISM 30 Non3uibaP 19% SUPERSEDING NAVORD OS 2848H 19 December 1956 1. SCOPE 1.1 This Specification establishes the requirements for the procurement of the clock-delay, CD-10 Mod 1 Mechanism.
2、The mechanism, which is used to control. underwater mine circuits, is a manually-wound, spring-driven clock with two normally open electrical switches which operate in sequence. 2. APPLICABLE DOCUMENTS 2.1 The following specifications, standards, drawings, and publications of the issue in effect on
3、date of invitation for bids, form a part of this specification. SPECIFICATIONS MILITARY MIL-S-6872 Soldering Processes, General Specifications for. STANDARDS MILITARY MIL-STD-105 Sampling Procedures and Tables MIL-STD-129 Marking for $hiPrnent and Storage. for Inspection by Attributes. Provided by I
4、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-21b77 13 777770b 0431387 7 I 3. REQUIREMENTS DRAWINGS 3.1 General reauirements. 3.i.i The clock delay, CD-10 Nod 1 Mechanism, shall be manufactured in accordance with LD 166774 and all documents I I listed the
5、reon. BUnEAU OF ORDNANCE - LD 166774 CD-10 Mod 1 Mechanism. LD 284699 Container, Inner, for Clock Delay Mechanisms. LD 284862 Container, Outer, for Clock Delay Mechanisms. 1476194 Marking Instructions for Storage and Chipping Containers. And all documents listed in the above LDfs and drawings. PUBLI
6、CATIONS . BUREAU OF ORDNANCE NAVORD OP 400 General Instructions for Design, Manufacture and Inspection of Naval Ordnance Equipment. (Copies of specifications, standards, drawings and pub- lications required by contractors in connection with specific procurement functions should be obtained from the
7、procuring activity or as directed by the contracting officer.) 3 J.2 The requirements and procedures established in OP 400 shall be complied with as applicable, 3.1.3 . Premoduction samle. - Unless otherwise speci- fied in the contract or order, a preproduction samde shall be manufactured by the sam
8、e procedures and processes and at the same location as proposed for full production. This sample will be tested for the purpose of determining com- pliance with the requirements of this specification, the drawinps, and the contract, See 4.1.2. 2 Provided by IHSNot for ResaleNo reproduction or networ
9、king permitted without license from IHS-,-,-MIL-C-21677 13 3739706 0431388 7 f- MiL-C-21679 (Nord) 3.1.4 Interchanpeability. - Component parts of assembled units (unless otherwise specified on the anplicable drawings) fabricated in strict agreement with their applicable draw- ings shall be interchan
10、geable and shall assemble with mating components of the unit without selection or fitting. If, during assembly of the fabricated parts of a unit, selection or fitting is required and changes in dimensions are necessary, no changes in the parts as delineated on applicable drawings shall be made witho
11、ut prior approval of the Bureau of Ordnance. 3.1.5 Conflicting requirements. - Conflicting require- ments arising between this specification and any other speci- fications, publications, or drawings listed herein shall be referred in writing to the procuring agency or appointed agent for interpretat
12、ion and clarification. Performance requirements and moduct characteristics. The mechanism covered by this specification shall meet the following performance requirements and product characteristics. 3.2.1 Solderinq. - Unless otherwise specified, solder- ing processes shall conform to the requirement
13、s specified in Military Specification MILOS-6872, Electrical connections shall be mechanically secure before soldering wherever possible, Only rosin flux containing no acid shall be used. rosin-core solder is permitted. been tested and accepted, shall be used to lubricate the Mainspring-and the Gear
14、 Train, 3.2 The use of 3.2.2 Lubrication. - Special purpose oils, which have See 6.2 and 6.3, 3.2.3 Assembls nuts, - Before tightening the nuts which secure the case, the nuts for the pillar studs which pro- trude from the bottom plate shall be secured with a torque of 10.5 I.5 pound-inches. CAUTION
15、: These nuts should not be loosened until the mechanism is ready for final assembly on a clock starter . All other No. 8 nuts shall be secured with a torque of 10.5 k.5 pound-inches with the exception of the cover retaining nuts which shall be secured with a torque of 4.5 *5 pound- inches. See 4.6.1
16、.2, CornDonents* - The following specific requirements apply to the indicated components. 3,2.4 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2L677 13 m 7777706 0431387 O m * 3.2.4.1 Switches. - The switches shall comply with the 3.2.4.i.i
17、Contact clearance. - Vhile the switches are following requirements, when tested as specified in 4.6.2.1. in the open position, the clearance between the contacts of the A switch shall be 0.031 to 0,050 inch and between the con- tacts of the C switch shall be 0.031 to 0,090 inch. 3.2.4.1.2 Contact fo
18、rce. - %en the switches are in the open position, the inner contact arm assembly of each switch shall exert a force between 100 and 350 grams against the cam, and the outer contact arm assembly of each switch shall exert a force between 100 and 300 grams against the reinforcing angle. When the switc
19、hes are in the closed position, the con- tact force of each switch shall be not less than 60 grams. 3.2.4.1.3 Contact resistance. - With the switches in the closed position, the resistance of each pair of contacts shall not exceed 0.1 ohm at the contact arm terminals. When measured at the terminal l
20、ugs of the cable assembly, the re- sistance throUgh each switch must not exceed 0.2 ohm. 0.001 inch gap between pillars and the bottom plate when measured before securing the case. Measure as specified in 4.6.2.2. 3.2.4.2 Bottom plate assembly. - There shall be less than 3.2.5 Completed mechanism. -
21、 The following requirements apply to the completed mechanism. 3.2.5.1 Insulation resistance. - Vhen tested as speci- fied in 4.6.3.1, the insulation resistance shall be not less than 50 megohms: tacts when in the open position. (a) Between the contact springs of each pair of con- (b) Between each co
22、ntact spring and all other contact (c) Between each contact sprir,g and the frame of the 3.2.5.2 Operation. - In any position, the mechanism springs . me chanism. shall operate as required by this specification. Testing shall be as specified in 4.6.3.2. 4 Provided by IHSNot for ResaleNo reproduction
23、 or networking permitted without license from IHS-,-,-MIL-C-21679 13 H 9799906 0931390 7 = / i 3.2.5.3 Verge adlustment. - The verge shall be ad2usted to provide the same amount of drop between the corner of the incoming pallet and the escape wheel tooth as there is be- tween the corner of the d.epa
24、rting pallet and the escape wheel tooth. Adjustment and testing shall be as specified in 4.6.3.3 . 3.2.5.4 Lockinn and startinq. - The mechanism shall op- The mechanism shall operate when the erate when the stop lever is depressed by a force not greater than 2 i/4 pounds. stop lever is 0.095 inch fr
25、om the bottom plate and shall stop when the stop lever is 0.200 inch from the bottom plate. Test- ing and measuring shall be as specified in 4.6.3.4, 3.2.5.5 Timinq. - F!ith the.clock in any position, the two switches shall hav the following timing sequene as tested at the end of the clock cable. (a
26、.) (b) Switch C shall close in 170 minutes 10 percent. Switch A shall close in 60 minutes * 10 percent and shall open 4 f 2 minutes later. The over-run time of the mechanism after the operation .of the last switch shall be not less than 18 minutes. Ciritch C shall remain closed and switch A shall re
27、main open after the mechan- ism has run down. Compliance with timing requirements shall be determined as specified in 4.6.3.5. 3.3 Environmental remirements , 3.3.1 TemDerature. - Mechanisms covered by this speci- ficatioh shall be subjected to temperature conditions, for storage and operation, and
28、tested as specified in 4.7.1. Thereafter, the mechanism shall meet all performance require- ments and product characteristics of this specification. 3.3.2 Vibration. - Mechanisms covered by this specifi- cation shall be mounted and vibrated as Specified in 4.7.2 and thereafter shall show no damage a
29、nd shall meet all per- formance requirements and product characteristics of this specification. 3.3.3 Mechanical shock. - Mechanisms covered by this specification shall be subjected to the shock test as speci- fied in 4.7.3, and thereafter shall show no damage and shall meet all performance requirem
30、ents and product characteristics of this specification. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-21679 13 m 7997906 043L331 7 m 1IIL-C-21679 (Nord) 3.4 Workmanship and cleanliness. - The mechanisms shall be free from dust, dirt, metal
31、filings, moisture, solder splashes, chips, and other foreign matter Necessary .pre- cautions shall be taken during manufacture and assembly to insure.these conditions. 4. QUALITY ASSURANCE PROVISIONS AND TEST, REQUIREMENTS 4.1 Government inspection. - The Government inspector will make such inspecti
32、ons as are necessary to determine that all components and assemblies are in accordance with the requirements of the contract, pertinent specifications and drawings. Unless otherwise specified, these inspections will be conducted in accordance with instructions contained in OP 400. 4.i.i SamDling. -
33、Unless otherwise specified, and when applicable, the sampling plans and procedures used by the Government inspector in the determination of the accept- ability of products submitted by a suriplier for Government inspection will be in accordance with the provisions of NIL-STD-105. 4.1.2 Preproduction
34、 sample . - Unless otherwise speci- fied for each contract or order, a representative sample of 24 mechanisms shall be manufactured using the methods and procedures proposed for full production. The Government in- spector shall perform, witness or participate in such in- spections and tests on the s
35、amples as are required for full production. Unon conditional acceptance by the inspector, the preproduction sample shall be forwarded, together with a report of inspection, to an activity designated in the con- tract or by the procuring agency, for the purpose of deter- mining compliance with the re
36、quirements of the contract, specifications and drawings. Further production of the item by the contractor prior to approval of the contracting activity or the completion of the tests on preproduction samples shall be at the contractors risk. Preproduction samples accepted will be applied as part of
37、the quantity specified by the contract or order. 4.1.2.1 Preproduction samDle for a subsequent contract The necessity for a preproduction sample will be determined by the procuring agency wh-en production under a new contract by the same contractor at the same .location followc: the manufacture of s
38、atisfactory material as covered by this document. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-21677 13 m 7977706 Oq33372 O m / 9 4.1.3 - Lot. - As applied to the Government inspection of units of Droduct, the term I1lotf1 shall mean tlins
39、pection lot“, 1.e. a collection of units of the product used as a basis for Government inspection. the number of units of product in lfinspection lotsft shall be as determined by the Government inspector, and may differ from the quantity designated in the contract or order as a lot for production, s
40、hipment, or other purpose. 4.1.4 Periodic oroduction samnles. - Unless otherwise specified in the contract or order, from each five hundred (500) successively produced mechanisms, a random sample of three (3) mechanisms will be selected by, the Government in- spector for submission to a Bureau of Or
41、dnance assigned act- ivity to determine compliance with the requirements of the contract specification and drawings. For less than. five hundred (500) successively produced mechanisms the sample size shall be in accordance with standard MIL-STD-105 Appendix, Inspection Level L-4. The mechanism will
42、be considered satis - factory if the mechanism meets all specifications and perti- nent drawing requirements, and withstands the tests as speci- fied in 4.6 and 4.7 inclusive. The failure. of a mechanism to comply with any of the environmental test requirements shall result in the cessation of Gover
43、nment inspection until the manufacturer h.a-s corrected all deficiencies in the production process. At the discretion of the procuring activity such a failure may result in the rejection of the material repre- sented. The manufacturer may resubmit rejected lots, sub- sequent to the completion of sat
44、isfactory corrective action as determined by the procuring activity. shall be conducted in accordance with rovisions of “Inspect- 4.3 Classification of tests. - The inspection and test- Unless otherwise specified, 4.2 Contractors insectioq. - Contractors inspection ion by Contractor“ as contained in
45、 OP t OO. ing of mechanisms covered by this document shall be classi- fied as follows: , (a) Acceptance tests. (b) Preoroduction tests. (c) Periodic production tests. 4.3.1 AcceDtance tests, - Acceptance tests for accept- ance of the mechanism shall consist of tests to determine compliance with all
46、requirements specified in this document except the environmental criteria. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-21b79 13 = 9999906 OLI31393 2 MIL-C-21679 (N Ord) 4.3.2 Preproduction and period.ic production tests . - Preproduction
47、 and periodic production tests are those per- formed on samples submitted in accordance with 4.1.2 and 4.1.4 to determine that the lot and production meet all the requirements of this specification. Acceptance shall be based on no defects in a sample. Acceptable preproduction and periodic production
48、 sample units, shall not be released for service use and shall be stamped or marked as follows: llSample - Not for pervice Use“. 4.4 Test eauipment. 4.b.i Test and inspection eauipment and facilit-. - Unless otherwise specified, the manufacturer shall furnish and maintain all necessary test equipmen
49、t, facilities and personnel for performing all acceptance tests under the supervision of the Government inspector. The test equipment shall be adequate in quantity, and unless definite require- ments are specified, they shall be of sufficient accuracy and quality to permit performance of the required accept- ance tests. 4.4.1.1 Equipment required for performing the electri- cal tests is as follows: (a) Test Set Mark 95 Mod 1 or
