1、MIL-B-7525B -. 1. SCOPE r MILITARY SPECIFICATION 29 January 1971 SUPERSEDING MIL-B- 7 5 25A (USAF) 3 October 1957 MIL- B-7 526B( USAF) 22 October 1957 MIL- B-7 5278 (US) 22 January 1958 MIL- B- 7 5 28 B (USAF) 22 Oct 1957 BRACKET AND RECEPTACLE, HOT CUP, AIRBORNE This specification is mandatory for
2、use by all Departments and Agencies of the Department of Defense. 1.1 Scope. This specification covers four types of hot cup brackets and receptacles to be used aboard aircraft with hot cups conforming to MIL-H-21303. 1.2 Classification. ing types as specified (see 6.2). Hot cup brackets and recepta
3、cles shall be of the follow- -.a Type A-1 Type A-2 Spe 8-1 Type B-2 4-Cup unit, 28 Volt6 (see fig 1 and 2) 1-Cup unit, 28 volts (see fig 5 and 6) 4-Cup unit, 115 volts (see fig 3 and 4) 1-Cup unit, 115 volts (see fig 7 and 8) 2. APPLICABLE DOCUMENTS 2.1 bids or request for proposal, form a part of t
4、he specification to the extent specified herein. The following documents of the issue in effect on date of invitation for / SPECIFICATIONS Federal QQ-A-250 QQ-A-250/1 QQ-A-250/2 QQ- S-7 66 QQ-W-423 PPP- B- 60 1 PPP- B- 636 PPP- T- 60 Aluminum Alloy, Plate and Sheet, General Specification for Aluminu
5、m Alloy 1100, Plate and Sheet Aluminum Alloy 3003, Plate and Sheet Steel Plate, Sheet, and Strip - Corrosion Res ist ing Wire, Steel, Corrosion Resisting Boxes, Wood, Cleated-Plywood Box, Fiberboard Tape, Pressure Sensitive- Adhesive, Waterproof, for Packaging r - f THIS DOCUMENT CONTAINS 16 PAGES.
6、._ . - - - -_- .SC 7310 - - Licensed by Information Handling ServicesMIL-B-75258 73 %$ 7779106 0233073 L MIL-B-7525B Mi 1 it ar y MIL-P- 116 Preservation, Methods of MIL-W-5088 Wiring, Aircraft, Installation of MIL-W-6858 Welding, Resistance, Aluminum, Magnesium, Non- Hardening Steels or Alloys, Nic
7、kel Alloys, Heat- Resisting Alloys, and Titanium Alloys, Spot and Seam Support Equipment, Aeronautical, Special, General Specification for the Design of Spring, Helical, Compression and Extension Hot Cups, Liquid, Electric, Airborne MIL-S-8512 MIL-S-13572 MIL-H- 2 1303 STANDARDS Mi 1 i tar y MIL- ST
8、D- 105 Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 , Marking for Shipment and Storage MIL-STD- 130 Identification Marking of U.S, Military Property MIL-STD-1186 Cushioning , Anchoring , Bracing , .Blocking, and Waterproofing, with Appropriate Test Methods MS 25231 Lamps,
9、Incandescent, Single Contact, Miniature Bayonet Bas e MS 35206 Screw, Machine, Pan-Head, Cross-Recessed, Carbon Steel, Cadmium Plated, UNC-2A Air For ce -Navy Aeronautical AN373 Nut, Self-Locking, Plate, Countersunk, looo, 250F (Copies of specifications and standards required by suppliers in connect
10、ion With specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this specifi- cation to the extent specified herein. Unless otherwise indicated, the issue in effect on da
11、te of invitation for bids or request for proposal shall apply. National Bureau of Standards Handbook H-28 Screw-Thread Standards for Federal Services (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D. C. 20402.) National Motor F
12、reight Traffic Association, Inc. National Motor Freight Classification (Application for copies should be addressed to the American Trucking Associa- tions, Inc., Attn: Tariff Order Section, 1616 P St., N. W., Washington, D.C., 20036 .) _- .- 2 Licensed by Information Handling ServicesMIL- B- 7 525B
13、Uniform Classification Committee Uniform Freight Classification (Application for copies should be addressed to the Uniform Classification Com- mittee, 202 Union Station, 516 W. Jackson Blvd., Chicago, 11. 60606.) 3. REQUIREMENTS 3.1 First article. Unless otherwise specified (see 6.2), this specifica
14、tion provides for first article testing and inspection. A first article comprises a preproduction model or initial production sample; approval involves testing and evaluating the first article for conformance with the requirements herein before, or in the initial stage of production under a contract
15、. Approval of the first article shall not relieve the supplier of the responsibility to furnish equipment in accordance with the requirements of this specification. 3.2 Design. Hot cup brackets and receptacles shall be either single or four cup units and shall be designed to conform to figures 1, 3,
16、 5, or 7. Spes A-1 andA-2 shall be designed to operate on 28 volts and Types B-1 and B-2 shall be designed to operate on 115 volts. The back of each bracket shall be readily removable for access to the components and wiring. All components shall be mounted in such a manner that will allow easy maint
17、enance or replacement using tools and maintenance equipment normally available as commercial standards. Special and commercial standard tools are defined in MIL-S-8512. 3.2.1 Material. The hot cup bracket shall be constructed of 0.032 inch thick anodized aluminum conforming to QQ-A-250/1 (H14 or H24
18、), or QQ-A-250/2 (H14 or H-24), or corrosion resisting steel conforming to QQ-S-766, class 201, 202, 302, or 304. with at least a 180 grit finish. Corrosion resisting steel shall be 0.024 inch thick (24 gauge) 3.2.2 Interchanpeability. All parts having the same manufacturers part num- ber shall be f
19、unctionally and dimensionally interchangeable. All parts shall be manufactured to such standards as will permit replacement without modifica- tion of parts or equipment. 3.2.3 Threads. All threaded parts shall be in the inch system and shall conform to Handbook H28. 3.3 Construction. The hot cup bra
20、ckets shall be of spot-weld construction, shall be complete and ready for use when connected to a suitable souree of power. repair. The brackets shall be fabricated of parts which are sound and free from Defective parts shall not be reclaimed for use. 3.3.1 Welding. material being used. Spot welding
21、 shall be in accordance with MIL-W-6858 for the All discoloring shall be removed from the weld areas. 3.3.2 Fastening devices. All screws, pins, and similar parts shall be instal- led with means to prevent loss of tightness. adjustment shall not be swaged, peened, or otherwise permanently deformed.
22、Thosesubject to removal or 3.4 Components. retainer, receptacle, indicator light, timer, and electrical cord. The hot cup bracket shall consist essentially of a cup 3.4.1 meter coil extension spring for retaining hot cups conforming to MIL-H-21303 Spring retainer. Each bracket shall be furnished wit
23、h a 3/16 inch dia- - - .- - P - I 7 3 Licensed by Information Handling Services- - _._ . .- - . . _,- NIL-B-7525B 73 a 7477706 0237073 T EWl f . .-. . . ,- i 1 . MiL-B-7525B c .- t . r. I 4 i 42 -U - IS ;? -. Licensed by Information Handling ServicesLicensed by Information Handling Services. - MIL-R
24、-7525B 73 7997906 0237075 3 W *: .7,? . . I .i i- . 6 :7 I. I. .I . t Licensed by Information Handling Services: . MIL-B-75258 73 S 997770b 023707b 5 1 P zd2- - I ,. I. FIGURE 4 7 7. VIR 4 HOLES c Licensed by Information Handling Services. . TYPE A-2 FIGURE 5 8 ,- . 9 Licensed by Information Handlin
25、g Services:. .- . -. . i . . . . .-,A ;. - . .: .F : .: ., . .- EEL-B - 762 5 B - .38 WIDE TYPE A-2 ETCURE 6 9 Licensed by Information Handling Servicesi - -:- i MIL-B-7525B 73- 777770b 0237077 O mI HIL-B - 7525B _- ._.I I -d - -7 i -,_Li FIGURE 7 10 Licensed by Information Handling ServicesMIL-B-75
26、25B 73 W-9999906 0239080 7 Q: MIL-B-75253 - INDICATOR /- TYP. 3-2 FIGURE 8 11 OF Licensed by Information Handling Services. .: . , :-“ .- .* . . NIL-B-75256 73 m 777770b 0237081 7 .Ei: MU- E - 7 5 2 5B FEURE 9 12 Licensed by Information Handling ServicesMIL-B-7525B 73 W 777770b 0239082 U =! MIL-3-7
27、52513 in position. shall be fabricated of 0.020 minimum diameter corrosion resistant steel wire conforming to QQ-W-423. the bracket when a hot cup is in place. The free length for Types A-1 and B-1 shall be 18 inches and the free length for Spes A-2 and B-2 shall be 6 inches. The spring shall confor
28、m to Type fi, kade B of MIL-S-13572 and The spring shall be designed for easy fastening to One end shall be permanently attached. 3.4.2 ReceptacleCs). applicable) receptacle(s) for plugging in hot cups conforming to MIL-H-21303. . The receptacles shall be in accordance with figure 9 and shall be mou
29、nted on pivots to allow sideways movement. around jacket with studs for mounting into the swivels. . allow a total sideways motion of approximately 15 degrees. holes in the receptacles of Types A-1 and A-2 brackets shall make satisfactory electrical contact with Type I hot cups conforming to MIL-H-2
30、1303. The contact pin holes in the receptacles of Types B-1 and B-2 brackets shall make satisfac- tory electrical contact with Type II hot cups conforming to MIL-H-21303. Each bracket shall be provided with one or four (as Each receptacle shall have a steel, wrap-_ _ The swivels shall The contact pi
31、n 3.4.3 Indicator linht(s). Each bracket shall be provided with one or four (as applicable) indicator light(s) to indicate when power is being applied to each hot cup. Each light shall have an amber, transparent, removable plastic cover to protect the bulb. 28 volt power source and Type B-1 and 33-2
32、 lights shall operate directly from . the 115 volt power source. when the current is applied and to go off when the timer cuts off the current. Bulbs for Type A-1 and A-2 shall be in accordance with MS-25231-1819. Type A-1 and A-2 lights shall operate directly from the Each light shall be wired with
33、 a timer to come on . 3.4,4 Timer(s). able) mechanical timer(s) with snap action switch, constructed and installed so that power may be applied to each hot cup for any preset length of time from O to 30 minutes, Each timer shall be so constructed that, after setting, move- ment of the knob in either
34、 direction will not damage the timer. An internal stop shall be provided- to prevent the timer knob from turning more than one complete revohtion. than setting, except that initial cocking shall be permissible. The timer scale shall be graduated in minutes and the number of minutes shall be indica-
35、ted every five minutes. The timers for Types A-1 and A-2 brackets shall be rated at 22 amperes at 28 volts direct current. B-2 brackets shall be rated at six amperes at 115 volts alternating current. Each timer shall have an accuracy of plus or minus ten percent per hour over a temperature range of
36、zero degrees to ninety degrees Fahrenheit. Each bracket shall be provided with one or four (as applic- The timer mechanism shall require no activation other The timers for !&pes B-1 and 3.4.5 Electrical cord. Each hot cup bracket shall be provided with a 3-foot, heavy duty, rubber covered cord for t
37、he power source. The cord shall be sized to carry the current specified in 3.6. 3.5 Mounting provisions. lugs for installation. The bracket body, bracket back plate and lug will be assembled with self-locking plate nut AN 373F832A and pan head machine screw MS 35206-245 or equal. attached to the bra
38、ckets. Each bracket ohall e provided with four removable The brackets shall be furnished with the lugs 3.6 Electrical. accordance with the applicable portions of MIL-W-5088. brackets shall be designed for a total maximum direct current of 88 amperes at 28 volts and wiring for Type A-2 brackets shall
39、 be designed for a total maximum direct current of 22 amperes at 28 volts. All wiring and electrical connections shall be made in Wiring for Type A-1 Wiring for Type B-lbrackets shall Licensed by Information Handling ServicesMIL-B-7525B-73 7777706 0237083 2 -1 - e- - MIL-B- 7525B be designed for a t
40、otal maximum current (both AC and DC) of 24 amperes at 115 volts and wiring for Qpe B-2 shall be designed for a total maximum current (both AC and DC) of 6 amperes at 115 vglts. utilize insulated copper bus bars inside rear of each unit where each station may be wired to. Type A-1 and B-1 brackets m
41、ay 3.7 Performance. cr iter ia . Each hot cup bracket shall meet the following performance 3.7.1 Operation. source (28 or 115 volts as applicable), and with a voltmeter connected to the receptacle, shall pass the tests specified in 4.5.1. 3.7.2 Timer accuracy. 3.4.4 when tested in accordance with 4.
42、5.2. 3.8 Identification. Each bracket shall be permanently marked for identifica- tion in accordance with MIL-STD-130. Identification shall include the follow- ing information: Each hot cup bracket, when connected to a suitable power Timers shall operate within the accuracy requirement of I. Nomencl
43、ature Electrical Characteristics Manufacturers Name Manufacturers Identification Contract or Order Number Federal Stock Number Date of Manufacture us 3.9 Workmanship. The hot cup brackets shall be constructed in accordance with good commercial practices, temper, clean, sound, smooth, commercially st
44、raight or flat, and free from injurious defects. Each bracket shall be uniform in quality and 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirement
45、s as specified herein, Except as otherwise specified in the contract or order, the supplier may use his own or any facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the in
46、spections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Classification of inspection. The inspection requirements specified here- in are classified as follows: a. b. First article inspection (see 4.2
47、.1). Quality conformance inspection (see 4.2.2). 4.2.1 First article inspection. 3.1. first article inspection shall be performed. Unless otherwise specified When first article approval is required under (sei 6.2), first articie inspection shall comprise the examination in 4.4 and all tests in 4.5.
48、Failure of the item to pass the examination or any test shall be cause for disapproval of the first article. Licensed by Information Handling ServicesMIL-8-7525B 73 W 7979706 0237084 4 W . - MIL-B-7 525B 4.2.2 Quality conformance inspection. Quality conformance inspection shall be performed on sampl
49、e units selected in accordance with 4.3. specified (see 6.2), quality conformance inspection shall comprise the examina- tion in 4.4 and the tests in 4.5. or any test shall be cause for rejection. Unless otherwise Failure of any unit to pass the examination 4.3 nation and tests from each lot in accordance with inspection level II of MIL- STD-105. the same type being offered for delivery to the Government at one time under a specific contract. hot cup bracket. Sampling. Random samples of hot cup brackets shall be selected for exami- F
