1、1. GG-P-0066LB 67 m 7777774 0032864 2 Febniary 8, iyn IHPERIM REVISION OF Fed. Spec. G-P-66ia June 1, 1960 ImERIM FEDERAL sEaCIFIcA!rIOrl PROJE(;TOR, STILL PICPURE, OVERBEAD; A!PTACXMB?TS AND ACCI?SSORIES This interim Federal Specification waa develapea by the Stadardization Division, General Servic
2、es Administration, Federal Supply Service, Waehington, D. C., 20406, based upon currently available technical information. Fedelsl agencies use it in procurement and foruard recommendations for changes to the preparing activity at the address shown above. The General Services Administration haa auth
3、orized the use of this Interlm Federal Specification as a valla exception to Federal Specification cO-P-66l.A, ated June 1, 1960. It is recoprmiended that 1. SCOPE AND CIASSIFICATION 1.1 Scope. This specification covers overhead projectors whlch project an image upon a vertica screen in a roaan,ligh
4、ted with normal intensity. 1.2 CLassification. 1.2.1 Types and clsses. specified (see 6.2): Overhead projectors shall be of the following types an Types : Type I. StandSrd. Type II. Glare Reducing. Classes : Class A. Auditorium Type mjectoxa (see table I). class B. sesroom Type Projectors (see table
5、 I). as C. Collapsible Desk-Top Fmjectors with Integzal cafiying Csse (see table I). 2. APPLICABLE 2.1 The following documents of the issues in effect on the date of invitation forbids,or request for proposal, fom a part of this 8pecification to the extent specified herein: Fedezal Specifications :
6、J-C-175 = Cable Assembly, Power, Electriced. cc-M-636 - Motors, Fractional-Horsepower, Alternating Current. Federal standarda: Fed. Std. No. 123 - Marking for Danestic Shipment (Civll Agencies). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(Activi
7、ties outside the Federal Govenunent may obtain copies of Federal Specifications, Standards, and Handbooks as outlined under General Infonmtion in the Index of Federal Specifications and Standards and at the prices indicated in the Index. supplements as issued, is for sale on a subscription basis by
8、the Superintendent of Documents, U. S. Governent Printing ffice, Washiwon, D.C. 20402. (Single copies of this specification and other Federal Specifications required by activities The Index, vhich includes cumulative nonthly outside the Federal Government for bidding purposes are available without c
9、harge from Edsiness Service Centers at the General Services Adminlstmtion Regional Offices in Boston, New York, Washington, D. C., Atlanta, Chicago, Kansas City, Mo., Fort Worth, Denver, San Francisco, Los Angeles, and Seattle, Washington. (Federal Govement activities may obtain copies of Federal Sp
10、ecifications, Standards, and Handbooks and the Index of Federal Specifications and Standards fm established distribution points in their agencies. ) Military Specifications : n-P-i16 - Preservation, Method Of. MTLT-152 - Treataent, Moiskure and Fungus-Resistant, of Communications, Electronic MILE174
11、 - Glass, Optical. MILC-675 - Coatings of Glass Optical Elements, MILI-983 - Interior Cornunications Equipment, Naval Shipboard. an i285 Walt ;Jhitir.an Road, Melville, Long Island, #e? York 11746; or i655 Scott Blvd., Santa Clara, Ca1ii“ornia 95050. ) 2 Provided by IHSNot for ResaleNo reproduction
12、or networking permitted without license from IHS-,-,-American Nationa stancans institute (ANSI), nc. standard: S1.4-196l- General Purpose Sound Level Meters, Specifications for. (Application for copies should be addressed to the American National Stardarde Institute, Inc., 1430 Broadway, New York, N
13、.Y., 10018.) 3. REQUIRPIENTS 3.1 Fire and casualty hazards. 3.1.1 Each contractor shsll submit to the contracting agency proof that the projector he proposes to supply under this specification conforms to the requirements of the Underuriters Iabozatories, Inc., UL73 and U4, as applicable. accepted a
14、s evidence that th projector conforma to this requirement. The label, or listing with reexamination, of the UL, may be 3.1.2 In lieu of the label, or listing rith reexamination, the contractor IDBY submit independent proof, satisfactory to the contracting agency, that the projector conforms to the a
15、ppucfble requirements of the published standards including methods of tests of the UL73 and U4 atandarde. 3.1.3 Compliance with the above preliminary requirements in regard to fire and casualty hazarde does not absolve the contractor fm complete compliance with the requirements of this specifiC8tiQn
16、 in order to assure acceptance of his material. Prep rouction sample. Unless otherwise specified (see 6.2), before production is comnenced, a complete unit covered by dis specification shall be submitted or made available to the contracting officer or his authorized representative for approval in ac
17、cordance with 4.4. Appd of the preproduction sample authorizes commencement of production but does not reieve the mpplier of responsibility for compliance with alz applicable provisions of this specification. preproduction sample ehall be manufactured in the same facilities to be used for the manufa
18、cture of the prodwtion items. The approved prepduction model shai be used as a guide to inspect production units and my be presented for acceptance as the last unit of the aontract. 3.2 The 3.3 Material. Material shall be a8 specified herein. Where rnsterlal ia not specified, a aiatex-ial shall be u
19、sed which will meet the perfomce requirements of this specification. Metals used shall be either conosion resistant or suitably treated to resist corroaionnwaia conditions to which the projector will be subjected when in storage or during use. 3.3.2 Dissimilar metals. Dissimilar metals, especiuy bra
20、ss, capper or steel in contact with magnesium, aluminum or other dloys, shall be avoided *ewer practicable. When such contacts are unavoidable, the metal shll be properly protected against .electrolytic corrosion. An interposing msterial compatible to each of the dissimihr metals or other suitable m
21、eans shall be utilized to properly protect metal against electrolytic CornSion. No insulating mterial will be required between corrosion-resistant steel inserts and aluminum castings when the inserts are integrally cast in the aluminum. The metal referred to shall be the metal on the surfaces of the
22、 part; i.e., zinc shall include all zinc parts such as castings as well as zinc-coated parts, whether the zinc is electrodeposited or applied by hot dipping or by metal spraying, aver similar or dissFmiLar metal parts. These requirements shall not apply to stanard component parts of assemblies such
23、as dvetg, bolts, mts, and where which Vili be painted prior to being placed in service. 3.3.1 The Ught 8-e of the projector .shall be a form of Tungsten Balogen Lrrpip having a minimum rat 3.l.9 Switch. A two-position or three-position mtch for tuning the projector “ON“ snd “OFF“ or “OH“, “OFF“ and
24、“Blower“ shall be located on the front panel of the pmjector. When specified (see 6.2), either a double pole, single thmw or a four pole, double throw mtch sh8ll be used. ife of 75 hours. The iaarp shall have a lated voltage ofF3.20 vnlts. i Provided by IHSNot for ResaleNo reproduction or networking
25、 permitted without license from IHS-,-,-GG-P-OObhLB 67 997777LI O032869 L W I 3.11.10 Safety interlock. An electrical interlock shall be provided to automatically disconnect power to the Lamp and blowerLby,-qing both sides of the power lines when either the lamp access door or other normally used en
26、tryway into the lamp and blower compartment for purposes of replacing or cleaning componemts is opened or removed. 3.12 Optical system. 3.12.1 Projection lens. The lenses shill be in accordance with the requirements in table I when tested in accordance with 4.4.13. surfaces of the lens shall be trea
27、ted in accordance with M when a test is referenced, meeting the test shall be considered as compiiance with the requirement. 3.22.1 Temperature. When tested in accordance with 4.4.14, the performance shall be as follows: . (a) temperature extreme not to exceed 4 hours, and at the low temperature not
28、 to exceed 72 hours, at any one time. temperature extreme not to exceed 4 hours. at a low temperature not to exceed 24 hours, at any one time. specification, when tested in accordance with 4.4.9. Operating: Ambient temperature in the range of bo0 to 105OF.i exposure at the high (b) Nonoperating: Amb
29、ient temperature in the range of -40. to +i50%.; exposure at hi when tested, as specified in 4.4.11, it shall be detewined that the folouing requirements specif ed herein are complied with: (a) Blower motor and lamp apexation in accordance with 3.ll.2. (b) The proJected image in accordance with 3.U.
30、l.l and 3.12.1.3. 3.26 Workmsnship. The item shall be Wactured ad assembled in accordance with the applicable portiona of the following paragraphe herein: 3.4 Cleaning. 3.8 Securing of parts. 3.U Electrical Cyst-. 4. QUALTPY ASSURANCE PROVISIONS 4.1 Res onsibility for ins ection. Unless otherwise sp
31、ecified in the contract or purchase order, Tsee6;2)r-t-supplierpis responsible for the performance of all inspection requirements as speciTied herein;-2 Preproduction inspection. This inspection will be performed by the Government; unless otherwise specified in the contract. It shall consist of the
32、preproduction inspection specified in table I1,and the inspection specified for group A, Gmup B, and group C (see tables III, IV, and v. respectively). TABLE II. Preproduction inspection Inspection (For additional preproduction inspection, see 4.3.2) , Bounce test. Moisture resistance. Temperature.
33、Vibration. Weight. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5.3 inspection of equipment prior to delivery. The contractor shall perform the inspection specified in 4.3.3.1 through 4.3.3.4.This does not relieve the contractor of his responsib
34、ility for performing any additional inspection which is necessary to control the quality of the product and to assure compliance with all specification requirements. the contractofle iriepection procedures and examine the contractorts inspection reconis. the Government-at its discretion-may perform
35、all or any part of the specified inspections to verify the contractors compliance with requirements. inspection shall be made available by the contzactor. gmup A, group B, or group C inspection, except preproduction samples, shall. be preconditioned after final assembly. The Government will review a
36、rad evaluate In addition, Test equipment for Government verification nr: a density reading of 1. compliance with 3.25. focused on a screen in a plane perpendicular to the optical axis of the projector. illuminated area shall be 5 feet square and shall be divided into 25 equal squares. (not reflected
37、) illumination at the center of each square shall be measured with 3 photoelectric light meter corrected by suitable color filters to conform to within a good approximation to the visibility curve of the human eye. foot-candles equals the light output in lumens. when making the measurements. 4.4.13
38、Resolving power, The image shall be insoected and the controls shall be operated to deteimrlne 4.4.12 Screen lumens output. To determine the screen lumens output. The projector shall be The screen The direct The sum total of the 25 illunination measurenents in All lenses shall be clean and in proper
39、 adjustment The lens to be tested shall be mounted in a projector. be performed in accordance with MILSTD-i5O, except as noted below: This test shall 5.1.2.12.4 - Method i5 Projected Visual Resolving Power. A ccarplete ohndald projector SU be uee, projecting an image 60 inches wide. The test transpa
40、mncy shall be of photographic or a diaCo type. A poliehe glass plate shall be used to hold the transparency fiat on the pmjection atage. One test group located in the center of the projection sv on the optical axis and eight groupe located on the circlmifernce of an however, this may be reduced, if
41、necessary, to prevent excessive excursion at or rear rcsonance provi9ed that the excursion can still be measured. The total excursion of the applied vibration shall (c) In each of the three directions, change the frequency in steps of one cycle per second ana saintain each frequency for at hast 10 s
42、econds. frequencies between 10 and 25 and between 35 and 55 cycles per second. (cl) (e; Detemine the natural frequency of the equipment; the frequency at which the ratio of the Kessure anplitude of the applied vibration and the vibmtion of the equipnent for equipment vibintion to the applied vibrati
43、on is greatest shall be considered the natural frequency. During the resolution test specified in 4.4.1.3, the presence of hge blurrix caused by vibration shall be observed. of 18 inches from the screen shall be consiclered as unacceptable in accordance with 3.11.5 4.4.18 Lziaze vibration. Any such
44、blurring seen fm a distance 4.4.19 Color bands and patches. Durine; the tests specified any presence of color bands, patches or interference patterns shall be noted. 10 feet or greater fro3 the screen shall be cause for rejection. Any such phenomena visible at a distance of 4.4.20 Dielectric test. T
45、he ir.sulatioii strength of all electrical circuits shall be tested to withstand tvTce the rated voltage plus 1,000 volts. or peak of the same value an9 six11 be qplred for 1 mimte between all current-carrying parts and adjacent conductors not in the circuit and between all wiring anci groznd, witho
46、iit puncturing of insulation or flashover occurring. The power source used ftdric! this test shall haye a capacity of at least 1 kilowatt. The test potential may be d5rect current 4.4.21 Bouzce greconditioniq. The unit, with shock irodnts (if any) removed or blocked, shall be glace6 in its nonne.1 o
47、perating position on the table of the Package Tester, Type 1000-SC, as rrsde by the L.A.B. Covoration, Saneatles, ?ai York, or equal. phase, shall operate at a speecl to make possible the insertion of 1/32 inch strip of material under one comer or edge of the eqriipxent to a distance of 3 inches as
48、the equipment bounces. The equiment shall be subjecte6 to this preconditioning for one minute. the unit shall not be repaire this same horizontal anzle acd distance, elevzte the neter until the projected line of ctzht of the spot ?oms a vertical angle to the plane oi the stage between 45 and 65. Thi
49、s vertical acjle is the viewing angle for different heislt operators (see 3.12.7). aovinE tb.e neter through an arc of 45 to 65O, focus the meter on the bril s,ha packed by level A, B, or C, as Speciried (gee accordance with the requirements for Projector, Opaame ir. KlLE-17555. 5.2 VIrliing. 5.2.1 Civil arrencies. In addition to aEy special narkin5 rsov.ired by the contract or order, the unlt package and shipping container shall be carked in accordance iritb Fed. S
