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Publication numberUS2514246 A
Publication typeGrant
Publication dateJul 4, 1950
Filing dateSep 30, 1947
Priority dateSep 30, 1947
Publication numberUS 2514246 A, US 2514246A, US-A-2514246, US2514246 A, US2514246A
InventorsKnox Robert N
Original AssigneeRca Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Radio chassis of the plug-in type
US 2514246 A
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Description  (OCR text may contain errors)

y 4, 1950 R. N. KNOX 2,514,246

RADIO CHASSIS OF THE PLUG-IN TYPE Filed Sept. 30, 1947 INVENTOR ATTO RN EY Patented July 4, 1950 2,514,246 RADIO CHASSIS OF THE PLUG-IN TYPE Robert N. Knox, Erlton, N. J., assignor to Radio Corporation of America, a corporation of Delaware Application September 30, 1947, Serial No. 777,020

- 1 Claim.

This invention relates to radio and analogous electrical apparatus of the type wherein the various parts or stages of the installation are contained in plug-in chassis units in order to permit the removal of any given chassis unit for purposes of inspection and repair.

In such apparatus a great many complementary plug and socket terminals or contacts may be required to complete the electrical circuits between each unit and the other units of the set. Such complementary terminals or contacts, or some of them, may carry currents of high frequency, hence they must fit very tightly and, as a consequence, difficulties frequently arise in aligning and inserting and withdrawing such plug-in chassis-units from the shelves or panels upon which they are mounted.

Accordingly, the principal object of the present invention is to provide an improved plug-in chassis assembly and one characterized by the provision of means for facilitating the alignment and the insertion and removal of the plug-in chassis units from the shelves or panels upon which they are mounted.

Another and related object of the invention is to provide an improved portable plug-in chassis unit having a handle for carrying the same, and one wherein the handle is so constructed, positioned and arranged with respect to the electrical terminals or contacts of the assembly that it constitutes a lever for applying engaging and disengaging forces to said terminals or contacts.

Certain details of construction together with other objects and advantages will be apparent and the invention itself will be best understood by reference to the following specification and to the accompanying drawing, wherein,

Fig. 1 is a view in perspective of an improved shelf-mounted electrical installation including a lever-actuated plug-in chassis constructed in accordance with the principle of the invention, the chassis being shown upon the shelf of the assembly with its electrical terminals disconnected and Fig. 2 is a fragmentary side elevation of the assembly of Fig. 1, the chassis being shown in its normal position on the shelf with the terminals connected.

In the embodiment of the invention that has been selected for purposes of illustration l designates, generally, an inverted box-like metal chassis or compartment, and 2 is a stationary shelf upon which the chassis is removably supported. The removable compartment l is of more or less conventional form and dimensions and, as in standard practice, is provided with a number of control elements, exemplified by a switch 3 and knob 4 on its front panel 5, and has a multiplicity of vacuum tubes 6 and other elementary parts 1 of an electrical amplifier on its top surface 8. These several parts 3 to I inclusive will be understood to be interconnected within the compartment I and there is an insulating terminal or contact board 9 having prong-like connectors I0 affixed to the rear surface of the said compartment for connecting the amplifier to an external circuit or circuits through the complementary jacks ll of a socket H which is mounted in register with the male connectors l0 upon an upstanding panel I3 at the rear of the shelf 2.

As previously indicated, the aligned plugs l0 and jacks H are preferably tight-fitting, to ensure perfect electrical continuity, and this tightness (which may be enhanced through long engagement) may render it diflicult to remove and re-install the chassis. This objection to present day plug-in chassis installations is overcome, in accordance with the present invention by the provision of a lever IS on the chassis I and a catch for the weight arm" of the lever, upon the shelf 2. As shown more clearly in Fig. 1 the lever I5 preferably comprises an inverted U-shape member having its arms I51: and I5!) pivotedly secured intermediate their ends, as at Hi, to the sides of the chassis adjacent to the front panel 5. This U-shape member l5 thus comprises a lever of the first class and is adapted to be pivoted forwardly and downwardly toward the plane of the shelf 2 and thus to comprise a handle for removing the chassis from the shelf and for carrying the chassis when it is off the shelf. Each of the free ends or weight arms l5w of the lever has a latch on the form of a notch I! in its front edge for engagement with the front edge or catch l8 of the cutaway portion IQ of the shelf 2. Thus, when the handle I5 is down as shown in Fig. 1 so that the notch or latch I! of the lever clears the surface of the shelf, the chassis may be pushed inwardly until the latch is in register with the opening l9. When the chassis is in this position, i. e. with the latch in register with the aperture IS, the prongs II! at the rear of the chasis are closely adjacent the socket I2 on the rear panel l3. The handle l5 may now be raised so that its notch or latch I I engages the edge or catch I8 on the shelf. The continued application of force to the handle moves the chassis rearwardly on the shelf and urges prongs 10 into the jacks l l in the socket l2.

It will .be observed that the rear corner of the weight arm I510 of the lever is cut-away at the reg of the notch I! to provide a curved or slanting surface 20. When the handle [5 is pulled forwardly from its upright or locked in position, this slanting surface 20 is caused to bear against the rear edge 2| of the aperture I9. Thus, when the handle is pulled down the resulting lever action moves the chassis forwardly a limited distance suflicient to pull the prongs l0 out of the socket l2 whereupon the chassis may be pulled oil. the shelf and carried away upon the handle.

It will now be apparent that the present invention provides an improved plug-in chassis assembly and one characterized by the provision of a combined handle and lever for facilitating the insertion and removal of the plug-in units from the shelves or panels upon which they are mounted.

What is claimed is:

In combination a rectangular chassis, a shelf for supporting said chassis provided with an aperture spaced from its front edge, said chassis being removably mounted on said shelf, cooperating electrical contacts, one of said contacts b'eing mounted on the rear face of said chassis and the other of said contacts being mounted at the rear of said shelf, a pivot on the side of said chassis spaced from its lower edge, a lever rotatably mounted on said pivot, said lever having a notch in one end thereof, said notch engaging the front edge of said aperture when said lever is rotated in one direction about its pivot, whereby continued movement of said lever in said direction forces said chassis into mounted position and said contacts into firm engagement, a cam surface on said lever opposite said notch, said surface engaging the back edge of said aperture when said lever is rotated in the opposite direction whereby continued movement of said lever in said opposite direction withdraws said chassis from mounted position and forces said contacts out of engagement.

ROBERT N. KNOX.

BEIFERIENGES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,213,287 Smith Jan. 23, 1917 1,718,374 Oberst June 25, 1929 2,077,160 Wilson Apr. 13, 1937 2,121,610 Rugg et al. June 21, 1938 2,391,460 Howard Dec. 25, 1945 2,409,289 Levin et a1. Oct. 15, 1946 FOREIGN PATENTS Number Country Date 433,891 Great Britain Aug. 22, 1935

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1213287 *Jan 9, 1914Jan 23, 1917Crouse Hinds CoTerminal box.
US1718374 *Jul 11, 1925Jun 25, 1929Sonora Phonograph Company IncRadio apparatus
US2077160 *Jul 14, 1934Apr 13, 1937Bell Telephone Labor IncRadio transmitter
US2121610 *Oct 30, 1935Jun 21, 1938Westinghouse Electric & Mfg CoDistribution apparatus
US2391460 *Mar 19, 1941Dec 25, 1945Howard Styles TPortable range
US2409289 *Sep 20, 1943Oct 15, 1946Teletype CorpPlug separator
GB433891A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2544314 *Oct 28, 1948Mar 6, 1951Gen ElectricSwitchgear drawout mechanism
US2602842 *Jun 7, 1949Jul 8, 1952Motorola IncRailroad communication system
US2609268 *Dec 8, 1948Sep 2, 1952Nye Robert GlenMechanical pressure latch
US2711452 *Jul 28, 1951Jun 21, 1955Westinghouse Electric CorpDraw-out switchgear apparatus
US2714195 *Sep 19, 1951Jul 26, 1955Beatty John WQuick connect-disconnect electrical connectors
US2724094 *Nov 3, 1954Nov 15, 1955Lewis Richard BElectrical connector hood assembly
US2731555 *Oct 5, 1950Jan 17, 1956Motorola IncRadio set housing and mounting
US2734416 *Aug 26, 1950Feb 14, 1956The Baldwin Piano Companycorwin
US2735077 *May 29, 1952Feb 14, 1956Westtoghouse Electric CorporationPanel release mechanism
US2735965 *May 2, 1952Feb 21, 1956 balanda
US2738419 *Jul 26, 1952Mar 13, 1956Motorola IncRadio receiver apparatus
US2760122 *Jun 1, 1953Aug 21, 1956Rca CorpCommunication equipment
US2820875 *Jun 23, 1954Jan 21, 1958Ind Electronic Engineering CorHigh frequency dielectric heating apparatus
US2855454 *Oct 29, 1953Oct 7, 1958Milton AldenHousing for mounting electrical circuit components
US2897033 *Jul 28, 1955Jul 28, 1959Amalgamated Wireless AustralasExtractor-engager device
US2898585 *Jul 20, 1956Aug 4, 1959Stephen BaumanEasy service tv set
US2926056 *Jan 20, 1958Feb 23, 1960Camloc Fastener CorpLatch
US2928059 *Jan 6, 1958Mar 8, 1960IttWaveguide coupling
US2934639 *Nov 18, 1957Apr 26, 1960Salisbury Beryl TRadio receiver mounted on wall receptacle
US2986600 *Dec 11, 1959May 30, 1961Sylvania Electric ProdPortable television receiver
US2991356 *Feb 6, 1959Jul 4, 1961Motorola IncRadio receiver
US3039837 *Jan 8, 1960Jun 19, 1962Hartwell CorpLatching device
US3046461 *Jan 2, 1958Jul 24, 1962Hagan Chemicals And Controls IElectronic controls with reversing shade pole motors
US3104282 *Apr 6, 1960Sep 17, 1963Motorola IncPrinted circuit panel with plug-in connectors
US3109896 *Oct 22, 1958Nov 5, 1963Philco CorpRadio receiver means employing separable complementary units
US3111720 *Dec 3, 1957Nov 26, 1963Sherron Percival HTelephone booths with pull out ceiling structures
US3193236 *Feb 12, 1962Jul 6, 1965Lord Mfg CoDamped chassis
US3275395 *Jan 12, 1965Sep 27, 1966Bell & Howell CoLocking mechanism
US3279875 *Aug 12, 1964Oct 18, 1966Jr Maurice De WitteModular-type instrument cases
US3333911 *Mar 21, 1966Aug 1, 1967Motorola IncMounting structure for an electronic device
US3348187 *Aug 25, 1964Oct 17, 1967Amp IncMultiple switch
US3363145 *Oct 12, 1966Jan 9, 1968Sanyo Electric CoConstruction of deflection and high voltage system for television receiver
US3467461 *Jul 17, 1967Sep 16, 1969Us NavyCabinet securing mechansim
US4124319 *Dec 30, 1977Nov 7, 1978Hollingsead Enterprises, Inc.Support plate for avionics connector shell
US4153127 *Aug 30, 1976May 8, 1979Firma Deutsche Automobilgesellschaft MbhStructural unit for an electric vehicle
US4501455 *Jan 15, 1982Feb 26, 1985Honeywell Inc.Locking and extraction mechanism for rack mounted components
US4601445 *Dec 27, 1984Jul 22, 1986R. Alkan & CieDevice for rapid fixing and removal of a loader to and from an aircraft carrying device
US4705257 *Mar 23, 1987Nov 10, 1987Digital Equipment CorporationShock and vibration isolation mounting
US4818986 *Jan 27, 1987Apr 4, 1989Bauman Robert MApparatus for controlling access to data storage devices
US4954928 *Sep 16, 1988Sep 4, 1990La Telemecanique ElectriqueMemory cartridge for electronic equipment, and electronic equipment provided with such cartridges
US4955678 *Jun 30, 1989Sep 11, 1990Clarion Co., Ltd.Engaging structure for a mountable/dismountable electronic apparatus used in a vehicle
US5045960 *Jun 13, 1989Sep 3, 1991Zenith Data Systems CorporationSelf-aligning guide and track for removable disk drive module
US5174774 *Feb 20, 1991Dec 29, 1992Souriau & CieLever locked connector
US5333097 *Jun 18, 1992Jul 26, 1994Digital Equipment CorporationDisk drive holder and interconnection system
US5379184 *Oct 25, 1993Jan 3, 1995Unisys CorporationPry-in/pry-out disk drive receptacle
US5395261 *May 14, 1993Mar 7, 1995International Business Machines CorporationServiceable data terminal structure
US5557499 *Jun 28, 1994Sep 17, 1996Ast Research, Inc.Hard-disk drive tray assembly with pivotally rotatable front bezel
US5791753 *Aug 29, 1996Aug 11, 1998Compaq Computer Corp.Computer component handle assembly
US5947572 *Sep 18, 1998Sep 7, 1999Chang; Cheng-ChunHard disk drive drawer
US5949652 *Oct 24, 1997Sep 7, 1999Dell U.S.A., L.P.Computer power supply insertion and extraction apparatus and method
US6257917 *Jul 11, 2000Jul 10, 2001Itt Manufacturing Enterprises, Inc.Connector latching arrangement
US6736667 *Apr 14, 2003May 18, 2004Hon Hai Precision Ind. Co., Ltd.Cable connector assembly having pull tab
US6820953 *Mar 22, 2002Nov 23, 2004Frank WojcikMemory storage device carrier having a locking handle
US7210751 *Aug 18, 2004May 1, 2007Fujitsu LimitedMounting/demounting construction of apparatus unit, and electronic apparatus
US7364242 *Nov 16, 2004Apr 29, 2008Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd.Mounting apparatus for data storage devices
US7535717 *Mar 27, 2006May 19, 2009Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd.Fixture for testing mid-plane of blade server
US8256737Mar 13, 2009Sep 4, 2012Southco, Inc.Leverage device and system using same
US8289695 *Mar 31, 2010Oct 16, 2012Hannstar Display Corp.Apparatus for mounting device having electrical terminals
US20110085295 *Mar 31, 2010Apr 14, 2011Hannstar Display Corp.Apparatus for mounting device having electrical terminals
DE974266C *Apr 19, 1952Nov 10, 1960Standard Elektrik Lorenz AgEinschiebevorrichtung fuer in Gestelle, insbesondere fuer in Geraetegestelle der elektrischen Nachrichtentechnik, einschiebbare Gehaeuse
DE1234818B *Sep 5, 1962Feb 23, 1967Telefunken PatentGeraet der Nachrichtentechnik mit einem Chassis und einem loesbaren Tragegriff
Classifications
U.S. Classification361/727, 455/349, 439/484, 174/542, 174/541, 312/332.1, 455/348, 439/160, 439/157, 361/724
International ClassificationH05K7/14, H05K7/04
Cooperative ClassificationH05K7/1421, H05K7/04
European ClassificationH05K7/14E, H05K7/04