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Publication numberUS3785184 A
Publication typeGrant
Publication dateJan 15, 1974
Filing dateSep 27, 1972
Priority dateSep 27, 1972
Also published asDE2348465A1
Publication numberUS 3785184 A, US 3785184A, US-A-3785184, US3785184 A, US3785184A
InventorsWirth W
Original AssigneeMinnesota Mining & Mfg
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Locking latch for a disk-pack storage container
US 3785184 A
Abstract
A squeeze operated mechanism for releasably attaching the bottom cover of a disk-pack storage container to a disk-pack which mechanism includes a key-operated lock.
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Description  (OCR text may contain errors)

United States Patent 1191 Wir th Jan. 15, 1974 LOCKING LATCH FOR A DISK-PACK [56] References Cited STORAGE CONTAINER UNITED STATES PATENTS Inventor: Wayne Wirlh, North Paul, 1,786,332 12/1930 Bradshaw 70/165 Minn. 3,736,777 6/1973 Wirth 70/63 [73] Assignee: Minnesota Mining and I Manufacturing Company St Paul Przmary ExammerMz 1rvm A. Champion Minn Assistant ExaminerR1chard P. Tremblay Attorney-Alexander, Sell, Steldt & Delahunt [22] Flled: Sept. 27, 1972 [21] App]. No.: 292,488 5 ABSTRACT A squeeze operated mechanism fbr releasably attach- U-S. Cl. F the b ttQm cover of a disk-pa.ck torage ontainer [5 Int. to a disk-pack mechanism includes a key- 0f Search 166, operated lock 70/167, 169, 173, DIG. 34; 206/52 F, 62 R 2 Claims, 4 Drawing Figures PAIENIEQ M 3.785.184

SHEET 2 BF 2 I FIG. 4

LOCKING LATCH FOR A DISK-PACK STORAGE CONTAINER Field of the Invention This invention relates to mechanisms for closing diskpack storage containers, and in one aspect to an improvement in a mechanism for releasably attaching the bottom disk-pack cover to a disk-pack.

Background of the Invention Storage containers for disk-packs typically comprise mating top and bottom covers, each of which is coupled to a stored diskpack by its own attaching mechanism. To use the disk-pack, the bottom cover is removed by releasing its attaching mechanism. The top cover remains coupled and serves as a wrench to engage a bolt assembly in the hub of the disk-pack with the spindle of a disk drive. Upon such engagement, the mechanism attaching the disk-pack to the top cover is released, and the top cover may be removed.

The top cover cannot be removed prior to removal of the bottom cover, so that access to a contained diskpack can be controlled by restricting operation of the bottom cover attaching mechanism. Such controlled access may be desirable to prevent tampering with packs during shipment, or to prevent inadvertent or unauthorized use of a disk-pack in a storage center.

While the squeeze operated type of attaching mechanism for the bottom cover of a disk-pack illustrated in this application is known, heretofore there has been no known means for restricting operation of this latching mechanism to prevent removal of the bottom cover. Additionally, except for US. Pat. application Ser. No. 194,150, now US. Pat. No. 3,736,777, issued June 5, 1973, in which applicant disclosed a locking means for a rotatably operated bottom cover attaching mechanism, there is no known prior disclosure of a disk-pack storage container with a bottom cover attaching mechanism having a key-operated lock.

Summary ofthe Invention A disk-pack storage container having a bottom cover attaching mechanism according to the present invention affords key-operated locking of the containerto restrict access by unauthorized individuals to the diskpack contained therein.

There is provided a disk-pack container including a circular bottom cover having a mechanism for attaching the bottom cover to the hub of a disk-pack. The attaching mechanism has two latching members mounted for opposed radial reciprocating movement relative to the center of the bottom cover between an outer engaging position to which they are spring biased, and an inner releasing position. Each latching member has a radially projecting arcuate lip spaced from the inner surface of the cover and adapted for engagement over an inwardly projecting annular flange centered in the hub ofthe disk-pack when the latching member is in the engaging position. Also, each latching member has between a blocking position where a locking lug thereof is between the latching members to prevent their movement to the releasing position, and a position affording movement of the latching members to the releasing position.

Brief Description of the Drawing The invention will be further described with reference to the accompanying drawings wherein like mem bers refer to like parts in the several views, and wherein:

FIG. 1 is a vertical view partially in section of a diskpack storage container having a disk-pack therein, and having a bottom cover attaching mechanism including the improvement of locking means according to the present invention;

FIG. 2 is a fragmentary view taken generally along the lines 2-2 of FIG. 1 with the disk-pack removed to show the bottom cover attaching mechanism;

FIG. 3 is a fragmentary view taken generally along the lines 3-3 of FIG. 1 with one part broken way to show details of the locking means; and

FIG. 4 is a fragmentary perspective exploded view partially in section of the bottom cover and attaching mechanism including the locking means according to the present invention.

Description of the Preferred] Embodiment Referring now to FIG. 1, there is shown a disk-pack storage container 10 including atop cover 11 and a bottom cover 12 for housing a disk-pack 14. Each of the covers has its own mechanism for attaching it to the disk-pack 14, and the bottom cover attaching mechanism generally designated 13 includes the improvement of locking means according to the present invention.

The top cover 11 of the disk-pack storage container 10 has a circular top wall 15 and a dependent generally cylindrical side wall 16. The circular bottom cover 12 has a circular gasket 18 attached about its periphery and shaped for engagement with the distal edge of the side wall 16 to afford a dust tight seal.

The attaching mechanism 19 for the top cover 11 is operable only upon removal of the bottom cover 12 and attaches the top cover 11 to a bolt assembly 20 in a hub 21 of the disk-pack 14. The top cover attaching mechanism 19 is of the type described in Us. Pat. No. 3,465,875. Briefly a handle 22 for the disk-pack storage container 10 is mounted in a depression in the top cover 11 and is formed with a socket 23 designed to mate with an upper portion of the bolt assembly 20. The bolt assembly 20 includes a series of balls 24 guided for radial movement within orifices formed in a bolt body 25. The balls 24 are movable outwardly in the orifices to engage receiving notches in the socket 23 by an axially slidable cam within the bolt body 25 (not shown). The cam is normally biased to a position locating the balls 24 outwardly in the orifices to maintain locking engagement with the socket 23. To use the disk-pack the handle 22 is manually rotated to engage a threaded end of the bolt assembly 20 with the drive spindle in a disk-pack drive (not shown). During engagement, an axially fixed pin in the spindle moves the cam, thereby affording movement of the balls 24 inwardly of the bolt body 25 to release the top cover 11.

The bottom cover attaching mechanism 13 includes an externally operable attaching means for releasably attaching the bottom cover 12 to the disk-pack 14, and

locking means including a key-operated pin tumbler lock mechanism for locking the attaching means in the attached position.

Referring now to FIGS. 1 through 4, the attaching means includes a pair of latching members 26 mounted on the bottom cover 12 to afford contradirectional reciprocal radial sliding movement. With respect to the center of the bottom cover 12, the latching members 26 are each slidable from an outer engaging position at which a radially projecting arcuate lip 28 on each latching member 26 is in engagement over an inwardly projecting annular flange 29 centered in the hub 21 of the disk-pack 14 to secure the bottom cover 12 thereto, to an inner releasing position at which the arcuate lips 28 on the latching members 26 are retracted within the annular flange 29 to allow the bottom cover 12 to be removed or positioned adjacent the hub 21. The latching members 26 may be manually moved to the releasing position against biasing means or springs 31 by manually squeezing together a pair of bosses 32 formed on the latching members 26.

Considering the members of the attaching mechanism in more detail, the latching members 26 (best seen in FIG. 4) are preferably molded of a hard plastic. Each latching member 26 includes a semicircular plate like portion 33 having a projection 34 on one surface including a generally U-shaped plate like portion parallel to the semicircular portion 33 and terminating in the arcuate lip 28. The projection 34 is adapted to extend through an opening 36 in thhe bottom cover 12 and the plate like portion on the projection 34 is spaced from the semicircular plate like portion 33 so that their adjacent surfaces will slide on opposite surfaces of the bottom cover 12. The movement of each latching member 26 on the bottom cover 12 is guided by sliding contact between the side walls of the projection 34 and of the opening 36 which side walls are oriented in the direction of movement for the latching member 26. The engaging and releasing positions of each latching member 26 are defined by abutment of the projection 34 against the radially outer and inner walls of the opening 36, respectively. The bottom cover 12 has an annular recess 38 on its inner surface to receive the annular flange 29 on the disk-pack hub 21, and the arcuate lips 28 are spaced from the inner surface at the recess 38 to afford engagement of the arcuate lips 28 over the flange 29.

The boss 32 on each latching member 26 extends across the end of the semicircular portion 33 opposite the arcuate lip 28 at a right angle to the direction of movement of the latching member 26 on the bottom cover 12. The bosses 32 both project from the exterior surface of the bottom cover 12 and provide contraposed gripping surfaces 41 which may be manually squeezed toward each other to move the latching members 26 to their releasing position. A flange 42 projects from the boss 32 on each latching member 26 in a direction opposite the arcuate lip 28. An elongated externally projecting bracket 44 is attached to the exterior of the bottom cover 12 as by screws 45. The bracket 44 is diametrically disposed on the bottom cover 12 at a right angle to the direction of movement of the latching members 26 and has a transverse opening defining an enclosure 46 in which the opposed flanges 42 of the two bosses 32 are guided during sliding movement of the latching members 26. The opposed flanges 42 are each formed with a centrally located arcuate notch 56 to afford clearance for a support post 58 for the bracket 44 when the latching members 26 are in the releasing position, and a pair of elongated gaps 59 equally spaced on opposite sides of the arcuate aperture 56 which form a portion of the lock means to be explained later. The latching members 26 are each formed with a pair of parallel pins 48 projecting at generally a right angle from the side of the boss 32 opposite the gripping surface 41. The pins 48 position the pair of springs 31 between the latching members 26 within the enclosure 46 to bias the latching members 26 to the engaging position.

The lock means of the bottom cover attaching mechanism 13 is best seen in FIGS. 2 through 4. The lock means may be operated by a removable key 51 when the latching members 26 are in their engaging position and includes a key-operated rotatable plug 52 which may be operated to position a pair of locking lugs 54 on a blocking member 55 between the flanges 42 pro jecting from the bosses 32 to prevent movement of the latching members 26 to the releasing position.

The blocking member 55 is preferably a stamped sheet steel part slidably mounted within the enclosure 46 formed by the bracket 44 for movement generally normal to the direction of movement of the latching members 26, and having end walls 66 from which project the locking lugs 54. The blocking member 55 is mounted within the enclosure 46 with a surface 62 of the blocking member 55 slidably contacting the inner surface of the bottom cover 12 and the distal end of the locking lugs 54 slidably contacting the inner surface of the bracket 44. Sliding movement of the blocking member 55 is guided by means including a tab 61 projecting from the surface 62, which tab 61 maintains sliding edge contact in an elongated opening 64 in the bottom cover 12, and an elongated opening 65 in the blocking member 55 adapted for sliding engagement over the central support post 58 of the bracket 44.

The blocking member 55 is thus slidable between a blocking and a non-blocking position. In the blocking position the pair of locking lugs 54 are positioned between the distal edges of the flanges 42 to block movement of the latching members 26 to the releasing position. In the non-blocking position the locking lugs 54 are positioned between the elongated gaps 59 in the flanges 42 to afford movement of the latching members 26 to their releasing positions.

The key-operated plug 52 is rotatably mounted in an aperture 68 in the bracket 44, which aperture 68 is partly defined by a tubular sleeve 69 extending into the enclosure 46 formed by the bracket 44 and positioned adjacent one of the elongated gaps 59 in each flange 42 to afford clearance therebetween during operation of the attaching means. The axis of the plug 52 is oriented generally normal to the direction of movement of the latching members 26. The plug 52 is a commercially available member manufactured by The Chicago Lock Company. The plug 52 is restricted from axial movement within the aperture 68 by a flange 70 which engages a recessed shoulder in the bracket 44 adjacent its exterior surface and a slidably mounted ring 72 retained in a slot on the plug 52 and spring biased to a position radially projecting from the periphery of the plug 52 to engage the distal end of the sleeve 69. The sleeve 69 has two degree opposed axially extending grooves 73 along its inner surface. The plug 52 has a plurality of axially spaced radially slidable tumblers 74. The tumblers 74 are spring biased to a normal position projecting from the plug 52 to afford engagement with either one of the grooves 73, which engagement defines a first and a second position of the plug 52 with respect to the bottom cover 12. The tumblers 74 may be retracted to a position within the plug 52 to afford rotation of the plug by insertion of the key 51 from the outer surface of the bottom cover 12 in an axially extending keyway 76 in the plug 52. The key 51 is retained within the keyway 76 except when the plug 52 is in its first or second position as the tumblers 74 must be free to move to a position projecting from the plug 52 to afford removal of the key 51. Thus by use of the key 51 the plug 52 may be rotated 180 degrees between the first and the second positions, at which positions the key 51 is removable to prevent rotation of the plug 52.

The lock means includes drive means providing driv ing engagement between the plug 52 and the blocking member 55 to move the blocking member 55 between the blocking and non-blocking position upon rotation of the plug 52 between its first and second positions. An eccentrically positioned drive pin 79 projects from the end of the plug 52 positioned within the enclosure 46, and extends through a transverse slot 81 in the blocking member 55. The drive pin 79 is positioned so that at both the first and second positions of the plug 52, a line through the axis of the plug 52 and the axis of the drive pin 79 is in the plane of movement of the blocking member 55. Upon rotation of the plug 52, the drive pin 79 engages one side wall of the slot'8l to move the blocking member 55 between the blocking and nonblocking positions. The slot 81 extends in only one direction from the position of the drive pin 79 at the first or the second position of the plug 52. Thus rotation of the plug 52 toward either its first or its second position is stopped at that position by contact of the drive pin 79 with the end of the slot 81 to define that position for the user.

Operation of the locking means is possible only when the latching members 26 are in the engaging position. The key is inserted to rotate the plug 52 and drive pin 180 degrees, thereby moving the blocking member 55 to a position at which the locking lugs 54 are positioned between the flanges of the bosses 32 to prevent manual movement of the latching members 26.

Having thus described the present invention, what is claimed is:

l. A disk-pack container having a circular bottom cover including an attaching mechanism for attaching the bottom cover to a disk-pack hub having an inwardly projecting annular flange, said attaching mechanism comprising:

two latching members mounted on said bottom cover for opposite reciprocal radial movement between an outer engaging position and an inner releasing position, each latching member having a radially projecting lip spaced from the inner surface of said bottom cover and adapted for engagement over the annular flange of a said disk-pack hub centrally positioned adjacent the inner surface of the bottom cover when said latching member is in the engaging position, and a boss projecting from the exterior surface of the cover and having a gripping surface to afford manual movement of said latching members to their releasing positions; and

spring means for urging said latching members to their engaging positions, wherein the improvement comprises:

lock means for releasably locking said latching members in their engaging position, including:

a locking member having at least one lug and being mounted on said cover for movement from a blocking position with said lug between said latching members to prevent movement of said latching members to the releasing position, to a nonblocking position affording movement of said latching members to said releasing position;

a pin tumbler lock mechanism including a keyoperated plug mounted on said bottom cover for rotation between a first and a second position and operable from the outer surface of said bottom cover; and

drive means for providing driving engagement between said plug and said locking member to move the blocking member between said blocking and non-blocking positions upon rotation of said plug between said first and second positions.

2. The mechanism of claim 1, wherein said attaching mechanism includes an elongate bracket projecting externally from the bottom cover and disposed at a right angle to the direction of movement of said latching members, said bracket having a transverse opening to define an enclosure between said bracket and said bottom cover; said latching members each comprise a flange projecting in a direction opposite said lip and having spaced gaps along the distal edge of said flange, said flanges being guided by said bracket for movement into said enclosure upon movement of said latching members toward said releasing position; and said blocking member has spaced lugs positioned between said gaps when said blocking member is in said nonblocking position, and positioned between the distal edges of said flanges to block movement of said latching member when said blocking member is in the blocking position.

. 'i'lJNlTED STATES PATENT OFFICE I CERTIFICATE OF CORRECTION Patent No 3,7 5,l Dated January 15, 197 4 I nventor(s) Wayne -"Wir'th I: is certified that error appears in the above-identified patent: and that said Letters Patent are hereby corrected as shown below:

Column 2,. line 9, change "mem-" to num Claim 1, line 1 (C01. 6, l. 8) after "when" insert each line 15 (C01. 6, l. 9) after- "position" delete the comma, and after "and" insert having line 16 (C01. 6

1. 10) change "and having" to formed with line 17 (C01. 6, 1. 11) before "said" insert each line 18 (Col. 6, l. 12) change "bers to their releasing positions" to her to itsfreleasing position line 2 4 (Col. 6, l. 18)

change locking"to blocking ---5 line 25 (C01. 6, 1. 19)

change "from" to between ---5 line 28 (C01. 6, l. .22) change "to" (second-occurrence) to and line 33 (C01. 6, l. 27) after "and"(second occurrence) insert positioned to be -5 w and line 37 (001. 6, l. 31') change "locking" to blocking Claim 2, line 1, change "The mechanism of" to A diskpack container according to Signed and sealed this 15th day of August 1974.

(SEAL) Attest:

MCCOY M. GIBSON, JR. c. MARSHALL DANN 3 Attesting Officer Commissioner of Patents 1 warm PC3-1550 uo-ss)

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1786332 *Nov 1, 1928Dec 23, 1930Bradshaw Aubrey OTank-closure lock
US3736777 *Nov 1, 1971Jun 5, 1973Minnesota Mining & MfgLocking attaching mechanism for disk-pack storage container
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3882701 *Nov 28, 1973May 13, 1975Minnesota Mining & MfgLocking latch for a disk cartridge
US4071862 *Mar 1, 1976Jan 31, 1978Nashua CorporationDisc cartridge
US4188648 *Sep 5, 1978Feb 12, 1980Memorex CorporationData security apparatus for magnetic recording disc drive
US4748530 *Apr 14, 1986May 31, 1988Magnetic Peripherals, Inc.Disk cover collar
US4988001 *Jan 10, 1990Jan 29, 1991Agfa-Gevaert AktiengessellschaftMulti-unit package for magnetic tapes wound on to cores
US5372076 *Sep 22, 1993Dec 13, 1994Adams Apple Distributing, L.P.Simulated video cassette tape repository
US6339944 *May 10, 2000Jan 22, 2002Victor Stanley, Inc.Locking mechanism for trash can receptacle and other doors
Classifications
U.S. Classification70/63, 206/484, 70/169, 206/303, 206/308.3
International ClassificationG11B23/03, B65D55/14, B65D55/02
Cooperative ClassificationB65D55/14
European ClassificationB65D55/14