A locking industrial fastener comprises a hook-like keeper plate member having a keeper lip to be attached to one panel and a turn hasp member attached to another panel. The turn member comprises a sleeve member hinged to a fastening plate, a slide member which telescopically slides in the sleeve member, a cam pin operable in a cam opening in the sleeve member, a first disk rotatable in a circular opening in the sleeve member, a second disk fixed to the first disk, a spring disk fixed to the other disks, and a turning means.

BACKGROUND OF THE INVENTION 
The present invention relates to industrial fasteners and more particularly 
to those industrial fasteners that are used to pull and secure two panels 
together. 
At the present time there are a number of industrial fasteners commercially 
available to pull and secure together two panels, for example, two panels 
which meet in a butt joint. The panels may be, for example, portable 
enclosures, packing cases, instrument cases, transit cases, trunks, and 
other packages. Generally such fasteners consist of two separated members, 
each one of which is attached to one of the panels. For example, one panel 
may be a container lid and the other panel the container body. Such 
fasteners may be used to obtain a tight seal and may be used to compress a 
gasket positioned between the two panels. 
Two types of industrial fasteners are shown in U.S. Pat. No. 2,853,751 and 
U.S. Pat. No. 2,853,752, both to Ernest Schlueter and both assigned to 
Simmons Fastener Corp. U.S. Pat. No. 2,820,995 to Ernest Schlueter 
describes a "spring loaded link lock fastener" in which a hasp member is 
mounted on a spring wire pivot. An eccentric pin 66 is integral with a 
bolt 60 and engages in a transverse slot 68. The bolt is a solid member, 
for example, a relatively expensive casting, see FIG. 6 therein. 
Although the presently commercially available fasteners are satisfactory 
for many purposes, there has been a need for a suitable fastener which 
would be rugged and which would operate under adverse environments and yet 
which would not be relatively expensive or relatively complex. For 
example, an industrial fastener utilized on an instrument case for an 
electronic device for the military may be required to exert 90 lbs. of 
pulling pressure to pull down the case lid and be capable of resisting 300 
pounds of tension, tending to separate the lid. In addition, such a 
fastener is required to be able to be operated in arctic temperatures of 
70.degree. F. below zero and resist damage due to impact and dropping. 
SUMMARY OF THE INVENTION 
The present invention provides an industrial fastener in two members. The 
first member is a hook-like keeper plate member (engagement latch) which 
may be secured to one panel; for example, it may be secured to the lid of 
a container. The second member is a turn member which is an actuator 
secured to another panel; for example, it may be secured to the body of 
the container. 
The turn member actuator includes a hook-like lip portion which may be 
removably engaged with the curved portion hook-like lip portion of the 
hook-like member. A rotary member for example, a turning means having wing 
handles, of the turn member is given a 1/2 turn (180.degree.) to pull and 
lock the two panels together. 
The turn member comprises a number of parts, each of which may be formed 
from sheet metal, plated and heat-treated prior to assembly. Those parts 
include a base member which is a pivot carrying plate, a sleeve member 
(hasp member) hinged to the base, and a slide member which telescopically 
slides in the sleeve member and may be extended or withdrawn. A turning 
means has fingers held in opposed indentations in a disk which disk is 
held between a spring steel disk and another disk. The third-mentioned 
disk rotates in a hole in the sleeve member. A rivet holds the sleeve 
member, slide and the three disks together. The three disks are locked so 
that they rotate together by bosses which fit into, respectively, an 
indentation and a hole. When the turning means is turned, it turns the 
disks, as a unit, and the rivet. The rivet is offset and eccentric with 
respect to the center of movement ofthe disks and is within a cam slot of 
the slide so that the shank of the rivet cams the slide member, either to 
extend or to withdraw the slide member. 
FEATURES OF THE INVENTION 
It is a feature of the present invention to provide an industrial fastener 
comprising a hook-like member to be fastened to one panel and a turn 
member to be fastened to another panel. The turn member comprises a base 
member, a sleeve member having a central portion having therein an opening 
and opposed side portions forming a sleeve, and hinge means connecting the 
base member and the sleeve member to permit turning motion of the sleeve 
member relative to said base member. 
The turn member further comprises a slide member which slides within the 
sleeve, to be extended or withdrawn, and has a hook-like portion and an 
elongated cam opening. A first disk member of sheet metal, having a hole 
therethrough, fits within the opening in the sleeve member and is 
rotatable therein. A second disk member of sheet metal having opposed side 
indentations and a hole therethrough is attached to the first disk member. 
A third disk member of resilient steel and having a hole therethrough is 
attached to the second disk member. 
A cam member is connected through the holes in the first disk member, said 
second disk member and said third disk member and connects the three disks 
together. The cam member also protrudes through the sleeve member opening 
and the cam opening. 
The turn member further comprises turning means having finger portions 
which fit in the indentations and which turning means may be turned to 
move the cam member about the center of the sleeve member opening and 
within said cam opening. The cam member thereby slides and withdraws the 
slide member and pulls together the hook-like member and the turn member.

DETAILED DESCRIPTION OF THE INVENTION 
As shown in FIG. 1, the industrial fastener of the present invention has a 
hook-like member 10 which is attached to the first panel 11. For example, 
the panel 11 may be a portion of a lid of a container. The hook-like 
member 10 comprises a flat keeper plate portion 12 having two holes 
therethrough 13 and 14, and a curved turned-over hook-like keeper lip 
portion 17. The hook-like member 10 is attached to the panel by means of 
screws or other fastening devices inserted through the holes 13 and 14. 
As shown in FIG. 2, the turn member 20 is adapted to be connected to a 
second panel 21. For example, the second panel may be the body portion of 
a container. The turn member 20 includes a base member 22, which is a 
pivot carrying plate, having holes 23 and 24 therethrough, see FIG. 11. 
The base member 22 is attached to the second panel by means of screws or 
other fastenings through the holes 23 and 24. The base member has side ear 
flange portions 25 and 26 at respectively opposite sides of the base 
member. The flange portions 25 and 26 each have a hole, a bearing 
aperture, therethrough, respectively 27 and 28, through which an elongated 
pin 29 is secured. The pin 29 has a head 30 at one of its ends, on the 
outside of the flange portion 25, and a peened-over portion 30A outside of 
the opposite flange portion 26. 
The turn member 20 further comprises a sleeve member 31, see FIGS. 7 and 8. 
The sleeve member 31 has, as integral portions thereof, a central portion 
18 and a turned-over elongated tubular portion 32. The shank of the pin 29 
fits within the tubular portion 32 so that the sleeve member 31 is hinged 
and rotatable about the pin 29. The hinge means (comprising pin 29, 
tubular portion 32, holes 27,28 and flange portions 25,26) permits turning 
motion of the sleeve member 31 relative to the base member. 
The sleeve member 31 has two turned-over side edge flanges forming sleeve 
portions 33 and 34 on its opposite sides, the internal faces of which form 
a guideways. The sleeve member 31, at its central portion 18, includes a 
central circular opening 37 therethrough which is centered at a raised 
boss portion 39 and has an imaginary center. The sleeve member 31 is 
stamped from sheet metal, formed into its shape, and then plated and 
heat-treated after it is shaped. It will be noted that the sleeve member 
31 may be completely formed, plated and heat-treated prior to assembly of 
the fastener. 
A slide member 40 fits and slides within two side sleeve portions 33 and 34 
of the sleeve member 31, see FIGS. 9 and 10. The slide member 40 may be 
moved longitudinally within the slide formed by the sleeve portions 33 and 
34. The slide member 40 is a sheet metal rectangular member whose one end 
is bent up to form a hook-like lip portion 41. That hook-like portion 41 
may be engaged with the hook-like portion 17. The flat portion 42 of the 
slide member 40 has an elongated cam opening 43. A second generally 
U-shaped opening 44 in flat portion 42 forms a flexible and resilient 
tongue 45 having a small raised boss 46 at its end. The flat portion 
between the hook-like portion 41 and opening 44 may be lengthened to form 
a blade. 
A first disk member 50 is round in top view and its diameter is slightly 
less than the diameter of the opening 37, so that it fits within the 
opening 37, see FIG. 6. The first disk member 50 has a round hole 51 and a 
small protruding boss 52. The first disk member has an indentation 53 on 
its side opposite boss 52 and aligned therewith. The boss 46 on tongue 45 
removably fits in indentation 53 as a detent when the slide member 40 is 
withdrawn. 
A second disk member 55, round in top view, has a slightly larger diameter 
than the diameter of the first disk member 50, see FIG. 5. The second disk 
55 rides on top of the boss 39 and not within the opening 37. The second 
disk member 55 has a round hole 56 which is of the same diameter as the 
hole 51. It also has a small raised boss 57 and a small indentation 58 
behind the boss 57. The boss 52 of disk member 50 fits within the 
indentation 58. The second disk member 55 has opposite side indentations 
59 and 60. 
A third disk member 61 is of spring metal, for example, sheet metal of 
spring steel, and has a hole 62 which is of the same diameter as the holes 
56 and 61, see FIG. 4. The third disk member 61 has a smaller hole 63 
within which the boss 57 fits. 
The interlocking of the three disk members 50, 55 and 61, so that they 
rotate together as a unit and without slippage, is accomplished by the 
bosses 52 and 57 which fit within indentation 58 and hole 63, 
respectively. 
The turn member 20 also includes a butterfly member having wing handles as 
its turning means 65 and having inwardly protruding and opposed fingers 66 
and 67 which are square in cross-section and fit within the indentations 
69 and 59, respectively, see FIG. 3. The third disk member 61 holds the 
turning means in position and exerts spring pressure on its square fingers 
66,67 to tend to restore the turning means to either a flat or a raised 
position. 
A rivet 70 having a head 71 is utilized to connect and hold the turn in 
assembly, and the shank is the eccentric cam. The enlarged rivet head 71 
is sufficiently large so that its diameter is greater than the width of 
the elongated opening 43, which prevents the rivet from being pulled 
through the opening 43. The shank 72 of the rivet 70 protrudes through the 
opening 43 and also protrudes through the holes 51, 56 and 62. The top of 
the rivet (the end opposite the head 71) is peened over and forms an 
enlarged head above the hole 62 to hold the three disks 61, 55 and 50 
together. The rivet 70 is the eccentric cam means of the turn member and, 
when the turning means 65 is turned a half-turn, will move within the cam 
opening 43 and be rotated about the imaginary center of the opening 37. 
The shank 72 is off-set and eccentric in relationship to the center of 
opening 37. 
In operation, starting with the slide plate member 40 in its extended 
position, the user will rotate the sleeve member 31 on its hinge means 
until the hook-like portion 41 of the slide plate member 40 grips the 
hook-like portion (keeper lip) 17. The user then turns the turning means 
65 a half-turn clockwise, viewed looking down upon it. The rivet 70 is 
turned clockwise about the imaginary center of the three disk members, 
those disk members being aligned so that their centers lie on a common 
imaginary line. The rivet shank 72 pushes on the cam opening 43 and cams 
the withdrawal of the slide member 40 within the guide-ways of the side 
sleeve portions 33,34. At the end of the turning motion the slide member 
is completely withdrawn and the boss 46 moves into the indentation 53. 
To unlock the fastener the operation is reversed. The user turns the 
turning means 65 counterclockwise, causing the rivet shank 72 to rotate 
and thereby cam the slide member 40 to its extended position and turn the 
indentation 53 away from the boss 46. 
Modifications may be made in the above-described embodiment within the 
scope of the invention and within the scope of the sub-joined claims. For 
example, the wing handle of the turning means 65 may be replaced by 
alternative rotary members such as a screw driver slot in third disk 
member 61 or a hex nut fastened on top of third disk member 61. Another 
example of such a modification is the replacement of pin 29 by a wire 
spring which extends through holes 27,28 and tubular portion 32 and has 
its ends beyond the flange portions 25,26 as shown in U.S. Pat. No. 
2,820,995. Such a spring-mounted actuator may compensate for mounting 
inaccuracies and irregularities in the sealing surface or a gasket. As 
still a further such modification, the pivot-carrying base member may be 
recessed, as in U.S. Pat. No. 2,853,752, or have integral protective slide 
flange portions. 
The industrial fastener of the present invention may be used as a 
hinge-lock fastener. In such a hinge-lock fastener the turn member is 
fastened to one panel and the keeper plate is fixed to a blade portion of 
the slide member and fastened to a second panel. The fastener pivots about 
its hinge means and the panels are drawn closer together upon withdrawal 
of the slide member.