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This article describes a two-piece over-center latch which can be assembled, installed, operated and removed without the use of tools or auxiliary fasteners.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
76% of the total text.
Page 1 of 2
Two Piece Snap On Over Center Latch
This article describes a two-piece over-center latch which can be assembled,
installed, operated and removed without the use of tools or auxiliary fasteners.
Referring to the drawings, the latch includes a serpentine spring 10 which
can be characterized as a pair of spaced two-shaped sections 12 and 14 joined
by a curved bight 16. The ends of the spring 10 are bent outwardly to define
axles 18 and 20.
The second member of the latch is sheet metal member 22 having split rolled
ends 24 and 26 for receiving the axles 18 and 20. The member 22 includes an
integral handle or tab 28 and a hook-shaped tip 30.
The spring 10 and sheet metal member 22 are assembled simply by
squeezing the sides of the spring together until the axles 18 and 20 can be
slipped into the openings defined by the rolled ends 24 and 26.
To install the assembled latch in a machine, the spring 10 is
snapped onto a cylindrical bar 32, shown in phantom in Fig. 1 and in
cross-sectional view in Figs. 2 and 3. Preferably, bar 32 is an
integral member in a machine base. Referring to Figs. 2 and 3, the
latch can be used to provide a vertical retaining force on a plate 34
which rests at least partially on a locating pin 36. Pin 36 serves
both to position the plate 34 and to prevent its horizontal movement.
In Fig. 2, the latch is shown in a released position. To move the
latch into its closed or retaining position, the sheet metal member
22 is rotated in a counterclockwise...