U.S. patent number 3,878,589 [Application Number 05/493,507] was granted by the patent office on 1975-04-22 for separable fastening device.
This patent grant is currently assigned to General Electric Company. Invention is credited to Henry A. Schaefer.
United States Patent |
3,878,589 |
Schaefer |
April 22, 1975 |
Separable fastening device
Abstract
Two objects are fastened together by a device having a base
plate with a cavity and an overhanging holder plate fastened to one
object, and having a cylindrical stud with an overhanging flange
fastened to the other object. The cavity, holder plate, stud, and
flange are shaped so that the two objects must be oriented in a
particular relation in order that the stud flange can be inserted
into the cavity. After insertion, a slight relative rotation of the
two objects fastens the two objects together in a pivotal
relation.
Inventors: |
Schaefer; Henry A. (Lynchburg,
VA) |
Assignee: |
General Electric Company
(Lynchburg, VA)
|
Family
ID: |
23960509 |
Appl.
No.: |
05/493,507 |
Filed: |
August 1, 1974 |
Current U.S.
Class: |
24/669; 24/702;
224/269; 224/272; 403/353; 455/351; 248/225.11 |
Current CPC
Class: |
A45F
5/021 (20130101); A45F 5/02 (20130101); Y10T
24/45812 (20150115); A45F 2005/026 (20130101); Y10T
24/45995 (20150115); Y10T 403/7015 (20150115) |
Current International
Class: |
A45F
5/02 (20060101); A45F 5/00 (20060101); A44b
017/00 () |
Field of
Search: |
;403/353
;24/222R,222S,23TC,23NP,21A ;248/223 ;224/5E,26R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gelak; Bernard A.
Claims
What I claim as new and desire to secure by Letters Patent of the
United States is:
1. A device for removably and pivotally fastening first and second
objects together, comprising:
a. a base plate having a surface having a cavity therein, said
cavity being bounded by a wall extending from a first point in the
vicinity of one edge of said base plate in a first straight line to
a second point, extending from said second point along a generally
circular arc for approximately 225.degree. to a third point, and
extending from said third point along a second straight line that
is parallel to said first straight line to a fourth point in the
vicinity of said one edge;
b. a holder plate having an opening therethrough that is bounded by
substantially parallel third and fourth straight lines extending
from an edge of said holder plate to interior points and by a
concave semicircular arc between said interior points, the distance
between said third and fourth parallel straight lines and the
diameter of said semicircular arc being substantially equal but
being less than the distance between said first and second parallel
straight lines;
c. means fastening said holder plate on said surface of said base
plate in a position so that said fourth straight line substantially
coincides with said second straight line, so that said
semi-circular arc overhangs said cavity and is concentric with said
generally circular arc, and so that said third straight line
overhangs said cavity and is substantially parallel to said first
straight line;
d. a cylindrical stud adapted to be fastened at one end to said
second object, said stud having a diameter slightly less than said
distance between said third and fourth straight lines to permit
said stud to pass therebetween;
e. and a substantially flat, generally circular flange
concentrically fastened to the other end of said stud, said flange
having a thickness less than the depth of said cavity and having an
edge formed by a straight line chord tangent to said cylindrical
stud and by a circular arc between the ends of said chord, said
circular arc having a diameter slightly less than the diameter of
said circular arc of said cavity so that the circular part of said
flange overhangs said stud.
2. The device of claim 1 wherein said cavity wall flares outward
from said first and fourth points in diverging directions to said
one edge of said base plate to facilitate insertion of said stud
flange.
3. The device of claim 1 wherein said cavity wall diverges from a
portion of said generally circular arc to provide notches, and
wherein said device further comprises a resilient spring positioned
in said notches to frictionally engage said stud flange.
4. The device of claim 1 wherein said cavity wall flares outward
from said first and fourth points in diverging directions to said
one edge of said base plate to facilitate insertion of said stud
flange, wherein said cavity wall diverges from a portion of said
generally circular arc to provide notches, and wherein said device
further comprises a resilient spring positioned in said notches to
frictionally engage said stud flange.
Description
BACKGROUND OF THE INVENTION
My invention relates to a fastening device, and particularly to a
fastening device that permits a radio receiver or the like to be
removably and pivotally fastened to apparel or the like.
A desirable feature of any portable device which is to be worn on
or carried by a person is that the device can be easily put on or
taken off by the person. Another desirable feature is that the
device can be pivoted or rotated while on the person so that the
device does not get in the person's way when the person is sitting,
walking, reaching into pockets, or performing other functions.
Portable radios are one such device that should have all of these
desirable features. Typically, such radios are rectangularly
shaped, and are five inches long or longer, two inches wide or
wider, and one inch or more thick. It is desirable that the radio
be easily fastened to and removed from the person's apparel, and
that the radio be pivotal through a fairly wide arc in order to be
kept out of the person's way when that person is performing some
function.
Accordingly, an object of my invention is to provide a new and
improved fastening device for pivotally carrying a radio or the
like on a person's apparel or the like.
A fairly specific object of my invention is to provide a new and
improved fastening device which has a structure that permits a
portable radio to be easily and removably fastened to an object or
wearing apparel.
SUMMARY OF THE INVENTION
Briefly, these and other objects are achieved in accordance with my
invention by a device comprising a base plate having a shaped
cavity and a holder plate which are attached to one object,
preferably the apparel of a person. The cavity and holder plate are
adapted to receive a stud with an overhanging flange attached to
the other object, such as a portable radio, when the objects are in
a relative orientation. After the stud and flange are inserted, the
radio is rotated to become pivotally fastened over a fairly wide
arc of rotation.
BRIEF DESCRIPTION OF THE DRAWING
The subject matter which I regard as my invention is particularly
pointed out and distinctly claimed in the claims. The structure and
operation of my invention, together with further objects and
advantages, may be better understood from the following description
given in connection with the accompanying drawing, in which:
FIG. 1 shows a perspective view of a fastening device in accordance
with my invention and as used on the apparel of a person and on a
portable radio to be carried by the person;
FIG. 2 shows an exploded, perspective view of the parts making up a
fastening device in accordance with my invention; and
FIGS. 3, 4, 5, 6, and 7 show views illustrating the operation of a
fastening device in accordance with my invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to FIG. 1, I show a preferred application for and a
preferred embodiment of a fastening device in accordance with my
invention. In this preferred application, my fastening device is
used to removably and pivotally fasten a portable radio to the
apparel of a person. However, it is to be understood that my
fastening device can be used in other applications. Because it is
relatively convenient to attach a device such as a radio to the
belt of the user, I prefer to attach a receptacle portion 10 of my
fastening device to a belt loop 11, formed of suitable material
such as leather. Similarly, I prefer to attach a fastening portion
12 to the object, such as a portable radio 13. FIG. 2 shows more
detailed views of the receptacle portion 10 and the fastening
portion 12. The receptacle portion 10 comprises a base plate 20, an
engaging spring 21, and a holder plate 22. The base plate 20 is
preferably molded as a single piece of plastic or metal, and has a
cavity 23 that starts near the upper edge of the base plate 20 and
extends toward the lower edge of the base plate 20. The cavity 23
does not go entirely through the thickness of the base plate 20,
but has a flat bottom surface as shown. At the top edge, the cavity
23 may begin with flared walls as shown. The significant part of
the cavity 23 begins at a first point near the top, from which a
first straight line wall 24 extends to a second point. At this
second point, the cavity extends along an arcuate or circular wall
25 for preferably at least 225.degree. to a third point. Part of
this circular wall 25 may be broken away or provided with notches
26 to receive the engaging spring 21. At the third point, the
cavity 23 extends along a straight line wall 27 to a fourth point
opposite the first point. The wall 27 is substantially parallel to
the wall 24. The diameter of the circular wall 25 is greater than
the distance between the parallel walls 24, 27, with the second
point (at the lower end of the wall 24) being tangent to the
circular wall 25. The holder plate 22 is formed of a thin piece of
metal having an opening 30 that starts at one side and that is
bounded by substantially parallel straight lines or edges 31, 32
and by a concave, semicircular, arcuate edge 33. The distance
between the straight edges 31, 32 and the diameter of the circular
or arcuate edge 33 are equal but somewhat less than the distance
between the walls 24, 27 forming the cavity 23. When the receptacle
portion 10 is assembled, the spring 21 is inserted in the notches
26 and the holder plate 22 fastened to the upper surface of the
base plate 20 by suitable screws or rivets passing through the
holes shown in FIG. 2. When the receptacle portion 10 is assembled,
the edge 32 of the holder plate 22 is substantially coincident with
the wall 27 of the base plate 20. The edge 31 is parallel to the
wall 24, and the arcuate edge 33 is generally parallel (or coaxial)
with the circular wall 25. However, the edge 31 of the holder plate
22 extends beyond the cavity wall 24, and the edge 33 of the holder
plate 22 extends beyond the cavity wall 25 to provide an overhang
which provides retention or fastening as will be explained.
The fastening portion 12 of FIG. 1 preferably has a suitable scuff
or back plate 36 for attachment to the object or radio 13. The
primary part of the portion 12 is a metallic stud 40 having a
cylindrical portion 41 and a partially circular overhanging flange
42. The overhanging flange 42 has an edge 43 which forms a straight
line chord which is preferably tangent to the cylindrical portion
41. An attaching head or element 44 is also provided for attaching
the stud 40 to the plate 36 which is fastened to the object or
radio 13. The stud 40 is dimensioned so that when it is in the
position shown in FIG. 2, it can be inserted into the receptacle
portion 10 with the edge 43 bearing against the cavity wall 27, and
with the cylindrical portion 41 passing between the edges 31, 32 of
the holder plate 22. However, this insertion requires that the stud
40, and the object 13 to which it is attached, be oriented in this
relatively precise position.
As indicated in FIG. 1, when the object 13 is to be removably
fastened to the apparel of the user, the object 13 must first be
rotated as indicated by the arrow 50 in a 180.degree. direction so
that the stud 40 can be inserted in the receptacle portion 10. The
stud 40 is then pushed downward until it bottoms against the
arcuate edge 33, after which the radio or object 13 is rotated as
indicated by the arrow 51. Reference to FIGS. 3, 4, 5, 6, and 7
will clarify this fastening operation. In FIGS. 3, 4, 5, and 6, the
holder plate 22 is in dashed outline form so that the stud 40 can
be seen in entirety to show how it is retained. In FIG. 3, the
radio or object 13 has been positioned so that the stud 40 has just
passed the flared walls of the cavity 23 and has begun to pass
between the straight walls 24, 27 of the cavity 23. FIG. 3 also
shows that in order to insert the stud 40, the relative shape and
dimensions of the stud 40, the cavity 23, and the holder plate 22
are such that the flange edge 43 must be adjacent and parallel to
the wall 27. In this regard, an arrow is drawn on the stud 40 and
points toward the top of the radio or object 13. Subsequently, the
radio 13 is pushed downward with the same orientation, until the
cylindrical portion 41 of the stud 40 engages the arcuate edge 33
of the holder plate 22 as shown in FIG. 4. In this condition, the
radio 13 is fastened, and may only be removed by withdrawing
directly upward and opposite the direction of the arrow shown in
FIG. 4. FIG. 5 shows the radio after it has been rotated
approximately 45.degree.. With this orientation, the flange 42 of
the stud 40 is retained by the overhanging portion of the holder
plate 22. This overhanging portion is provided because the circular
wall 25 of the cavity 23 is back or recessed beneath the arcuate
edge 33 and part of the straight line edge 32 of the holder plate
22. This retention is also shown by the cross-sectional view of
FIG. 7 which is taken along the lines 7--7 in FIG. 5. In this
condition, the flange 42 of the stud 40 is retained over
approximately 180.degree. of arc around the arcuate edge 33 of the
cover plate 22. Also in FIG. 5, it will be noticed that the flange
42 has begun to depress the spring 21. And finally, in FIG. 6, the
radio or object 13 has been rotated 180.degree. to its normal
vertical or upright position. In this condition, the flange 42 of
the stud 40 is retained over approximately 180.degree. of arc, and
is securely and pivotally fastened to the receptacle portion 10.
The freedom with which the object or radio 13 can pivot is
determined by the tension and dimensions of the engaging spring
21.
It will thus be seen that I have provided a new and improved device
for removably fastening a radio receiver or the like to a user's
apparel or the like. My fastening device is relatively simple, but
provides positive fastening with pivotal freedom. While my device
is quite simple, a feature which enhances its use and manufacture,
it is highly effective. While I have shown only one embodiment,
persons skilled in the art will appreciate that modifications may
be made. For example, the engaging spring 21 and its notches 26 may
be omitted. The device can be fashioned of almost any suitable
material having various dimensions for the operating surfaces,
depending upon individual preference. The flared openings of the
cavity 23 may be omitted. Further, the arcuate length of the
circular wall 25 may be varied, although a minimum of 225.degree.
is preferred. Therefore, while I have described my invention with
reference to a particular embodiment, it is to be understood that
modifications may be made without departing from the spirit of my
invention or from the scope of the claims.
* * * * *