U.S. patent number 3,866,232 [Application Number 05/422,102] was granted by the patent office on 1975-02-11 for automotive-vehicle windshield with built-in active-antenna system.
This patent grant is currently assigned to Flachglas Aktiengesellschaft Delog-Detag. Invention is credited to Paul Weigt.
United States Patent |
3,866,232 |
Weigt |
February 11, 1975 |
Automotive-vehicle windshield with built-in active-antenna
system
Abstract
A safety-glass windshield has at least one antenna wire imbedded
in its plastic core layer. One of the glass lamina is formed with a
tapered throughgoing hole having a narrow mouth on the inside
surface of the windshield. The antenna wire terminates at the
recess formed by this hole and has its end there imbedded in a mass
of conductive lacquer. An active-circuit capsule shaped as short
cylinder is connected via leads to the car radio and has a
plurality of spring feet which fit snugly into the recess while the
face of the capsule lies against the windshield over this recess.
The feet diverge away from the capsule and have bent-over ends so
that the capsule can be plugged into the recess, at least one of
the feet forming a connection between the conductive lacqer mass
and electronic components within the capsule.
Inventors: |
Weigt; Paul (Gelsenkirchen,
DT) |
Assignee: |
Flachglas Aktiengesellschaft
Delog-Detag (Gelsenkirchen, DT)
|
Family
ID: |
6634387 |
Appl.
No.: |
05/422,102 |
Filed: |
December 5, 1973 |
Foreign Application Priority Data
Current U.S.
Class: |
343/713;
343/701 |
Current CPC
Class: |
B60J
1/02 (20130101); H01Q 1/1271 (20130101) |
Current International
Class: |
B60J
1/02 (20060101); H01Q 1/12 (20060101); H01q
001/32 () |
Field of
Search: |
;343/711,712,713,701 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Lieberman; E.
Attorney, Agent or Firm: Ross; Karl F. Dubno; Herbert
Claims
I claim:
1. In a motor vehicle having a radio the improvement comprising the
combination of:
a window glass formed with a recess;
an antenna element bonded to said window glass and having an end at
said recess;
an active-circuit capsule having active electronic circuit
components connectable to said radio and having at least one
formation resiliently engageable and form-fitting in said recess
with said capsule lying on said window glass over said recess;
and
means between said components of said capsule and said end of said
antenna in said recess for connecting same together.
2. In a motor vehicle having a radio the improvement comprising the
combination of:
a window glass formed with a recess;
an antenna element bonded to said window glass and having an end at
said recess;
an active-circuit capsule active electronic circuit components
connectable to said radio and having at least one foot resiliently
engageable in said recess with said capsule lying on said window
glass over said recess; and
means between said components of said capsule and said end of said
antenna in said recess for connecting same together,
said recess having a mouth at a surface of said window glass and is
tapered toward said mouth.
3. The improvement defined in claim 2 wherein said capsule has a
plurality of such feet inwardly elastically deflectable toward one
another when fitted into said recess.
4. The improvement defined in claim 3 wherein said window glass
comprises a pair of glass layers and a plastic layer sandwiched
therebetween, one of said glass layers being formed with a
throughgoing hole constituting said recess, said antenna element
being a wire imbedded in said plastic layer.
5. The improvement defined in claim 4 wherein said end of said
element projects from said plastic layer into said recess.
6. The improvement defined in claim 5, further comprising a
conductive mass at least partially filling said recess and in
electrical contact with said end.
7. The improvement defined in claim 6 wherein said means includes
at least one of said feet, said one foot being electrically
conductive and being connected on one side to said components and
being imbedded on the other side in said mass.
8. The improvement defined in claim 7 wherein said feet are
angularly equispaced about and equispaced from an axis centered on
said recess, said capsule having a flat face engageable with said
window glass over said recess and said feet projecting from and
diverging away from said face.
9. The improvement defined in claim 8 wherein said feet are bent
inwardly toward each other at their ends remote from said face.
10. The improvement defined in claim 9 wherein said feet are formed
of elastically resilient metal strips.
Description
CROSS-REFERENCE TO RELATED APPLICATION
This application is related to the subject matter of commonly
assigned patent application Ser. No. 365,078 filed may 30, 1973 by
Paul Derner now abandoned.
FIELD OF THE INVENTION
The present invention relates to a windshield antenna system. More
particularly this invention concerns an active-antenna arrangement
for an automotive vehicle having a radio.
BACKGROUND OF THE INVENTION
The use of an antenna built right into the vehicle windshield
solves the problems of damage to an external antenna as well as
improving the vehicle's appearance by eliminating this element
which usually breaks up the lines of the vehicle. Such an antenna
is usually a fine wire bonded to or imbedded in the front
windshield along an upper or lower edge thereof.
One of the difficulties of such as antenna is that the signal
output is relatively weak, and the antenna is rarely properly tuned
for a particular band. Thus resort has been had as described in the
above-identified application to an active antenna which has an
antenna element connected to an active circuit that tunes and/or
amplifies the signal output. The active circuit must be provided
right at the antenna, so that this circuit is according to the
earlier application built right into the windshield and is
connected to an electric power source usually derived from the
radio.
This active circuit is often tuned to a particular radio so that it
cannot be used if the radio is changed. In addition it occasionally
fails so that it must either be replaced or a new antenna mounted
on the vehicle.
OBJECTS OF THE INVENTION
It is therefore an object of the present invention to provide an
improved windshield antenna system.
Another object is the provision of an active antenna arrangement
for a motor vehicle having a radio.
A further object is to provide such an active antenna which
overcomes the above-given disadvantages.
SUMMARY OF THE INVENTION
These objects are attained according to the present invention in an
antenna arrangement comprising an antenna element or wire imbedded
in the windshield or other window of the vehicle. The active
circuit is formed of electronic circuit components encapsulated in
a body which overlies a recess formed in the window at the end of
the antenna element with a foot on the body snugly received in the
recess. Thus this encapsulated active circuit plugs into the window
glass. Means is provided to connect the electronic components of
the active circuit to the antenna element.
In accordance with further features of this invention the foot
which is retained in the recess to hold the circuit body on the
inside face of the window is formed of a plurality of resilient
members which are elastically deformed inwardly by the recess. This
recess according to another feature of this invention is outwardly
tapered so that it is narrower at its mouth than in its interior.
Thus, the resilient members expand within the recess to secure the
body snugly to the windshield.
Accordingly to yet another feature of this invention the recess is
filled with a conductive lacquer and at least one of the resilient
members is a conductor connected to one of the electronic
components so that when imbedded in the lacquer it forms a good
electrical connection between that component and the antenna
element whose end is also imbedded in the lacquer.
The window glass or windshield according to a further feature of
the present invention is of the so-called safety-glass type having
a pair of glass layers sandwiching a synthetic-resin sheet that
adheres strongly to both sheets but which is plastically deformable
so that when broken the glass layers do not fly apart. The recess
is formed as a hole in the inside glass layer and the antenna
element is a wire imbedded in the synthetic-resin intermediate
layer.
DESCRIPTION OF THE DRAWING
The above and other objects, features, and advantages of the
invention will become more readily apparent from the following
description, reference being made to the accompanying drawing in
which:
FIG. 1 is an elevational partly diagrammatic view of a windshield
assembly according to the present invention;
FIG. 2 is a section taken along line II -- II of FIG. 1; and
FIG. 3 is a perspective back view of the active-circuit capsule in
accordance with the present invention.
SPECIFIC DESCRIPTION
FIG. 1 shows a window 1, here a windshield, mounted in a motor
vehicle having a frame indicated schematically at 11. The
windshield 1 is formed of a pair of glass sheets 1' and 1"
separated by a layer 14 of plastically deformable synthetic resin
in which is imbedded a pair of antenna wires 2 each having a
horizontal stretch 2' extending along and parallel to the upper
edge of the windshield, and an upright stretch 2" which drops
vertically down in the center of the windshield 1 and terminates in
a hole 4 of frustoconical shape formed in the inner plate 1' as
shown in FIG. 2.
The vehicle has a radio 12 which is connected via leads 13 to an
active-circuit capsule 3 formed as a short cylinder and having a
back face 6 adapted to overlie the outer narrow mouth of the recess
4. This capsule includes electronic circuit components as shown at
6' in FIG. 3 and has an axis A about which are spaced on its back 6
three feet 5 which are angularly equispaced and outwardly spread
and formed with inwardly bent ends 7. These feet are adapted to
engage in the hole 4 as shown in FIG. 3 to retain the capsule 6
flat against the fact of sheet 1'. Each foot 5 is formed of a short
spring steel strip and one of the feet at least is coated with
copper and connected to one of the elements 6'.
The ends 10 of the conductors 2 are bent up on the recess 4 and
imbedded in a mass 8 of a conductive lacquer. In this manner the
foot or feet constitute an electrical connector between the antenna
elements 2 and the circuit elements 6'. The capsule 3 is either
pressed into place before the lacquer 8 hardens, or a lacquer is
used which remains sufficiently soft to be pierced by the feet 5. A
small axially protruding point 16 can serve as electrical connector
in addition to or instead of the feet 5.
The arrangement according to this invention is extremely simple and
inexpensive to manufacture. The active circuit capsule 3 is easily
applied to the windshield for hookup of the built-in antenna, and
this capsule can even be changed without replacing the
windshield.
* * * * *