U.S. patent number 3,660,762 [Application Number 04/847,853] was granted by the patent office on 1972-05-02 for apparatus and method for transmitting messages to vehicles in preselected off the highway areas.
Invention is credited to Darrell S. Smith.
United States Patent |
3,660,762 |
Smith |
May 2, 1972 |
APPARATUS AND METHOD FOR TRANSMITTING MESSAGES TO VEHICLES IN
PRESELECTED OFF THE HIGHWAY AREAS
Abstract
A transmitter operatively mounted for transmitting prerecorded
messages to mobile radio receivers within a predetermined area,
sign adjacent the area to indicate the frequency of the transmitter
and condition responsive means, such as a pressure-sensitive
switch, for causing the transmitter to transmit at least one
complete message upon the occurrence of the condition, such as an
automobile passing over the pressure-sensitive switch.
Inventors: |
Smith; Darrell S. (Cut Bank,
MT) |
Family
ID: |
25301661 |
Appl.
No.: |
04/847,853 |
Filed: |
August 6, 1969 |
Current U.S.
Class: |
455/41.2;
340/905; 455/526; 455/517 |
Current CPC
Class: |
H04B
5/00 (20130101) |
Current International
Class: |
H04B
5/00 (20060101); H04h 001/00 () |
Field of
Search: |
;325/51,54,117,312
;340/22,31,31A,32,38R,272,224 ;179/82 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Safourek; Benedict V.
Claims
What is claimed is:
1. Apparatus for the volitional transfer of intelligence to
vehicles in a preselected off-the-highway area comprising:
a. radio frequency transmitting means operatively mounted adjacent
said off-the-highway area and pretuned to a desired radio frequency
within the broadcast band for transmitting a low power radiation
signal within a predetermined relatively small area substantially
coextensive with said off-the-highway area upon actuation thereof
and including modulating means for modulating said transmitted
signal with a desired message;
b. an antenna system connected to the transmitting means and
constructed so that the said low power radiation signal is
sufficiently strong throughout said off-the-highway area for
adequate reception thereof by mobile radios, the transmission area
of said antenna system generally coinciding with said
off-the-highway area;
c. means mounted adjacent said off-the-highway area indicating the
presence of said intelligence transferring apparatus and said
desired broadcast band frequency for informing observers to allow
tuning of a mobile radio carried by said vehicle;
d. switching and maintaining means connected to said transmitting
means for actuating said transmitting means upon operation of said
switching and maintaining means, said switching and maintaining
means maintaining said transmitting means actuated for at least the
time required to transmit the desired message one complete time;
and
e. vehical sensing means connected to said switching means and
mounted adjacent said indicating means for operating said switching
and maintaining means in response to the presence of a vehical
within said off-the-highway area.
2. Apparatus as set forth in claim 1 wherein the antenna system
includes a loop positioned generally horizontally below the surface
of the ground.
3. Apparatus as set forth in claim 1 wherein the vehical sensing
means includes a pressure-sensitive switch disposed so that
vehicals pass thereover when observing the indicating means.
4. Apparatus as set forth in claim 1 wherein the modulating means
includes tape playback apparatus having a continuous tape cartridge
therein.
5. A method of transferring prerecorded intelligence upon command
by way of a mobile radio carried by a vehical including the steps
of:
a. selecting an off-the-highway area accessible to vehicals;
b. providing a radio frequency transmitter for transmitting a low
power radiation signal, including record playback apparatus for
modulating a transmitted signal with a desired message, and
pretuning said transmitter to a desired radio frequency
approximately in the broadcast band for transmitting said signal
within a predetermined relatively small area generally coinciding
with said off-the-highway area upon actuation thereof;
c. placing a prerecorded message in said record playback apparatus
which message contains information of interest to individuals
adjacent said off-the-highway area;
d. operatively mounting said transmitter adjacent said
off-the-highway area so that the transmitting area generally
coincides with said off-the-highway area accessible to said
vehicals;
e. indicating said off-the-highway area and said desired radio
frequency to vehicals generally adjacent said off-the-highway
area;
f. positioning generally within said off-the-highway area vehical
sensing means operable for actuating said transmitter to transmit
said prerecorded message at least one complete time;
g. connecting said actuating means to said transmitter; and
h. transmitting said prerecorded message each time said actuating
means is operated said prerecorded message being returned to its
beginning upon completion of said transmission.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
Because of the great number of automobiles and other mobile units,
such as trucks, boats, airplanes, snowmobiles, etc., and because of
the amount of time spent traveling in these mobile units, it is
often desirable to transfer information to the occupants of the
mobile units advising them of scenic views, historic sites,
facilities and accommodations, points of interest, travel hazards,
and many many other types of intelligence of general interest to
people traveling in a particular area.
2. Description of the Prior Art
In the prior art the most general manner of transferring
intelligence of general interest to passersby is the brochure. To
obtain this information a passerby or traveler must find the place
where the brochures are stored, leave his mobile unit to obtain a
copy of the brochure and then return to his mobile unit and spend
time reading the brochure. In many instances it is difficult to
read the brochure and simultaneously view the subject matter to
which it refers.
Other prior art methods of transferring information to occupants of
mobile units include devices such as large signs visible from the
mobile unit which may be read as the mobile unit passes the
location or as the traveler views the scenic or historic site. In
general these methods of transferring information are undesirable
because they are inconvenient and generally add little aesthetic
value to the landscape.
SUMMARY OF THE INVENTION
The present invention pertains to apparatus for the volitional
transfer of intelligence including a radio frequency transmitter
operatively mounted to transmit a message-bearing signal to a
predetermined area with condition responsive means attached thereto
for actuating the transmitter upon the occurrence of a condition
generally relating to the presence of a mobile unit and means
mounted adjacent the area for apprising occupants of a mobile unit
of the frequency of the transmitter. The invention further pertains
to a method of transferring intelligence utilizing a transmitter
constructed to be actuated by mobile units.
It is an object of the present invention to provide improved
apparatus for the volitional transfer of intelligence to occupants
of mobile units.
It is a further object of the present invention to provide an
improved method of transferring intelligence upon command by way of
a mobile radio receiver.
It is a further object of the present invention to provide
apparatus and method for transferring intelligence to occupants of
mobile units with increased efficiency and convenience.
These and other objects of this invention will become apparent to
those skilled in the art upon consideration of the accompanying
specification, claims and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Referring to the drawings, wherein like characters indicate like
parts throughout the figures:
FIG. 1 is view in perspective of the present apparatus in operative
position; and
FIG. 2 is a block diagram of the electrical circuitry in the
present apparatus.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In the figures the numeral 10 generally designates a roadside area
over which it is desired to transmit a message. The roadside area
10 is the entrance to a scenic or recreation park, a scenic
overlook, a parking or resting area, etc. The message to be
transmitted over the roadside area 10 is of general interest to
occupants of automobiles and other vehicles passing the roadside
area 10 and may be, for example, description or history of a scenic
view, park regulations or points of interest, information as to
facilities, camp sites, etc., information as to road conditions
and/or weather conditions, etc. The apparatus for the volitional
transfer of intelligence within the roadside area 10 is generally
designated 11.
Apparatus 11 includes means 12 for indicating the radio frequency
of the transmitted message, an antenna system 13, electronic
circuitry 14, and condition responsive means 15. In the present
embodiment the means 12 for indicating frequency of the transmitted
message is a small prominently displayed sign adjacent the entrance
to the roadside area 10. In general, the means 12 will be formed of
any convenient material and in any convenient manner so as to be
quickly and easily discernible from a mobile unit or vehicle
passing or entering the roadside area 10.
While the area over which it is desired to transmit a message is
illustrated as roadside area 10 in the present embodiment, it
should be understood that the configuration and position of the
desired transmission area are not critical and will be restricted
only by the area and position over which the message is of
interest. Further, the apparatus 11 is not limited to use in
conjunction with automobiles but may, in special circumstances, be
adapted for use with many other mobile units, such as airplanes,
boats, snowmobiles, etc., the only limitation being that a radio
receiver is required in the mobile unit. Examples of other
commodious areas are elongated expanses including several miles of
road (generally scenic or historic area), areas of road preceding
particular situations which a motorist should be aware of such as
construction or detours, areas of road adjacent but not passing
through towns or other scenic area, etc. Some of these embodiments
will be described in more detail in conjunction with the
description of the apparatus 11.
Referring specifically to FIG. 2 a block diagram of the antenna
system 13, electronic circuitry 14 and condition responsive means
15 is illustrated to show one possible connection thereof. In this
embodiment, the electronic circuitry 14 includes a transmitter 20
having a record playback unit 21 connected thereto through a
modulator 22. A power supply 23 is connected through a switch
circuit 24 to the transmitter 20 and record playback 21. The
condition responsive means 15 is operatively connected to the
switch circuit 24 so that the switch circuit 24 operates upon the
response of the means 15 to the condition to which it is sensitive.
In FIG. 1 the condition responsive means 15 is illustrated as a
pressure-sensitive conduit extending across the entrance to the
roadside area 10 so that the entrance of a vehicle to the roadside
area 10 causes a pressure in the responsive means 15, which in turn
operates the switch circuit 24. Many other condition responsive
means 15 might be utilized, such as light-sensitive devices,
proximity switches, sound detectors, etc., to sense the presence of
a mobile unit in the transmission area.
The power supply 23 is a battery pack or a suitable rectifying and
filtering unit adapted to be connected to a suitable source of
convenient electrical power. The particular type of power supply 23
utilized will depend upon the position of the apparatus 11 and the
availability of power thereto. Because the apparatus 11 is only in
operation when it is triggered by a mobile unit in the transmission
area, the power output requirements of the power supply 23 are
relatively small and may vary in accordance with the number of
mobile units entering the transmission area in a given unit of
time. In the present embodiment the switch circuit 24 is connected
between the power supply 23 and the remainder of the circuits in
the electronic circuitry 14 since this is the most efficient
connection for conserving power. However, many other circuits might
be designed for energizing the electronic circuitry 14 at the
desired time.
Upon operation of the switch circuit 24 power is supplied from
power supply 23 to the transmitter 20 and the record playback unit
21 so that a prerecorded message in the record playback unit 21 is
transmitted to the transmission area. In general, the record
playback unit 21 is some type of unit in which the prerecorded
message returns to the beginning upon the completion thereof. An
example of this type of playback unit is a tape playback unit
utilizing continuous tape-type cartridges.
In the present embodiment the transmitter 20 is an amplitude
modulated transmitter operating on a frequency in the broadcast
band, that is from 540 kilocycles to 1,600 kilocycles. It should be
understood that other types of modulation and different frequencies
might be utilized but most automobiles and the like, at the present
time, have radio receivers therein which are AM receivers tunable
throughout the broadcast band. To transfer a message to the largest
segment of the traveling population it is, therefore, the simplest
and most efficient, at the present time, to utilize AM transmission
in the broadcast band. A particular transmitter 20 in a given area
is tuned to a frequency which will not disturb or interfere with
the transmission of local radio stations or adjacent similar
apparatus 11. Also, it is imperative that local radio stations or
adjacent similar apparatus 11 do not interfere with the signals
transmitted by the transmitter 20. Since the transmitter 20 in the
apparatus 11 is designed with a limited range, in general the range
coincides as closely as possible with the relatively small area
over which it is desired to transmit the signal and will comply
with F.C.C. Rules and Regulations governing "Low Power Radiation
Devices," the proper selection of transmission frequency generally
eliminates any interference problems.
The antenna system 13 is, in general, designed for the specific
area over which it is desired to transmit a signal. Where the
apparatus 11 is mounted in relatively secluded areas and vandalism
may occur, it is desirable to utilize an antenna system 13 which is
hidden or otherwise inaccessible. Several suitable types of antenna
systems 13 have been developed through experimentation. If the
transmission area is relatively large, a loop antenna can be buried
beneath the surface of the ground, generally in a horizontal plane,
approximately in the center of the area or so that the transmitted
signal is sufficiently strong throughout the area. If the
transmission area is, for example, an elongated stretch of road,
the antenna system 13 may include a piece of transmission line
generally coextensive with the road lying beneath the surface of
the ground adjacent thereto. In areas which are not secluded, such
as park entrances, and the like, or if it is desired to mount the
entire apparatus 11 on a mobile unit for ease of movement to
changing areas (for example, to keep the public informed about
detours, etc.), a whip antenna may be utilized as the antenna
system 13. In some areas it has been found that the sign
designating the particular frequency of the transmitter 20 may be
mounted on a metal pole, which pole may also serve as the antenna
system 13. Thus, a variety of antenna systems 13 may be utilized
and they should be constructed so that the transmission area or
pattern covers the area over which it is desired to transmit the
signal so that the transmitted signal is sufficiently strong
throughout the predetermined area for adequate reception
thereof.
Thus, apparatus is disclosed for the volitional transfer of
messages without the need for spending substantial periods of time
reading large unsightly signs or brochures. The transfer of
intelligence is provided to the occupants of a mobile unit through
a standard radio receiver in the mobile unit. Through proper
mounting of the apparatus, vandalism and the like is substantially
eliminated. Further, because the apparatus is not operating
continually but only upon demand, the apparatus can be installed in
remote areas and the like and left without maintenance or
supervision for long periods of time.
* * * * *