IMPROVEMENTS IN LAMPS FOR ILLUMINATING ASTRONOMICAL CHARTS WHEN WORKING WITH THE TELESCOPE IN THE DARK
Year: 1884

page_text: JAMES WILLIAM HAYNES and WILLIAM WHIELDON of Number 42 Devonshire
Chambers Bishopsgate Street without in the City of London Engineers, do hereby
declare the nature of our invention for IMPROVEMENTS IN LAMPS FOR ILLUMINATING
ASTRONOMICAL CHARTS WHEN WORKING WITH THE TELESCOPE IN THE DARK to be
as follows:―
We construct a Lantern of suitable form, (with lamp to burn any ordinary
medium) and having a glazed front, preferably inclined to the base of the lamp,
the lantern is provided with a pair of Parellell grooves, and is furnished with one
or more reflectors, and magnifying glass, or microscope.
We construct our astronomical charts or maps of an uniform size and shape to
easily fit or slide into the parellell grooves of the lantern when they will be
made luminous & rendered visible by the light of the lamp being thrown on
to them.
We also make print or trace our charts in opaque ink and colors on a translucent
ground and vice-versa in which cases the light of the lamp is directed on to the
back of the chart, and only the translucent portions are illuminated.
In a convenient part of the lantern and attached or made thereto we have a
suitable receptacle to contain several charts in readiness for use.
We also make the charts or maps in a continuous strip or band and wound on
rollers attached to the lantern and by a simple turn of the rollers, the band is made
to pass panoramically before the observer.
This invention is also applicable to the illuminating of other maps prints
drawings or similar objects.
We construct the lantern of Tin, Brass, Iron, or other ordinary material and
the charts or maps of cardboard, thin metal plates or other suitable substance.
Dated this 2nd January 1884.
JAMES WILLIAM HAYNES.
WILLIAM WHIELDON.

page_text: COMPLETE SPECIFICATION.
We JAMES WILLIAM HAYNES and WILLIAM WHIELDON of 42 Devonshire
Chambers, Bishopsgate Street without in the City of London Engineers do hereby
declare the nature of our Invention for IMPROVEMENTS IN LAMPS FOR ILLUMINATING
ASTRONOMICAL CHARTS WHEN WORKING WITH THE TELESCOPE IN THE DARK and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
We construct a Lantern of suitable form (with lamp to burn any ordinary
medium) and having a glazed front, preferably inclined to the base of the lamp,
the lantern is provided with a pair of Parellell groves, and is furnished with one
or more reflectors, and magnifying glasses, or miscroscope.
We construct our Astronomical Charts or maps of an uniform size and shape
to easily fit or slide into the parellell grooves of the lantern when they will be
made luminous and rendered visible by the light of the lamp being thrown on
to them.
We also make print.or trace our charts in opaque ink and colors on a translucent
ground and vice-versa in which cases the light of the lamp is directed on to the
back of the charts, and only the translucent portions are illuminated.
In a convenient part of the lantern and attached or made thereto we have a
suitable receptacle to contain several charts in readiness for use.
We also make the charts or maps in a continuous strip or band and wound on
rollers attached to the lantern and by a simple turn of the rollers, the band is made
to pass panoramically before the observer.
This invention is also applicable to the illuminating of other maps prints drawings
or similar objects.
We construct the lantern of Tin Brass, Iron, or other ordinary material and the
charts or maps of cardboard, thin metal plates or other suitable substance.
When viewing the charts the lantern is held in the hand by suitable handles or
supports with the face or illuminated side towards the observer.
In another form the lantern is provided with a simple lens and the charts or
slides are inserted in an opening between the lens and the lamp (as in an ordinary
magic lantern) and the objects thus reflected and magnified are viewed upon
a fixed screen attached to the lantern and the whole is held in the hand by suitable
handles.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the saine is to be performed we declare that what
we claim is:-
1. The construction of a lantern to be held with the illuminated front or face
towards the observer.
2. The application of grooved, and rollers or spindles for holding the charts to
the lantern.
3 The employment of charts in the form of a band and the application of
translucent and other charts in connection with lanterns.
4 The combination of maps and charts with lanterns and general arrangement
substantially as hereinbefore described.
Dated this 1 day of October 1884.
J. W. HAYNES.
WILLIAM WHIELDON.