Improved Apparatus for Setting Out Angles especially applicable for Laying Down Courses on a Chart and for like purposes.
Year: 1896

page_text: Date of Application, 22nd Dec., 1896
Complete Specification Left, 22nd Sept., 1897-Accepted, 24th Dec., 1897
Improved Apparatus for Setting Out Angles especially applicable for
Laying Down Courses on a Chart and for like purposes. .
JOHN GEORGE LOVERING of 4 Michigan Avenue, Manor Park, in the county of
Essex Master Mariner do hereby declare the nature of this invention to be as
follows:-
My invention relates to improved apparatus for setting out angles especially
applicable for laying down courses on a chart and for like purposes whereby the
course of a vessel or the bearing of an object, or the desired degree to which a line
is to be inclined, is ascertained.
In carrying my invention into effect I take a straight edge rule, and on the
upper or flat surface and a little distance above the surface, I place or fix a rod
supported at both ends. Upon this rod I place a bearing or bearings which may
be either ball or plain. and adapted to move axially as well as horizontally along
said bar. To this bearing or bearings I fix a rod or series of rods, but preferably of the
Lazy Tong type. At the extremity of these rods or series of rods or lazy tongs I fix a
pointer, the rear end of which is slotted. Into the slot projects a pin or pins pro-
jecting from the pivot or pivots of the lazy tongs thereby keeping the pointer
truly at an angle of 90 degrees with the bar upon which the bearing or bearings
swivel and slide.
To the underside of this pointer I place a protractor adapted to turn upon a
stud projecting through the extremity of the lazy tongs and pointer where it is
clamped by a nut or similar device, thereby holding the protractor rigidly in the
desired position to which it is to be put.
The bar or bars, or lazy tongs may be replaced by a telescopic or any other
extending device.
My invention works as follows; supposing it is desired to find the course from
one given position to another; the straight edge is placed over the given positions
on the chart, the protractor, and pointer is drawn out or extended, and if necessary
moved along the bar to which the bearing or bearings swivel or slide, to the
nearest convenient meridian or parallel. The protractor and pointer are then
disconnected, by unscrewing the locking nut or similar device thereby allowing
the protractor to be placed with its lower edge parallel to a meridian or parallel
of latitude.
The nut is then clamped thereby rigidly fixing the pointer and protrator
together; the pointer will then indicate the course to be steered.
If it is desired to take or lay down a bearing of an object on the chart, set the
pointer to the number of degrees of the bearing or the protractor then place the
straight edge on or parallel to a meridian or parallel of latitude, and extend or
draw in the protractor as the case may be, until the lower edge of the protractor
cuts the object; A line drawn through the object, of which the bearing was taken
and along the lower edge of the protractor, will give the desired' bearing.

page_text: The above device may be applied to parallel rulers T squares or the like to
enable anyone to lay down a line to any desired angle.
Dated this 21st day of December 1896.
Improved Apparatus for Setting Out Angles especially applicable for
Laying Down Courses on a Chart and for like purposes.
.'
JOIN GEORGE LOVERING of Myrtle House Clarence Road Cardiff in the County
of Glamorgan (formerly of 4 Michigan Avenue Manor Park Essex) Master
Mariner do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
... 1
"
My invention relates to improved apparatus for setting out angles. especially
applicable to laying down courses on a chart and for like purposes, and in carry-
ing my invention into effect I take a straight edge rule and on the upper or flat
surface, and a little distance above the surface I place or fix a rod supported at
both ends. Upon this rod I, place a bearing or bearings which may be ball or
plain adapted to move axially as well as horizontally. along said bar. To this
bearing, or bearings I fix a rod or series of rods but preferably of the lazy tongs
type at the extremity of these rods or series of rods or lazy tongs I fix a pointer
the rear end of which is slotted. Into the slot at the rear end of the pointer pro-
jects a pin or pins fastened to the lazy tongs thereby keeping the pointer truly at
an angle of 90° degrees with the bar upon which the bearing or bearings swivel
and slide. To the under side of the pointer I place a protractor adapted to turn
upon a stud projecting through the extremity of the lazy tongs, and the centre of
pointer where it is clamped by a screw and nut or other similar device thereby
holding the protractor rigidly in any desired position.
The bar or bars or lazy tongs may be replaced by a telescopic or other similar device.
My invention works as follows; supposing it is desired to find the course from
one given position to another, the straight edge of rule is placed over the two
given positions on the chart, the protractor and the pointer are drawn or extended
and if necessary moved along the bar on which the bearing or bearing swivel and
slide. to the nearest. convenient parallel or meridian on the chart. The protractor
and pointer are then disconnected by unscrewing the locking nut or similar device,
thereby allowing the lower edge of the protractor to be placed parallel to a parallel
of latitude or to a meridional line; the nut is then clamped. thereby rigidly fixing
the pointer and protractor. The pointer will then indicate the desired course in
degrees on the edge or radius of the protractor. If it is desired to lay down a
bearing of an object on the chart, set the pointer to the number of degrees of bear-
ing on the protractor and clamp it with nut, then place the straight edge of the
rule, on or. parallel to, a parallel or meridional line on the chart, and extend or
draw in, the protractor as the case requires until the lower edge of the protractor
cuts the object of which the bearing was taken; then a line drawn along the edge
of the protractor and through the object gives the desired bearing.
In the drawing illustrating this invention Fig 1 represents plan of ruler
complete.
Fig 2 represents side elevation of straight edge and. raised bar.
Fig 3 & 4 represents side elevation and section of bearing or travellers on the
bar.
Fig 5 represents lazy tongs and nin

page_text: Fig 6 represents pointer.
Fig 7 represents plan of protractor and stud.
Fig 8 represents sectional elevation of protractor with stud and thumb screw.
Fig 9. represents section of pin or stud. or guide for pointer fixed on lazy tongs.
The letter a Fig 1 in the drawings is a metal or wooden straight edge of con-
venient length for the purpose required on which is fixed a raised rod 6, into the
end brackets c1 and c2. Fig. 1.
d1 & d2 Fig 3 are bearings or sleeves which are sufficiently loose as to permit
them, to slide or swivel, readily but without unnecessary play. from end to end. of
rod b Fig 1. e Fig 4 are the lazy tongs with either end or bar fitted in sleeves. d l'
&d 2 Fig 3. & 4., in such a manner as to allow d 1 & d2 to move to or from each
other as the extension or contraction of the lazy tongs would necessitate.
e is fitted with a stud or pin h fig 9 which pin works in slot g Fig 1 thereby keep-
ing pointer f at an angle of 90° to the bar bi Fig 7 represents a protractor cut to
180° and works in the extremity of lazy tongs by means of a stud j, which
stud is fitted with a nut and screw. attachment. k that the protractor may be
clamped at any desired angle. 12 Fig 8 shews section of protractor j2 section
of stud, and k2., nut and screw arrangement.
Having now. particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
First. In an improved device for setting out angles on a chart, especially appli-
cable for laying down bearings or setting courses or for like purposes, making an
instrument for that purpose by means of a straight edge or rule on which is
mounted a raised bar or rod supported at the ends, upon which rod, a lazy tongs
or other suitable rod or rods is made to swivel and slide, having at the extremity
of said lazy tongs a protractor made to swivel or turn in any direction on its axis,
said protractor having a hand or pointer attachment. which is maintained at an
angle of 90° to the before-mentioned bar. substantially as described and set forth.
Secondly. In an improved device for setting off angles and bearings by means
of a combination of straight edge raised rod. lazy tongs pointer and protractor
moving in any direction in its own plane, and capable of extension or contraction
as required, by means of the said lazy tongs: and at the same time capable of
heing moved laterally along the bar, substantially as and for the purposes set
forth.
Thirdly. The general construction arrangement. and combination of parts of
the improved device for setting forth angles and like purposes, substantially as
described and set forth in figures 1 to 9.
Dated this 20 day of September 1897
JOHN GEORGE LOVERING.