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2 Sheets—Sheet 1. S. P. MATHER.
Submarine Telescope and Lamp.
No. . Patented April 16 1845.
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N. PETERS. PholhLillwgnpher. WaSlegiOn D.C.
No. .
S. P. MATHER.
Submarine Telescope and Lamp.
2 Sheets—Sheet 2. Patented April 16 1845.
N. PETERS. PhotOUIflOgnphar. Washington. MC.
SARAH P. MATHER OF BROOKLYN NEW YORh.
SUB1VMAIRINE TELESCOPE.
Specification of Letters Patent No.  dated April 16 1845.
To all whom it may concern:
Be it known that I SARAH P. M IHER
of Brooklyn in the county of Kings and
State of New York have invented a new
5 and useful Improvement or Apparatus for Examining Objects Under the Surface of the Water  and I do hereby declare that the following is a full clear and exact description thereof reference being had to the ac
10 companying drawings in which
Figure 1 is a submarine lamp Fig. 2 is a submarine telescope. Fig. 3 section of Fig. 1. Fig. 4 section of Fig. 2 longitudinally through the tubes.
15 The nature of my invention consists in constructing a tube with a lamp attached to one end thereof so as to be sunk in the water to illuminate objects therein and a telescope to view said objects andmake ex
20 amnatxons under water.
The construction of these instruments is
as follows  The lamp which I denominate
submarine is composed of a tube A Figs. 1
and 3 formed of several joints which are
25 screwed together with leather or other suit
able washers between them to make the
joints water tight the lower joint should be
somewhat larger than the others as repre
sented in the drawing and to its lower end
30 is cemented a glass globe I said globe hav
ing an aperture with a neck surrounding it
at top for that purpose (this is most clearly
represented in Fig. 3) at its bottom there
is also another opening around which the
35 top of the reservoir (b) is fastened this
reservoir contains the socket of the lamp
when one is used or sustains any of the
other apparatus for making light that would
be suitable such as the Drummond or other
40 powerful light. The tube can be extended to
any desired length by adding more joints to
it and it should have a' slight taper toward
the top on each side of the main tube A
that forms the chimney of the lamp there is
45 a smaller tube X that descends parallel
with tube A to the globe of glass I which
they curve outward around and enter the
reservoir (b) below these tubes are for the
purpose of supplying air to the lamp and
50 preventing the collapse of the flue or tube
A there are several curved rods &c. extend
ing from the lower joint of tube A to the
reservoir (b) that serve as guards to pre
vent the globe from getting broken. At the
55 bottom of the reservoir there is a staple or
hook (a) by which the lamp is sunk either
bar a weight attached thereto  or by means of a coed and pulley connected with an anchor below. The tubes X are united to the main one by crossbraces N extending 60 from one to the other at proper intervals. To use the above described lamp the depth of the objects to be examined under water should be ascertained and as many joints of the chimney A and side tubes X are then 85 screwed together as will extend down the required distance the lamp or other light is fired in any convenient way either before or after the tubes are put together and the whole is lowered into the water the weight 70 at the bottom causing it to sink but if the water is very deep or the current so strong as to render the handling of the apparatus difficult an anchor is to be thrown out with a pulley affixed thereto by which the lamp 75 is hauled down. To the lamp H there is attached a reflector K inside the globe which throws the light in any given direction. It is of common construction and can be made to turn around the lamp. 80
The telescope is constructed with a similar tube B with side pipes (L) see Figs. 2 and 4 to the lamp just described but instead of the lamp and glass globe its lower end is furnished with a tumbler shaped glass K' 85 which is covered by a case only open on one side as shown in the Fig. 2 or it may be only a glass window set in one side of the lower joint the small tubes (L) connect with the bottom of the telescope and are for the pur 90 pose of preventing the collapse of the main tube in the lower part and opposite the window K' there is a small mirror K? hung so as to turn on an axis a wire or cord is connected with this mirror that extends up 95 to the top of the telescope by means of which the mirror can be turned to any angle desired this instrument can be handled and sunk by a similar apparatus to the lamp as move described. In examining at great loft depths there can be a telescope introduced at the upper end of tube B.
It will at once be obvious that the above named lamp and telescope can be used for various purposes such as the examination  of the hulls of vessels to examine or discover objects under water for fishing blasting rocks to clear channels for laying foundations or geological formations the lamp being used for lighting the objects
lf 4f
while inspected by the telescope.
Having thus fully described my improve