Improvements in and in connection with Lens Caps.
Year: 1896

page_text: Date of Application, 4th Apr., 1896
Complete Specification Left, 28th Dec., 1896-Accepted, 27th Mar., 1897
PROVISIONAL SPECIFICATION.
Improvements in and in connection with Lens Caps.
We EDWIN HODGSON, of Number Four Worsley Grove, Stockport Road,
Levenshulme in the Parish of Manchester in the County of Lancaster Mercantile
Clerk and EDWIN HODGSON (nephew of the above named Edwin Hodgson) of
Number Six New Street, Miles Platting in the Parish of Manchester aforesaid
Mechanic do hereby declare the nature of this invention to be as follows:-
This invention is a spring lens cap to be fixed on the hood of the lens. At the
end of the spindle (on which a coil spiral spring works) is a lever by means of
which the said cap is opened and closed at the will of the operator. This cap is
suitable either for instantaneous or time exposures. The said cap is kept open by
means of a holder which is fitted on the side opposite to the lever. This holder is
V shaped at the end and rests on a pin fastened on the front of the said cap. As
soon as the lever is slightly pressed in a downward direction the holder is released
and the said cap closes."
The following is a detailed description of Figs. 1..2. 3 & 4 of drawing of
improvements in and in connection with lens caps.
A. is lever fastened on the end of spindle f for opening lens cap.
B. is front or cover of lens cap the inside of which will be black.
C. is pin on which holder d rests for the purpose of holding front or cover of lens
cap & open whilst focussing.
D. is holder which is V shaped at the end for the purpose of resting on pin c.
E. is small rivet on which holder d swings.
F. is spindle on which (1) the coil spiral spring 9 works and (2) the front and
back sections of lens cap are hinged.
G. is coil spiral spring for closing lens cap.
H. are the hinges joining together the front and back sections of lens cap.
1. is angle plate fixed on the back section j of lens cap for carrying holder d. In
the end of the said angle plate i which projects from the back section of lens cap j
is fastened small rivet e on which holder d swings.
J. is back section of lens cap the face of which will be black.
K. is flange on back section of lens cap; which flange is placed on the hood of
the lens. The inside of this flange is fitted with an india-rubber ring so as to make
a light tight connection between lens and lens cap.
L. is pin which fastens the hinges h and spindle ƒ together.
EDWIN HODGSON.
EDWIN HODGSON.

page_text: Improvements in and in connection with Lens Caps.
We EDWIN HODGSON of Number Four Worsley Grove Stockport Road
Levenshulme in the Parish of Manchester in the County of Lancaster Mercantile
Clerk and EDWIN HODGSON (nephew of the above named Edwin Hodgson) of
Number Six New Street Miles Platting in the Parish of Manchester aforesaid
Mechanic 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 :-
Our invention relates to improvements in and in connection with lens caps as will
be more clearly described hereinafter with reference to the drawings sent in with
Provisional Specification and consists of a lens cap with front and back sectious
B and J respectively which sections are hinged together by means of a spindle F
running along the bottom of both sections. The inside surfaces of these sections
are black so as to avoid all reflection. In the back section J is made a circular
opening on the outside of which opening is fastened a flange K which flange K is
fitted inside with an india-rubber ring. This india-rubber ring secures a light tight
connection between lens and lens cap. The lens cap is fixed on the hood of the
lens by means of this flange K. The spindle F projects on the left side so that a
lever A which serves to open the lens cap may be fastened on such projection.
Between the hinges H is placed a coil spiral spring G one end of the spring G
being fastened to the front section B and the other end to the back section J of
the lens cap. The right side of the lens cap is fitted with a holder D and small
pin C for keeping the lens cap open whilst focussing and also during prolonged
exposures. The holder D which is V shaped at the end swings on a small rivet E
which is fixed in an angle iron I fastened on the right side of the back section J of
the lens cap. The small pin C on which the holder D rests is fastened in the
right side of the front section B of the lens cap.
In order to use this lens cap press down the lever A and place the holder D upon
the pin C fastened in the right side of the front section B of the lens cap. When
the focussing is complete again press down the lever A and the lens cap will
instantly close. As soon as the dark slide has been placed in position in the camera
and the operator is ready to expose the sensitized plate the lever A is again
pressed down and the exposure made. This lens cap is suitable either for
instantaneous or time exposures.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
Improvements in and in connection with lens caps as herein described in reference
to and shewn in the drawings left with the Provisional Specification figured 1. 2. 3
and 4 and lettered A. B. C. D. E. F. G. H. I. J. K. L. respectively.
Dated this Twenty-fourth day of De
11000
EDWIN HODGSON.
EDWIN HODGSON.