Improvements in Photographers' Printing Frames.
Year: 1888

page_text: Date of Application, 20th Nov., 1888
Complete Specification Left, 20th Aug., 1889-Accepted, 9th Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in Photographers' Printing Frames.
I, ALBERT TOWERS, 1 Victoria Terrace, Egerton Street New Brighton Cheshire
Fancy Goods Dealer, do hereby declare the nature of this invention to be as
follows:-
A spring attached to Photographers printing frames for printing from negatives-
I place my spring at the back of the frame as is usual in these frames, but secured so
as to have no sliding action-The springs heretofore in use are usually secured to the
frames by a pin, rivet or screw, and move upon it as a centre in applying or removing
the pressure of the spring to the pressure board or back, the sliding action of the
spring, so worked, acting upon the pressure board or back causes it to move, thereby
causing a corresponding movement in the negative or sensitized paper, damaging or
destroying the copy.
My improvement is a bow spring hinged to the side of the frame at the back, so
that direct pressure only, is applied to the pressure board, when applying or removing
its pressure, all sliding action being avoided-and the securing of the spring when
pressed down, by an arrangement similar in action to an ordinary bolt for doors.
Dated this 19th day of November 1888
ALBERT TOWERS.
.
COMPLETE SPECIFICATION.
Improvements in Photographers' Printing Frames.
I ALBERT TOWERS No. 1 Victoria Terrace Egerton Street New Brighton in the
County of Chester Fancy goods dealer 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:—
This invention relates to a new spring or springs and the application thereof to
photographers printing frames, whereby the moveable backs are retained in position
without movement during the application of the said spring or springs.
Referring to the drawing
Fig. 1, represents a back elevation of an ordinary photographic printing frame,
with the improved hinged metal springs fixed in position pressed down and secured
by bolts as if in use printing.
Fig. 2, represents a section through ditto.
Fig. 3, represents a plan of ditto showing in addition by dotted lines the form of
the spring before it is pressed down, and by a single dotted line how the hinge permits
of the spring being thrown back as far as may be desired up to a line with the back
of the frame. Referring to the drawing in detail. (a) is the outer frame of a photo-
graphic printing frame. (b) is the glass front to ditto. (c) is the negative and
sensitized paper. (d) is the pressure board or back to ditto this back is always made
loose and free of the outer frame as shown at (d¹). (e) are the improved hinged metal
springs fixed to the outer frame by staples forming in connection with the metal of
the springs hinges (e¹) as shown or having in place thereof ordinary hinged joints in
which case the springs may be secured by screws in an ordinary manner.
The Springs are secured at the other end (e), after having been pressed down, by
bolts and staples as shown or turn buttons. The form or shape of the spring and
manner of opening when free is shown by the dotted lines in Fig. 3. The springs
are made of any suitable metal such as brass steel, or copper. I am well aware that
springs formed of metal have been used upon photographic printing frames, but they
work upon pivots or centres and have a sliding action upon the pressure board which
[Pic 1
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page_text: it is the object of this invention to avoid. I am also aware that springs have been
used for these frames formed as to part of wood and part of metal wood bars beings
in these cases hinged to the outer frames and applied as levers to press metal springs
upon the pressure beards, but all such are entirely different from these springs.
My invention consists of two springs each having hinge and bolt and staple or turn
button formed as shown of any suitable metal and fixed to the outer frame of a photo-
graphic printing frame as shown in Figs. 1. 2.3 Although two springs are generally
used to each frame one, two, or more may be used.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is―
1st. Two metal springs each having hinge at one end and bolt and staple or turn
button at the other as shown in Figs. 1. 2. 3 (e, e¹, e²) and described herein fixed to
the outer frame of a photographic printing frame for the purposes and in the manner
horein shown and described.
(2nd.) A metal spring having hinge at one end and bolt and staple or turn button
at the other as shown in Figs. 1. 2. 3 (e, e¹, e³) and described herein fixed to the
outer frame of a photographers printing frame in the manner herein shown and
described.
-
Dated this the 17th day of Ananst 1889
J. M. MURPHY,
Agent for Applicant.