Frame For Slates. Page: 3 of 3
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632,821
It will be noted that when it is desired to
remove the slate-frame a slender instrument
is inserted through the slot I of plate s and is
pressed upon the slide, which moves the slide
5 against the influence of the spring w and up
to a point directly below the cross extension
of the cross-shaped slot t, when the slide may
be lifted from its position and the wire n may
be withdrawn from the peripheral groove of
mo the slate-frame. The elements of the frame
may be then separated, the corner-casings
being removed, and the pieces of the broken
slate may be taken out and disposed of.
When it is desired to put in a new slate, the
15 frame-sections are put in place and the corner
casings inserted, after which the wire n is
passed around the frame, the knotted end is
placed against an end face of the recess o,
and after the spring w has been pressed to
20 one side the slide is reentered in the recess
and countersink and the covering put in place.
It will be noted that the corner rollers enable
the binding-wire to be drawn very tight to
hold the frame-sections firmly in their posi-
25 tions.
In order to provide a useful ruler attach-
ment, I form in one end frame-section and a
side frame-section a slot G and a slot H, re-
spectively, which slots meet at one corner of
30 the frame, a metallic plate I in the form of
a right angle being placed over the slots G
and H, similar meeting slots being formed in
the plate, as shown. Within the slot G and
adapted to pass therefrom into the slot H is a
35 button M, the shank of which passes through
the slot in the plate I. Secured to the outer
end of the shank of the button is a ruler N,
which lies parallel with the face of the slate
and may be pivotally moved upon the buttonat any angle, while the end of the ruler may 40
be moved at will, the button traversing the
slots in the frame, as will be readily under-
stood.
It will be appreciated that I may alter the
specific construction and arrangement herein 45
shown and described without departing from
the spirit of my invention and that in the con-
struction of my device I may employ such
materials as may be deemed proper.
Having thus described my invention, what 5o
I claim, and desire to secure by Letters Pat-
ent, is-
1. A slate-frame formed in sections, a pe-
ripheral groove about the frame, rollers at
the corners of the frame,a binding-wire passed 55
around the frame over the rollers and lying in
the groove, and a spring having connections
with one end of the wire and adapted to main-
tain tension of the latter.
2. A slate-frame formed in sections, a pe- 6o
ripheral groove about the frame, rollers at
the corners of the frame,a binding-wire passed
around the frame over the rollers and lying in
the groove, a recess in one frame-section, a
spring-pressed slide in the recess, and con- 65
nections between said slide and the wire to
maintain tension of the latter.
3. The combination with a slate-frame hav-
ing a groove therein of a button in the groove
and a ruler having connections with the but- 70
ton, whereby the ruler may be moved longi-
tudinally and pivotally.
In testimony whereof I affix my signature
in presence of two witnesses.
GEORGE W. MITCHELL.
Witnesses:
A. R. JENKINS,
P. H. HUTCHING.2
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Reference the current page of this Patent.
Mitchell, George W. Frame For Slates., patent, September 12, 1899; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth508688/m1/3/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.