IMPROVEMENTS IN APPARATUS FOR TEACHING IN SCHOOLS
Year: 1875

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, Doctor of Laws, for the
Invention of "IMPROVEMENTS IN APPARATUS FOR TEACHING IN SCHOOLS."
-A communication from abroad by Malcolm McVicar, of Potsdam,
New York, United States of America, and Donald Harvey M*Vicar,
of Montreal, Canada.
COMPLETE SPECIFICATION filed by the said George Haseltine at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 2nd January 1875, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," Southampton Build-
ings, London, Doctor of Laws, send greeting.

page_text: grant unto me, my executors, administrators, and assigns, Her Royal
Letters Patent for the same, and have made solemn Declaration that
it has been communicated to me from abroad by Malcolm McVicar,
of Potsdam, New York, United States of America, and Donald Harvey
M'Vicar, of Montreal, Canada.
NOW KNOW YE, that I, the said George Haseltine, do hereby
declare that the following Complete Specification, under my hand
and seal, fully describes and ascertains the nature of the said Inven-
tion, and in what manner the same is to be performed, in and by the
following statement, reference being had to the accompanying Drawing
forming a part of this Specification :-
The nature of this Invention relates to improvement in apparatus for
teaching in schools, and it consists in a frame having a suitable opening
through its centre for exposing cards or objects to view, upon each side
of which are arranged a set of independent slide bars which can be so
arranged that either set will entirely or partially hide the object or card
from view. Sliding in grooves, back of this opening and two sets of
slide bars, is a card frame made of slats, with spaces between them to
receive objects, and with grooves at the top and bottom to receive cards
and a concave plate of tin or other metal, and a spring at cach end to
hold the cards in position used for moving cards or objects before the
opening so as to expose any part of them at a time. An object frame
also composed of slats, with spaces between them forming grooves in
which to insert objects prepared with tongues to fit into these grooves is
used either independently or is attached to the main frame by hinges or
otherwise, all as herein-after more fully set forth.
In order to enable others skilled in the art to which the Invention
appertains to make and use the same I will now procced to describe its
construction and operation, referring to the annexed Drawing which
forms a part of this Specification, and in which,―
Figure 1 is a front elevation of this Invention, the two sets of
slide bars being arranged so as to cover and expose various parts of the
card.
Figure 2 is a similar view, the two sets of independent slide bars
being moved back and the card frame B being provided with various
designs for obiect teaching.

page_text: Figure 3 is a vertical section on the line x, x, Figure 1, when the
object frame C is hanging in front of frame A.
Figure 4 is a cross section of the end of the card frame B, showing the
concave plate and concave spring used to hold the card in position.
A represents the frame made of any desired shape or size, and having
a suitable opening made through its front for exposing cards or objects
to view. Upon each side of this opening is arranged a set of independent
slide bars which consist of narrow slats a, and which can be moved back
and forth over the opening, so that either set alone or both combined
may be used for hiding from or exposing to view any desired portion of
the card presented, as shown in Figure 1. Sliding in grooves in the
upper and lower parts of the frame A, back of the slide bars a, is a card
frame B composed of narrow slats which have spaces between them
forming grooves for the insertion of various designs used in object
teaching. This frame is provided with grooves at the top and bottom
for the reception of the cards or other printed matter being exposed to
view, also with a concave plate b¹ of tin or other metal attached to its
end turning on pivots so as to seize the end of the card and hold it in
position. The concave plate 6' is held in position by a concave spring d,
the spring and plate turning upon different axis, the axis of the plate
being within the semi-cylinder formed by the spring, as shown in
Figure 4. By means of the handle the card frame B can be moved
back and forth so as to bring any portion of the card before the opening.
Attached by hinges or otherwise to the top of the frame A is a frame C
composed of narrow slats forming grooves adapted to receive various
devices and designs for object teaching, and which, when used in
connection with the frame A, is placed over it, as shown in Figure 1,
but when used alone may be placed in front of the frame A, as shown
in Figure 3, in both cases exposing the objects to the view of the class.
The frame A and the object frame O may each be used independent of
the other if so desired.
Having thus fully described the said Invention as communicated to

page_text: 2nd. The card frame B adapted for presenting either cards or objects
before the opening in the frame A, substantially as and for the purposes
herein set forth.
3rd. The object frame C used either alone or with the frame A,
substantially as set forth.
4th. The frame A, with the card frame B used either alone or with
the object frame C, substantially as set forth.
5th. The concave plate and spring for holding the ends of the cards
in the card frame B moving upon different axis and arranged sub-
stantially as described.
6th. The frame A, independent slides a, card frame B, and object
frame C, when said parts are combined and arranged to operate, sub-
stantially as shown and described.
5
]
In witness whereof, I, the said George Haseltine, have hereunto
set my hand and scal, this Second day of January in the year of 1
our Lord One thousand cight hundred and seventy-five.
Witness,
H. J. NOONE.
GEORGE HASELTINE. (L.s)