Improvements in or connected with Optical Projection Apparatus.
Year: 1898

page_text: Date of Application, 22nd June, 1898
Complete Specification Left, 22nd Mar., 1899-Accepted, 22nd Apr., 1899
PROVISIONAL SPITIATIVA
Improvements in or connected with Optical Projection Apparatus.
A communication from abroad by THE NORTHERN ADVERTISING COMPANY [Nordisk
Reklame Kompagni (Aktieselskab)], of Copenhagen, in the Kingdom of
Denmark.
I, JAMES GRIEVE LORRAIN, M.I.E.E., M.I.Mech.E., of Norfolk House, Victoria
Embankment, London, W.C., in the County of Middlesex, Chartered Patent Agent,
do hereby declare the nature of this invention (as communicated to me from
abroad) to be as follows:-
In the Complete Specification filed with the Application No. 9374 of 1898,
hereinafter termed the prior specification, apparatus for optical projection is
described.
The present invention relates to a device suitable for use in connection with
the said apparatus when certain forms of carrier are employed.
As will be seen by reference to the said prior specification the advertisements
or pictures or the like pass underneath the lens box. In some cases, as for
example when the advertisements or pictures are affixed in frames hinged to a
travelling band, or other like form of carrier, it may be necessary to move the
lens box aside each time that the advertisement or picture is changed. The
present invention consists of apparatus by means of which the lens box can be
so moved aside when desired and afterwards restored to its normal position.
In carrying this invention into effect a drum or wheel driven by the motor is
provided with one or more studs or projections which as the wheel rotates come at
determined intervals in contact with a rod or lever which on being moved causes
a chain to be tightened or pulled and which upon further angular movement
comes in contact with another rod or lever causing another chain to be tightened
or pulled. The said chains are so attached to the lens box or to arms connected
therewith that whilst one chain pulls the said lens box out of its normal position
the other chain pulls it back into its normal position, that is to say back into the
position which it occupies when an image is being projected on the screen.
The action may be described as follows:-Let us assume that there is a single
projection on the drum or wheel mentioned above and that the said wheel makes
one revolution for each advertisement or picture placed in position. The parts
are arranged in such manner that just before a new picture is to be projected the
stud comes in contact with the rod or lever connected with one chain and moves
this so as to cause the chain to pull the lens box, which may be hinged or movably
attached in any desired manner, aside. The new advertisement or picture is now
brought into position and the wheel which bears the stud continuing to rotate
the said stud is now brought into contact with the other rod or lever so as to
tighten or pull the other chain which now restores the lens box to its normal
position. The wheel now continues to revolve and the image to be projected on
the screen until the next change of image is to take place. By this time the

page_text: wheel will have nearly completed its rotation and the stud will be again in position
to pull the lens box as before, the cycle of operations named being repeated.
Dated this 21st day of June 1898
J. G. LORRAIN,
Chartered Patent Agent,
Communicatee.
Improvements in or connected with Optical Projection Apparatus.
A communication from abroad by THE NORTHERN ADVERTISING COMPANY [Nordisk
Reklame Kompagni (Aktieselskab)], of Copenhagen, in the Kingdom of
Denmark.
I, JAMES GRIEVE LORRAIN, M.I.E.E., M.I.Mech.E., of Norfolk House, Victoria
Embankment, London, W.C., in the County of Middlesex, Chartered Patent Agent,
do hereby declare the nature of this invention (as communicated to me from
abroad) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement ;-
1
In the Complete Specification filed with the Application No. 9374 of 1898,
hereinafter termed the prior specification, apparatus for optical projection is
described.
The present invention relates to a device suitable for use in connection with
the said apparatus when certain forms of carrier are employed.
As will be seen by reference to the said prior specification the advertisements
or pictures or the like pass underneath the lens box. In some cases, as for
example when the advertisements or pictures are affixed in frames hinged to a
travelling band, or other like form of carrier, it may be necessary to move the
lens box aside each time that the advertisement or picture is changed. The
present invention consists of apparatus by means of which the lens box can be
so moved aside when desired and afterwards restored to its normal position.
In order that the invention may be more clearly understood a drawing is
appended hereto showing in what manner the invention is to be or may be carried
out in practice.
In the said drawing,
Figure I is a side elevation and
Figure II a plan.
Referring now to the said figures, 1 is a drum or wheel mounted on the shaft 2
which is driven by any convenient transmitting device from the motor. 3 is a
stud or projection on the periphery of wheel 1 and is shown as engaging with the
pin 4 which projects at right angles from lever 5 which lever is centred at 6.
Beside said lever 5 is another similar lever 7 centred at 8 and having an upwardly
projecting pin 9 corresponding with pin 4. The other ends of said levers,
that is the ends furthest from the pins 4, 9, are connected by cords, chains or the
like 10, 11, with the arms 12, 13 of the bracket 14 which supports the lens box.
The action of this part of my invention is as follows:-
The rotation of wheel 1 being so timed that it will make one revolution each
time the position of the lens box has to be changed and returned, it will be seen
that as soon as projection 3 comes in contact with pin 4, lever 5 is moved round
centre 6 and by means of the pull on cord 10 the lens box is moved out of its
normal position so as to allow the advertisement or picture to be placed in its
proper position. Further movement of wheel 1 now brings projection 3, as is

page_text: shown by its position in dotted lines, into engagement with pin 9 so as to cause
lever 7 to turn on centre S and cord 11 to pull the lens box back into its normal
position. Wheel 1 now continues to revolve and the image to be projected on
the screen until the next change of image is to take place. By this time wheel 1
will have completed its rotation and projection 3 will again be in position to pull
the lens box out of its normal position as before, the cycle of operations being
repeated.
Having now particularly described and ascertained the nature of this invention
(as communicated to me from abroad) and in what manner the same is to be
performed, I declare that what I claim is:-
1. In optical projection apparatus a movably attached lens box and means
driven by the motor for moving it out of its normal position and again restoring
it thereto.
2. The arrangement and combination of parts constituting means for moving
the lens box substantially as set forth.
3. The specific arrangement and combination of parts set forth with reference
to Figures I and II.
J. G. LORRAIN,
Communicatee.