close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2412246

код для вставки
Dec. __10, 1946.
MLEQBLUMENSTEIN
' ‘2,412,246
PROJECTION PICTUR'E FEEDING MECHANISM _
‘
Filed, July 28 , 1945
.
.5.
WW.
.,
wum'm.
3A‘ MaxEBllunensib ire,
‘
36
14!’
I
15
lr 1:4
26
.
1
Patented Dec. 10, 1946
unrrso STATES I PATENT OFFICE
2,412,246
PROJECTION PICTURE FEEDING
HANISM
MEC
, '
Max E. Blumenstein, Hyattsville, Md.
Application July 28, 1945, Serial No. 607,551
3 Claims. (Cl. 88--28)
1
This invention relates to an improved mecha
nism for feeding picture slides to a viewing po
sition.
The general object of the invention is to pro
vide a simple, practical, inexpensive and reliable
step-by-step, ?nger-operable mechanism which
is e?ective, by each step of operation thereof,
to shift one projection picture slide from a view
ing position and, simultaneously, to take from
a magazine and shift to said viewing position
another slide to be viewed.
A special and important object of the inven
tion is to provide a mechanism for the purpose
stated embodying stop means to limit each step
of operation thereof and to insure that upon
completion of any given step of operation there
of a picture slide taken from the magazine and
shifted to the viewing position by that step of
operation will be disposed accurately in the view
2
Figure 2 is a central, vertical section through
the mechanism; and
Figure 3 is a horizontal section on the line 3-3
of Figure 1.
'
Referring to the drawing in detail, A designates
Ya portion of the casing of a projection picture
slide viewing apparatus and I0 designates a ver
tically disposed wall or panel mounted in any
suitable manner within said casing behind the
frontv wall ll thereof.
Also mounted in any suitable manner within
the casing A are upper and lower rollers l2 and
I3 over which is trained an endless belt [4 hav
ing outer and inner reaches Ma and [4b, respec
15 tively, the former of which is suitably constrained
to travel against or adjacent to the front face
of the wall or panel l0 and the latter of which is ‘
suitably constrained, as by means of other suit
ably mounted upper and lower rollers l5 and [6,
20 respectively, to travel against or adjacent to the
ing position.
rear face of said wall or panel Hi.
According to theinvention there is provided
In the belt [4 are a number of apertures l1
at the viewing position an aperture with which
which are of equal sizes and equally spaced apart
the successive picture slides are brought into
longitudinally therealong. As said belt is ad
alinement by successive steps of operation of the
mechanism and through which said slides are 25 vanced apertures of the respective reaches there
of obviously will become alined, and at a location
illuminated for viewing purposes, and in this
where two of said apertures become alined the
- connection another special and important object
wall or panel I0 is provided with a single aper
of the invention is so to construct the mecha
ture IS. in the present instance this aperture
nism that it acts to close said aperture as one
picture slide is being removed from the viewing 30 I8 is located approximately midway between the
rollers l2 and I3 at what may be termed a view
position and another is being shifted from the
ing position for the projection picture slides to
magazine to said viewing position.
be viewed.
a
.
Another special object of the invention is to
The function of the belt M is to feed picture
provide a mechanism for the purpose stated em
bodying an endless belt as a slide shifting ele 35 slides successively to the viewing position and,
of course, to remove viewed slides from that po
ment, whereby the mechanism always is operable
in the same manner and in the same direction
to effect shifting of the slides regardless of their
number.
With the foregoing and other objects in view,
which will become more fully apparent as the
nature of the invention is better understood, the
same consists in a mechanism for the purpose
sition. To this end, means is provided for deliv
ering to said ‘belt picture slides to be advanced
thereby to the viewing position, and other means
is provided for advancing said belt in steps each,
equal to the spacing of the apertures therein to
feed the slides successivelyto the viewing posi
tion.
.
’
.'
,
The picture slides are designated as [9 and
stated embodying the novel features of construc
tion, combination, and arrangement of parts as 45 are of the'well-known type comprising a rectan~
gular frame 20 carrying a picture ?lm 2|. They
will be hereinafter more fully described, illus
are of equal sizes and may be fed to the belt [4
trated in the accompanying drawing and de?ned
either by hand or from a magazine or any other
in the appended claims. '
V
suitable feeding means. In the present instance
In the accompanying drawing, wherein like
characters of reference denote corresponding 50. a magazine 22 is illustrated as a containing and
'feeding means for them.’ This magazine is lo
parts in the different views:
cated at a suitable elevation above'the viewing
position in front of the front reach Ma of the
belt I4 and may be inclined downwardly toward
bodiment of the invention, the front wall of the
casing containing said mechanism being removed. 5.5,. said front reach sothat the slides 19, which are
Figure 1 is a front elevation of a mechanism
constructed in accordance with one practical em
:_ .
2,412,246
3
4
stacked vertically therein, will gravitate toward
being equal to the amount of upward movement
said front reach. Alternatively, the magazine
may be disposed horizontally and spring means‘
may be provided to urge the slides toward the
front reach Ma.
required of the member 25 to permit the pawl
29, during upward movement of the member 25,
to snap above the said projection 32. From its
uppermost position the permissible amount of
downward movement of the member 25 is equal
to the spacing of the pawl 29 above the afore
Advance of the belt I4 is in a direction such
that its front reach Md travels downwardly and
its rear reach Mb upwardly. Onvv said belt,>jbe-'v
said projection 32 plus the spacing of the belt
apertures l1. It will thusjbe' apparent that with
low eachaperture l'l therein as regards its di
rection of advance, is a picture slide support 23.
the belt H3 in a position with a pair ofits aper-v
tures H alined at the viewing position and with
the member 25 in its uppermost position, down
ward. movement of said member 25 to its lower
These supports may be of any suitable form and.
are illustrated in the present instance as come.
prising small ledge-forming'pieces suitably fas-r I
tened to said belt and projecting outwardly" '
therefrom. They are adapted to have the. slides? 15
i9 rest at their lower edges thereon to support.
the slides parallel or substantially parallel to
the front reach Ma at the front thereof, and, '
they are spaced‘ below the apertures l’! to sup
most position will result in contact of the free
end of the pawl 29 with the projection 32 di
rectly therebelow and advance of the belt one
step equal to the spacing of the apertures ll,
with the result that a picture slide supported by
' the belt above the viewing position will be moved.
port the, slides with their picture’ ?lms 2! in 20 downwardly to, the viewing position. At the
alinement with said apertures.
.
same time, a slide in !the', viewing, position will
be moved downwardly from that position to be
The inner, open end of the magazine 22 is dis
posed adjacent to the front reach Ma. of the
discharged either by. said step of advance o'f'the
belt I4 so that as said’ belt is advanced and each
belt or by‘a subsequent step of advance thereof,
support. 23 moves to a position below said maga 25 depending upon how far the front reach ofthe
zine,.a slide, I9’ is deposited thereon to be carried
to the viewing position.' As the belt is advanced
and, its lower portion recedes rearwardly about
the lower roller [3, the supports 23 are shifted
from beneath the slides and, the latterrgravitate' 30
from the' mechanism to be collected for repeated
viewing whenever desired. In this connection,
a suitable receptacle 24 preferably is provided
to receive the slides as they gravitate from the
mechanism.
belt extends. below the viewingjposition.
An arm 33' may extend from the member 25 I
through a slot 34 in the front‘ Wall ll of the cas
ing A and may be equipped. at its outer end. with
a ?nger piece 35 to be pressedv downwardly to
slide the member 25 downwardly,’ and- suitable
resilient means, such as a coil‘ spring 35, may
be provided‘ for returning said‘ member 25 to. its
uppermost position when ?nger pressure is re-'
35 moved from said ?nger piece 35.. As the member
'
The means for effecting step by step advance
of the. belt [4 comprises a member 25 suitably
mounted adjacent to one'side of the front reach ‘
14a of the belt III for vertical sliding movement.
25 moves upwardly,‘ the pawl 29‘ obviously will
snap above the next-projection 32 for engage;
ment therewith to advance the, belt another step
by the neXt downward movement of the member
This member may be mounted for slidingmove 40 25. It will thus be apparent that as a result
' ment between a' pair of guide rails 25 carried by
of successive steps of advance of the belt. M, pic
the wall or panel‘ l9 and its vertical movement
ture slides will be fed successively from the mag
is limited by suitable stop means which, in the
azine 22 to the supports. 23' and will, be. moved by
present instance, .are illustrated as comprising
the belt accurately to the viewing. position, while
upper and lower stop lugs 21‘ and 28, respecs 45 viewed slides will simultaneously be discharged
tively,'which, may be carried by the wall or panel
successively from the mechanism.
[0' and‘ with which the upper and lower edges of
‘Behind the viewing position is an.electriclarnp '
said member are respectively‘ engageable. ‘
37 or any other suitable means forilluminating
iPivoted ‘at one end‘ to the member 25 is a
, the'?lms' 2|: ‘of the picture slides 19 whensaid
pawl 29 which is, free to swing downwardly and 60 ?lms are in the viewing‘ position, while in‘. front. '
which is ‘constantly urged upwardly‘ by a ‘light’
of the Viewing‘ position is a suitable lens'oii lens '
spring 39 against a stop 3| carried by saidmem- ‘
system through which the ?lms are to be, viewed
ber 25 and by. which its upward swinging move
and which is, of course, effective to magnify the
ment’ is limited; 'The free end of said pawl'nor
pictures. The front wall H vofjthecasing A‘has,
’ mal‘ly overlies the adjacent marginal portion of ' 55‘ therein, of course, an opening‘ through which the
the front reach Ma of the belt M in advance of 1
slides may be viewed.
said front reach‘by an amount at least equal to
Suitable stripsv 3-8 7 preferably areicarried; by.’
the thickness "of ‘the slides IQ for cooperation 1
the wall or panel H? for cooperation with said
‘ with ‘projections 32 which are carried by said
I wall or panel, to form a track way for the'jfront
: belt and whichextend‘ outwardly therefrom be
reach Illa~ of‘ the belt it and to ‘hold. said'reach
80
yond the‘ outer or front faces of the slides I9 tol
in a planar condition as well as" to hol'd'the slides
be engaged by said pawl.‘
The projections 32 may be separate from
I9 against lateral‘ movement‘ relative to' said
supports 23 or they may be in vthe form of lugs ‘
reach. v However; any other jmeans may be» pro~
vided for these purposes.
‘
" f -
.
I
'7
formed as integral parts of said supports ‘as 65
As the belt is advanced‘ it‘ isappareh'tl that the
shown.) In'any event, the relationship of said
portions of' the same ,between'fthe, apertures ~Iffi
‘ projections ,to the apertures l1‘ and the supports
therein will act as curtainsto out off, light from
2'3,‘and the relationship of the member 25 to'thew . V
beltld. and of the. pawl 29 to said member, all
. are'such that’ when said- member25 is in its up-'
permost. position, as shown in Figure ,1, and a
pair of the-belt apertures l‘! are alined with 'each
other and with the aperture t8, the. .free end ofv
‘ thepawl 2,9 is. disposed a predetermined. distance 'v
above one of the projections 32, this distance
the. lamp 31 at the VieWingQposition durin-glre
. moval of one slide-from said position and feeding
70
of another slideto said position; =
From the foregoingidescription.considered in"
connection with the-accompanying- ifh'awingit
is believed that the‘construction and operation
of the. present mechanism. willbe'clearl-y under‘.
stood and ‘its advantagesappreciated. It is de
2,412,246
5
sired to point out, however, that while only a
single speci?c structural embodiment of the in
vention has been illustrated and described, the
same is readily capable of other speci?cally dif
ferent structural embodiments within its spirit
and scope as de?ned in the appended claims.
I claim:
6
ing movement adjacent to said belt, stop means
limiting the sliding movement of said member,
resilient means tending constantly to slide said
‘member to its uppermost limit, projections on
- said belt having the same spacing as the aper
tures therein, a pawl carried by said member for
cooperation with said projections so that each
time said member is ‘slid from its uppermost to
its lowermost limit the belt is advanced one step
1. A mechanism for feeding projection picture
slides to a viewing position, said mechanism
comprising a vertically disposed wall having 10 equal to the spacing of said belt apertures, said
belt apertures being disposed so that for each
therein an aperture de?ning the viewing posiw
step of advance of said belt a new aperture of
tion, a vertically disposed endless belt including
each belt reach is brought into alinement with
outer and inner reaches and having therein a
plurality of apertures equally spaced apart lon
the aperture in said wall, picture slide supports
carried by said belt, said supports being indi
gitudinally thereof, rollers over which said belt
vidual to said belt apertures and each being lo
travels and which are disposed to cause the outer
cated to support a slide in alinement with its
and the inner reaches thereof to travel over the
related aperture, and a picture slide magazine
outer and the inner faces of said wall, respec
disposed to have picture slides delivered succes
tively, a member mounted for vertical sliding
movement, stop means limiting the sliding move 20 sively therefrom onto successive supports of said
belt ‘as said supports reach positions in advance
ment of said member, resilient means tending
of the viewing position.
constantly to slide said member to its upper
3. A mechanism for feeding picture slides to
most limit, projections on said belt having the
a viewing position, said mechanism comprising
same spacing as the apertures therein, a pawl v
an endless belt including outer and inner reaches
carried by said member for cooperation with said
and having therein a plurality of apertures equal
projections so that each time said member is slid
ly spaced apart longitudinally thereof, a member
from its uppermost to its lowermost limit the
mounted for sliding movement longitudinally
with respect to said belt between retracted and
disposed so that for each step of advance of said 30 projected positions, stop means limiting sliding
belt is advanced one step equal to the spacing
of said belt apertures, said belt apertures being
belt a new aperture of each belt reach is brought
into alinement with the aperture in said wall,
movement of said member, resilient means tend
alinement with its related aperture, and means
for depositing onto each support as it reaches a
position in advance of the viewing position a
picture slide to be carried by said belt to the
tracted position to its projected position said belt
ing constantly to retract said member, projec
picture slide supports carried by said belt, said
tions on said belt having the same spacing as
supports being individual to said belt apertures
the apertures therein, a pawl carried by said
and each being located to support a slide in 35 member for cooperation with said projections so
viewing position.
2. A mechanism for feeding projection picture
slides to a viewing position, said mechanism
that each time said member is slid from its re
is advanced one step equal to the spacing of said
apertures, said apertures being disposed so that
40 for each step of advance of said belt a new aper
ture of each belt reach is brought to the viewing
position, picture slide supports carried by said
comprising a vertically disposed wall having
belt, said supports being individual to said belt
therein an aperture de?ning the Viewing posi
apertures and each being located to support a
tion, a vertically disposed endless belt, including 45 slide in alinement with its related aperture, and
outer and inner reaches and having therein a
means for depositing onto each support as it
plurality of apertures equally spaced apart lon
reaches a position in advance of the viewing
gitudinally thereof, rollers over which said belt
position a picture slide to be carried by said
travels, means to cause the outer and the inner
belt
to the viewing position.
reaches of said belt to travel over and adjacent 50
to the outer and the inner faces of said wall,
respectively, a member mounted for vertical slid
MAX E. BLUMENSTEIN.
Документ
Категория
Без категории
Просмотров
0
Размер файла
549 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа