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June 6, 1950
H. VAN DOORNE ETAL
2,510,439
SET SHIFT DEVICE
Filed March ‘7, 1947
2 Sheets-Sheet 1
INVENTOR5
>/-/. van Door/7e
By W- G: Sanders
I ZSM/M
June 6, 1950 ' ‘
H. VAN DOORNE ETA-L
2,510,439
SET SHIFT DEVICE
Filed March 7, 1947' "
2 ‘Sheets-Sheet 2
'
INVENTORS "
h’. v0.11 Door/1e
BY W G‘ SQ'INJICI’uS
Patented June 6, ‘1950
2 2,510,439
* UNITED. STATES PATENT OFFICE _
SET SHIFT DEVICE
, Hendrik van Doorne and William Gerard Sanders,
‘
Amsterdam, Netherlands
Application March 7, 1947, Serial No. ‘733,220
In the Netherlands February 13, 1946
‘5 Claims. (01. v33-410)
1
V
bodiment of the slide, and
' Fig. 4 ha view similar to Fig. 1 showing a mod-
over a predetermined distance which apparatus
comprises at least one foot supported on the sur-.
face of the drawing and vertically movable in re
spect of a slide carrying a fulcrum for an L-shaped
lever, one arm of which lever cooperates with the
foot and the other arm of which may be operated
against the action of a spring by means of an
operating member.
i?cation.
denotes a knob which may be attached e. g. to‘
a drawing triangle.
1,0
‘
is mounted to the slide so as to be vertically mov
'
An operating member 4 to which there is at
there is provided an intermediate plate In which
is adapted to be shifted in a slot H of the guide
plate I2. The two plates 9 and H] are ?xed to the
The invention improves this known type of‘
drawing apparatus by the ‘feature that the foot
lodged.
a stud with the forked end of a lever B which is
pivotally mounted at l on a block 8. This block
is located on a plate 9 of a slide. Under the plate
plicated, needing a large number of elements.
2.0. lower plate l3. Secured to the knob in any de-,
able in respect of the surface of the drawing, said
slide being displaceable in a direction parallel to
,
.
of the knob. This rod cooperates by means-of
Hence the whole construction ‘was very com
the surface of the drawing.
i
tached a rod 5 extends through a lateral recess 3
in respect of the plane of the drawing, while the
foot is mounted displaceably in a direction par
_
‘
In this knob there is provided a space 2' in.
which the device according to the invention .is
apparatus the slide is movable perpendicularly
7
.
In the said drawing the reference numeral 1
With a known embodiment of such a drawing
allel to said plane.
2
Fig.‘ 3 a longitudinal section of another em
The invention relates to an apparatus for mov
ing a ruler, triangle, curve or the like each time
'
sired way below the slide l2 and spaced therefrom
to form a guideway for the plate l3 are blocks
3] and 38. The plates I2 and 25 may be secured
byscrews or in any other way to the knob.
In this manner the construction is very much
~ The short lever arm also co-operates by means
simpli?ed so that only a small number of ele 25. of a stud and fork connection with the pin I4
ments has to be used.
'
which is attached to ribbed foot‘IB. This pin
Owing to the fact that the slide is movable in
passes through a sleeve [5 which. is ‘attached to
a direction parallel to the plane of the drawing
the slide.
'
,
the operating member for the apparatus can be
. The long arm of the lever is supported against
30
formed by a wall portion of the knob of the ap
a hinge ball I‘! of a rod 18 which is shiftable in
paratus.
'
a sleeve IS.
The principle according to the invention, also
The said sleeve and rod are sur
rounded by a press spring 20, which on oneside
permits of an embodiment constructed in such a
is held by a ring 2| and on the other side by a
way that the distance over which the slide is mov
screw
head 22 of the sleeve IS.
able may be adjusted by means of a rotatable ring 35
The screw head 22 may be screwed into and out
mounted parallel to the plane of movement ofthe
of a threaded sleeve 23, whereby the tension of
slide, the inner rim of which ring curves helically
the spring 20 may be controlled.
inwards in a certain sector of the ring.
In the same plane as that of the plate 9 there
The slide may consist of a guide block for a
is provided a ring 24 (see also Fig. 2) which is
40
pin of the foot, which block is provided with
guided by a ring 25 a fourth part of which has
?anges, which below the edges of a groove engage
been removed.
with a horizontal guide plate, a locking washer
The ring 24 is rotatable by means of a handle
being provided above the edges of the groove,
26 which also serves as a pointer for indicating
which washer is kept in place by means of safety
width of the distance between the hatching
springs resting against the guide block, said slide 45 the
on a scale not represented in the drawing.
preferably comprising a pointed portion, which
The plate 9 has a pointed end 21 which co
cooperates with the inwardly curving part of the
operates with a helically shaped portion, or a
adjusting ring.
portion that is gradually curved inward in some
The invention will now be further explained
other manner, 28 of the ring 24.
50
with the aid of the accompanying drawing in
By turning the ring 24, the point 21 and, along
which:
i
with the same, the slide 9, ill will be hampered
in its return movement.
The device operates as follows:
Fig. 1 is a vertical section through a knob
containing a device according to the invention,
Fig. 2 is a plan view of the ring for adjusting
the distance between the hatching lines,
65
The draftsman holds the knob in his left hand,
2,510,439
and with his left thumb presses the operating
Fig. 4 oi’ the drawing represents an embodi
member 4 inwardly in the direction of the arrow
ment provided with a tension spring 34, which
:1. This will cause the lever 6 to turn to the left
embodiment is very simple and reliable and re
whereby the stud I4 is pressed down. The ribbed
only a very small number of members.
foot will then be pressed into the paper 29. At 5 quires
We claim:
this moment the rotating motion of lever 1 will
1. An apparatus for moving a ruler, triangle,
be stopped and thersaid lever will tend to move
curve or the like a predetermined distance com
to the lélit
'"regard'to the knob ‘I iamderetli'e
prising ea slide,‘ a-pfoot supported toniltheisurface
influencerofr’the pressure exerted on’the mem='
of‘*a'*drawirig'vertically'movabl’e with respect to
her 4.
lohsaid
slide and mounted on said slide to be ver
As this is impossible, because the foot I6 is";
ti‘cally movable with respect to the surface of
?rmly pressed into the surface of the paperyqther
said-:drawing, an L-shaped lever fulcrumed on
knob I as well as the ruler or triangle 30 attached
said
slide,vone arm of said lever cooperating with
to the same will be shiftedlttdethieerig‘ljt?until“
said"fdotseacspring'ibiasing the other arm of said
the plate ID has reached the left handiendr‘ofr"*15 ' le‘verfanwperating member for operating said
the slot II.
othel'aarmragainstgsaid spring and said slide being
If the draftsman releases the operatingainennw
displabeablaima
direction parallel to the surface
her 4, the lever ‘I will be returned to its original
of“ saidldrawing.
position by the spring and will then carry-*aldngw
2i"Aii'apparatus as setforth in claim 1 wherein
the foot l6. As soon asethe return movement of ‘
said operating member is formed as a side of said
thezlfoctwhassb'eemstopped?theeslifdei is alsofzre- 0 apparatus?
7
turned to its initial ipositim'ir'byi:.:meanss.:ofritlrre1
35*Ahapparat1islasset'fortlrin-fclaimil
iwhereini
springs: During: this'movementr the-{point 2131‘3of
a';-ririg~-'-rotata‘bl3i¢ mounted parallelf-"tdrthe :plaine
the plate 9 will contact with the segment?mii
of~=movement§bf Y’» said slide ‘having 1a helical_ inner:
wherebgmtheiiwidthi?of ?th’e distance .:between :the
25 periphery ‘cooperableewithi'tsaidi slider adjusts the;
hatchingzlmesiwill :be determined. H
'
displacement ‘-’‘of- -'said"é*slide.e
By the movements described abbvesthesdrawingn
4'1‘ An'eappar-atusas-set=»fertl'iinsclaiml1 'whereinl
instruments inborn‘-onmvhiol?ihé lk‘nob provided
a-"pin" ‘isiprovidede on ‘said <fo*ot--'andisaid" slidecon-L
with‘ihtl'i'earidevicei aecordingwtd thew-inventionuisi
sis'tsspflfaeguidiel bk'ck'éfdr rsaid-l-pin‘, saidh'blo‘oki’
attached, are successively lifted a small distan'cea
?anges which below the-edg‘es'of ialgroove
o??the vsurfaceeofvlth‘ei drawingvandwsubsequently 0 having
engage" withia- l~=horizcntalrfguidej plate; a'*loc'king
m‘evedf'overr'rthes predetermined l-Jdistalnce‘: ins-the;
washewbeingf’providedi-iaboveethe I'edgeseof- the‘
directionip?thejarrowidw and then- lowered again?
groovege-whichi washer “is skeptl in ‘place: by=>meansL
ontci-th‘e: surface of i‘thezdraw-ing; aftérrwhichithei
offsaietyesprings- restingeaga‘inst the ‘guide blo'ekie
hatchinghlineisldrawn: I 'I'liesaidmrovements'are: 35
‘Withithevembodirnentihccordirigeto-sFi'g; ,3"the1
slide'econsists
which? areelocated
iobithe
one
:two
onreach'lsi'delpr
iouteraplate's the guide?
Finite A
5. An apparatus as set forth in‘‘claim-Y31wherein‘‘S
the‘*slideipomprises‘a-"poirrt'ed poi-um;- which‘ico
operatésewitlfeth'e-‘hélical 1;: eripher-yI were adj ilstii
i
irrg ring.
'
lmNBRIKivmeDoORNE-?
_ ath‘elsaidi‘gui'dev-plate ‘which blockiis provided“
with-ea recessz?iifo‘r the pin o?’the-"fd'ot; ’
- 'I’HeYpI-ateseS ‘1 and-r513 i’aree pressede'agaiinstethe
plate I 2'ibyameanssppisprings=33Tlineorder ‘to-1pm“
ventianyepossiblei~play,vsoethat theemovementiof 15:5
' ' W
SANBERS?
' REFERENGESiCI-TEEL.
The followinggreferences are'of recordfin" the‘
?l‘e‘i‘of thispaténtr
"
'
UNITED STATES ‘PAfI-ENTSH
Number“!
V
. Name v
'
V _
Dates»
205%;904111. stanm.;__;.___-_c-____g_r ‘Sept-3191936?
lIfistl‘ieuplates-r-d ‘and-‘=13 v’th'ere islprovidedkan 50;:
opening-rormingra- \passage “fora-the ble‘cke;
Number
' ~Tliisf= 4embcdiirirent "i' is'»‘~“~verywsuitablel» foi’vtmassl
prcdu‘ctio *3’
‘
‘
semen-Mme;
Country
Dateis
l 652,~244§n~ VGenmawtygw?m?um.Octn27p1937
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