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Патент USA US2404911

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July 30, 1946.
E. l. KING ß
2,404,91 l
MEcHANIo’s SQUARE
Filed Jan. 11, 1945
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Illl
INVENTOR
_Elm er l. _King
Patented July 30, 1946
Z ,404,91 1
UNITED STATES PATENT OFFICE2,404,911
MECHANIC’S SQUARE
Elmer I. King, Jeannette, Pa.
Application January 11, 1945, Serial No. 572,293
’7 Claims.
(Cl. 33-103)
'I'his invention relates to tools of the type used
by artisans and mechanics and generally known
as a universal square.
The conventional universal square comprises
a metal straight edge or rule with a groove along
one face thereof. There is a slide movable along
the rule with right angle and 45° angle faces
thereon. This slide is adjustably locked in place
in any position to which it may be adjusted along
the rule by turning a nut which puts tension on
a locking pin, the locking pin having a lug or
nib which rides in the groove of the straight
2
,
the two arms 5 and 1 is a boss or projection II
with a central bore therethrough. the outer O_I‘
upper end of this bore being internally threaded.
The base 4 is slotted longitudinally on a midplane to receive and straddle the rule or straight,
edge 2. The base »l is also formed with a borse
or counter-sunk opening I2 which forms an en
larged continuation or extension of the hole in
the boss II, and this counter-bore is internally
threaded.
Y
_
Screwed into the counter-bore I I is a threaded
plug i3 that is bifurcated from its ñared lower
edge. When the lug is thus put under tension,
end inwardly toward the other end, the slot I4
it binds in the groove, holding the slide from
therein being of a width to receive and snugly
moving. Sometimes it is desirable to remove the 15 straddle the rule 21 and when the plug I3 is
slide entirely from the rule, and if this hap
screwed in to its fullest limit this slot I4 is in
pens, the locking pin may rotate, moving the
register with the slit along the base, and its
lug to a position where it interferes with putting
flared lower end is flush with the bottom of
the slide back on the rule.
’
According to the present invention, a locking 20
base 4.
'
A pin I5 is slidably received in the plug I_3
and extends up through the boss II. The lower
device is provided which is much more simple
and convenient to operate, simple to manufac
end of the pin I5 has a thin extension I6 thereon
ture, and the lug on the locking pin may not,
with an overhanging lug I'I at its terminal, the
under normal conditions, obstruct the applica
lug being entered in groove 3 of the rule and the
tion of the slide to the rule, enabling the slide 25 thin extension I5 iitting against one face of the
to be removed and applied with no difficulty.
rule.
.
My invention may be more fully understood
Surrounding the pin I5 inside the boss Il .is
by reference to the accompanying drawing in
a relatively stiff coil spring i8, the lower end of
which:
this spring resting on the end of the plug I3,
Figure 1 is a side elevation of a tool embody 30 which provides an abutment for the spring. . "
ing my invention, parts being broken away to
At the top of the post or extension lI is a
better illustrate it; '
Figure 2 is a transverse section in the plane
head or cap element I9 having a downwardly
extending tubular extension 20 that is screwed
of line II-II of Figure 1;
into the top of the post. The top portion rof
Figure 3 is an exploded view of the several 35 the cap is bifurcated, providing two ears 2l and
parts comprising the novel locking mechanism;
the top of the pin I 5 projects through the cap
Figure 4 is a fragmentary view, similar to Fig
and terminates in the space between these two
ure 1 showing a slight modification; and
ears. A transverse pin 22 passing through pin
Figure 5 is a fragmentary sectional view of
2| forms an abutment for the upper end of spring
the upper part of the locking pin assembly, show 40 I8, so that the spring I8 tends to force the pin
ing still another modiñcation.
upwardly as viewed in Figures 1 and 2. while
Referring first to Figures 1 to 3 inclusive, 2
the inner end of the tubulation
on the cap
designates the usual metal rule or straight-edge
limits- such outward movement, and the tubula
employed in devices of this kind and 3 is a nar
tion may have a transverse groove or notch 20a,
row groove extending along the middle of one 45 at its lower end into which this pin may be pro
edge thereof.
'
jected to hold the main pin I5 from rotation.
The slide may be made as an integral cast
Received between the ears, and retained in
ing with a base portion. 4,
perpendicular arm
place by a pivot pin 24 is an operating member
5 having a machined face 6 at right angles to
23 having a flat surface isa bearing against the
the straight~edgel It also has an arm 1 with 50 top of pin I5, an operating extension 23h. and
a machined face‘B at a 45° angle to the straight
a lug 23e that limits the arcuate movement of
edge. A brace or frame 9 connects the outer
the lever in a clockwise direction (as viewed in
ends of the two arms and there is a bubble-level
Figure 1) by contacting the cap in the space
at I9 on the arm 5.
between the ears 2|.
Formed on the base 4 and extending between 55
With the assembly as herein described, the
2,404,911
3
spring I8 exerts a relatively strong pressure
through abutment 22 to urge pin I5 upwardly
or outwardly, causing the lug I1 to bind against
the upper edge vor the groove 3 in the rule 2,
ñrmly locking the slide against free sliding move
ment. However, if pressure is applied to lever
22h, tending to rotate it in a counter-clockwise
direction (as viewed in Figure 1) thereby de
pressing pin I5 and releasing the lug Il from
binding engagement with the edge of the groove,
permitting the slide to move freely along the
rule 2. Upon release of the pressure on lever
23h, spring I8 acts to push the pin I5 up and
again lock the slide.
against the walls of the groove to hold the slide
member movable transversely of the longitudinal
axis of the rule, a spring in the slide surrounding
the pin for yieldably urging it to a position
where said lug is in locking engagement with the
groove, the tension of said spring exerting the
sole locking force against said rule, and an oper
ating lever at the outer end of the pin for mov
ing the pin against the pressure of the spring
to release the lug from locking engagement with
the groove.
3. In a tool having a slide member into which
a rule is set edgewise with the slide straddling
the rule, the rule having a groove along one face
thereof, the invention comprising means for ad«
If the slide is removed from the rule, cross pin
justably holding the slide and rule against rela
22 is forced up into notch 25a to hold pin I5
tive movement comprising a pin carried by the
from turning so that when the slide is next put
slide member movable transversely of the longi
back on the rule, the lug will be in proper po
tudinal axis of the rule, the pin having an exter
sition.
The plug I3 is used to facilitate the assembly 20 sion on its inner end with a lug that is received
in the groove and which is adapted to bind
of the parts as without such a plug, machining
against the walls of the groove to hold the slide
and assembly would be more difficult.
against movement, a spring in the slide sur
After long usage some slight wear may take
rounding the pin for yieldably urging it to a
place between the outer end of the pin and the
position where said lug is in locking engagement
surface 23a of the operating member. rThis can
with the groove, the tension of said spring exert
be compensated for by either of the two ar
ing the sole locking force against said rule, and
rangements indicated in Figure 4 or 5.
an operating lever at the outer end of the pin
In Figure 4, all of the parts are identiñed by
for moving the pin against the pressure of the
reference numerals as used in Figures 1 to 3,
spring to release the lug from locking engage
but ln addition there is shown a set screw 25 in
the operating member which has an innner ter
minal portion projecting through surface 23d
to engage the pin, and if Wear develops this pin
may be turned down. In this ñgure operating
extension 23h is provided with a button 23d
against- which the thumb or ñnger may be
pressed.
ment with the groove, the operating lever being
pivotally carried by the slide and having an oper
ating extension thereon.
4. In a tool having a slide member into which
a rule is set edgewise with the slide straddling
the rule, the rule having a groove along one face
thereof, the invention comprising means for
adjustably holding the slide and rule against
relative movement comprising a pin carried by
with a set screw |59: the head of which bears
the slide member movable transversely oi the
40
against the operating member, and if wear de
longitudinal axis of the rule, the pin having an
velops, operating member 23 is removed, screw
extension on its inner end with a lug that is re
I 5a: adjusted, and the operating member then
ceived in the groove and which is adapted to
replaced.
bind against the walls or" the groove to hold the
While I have shown my invention as applied
In Figure 5 the top of the pin I5 is provided
to one speciñc form of slide having a right angle .' slide against movement, a spring in the slide
surrounding the pin for yieldably urging it to a
arm and a forty-live degree arm, implements of
position where said lug is in locking engagement
this kind use various other slides with different
with the groove, the tension of said spring exert
arm arrangements, and my invention is applica
ing the sole locking force against said rule, and
ble to all of these.
oi) an operating lever at the outer end of the pin
I claim:
for moving the pin against the pressure of the
l. In a tool having a rule which is longitudi
spring to release the lug from locking engage
nally grooved and a slide having a face at an
ment with the groove, and adjustable means for
angle to the rule characterized by the provision
compensating for wear between. the lever and the
of a locking means on the slide cooperating with
pin.
the groove in the rule wherein the locking means
5. In a tool having a slide member into which
comprises a pin in the slide movable transversely
a rule is set edgewise with the slide straddling
of the longitudinal axis of the rule, the pin hav
the rule, the rule having a groove along one face
ing a terminal portion at one end to engage in
thereof, the invention comprising means for ad
the groove, a spring exerting pressure on the pin
L.. justably holding the slide and rule against rela
to move its said terminal into locking engage
tive movement comprising a pin carried by the
ment With the walls of the groove, said spring
slide member movable transversely of the longi
and pin constituting the sole locking means for
tudinal axis of the rule, the pin having an ex
the rule, and means for moving the pin against
tension on its inner end with` a lng that is re
the pressure of the spring to release the terminal
of the pin from such locking engagement.
‘i ceived in the groove and which is adapted to
2. In a tool having a slide member into which
bind against the walls of the groove to hold the
a rule is set edgewise with the slide straddling
slide against movement, a spring in the slide
the rule, the rule having a groove along one i'ace
surrounding the pin for yieldably urging it to a
thereof, the invention comprising means for ad
position where said lug is in locking engage
justably holding the slide and rule against rela- -z' ment with the groove, the tension of said spring
tive movement comprising a pin carried by the
slide member movable transversely of the longi
exerting the sole locking force against said rule,
tudinal axis of the rule, the pin having an ex
pin for moving the pin against the pressure ci
the spring to release the lug from locking en
and an operating lever` at the outer end of the
tension on its inner end with a lug that is re
ceived in the groove and which is adapted to bind
il.)
2,404,911
gagement with the groove, and means for holding
the pin against rotation.
6. A slide for universal squares andthe like
comprising a base which is slotted to set edge
wise of a straight edge, a plug screwed trans
versely into the base of the slide and Which is
comprising a base which is slotted to set edge
Wise of a straight edge, a plug screwed trans
versely into the base of the slide and which is
slotted to also straddle the straight edge, the slot
in the plug and in the base of the slide being
continuous, a boss on the base and having a hole
therein in alignment with the plug, a cap mem
slot in the plug and in the base of the slide be
ber on the boss, a pin passing through the plug,
ing continuous, a boss on the base and having a
boss and cap member, the pin havingv a reduced
hole'therein in alignment with the plug, a cap 10 extension at its inner end With a lug for engag
member on the boss, a pin passing through the
ing a groove in the straight edge, a spring around
plug, boss and cap member, the pin having a
the pin having one end abutting against the
reduced extension at its inner end with a lug
plug, said spring exerting the sole locking force
for engaging a groove in the straight edge, a
against said straight edge, an abutment on the
spring around the pin having one end abutting 15 pin against which the other end of the spring
against the plug, an abutment on the pin against
bears, and a lever on the cap bearing against the
which the other end of the spring bears, said
top of the pin for moving the pin axially in
spring exerting the sole locking force against
opposition to the spring, the abutment on the
said straight edge, and a lever on the cap bearing
pin and the cap being interñtted to restrain the
against the top of the pin for moving the pin 20 pin from rotation.
axially in opposition to the spring.
ELMER I. KING.
'7. A slide for universal squares and the like
slotted to also straddle the straight edge, the
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