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Патент USA US3026632

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March 27, 1962
G. H. CHARNOCK, JR
3,026,623
_ COMBINATION SAFETY GIB AND LOCKING MEANS FOR STRAIGHT
Filed Dec. 4, 1959
EDGES IN LINE-UP AND REGISTER TABLES
2 Sheets-Sheet 1
GeoWgeHZZ’aat‘
,Jr.
March 27, 1962
G. H. CHARNOCK, JR
3,025,623
COMBINATION SAFETY GIB AND LOCKING MEANS FOR STRAIGHT
EDGES IN LINE-UP AND REGISTER TABLES
Filed Dec. 4, 1959
\
2 Sheets-Sheet 2
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Gear‘ge II.?tfoa'lney
States
' atent
1
thee
3£Z6?23
Patented Mar. 27, 19?2
2
FIG. 5 is an exploded view showing the parts of FIG.
3,026,623
CUMBINATION SAFETY GIB AND LGCKING
MEANS FOR STRAIGHT EDGES IN LINEUP
AND REGISTER TABLES
4 separated from one another.
In the structure shown in the drawings, numeral 2 indi
cates fragmentarily a line-up and register table which is
George H. Charnock, In, 819 Dedham St.,
Newton Center, Mass.
Filed Dec. 4, 1959, Ser. No. 857,325
6 Claims. (Cl. 33-1845)
mounted on a supporting frame or base 4. Numeral 6
indicates a scale of conventional form. Numeral 8 de
notes a vertical rack and numeral 10- denotes a horizontal
It is a chief object of the invention to improve straight
edge construction and to devise a combination safety
gib and lock by means of which one straight edge may
be moved into a working position only when the other
and 7 shown in FIGS. 1 and 2. The rail extensions are
solidly secured to the racks by screws and are formed
rack. These racks are customarily employed to receive
and guide respective straight edge units 12 and 1-4 and
This invention relates to line-up and register tables for
include extensions 8a and 10a which project out from
use in the graphic arts industry and in particular the in 10 the table ‘frame. The straight edge units are mounted
vention is concerned with an improved safety and locking
along two adjacent sides of the table and are provided
means for straight edge assemblies commonly employed
with pivoting arms as 16 and 18. Supported between
on line-up and register tables.
rear extremities of these pivoting arms ‘16 and 18 are
cylindrical stay tubes as 20 and 22 which are adapted to
In conventional forms ‘of tables it is customary to
employ two straight edge assemblies which are adjustably 15 be releasably held in spring holding members as 19 and
mounted on machine cut gear tracks at the upper side of
21 ?xed to an underside of the table. Within the stay
the table so that each assembly may move independent
tubes 20 and 22 are received rotating shafts to which
ly of the other. It is customary to refer to one of the
are pinned gears for meshing with respective racks 8 and
straight edge assemblies as a horizontal straight edge and
10 in the well known manner.
20
the other as a vertical straight edge. Since these straight
In the usual operation of the conventional table struc
edges are designed for a maximum of precision, it is im
ture described one unit is moved back into an unopera
portant to prevent the assemblies from striking one an
tive position with its stay tube engaged in a respective
other and being accidentally damaged or thrown out of
spring holding device, while the other unit is free to move
into any desired position along the table.
adjustment. In actual working conditions there is likeli
hood of a certain amount of accidental movement with 25
In accordance with the invention, I provide along the
the result that it is dif?cult to prevent damage to straight
sides of the gear rack extensions 8a and 16a at points
edge parts.
above the frame brackets 30' and 32, rail extensions 5
with inwardly projecting guide edges as 5a and 7a, and
at their inner ends the rail extensions abut against the
corner surfaces of the table. At points just in front of
in a safety position such that it is prevented from any
the abutment of the rail extensions with the respective
movement while the ?rst noted straight edge is being 35 corner surfaces, I further form in each of these extension
used.
rail members slots as 38 and 40. (FIG. 1.) These slots
Another object of the invention is to devise a simple
3'6 and 4!} are chosen of a width and depth adapted to
and efficient gib and lock arrangement which can be
receive therethrough straight edge slides 42 and 44 which
readily attached to conventional forms of line-up and
are ?xed to slide hangers 46b and 48b. The slide hangers
register tables without changing or modifying the struc 40 45b and 48b are mounted over the ends of the respective
ture or operation of such tables.
stay tubes 20 and 22 which extend through bearings as
Still another object is to combine a gib and locking
20', one of which is shown in FIGS. 4 and 5. The slides
element for each straight edge assembly in such a way
42 and 4M- are movable with the straight edge members
that the step of moving one straight edge assembly back
along the rail extensions 5 and 7 respectively. As shown
against its respective holding stop will automatically move
in FIGS. 4 and 5, for example, the member 44 is slidably
its respective locking element .out of a locking position
engaged against the under surface of inwardly projecting
with respect to the other straight edge and similarly move
guide edge 7a. Similarly, the member 42 is slidably en
straight edge is located back against a holding mechanism
ment of the other straight edge into a working position
will automatically set its locking element in a position to
prevent accidental travel of the ?rst noted straight edge.
These and other objects and novel features will be more
fully understood and appreciated from the following de
scription of a preferred embodiment of the invention
selected for purposes of illustration and shown in the
accompanying drawings, in which:
FIG. 1 is a fragmentary perspective view of a precision
table of the class referred to showing both vertical and
horizontal straight edges moved back against their re
gaged against the under surface of inwardly projecting
guide edge 5a.
An important feature of these straight edge slide mem
bers 42 and 44 is the provision of raised stops or gibs 46
and 48. As shown in FIGS. 4 and 5 stop or gib 43 con
sists of an elongated plate mounted on posts as 50 solid
ly anchored at the upper side of slide element 44. Simi
55 larly, stop 46 is mounted on posts as 52 on slide 42.
These gibs 46 and 48 are formed with vertically extend
ing lugs as 46a and 48a which are adapted to overlie
the extension rails 5 and 7 in such a manner that in an
spective holding stops and further showing respective com
advanced position of either one of the slides its gib lug
bination safety gib and lock units attached thereto;
60 will extend across and block the slot of the oppositely
FIG. 2 is a view similar to FIG. 1 and further show
located extension rail. This is best illustrated by the
change in position of gib lug 48a from the retracted posi
ing the position assumed by one of the straight edges
tion of FIG. 1 to the advanced position of FIG. 2. As
when disengaged from its holding stop and moved for
wardly into a position to prevent movement of the other
straight edge assembly;
FIG. 3 is a detail vertical cross section showing the
safety gib and locking element of one straight edge assem
bly in a position to prevent movement of the other straight
edge assembly;
may be readily seen from an inspection of FIG. 2, the
slide 42 is effectively blocked from advancing out of its
fully retracted position in which it is normally held by
holding spring ‘19. A similar situation is present when
these members are reversed in position.
Another important feature of the straight edge slide
FIG. 4 is a view in side elevation of the combination 70 arrangement are two secondary locking mechanisms.
Each .locking mechanism functions to maintain an oppo
gib and lock components of one assembly removed from
site extension rail slot in a fully blocked state even when
the table; and
3,026,623
3
4
its respective straight edge is advanced foiwardly to a
point where its gib lug is no longer blocking the slot.
Each secondary locking mechanism moves into and
ing extremities for engaging in the slotted portions of the
said rail members.
2. In a table having rail extension members formed
with slots and respective straight edge units movable along
out of a locking position in response to movement of a
respective straight edge gib lug. The secondary locking
mechanisms include narrow lock plates 58 and 6t}
vreceived against rail extensions 5 and 7. Plate 60 is
shown in FIGS. 4 and 5 and is formed with an elongated
5
the rail extension members the combination of slide
elements constructed and arranged on the straight edge
units for blocking the slots in one position of advance
ment of the slide elements, and locking plate means for
slot 64 through which project spaced apart studs 66 and
blocking said slots when the said slide elements are in
68 on rail extension 7. Cap screws 7t} and 72 slidably 10 another position of advancement.
maintain the lock plate against the side of rail extension
3. In a line-up and register table of the class described,
7 and a coiled spring 74 anchored between the stud 66
a pair of straight edge units mounted for independent
and an olfset end 76, normally seeks to urge the lock
movement at the upper side of the table along paths of
plate from right to left as viewed in FIG. 4. However,
travel which extend at right angles to one another, ex
when the slide 44 is in a retracted position, for example,
tension members for supporting the straight edge units
the gib lug 48a engages against the inner end of lock
in retracted positions at adjacent sides of the table, said
plate 60 and pushes lock plate 60 back into a position as
extension members including slotted portions, slide ele
shown in solid lines in FIG. 4.
ments ?xed to the straight edge units and movable along
In the event that the slide is advanced to a point where
said extension members into and out of engagement
20
the gib lug passes by the slot 40 then the lock plate ad
with the slotted portions in response to change in posi
vances and the inner notched end 60a of the lock plate
tion of respective straight edge units, each of said slide
engages through the slot of the opposite rail extension 5
elements including a blocking gib vertically disposed along
while the relieved surface 60!) stops against the surface of
one side of an extension member, locking plate means
the rail extension immediately below the slot. Then the r resiliently supported on each of respective extension mem
straight edge slide on the rail extension 5 is completely
bers in the path of travel of the blocking gib and spring
locked out of operation in all advanced positions of the
means for advancing said locking plate means into a
straight edge on extension rail 7. Movement of the ad
blocking position when a respective straight edge unit is
vanced straight edge to a retracted position results in the
in an advanced position.
gib lug 48a automatically engaging the lock plate and
4. In a lineup and register table of the class described,
carrying it back to the position shown in solid lines in 30 the combination of rack elements secured at the upper
FIG. 4. It will be understood that the separated com
side of the said table and projecting outwardly from two
ponents of the gib and lock combination shown in FIG.
adjacent edges of the table to provide rack extensions,
5 are duplicated for the remaining straight edge assembly.
a pair of straight edge units adapted to be supported in
It is pointed out that the entire unit of rail extension,
a retracted position on the extension racks and movable
35
gib, slide, and lock plate may be installed without chang
across the table along paths of travel which extend at
ing the machine parts or its method of operation and the
right angles to one another, and a dual locking mechanism
installation of the lock plate and spring may be easily
for locking one of the straight edge units in a retracted
and cheaply carried out.
position when the other of the straight edge units is in
From the foregoing description it will be evident that
an advanced position, said dual locking mechanism in
I have devised an improved form of straight edge and
cluding a pair of slotted rail members secured to the rack
slide locking mechanism which is operated whenever a
extension to de?ne slideways and a pair of slides ?xed
straight edge is moved into an advanced position so that
to the straight edge units and cooperating with the slotted
the remaining straight edge may not be accidentally ad
rail members to selectively block the slideways.
vanced, and the lock is automatically disengaged and re 45
5. A structure according to claim 4 in which each of
set whenever a straight edge slide is moved from a lock
the said slides presents a vertical gib portion movable
ing position to a retracted position.
along one slotted rail member into an overlapping posi
Although I have disclosed a preferred embodiment of
tion with respect to a slideway of the remaining slotted
the invention, various changes and modi?cations may be
rail member.
practiced in keeping with the scope of the invention as 50
6. A structure according to claim 5 further including
de?ned by the appended claims.
a pair of lock elements slidably supported on respective
I claim:
slotted rail members. and spring means for urging a lock
1. ‘In a line-up and register table of the class described,
element on one rail member into blocking relationship
a pair of straight edge units mounted for independent
with respect to the slideway of an adjacent rail member
movement at the upper side of the table along paths of 55 and the extremities of said lock elements being located
travel which extend at right angles to one another, exten
in the path of travel of the said vertical gib portions
sion rail members for supporting the straight edge units
whereby the lock elements may be withdrawn from a
in retracted positions at two adjacent sides of the table,
locking position when the vertical gib portions are re
said extension members being formed with slots, slide
moved into a retracted position.
members secured to each of the straight edge units for 60
References Cited in the ?le of this patent
movement over said slots, vertical gib portions movable
with respective slide members into positions of overlap
UNITED STATES PATENTS
ping relationship with respect to the slots, locking plate
means resiliently supported on the said extension mem
bers, said locking plate means presenting recessed lock
1,977,213
2,901,832
Slobey ______________ __ Oct. 16, 1934
Hulen _______________ __ Sept. 1, 1959
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