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Патент USA US3095031

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June 25, 1963
3,095,021
.v E. L. SCHLAGE ETAL
I
I STRIKE PLATE MORTISING 'rooz.
Original Filed April 13,‘ 1959
3 Sheets-‘Sheet 1
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June 25, 1963
E. L‘ SCHLAGE ETAL
3,095,021
STRIKE PLATE MORTISING TOOL
Original Filed April 13, 1959
3 Sheets-Sheet 2
INVEN TORS.
ERNEST L. SCHLAGE
BY
ARMIN H. GREEN
6%” 777% ‘hm/Mc
June 25, 1963
E. L. SCHLAGE ETAL
3,095,021
STRIKE PLATE MORTISING TOOL
‘
Original Filed April 13, 1959
3 Sheets-Sheet 3
INVENTORS.
E
BY
ST L. SCH
GE "
MIN H. 6R
6744M *mym'fwnd
United States Patent 0 M
3,095,021
Patented June 25, 1963
1
2
3,095,021
to receive the latch bolt of the door therein when the
latter is in closed position. The method of forming re
STRIKE PLATE MORTISING TOOL
Ernest L. Schlage, Burlingame, and Armin H. Green,
San Mateo, Calif., assignors to Schlage Lock Com
cess 20 will now be described.
angs:
and lower semicylind-rical endwalls 34, 35 respectively.
As vbest seen in FIG. 8, the operation of installing the
strike and strike box is commenced by establishing a
pany, a corporation
point 25 of the face 5 of jamb 1. This point 25 should
Original application Apr. 13, 1959, Ser. No. 805,819, now
be on the central axis of the latch bolt of the door when
Patent No. 3,057,053, dated Oct. 9, 1962. Divided
the door is closed and may be marked by means of a
‘and this application Apr. 28, 1961, Ser. No. 92,096
marking tool such as that illustrated on Russel Patent No.
2 Claims. (Cl. 145-25)
10 2,638,682. Said reference patent illustrates a method of
marking point 25 so that the same is on the axis of the
This application is a division of application Serial No.
‘bore that receives the latch bolt which axis, of course,
805,819 ?led April 13, 1959 now Patent No. 3,057,053,
corresponds to the central axis of the latch bolt.
dated October 9, 1962.
By means of a tool, which will subsequently be de
The invention relates to a strike for a door and par
ticularly to an apparatus for installing a strike plate and 15 scribed, a pair of points 26, 27 are then established at
equal ‘distances above and below point 25. A boring bit
its associated box.
is then applied to points 26, 27 successively and holes
The main object of the invention is the pro-vision of
are bored with said points as centers and to ‘the desired
an improved means for installing a strike plate and strike
depth of recess 20. Since the bores intersect in the ex
box on a doorjamb in an accurate manner.
ample shown in FIG. 2 the small portions of the jamb
Another object of the invention is the provision of a
remaining between the bores indicated schematically ‘by
tool for forming the mortise that receives the strike or
dotted lines 28, 29 in FIG. 2 are readily removed by a
strike plate and which tool is foolproof in operation re
chisel.
quiring only a minimum amount of judgment by the user.
The recess 20 thus formed is provided with a pair of
Other objects and advantages of the invention will be
seen from the following speci?cation and from the draw 25 vertically extending parallel sidewalls 32, 33 and upper
FIG. 1 is a perspective of one form of strike box made
in accordance with the invention.
FIG. 2 is a perspective of a portion of a doorjamb
Said recess 20 is adapted to receive therein a strike
box 36 such as that illustrated in FIG. 1. Said box is
formed from relatively thin material such as sheet steel
about to be applied to a doorjamb.
FIG. 7 is a vertical ‘cross section of the assembled tool
recess 20.
and includes a bottom 37, opposite sidewalls 38, 39 ‘and
prepared to receive the strike and strike box.
upper and lower endwalls 40, 41.
FIG. 3 is a perspective similar to FIG. 2 showing the
Integral with upper and lower endwalls 40, 41 are
strike box of FIG. 1 installed.
lugs 46, 47 respectively which are adapted to ?t against
FIG. 4 is a perspective similar to FIG. 2 showing the
the bottom 19 of mortise 7 when the box is received
strike installed over the strike box.
FIG. 5 is an exploded perspective of the various ele 35 in recess 20 as seen in FIG. 3. As an additional posi
tioning means lugs 48, 49 in continuation of sidewalls 38,
ments of the mortise forming and locating tool.
39 may also be provided to lap over the open side of
FIG. 6 is a vertical cross section of the assembled tool
Lugs 46, 47 are apertured as at 50, 51 for
receiving therethrough screws 52, 53 (FIG. 4) which se
cure the strike to jamb 1.
As seen in FIG. 1, strike box 36 is formed so that
tion.
the junctures 56, '57 between sidewalls 38, 39 and end
FIG. 8 is a perspective of a doorjamb showing sche
wall 40 are formed to about the same radius as the bores
matically the various markings involved in the invention.
which formed recess 20. Similarly junctures 58, 59‘ be
‘FIG. 9 is a perspective of the assembled tool.
In detail, and with reference ?rst to FIGS. 2, 3, 4 and 45 tween sidewalls 38, 39 ‘and endwall 41 are formed to the
same radius. The spacing between sidewalls 38, 39 is
8, the invention is adapted to be employed in a door
also predetermined so that box 36 is snugly received in
installation that includes a doorjamb 1 provided with a
recess 20. It will be apparent from this structure, al
doorstep ‘2. It will be understood that the door (not
though clearance exists between the endwalls 40, 41 of
shown) swings from a doorjamb opposite jamb 1 and one
face of the door ?ts, in its closed position, against the 50 box 36 and the semicircular endwalls 34, 35 of recess
20, the box 36 will nevertheless be automatically cen
face 3 of the stop 2 with the opposite face of the door
tered relative to recess 20 with the endwalls 40, 41
usually substantially coplanar with the face 4 of the
showing the same applied thereto in mortise cutting posi
jamb 1.
equally spaced from the point 25 (FIG. 8) which repre
curved to cam the latch bolt (not shown) to an inner
retracted position relative to the door as the door ap
to be struck by a hammer.
sents the central axis of the latch bolt. Interference be
By the present invention a conventional relatively shal~
low strike mortise 7 is formed in j‘amb 1, having upper 55 tween the latch bolt and the strike box is therefore effec
tively obviated.
and lower sides 8, 9 respectively and front and rear sides
The tool for locating and forming the strike will now
10, 11 respectively.
A strike 14 (FIG. 4) is adapted to be received within
be described:
the mortise shown ‘in FIG. 2 and the depth of said mortise
As #best seen in FIG. 5, the tool comprises a body 60 of
is equal to the thickness of the strike 14 so that the outer 60 any suitable material such as resilient plastic provided
face of the latter is coplanar with the face 5 of jambr 1.
with a generally rectangular head 61 and a handle por
Strike 14 is provided with an integral lip 15 which is
tion 62 provided with an end face 63 (FIG. 6) adapted
proaches closed position.
To accommodate said lip 15 the mortise (FIG. 2) is
enlarged to provide a channel portion 16 extending from
the ‘front side 10 of the mortise to the front face 4 of
jamb 1. Said channel portion 16 is de?ned by upper side
65
On the side of head 61 opposite handle portion 62
there are secured a pair of channel shaped cutters 66, 67.
Cutter 66 comprises a web 68 connecting a pair of ver
tically extending ?anges 69, 70 formed with cutting edges.
Similarly, cutter 67 comprises a web 72 connecting a
70 pair of horizontally extending ?anges 73, 74 also formed
17 and lower side 18.
with cutting edges. Flanges 73, 74 are slightly deeper
The bottom 19 of the mortise 7 is provided with a
than
?anges 69, 70 so that when cutters 66, 67 are se
central recess generally designated 20 which is adapted
3,095,021
3
4
cured together to head 61 the cutting edges thereof are
tioning his boring tool to start ‘boring the bores for recess
20.
substantially coplanar (FIG. 6).
Flange 70 of cutter 66 is provided with a pair of
Screws 102, 103 which are, used to secure the cutters
notches 78, '79 which are spaced apart a distance which
to the head are also provided with points 130, 131 which,
indicates to the carpenter the points in mortise 19 at, 5 when the cutters are assembled, are preferably about co
which the channel 16 should be cut to accommodate lip
planar with the cutting edges thereof. In this manner
15 of the strike. Thus, as shown in FIG. 8, the notched
the operation of forming the cuts shown in FIG. 8 also
?ange 70 marks colinear line segments 82, 83, 84, and it
results in the jamb being indented by points 130, 131
is a simple matter for the carpenter to cut, with his chisel,
_; of screws 102, 103 to indicate the axes of the holes to be
the upper side 17 and lower side 18 of the channel por j 10 drilled by the carpenter for receiving screws 52, 53.
tion 16 of mortise 19 which receives lip 15 of strike 14.
' It will therefore be apparent that the above-described
It will be noted that the ends ‘of lines ‘82, 84 de?ne the,
tool will, in one operation, cutjthe jamb for sinking the
width of channel 16 and to this end the notches 78, 79 are
strike, locate the holes to be bored ‘for forming the recess
formed so that ends of said lines are well de?ned.
vto receive the strike box, and also locate the screw holes
In a similar manner ?ange 69 of cutter 66 is provided
for receiving the screws which; are used to secure the
with notches ‘76, 77 which may also be employed for the
strike to the jamb.
same function as notches 78, 79 on ?ange '70. By provid
Referring again to FIG. 4 it is seen that forceable re
ing notches on both ?anges it is not necessary to hold
moval of strike 14 is resisted, not only by screws ‘52, 53
the tool with any particular side up or down to make the
but also by the narrow strips 148, 149 of the jamb 1 that
proper cuts. Furthermore, the cuts made by the tool are 20 remain after the mortise 7 (FIG. 2) is formed. The
always correctly positioned regardless of whether the door
manner of mortising the strike shown in FIGS. 2, 3 and 4
is left or right hand.
is therefore desirable for this reason.
It will be understood that the sharpened upper ?ange
The above speci?c descriptions of the preferred ‘forms
73 of cutter 67 forms the cut 86 in FIG. 8 and lower
of the invention are not to be taken as restrictive of the
'Flange 69, of course, forms 25 same as it is obvious that various modi?cations at to
?ange ‘74 forms cut 87.
colinear cuts 88, 89, 90. The fact that the cuts de?ning
the mortise 19 are spaced apart slightly does not affect
the e?‘icacy of the tool as it is a simple matter to join up
the adjacent cuts by means of a chisel.
Cutters 66, 67 are secured together and to head 61
‘of body 60 by means of a pair of internally threaded
?anged sleeves 94, 95, which are passed through holes
96, 97 in web 68 of cutter 66 and holes 98, 99 in web ‘72
of cutter 67. A pair of bores 100, 1011 are formed in
details may be made without departing from the spirit
of the invention.
,9 We claim:
_ l. A strike plate mortise form-ing tool comprising: a
30' body provided
with a rectangular cutting frame formed
with coplanar cutting edges adapted to be embedded in
the jamb of a door, a locating element having a pointed
outer end and- extending outwardly of said ‘body and said
. cutting edges and'slidably'disposed in said body, a spring
head 61 to receive said sleeves and screws 102, 103 are 35 in saidhody for urging said element outwardly thereof
threadedly secured in sleeves 94, 95 from the opposite
side of head 61‘ (FIG. 6).
at all times,'whereby said frame may be located relative
to a point on said jamb by applying the outer end of said
element to said ‘point and urging said frame against said
jamb against the force of said‘. spring, a pair of marking
‘Before said cutters are secured to head 61, a guide pin
104- and a pair of marking pins 105', 106 are mounted on
head 61.
40 points carried by said body on’ opposite sides respectively
Pin 104 is relatively long and is provided with an en
of said element and adapted to be embedded in said jamb
larged head 108 which is slidably received in an elongated
when said cutting edges are forced against said jarrrb.
bore 109 in head ‘61. Also received in bore 109 is a
- 2. A strike plate mortise forming too-l comprising: a
compression spring 110 (FIG. 6) which serves to urge
body provided with a rectangular cutting frame formed
pin 104 outwardly of said bore at all times. Upon assem 45 with coplanar cutting edges adapted to be embedded in
bly of the cutters 66, 67, pin 104 is slidably received
the-jambr-of a (1003a locating element having a pointed
through holes 111, 112 in said cutters respectively. Pin
outer end and extending outwardly of said body and said
104 is formed to a point 114 at its end opposite its head
cutting edges and slidably disposed in said body, a spring
108 so as to be received in the indentation formed ‘by the
in said body for urging said element outwardly thereof at
locating tool and which indentation has hereinbefore been
all times, whereby said frame may be located relative to
described as point 25 in FIG. 8.
a point on said jamb by applying the outer end of said
In use, it is a simple matter to apply the pointed end
element to said point and urging said frame against said
of guide pin 104 to the point ‘25 of FIG. 8 and then urge
jamb against the force of said spring, a ?rst pair of mark
the cutters 66, 67 against the jamb 1 against the force of
ing points carried by said body on opposite sides respec
spring 110. It is, of course, necessary to line up cutting
tively of said element and adapted to be embedded in said
?anges 69, 70 vertically before striking handle 62 with a
jamb when said cutting edges are forced against said
hammer, but this is a simple matter because the car
jamb, and a second pair of marking points carried by said
penter has adjacent vertical surfaces as reference planes.
body on opposite sides respectively of said element and
Marking pins 105, 106 are also provided with enlarged
outwardly‘ of said ?rst pair for marking the position of
heads 116, 117 respectively which are received in bores
screw holes for such strike plate.
118, 119 in head 61. The depth of bores 118, 119 is
equal to the length of heads 116, 117 so that said pins.
References‘ Cited in the ?le of this patent
are ?rmly secured in said bores. ‘Holes 122, 123 are
UNITED STATES PATENTS
provided in cutter ‘66 and holes 124, 125 are provided in
'cutter'67 for receiving said pins 105, 106 therethrough, 65 1,083,529‘
Fletcher ______________ __ Ian. 6, 1914
and the length of said pins is predetermined so that their
1,646,588
McDowell ____________ __ Oct. 25, 1927
pointed ends 126, 127 extend slightly beyond the plane of
2,422,367
Zuigley ______________ __ June 17, 1947
the cutter edges of the cutters 66, 67. In this manner,
2,698,636
S‘chlage _______________ __ Jan. 4, 1955
when the mortise forming ‘cuts are made by the cutters
2,809,440
Schlage ______________ __ Oct. 15, 1957
as shown in FIG. 8 indentations at points 26, 27 are also
made so that the carpenter has de?nite marks for posi
2,938,554
Schlage _______________ __ May 31, 19601
2,961,773
Honn ________________ __ Nov. 29, 1960
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