US2938554A

US2938554A - Mortising tool for faceplates

Info

Publication number: US2938554A
Application number: US799131A
Authority: US
Inventors: Ernest L Schlage
Original assignee: Schlage Lock Co LLC
Current assignee: Schlage Lock Co LLC
Priority date: 1959-03-13
Filing date: 1959-03-13
Publication date: 1960-05-31
Anticipated expiration: 1977-05-31

Description

y 1960 E. L. SCHLAGE 2,938,554

MORTISING TOOL FOR FACEPLATES Filed March 13, 1959 FIG I United States Fatent O l MORTISING TOOL FOR FACEPLATES Ernest L. Schlage, Burlingame, Calih, assignor to Schlage Lock Company, a corporation Filed Mar. 13, 19515. No. 199,131,

Claims. Cl. 145-25 This invention relates to a mortising tool adapted to be used in forming a shallow mortise in the edge of a door in which is received the faceplate of a latch or lock unit.

In the installation of modern cylindrical and tubular locks a hole is bored in the door from the edge parallel to the opposite faces of the door for the purpose of receiving therein the latch housing. A rectangular faceplate is then secured by screws to said edge so that the latch bolt projects therethrough. By the present invention a tool is provided for defining and partially forming the shallow rectangular recess or mortise within which the faceplate is received. Said mortise is located, by means of the tool herein disclosed, in its correct position relative to said bore.

Heretofore, various tools have been provided for cating and forming the faceplate mortise. One example of such prior art tools is disclosed in Quigley Patent No. 2,422,367, dated June 17, 1947. I

The main object of the present invention is the provision of a more rugged and accurate tool than has heretofore been provided.

Another object 'of the invention is the provision of a mortising tool which incorporates marking means for marking the proper location of the screws which secure the faceplateto the door; In this connection it will be understood that if the carpenter drills holes in the door edge for the faceplate screws and said holes arenot properly located relative to'the faceplate mortise some difiiculties may be encountered in properly positioning the faceplate. For example, the faceplate may not be guided into the mortise when the screws are tightened or the screws may be cocked relative tot he faceplate 'resulting in the sharp edges of the countersunk screws projecting beyond the outer surface of the faceplate.

Still another object of the invention is the provision of a mortising tool in which the portion of the tool which enters the latch housing bore to guide the cutters to the proper positions on the door edge is integral with the body of the tool thus enhancing the accuracy of the tool.

Yet another object of the invention is to simplify the construction of the mortising tool and reduce the number of parts thereof by incorporating the screw hole marking means with the cutter securing means.

Other objects and advantages will be seen in the following specification and in the drawings wherein:

Fig. l is a vertical fragmentary section through a door showing the tool in section.

Fig. 2 is a fragmentary perspective of a door showing the here which receives the guide portion of the tool therein.

Fig. 3 is a perspective of the tool.

Fig. 4 is an exploded perspective of the various portions of the tool in their proper relative positions.

In detail, and with reference first to Figs. 1 and 2, the invention is adapted to be used on a door generally designated 1 having an edge 2 in which a bore 3 is formed 2,938,554 Patented May .31, 1960 ice for receiving therein the latch unit, not shown. A larger bore 4 (Fig. 1) is also formed in the door extending between the opposite faces 5 for receiving therein the latch actuating mechanism which is not involved in the present invention.

The tool comprises a body generally designated 7 which includes a relatively heavy rectangular portion 8. Projecting from one side of portion 8 and integral therewith is a guide member 9 which is cylindrical in form to be snugly but slidably received in bore 3. Preferably said guide member is cut away to provide a pair of vertically extending flat faces 10, 11 (Fig. 4) for 'a purpose to be described.

Projecting from the opposite side of the rectangular portion .8 of body 7 is an elongated generally cylindrical handle portion 14 provided with a flat axially outwardly directed face 15 (Fig. 1) which is adapted to be struck by a hammer while the'handle 14 is held by the user.

A pair of channel shaped cutter members generally designated 17, 18 are adapted to be secured against the axially directed face 19 of the rectangular body portion 8. Cutter 17 is provided with a pair of vertically extending

flanges

20, 21 connected with a web 22. In a somewhat similar manner, cutter 18 is provided with a pair of horizontally extending

flanges

24, 25 connected by a web 26.

Flanges

20, 21 of cutter 17 are slightly narrower than

flanges

24, 25 of cutter 18 so that when said cutters are placed together with their webs in engagement as shown in Fig. 3 the cutting edges formed on the flanges of both cutters are all coplanar and form a rectangular cutting frame around boss 9.

To permit said cutters to pass over guide member 9

thewebs

22, 26 are provided with

central openings

28, 29 respectively which are complementary in shape to guide 9. It will be noted that the vertically extending

straight edges

31, 32 of opening 28 and the vertically extending

straight edges

33, 34 of opening 29 are positioned alongside the vertically extending flat faces 10, 11 of guide 9 thus insuring that the cutting edges of one cutter are exactly perpendicular to the cutting edges of the other cutter.

. For the purpose of securing the

cutters

17, 18 to the rectangular portion 8 of body 7 the latter is provided with a pair of axially extending

holes

37, 38 adapted to receive therein sleeves 39, 40 (Fig. 4). Cutter 17 is provided with

corresponding holes

41, 42 and cutter 18 is provided with

holes

43, 44 also for receiving

sleeves

39, 40 therethrough.

Sleeves

39, 40 are provided with

annular flanges

45, 46 respectively which engage the web 22 of the outer cutter 17 when the various parts are assembled as shown in Fig. 3. Said

sleeves

39, 40 are internally threaded for threadedly receiving therein screws 49, 50 (Fig. 4).

Rectangular portion 8 of the body 7 is provided with a pair of enlarged bores 51, 52 (Fig. l) in extension of

bores

37, 38 so as to receive therein the

heads

53, 54 of screws 49, 50 respectively.

Screws 49, 50 are formed at their ends to provide points or

markers

57, 58 which are adapted to mark the proper position of the screws which secure the faceplate to the door.

As best seen in Fig. 1 the length of

holes

37, 38 and the length of

sleeves

39, 40 and screws 49, 50 are predetermined to when said screws are tightened the

points

57, 58 are substantially coplanar with the plane of the cutting edges of

cutters

17, 18 so that the operations of cutting the mortise and embedding the markers in the door edge are performed simultaneously.

In operation the guide 9 of the assembled tool is inserted in bore 3 of the door with the cutting edges of cutter 17 vertical and, of course, parallel to the opposite faces 5 of the door. When the cutting edgm are The

vertical cutting flanges

20, 21 are thus embedded'in the door to form

cuts

60, 61 and the

flanges

24, 25

form cuts

62, 63. At the same-time, points 57, 58-

form indentations

64, 65;, 1 i. i 7 i 7 It is then a simple matter for the carpenter to drill the two holes for receiving the faceplate screwsfand to chisel out' the shallow mortise "defined by lines 60, A

61, 62, 63 to receive the faceplate. g

It will be noted that thecutting edges do not actually intersect each other but terminate short of each other. It is a simple matter, however, for the carpenter to complete the rectangular cut with his chisel.

The above described tool is relatively inexpensive to make and is foolproof in operation. In additiongthe cutters are easily removed andrepla'ced when it becomes necessary to sharpen theme The abovedetaileddescriptionof the preferred form of the invention is not to be taken as restrictive thereof as it is obviousthat various modifications in design may be resorted to withoutdeparting from the spirit of the invention as defined in the following claims.

I claim: a g

1. A mortising tool for use in installing a faceplate on an edge of a door provided with a bore opening outwardly of said edge, comprising: a body provided at one end with a boss adapted to be received in said bore, a pair of channel shaped cutters each provided with a pair of parallel cutting edges, means for securing said cutters to said body with the cutting edges of said cutters coplanar and defining a rectangle cutting frame around said boss, said boss projecting from said body substantially 'beyond the plane of said edges to guide the latter to predetermined positions relative to said bore, said means including a pair of pointed elements extending outwardly of said body and adapted to be embedded in said edge for defining the location of pointed screws for securing such faceplate to the door. 7

2. A mortising tool for use in installing a faceplate on an edge of a door provided with a bore opening outwardly of said edge, comprising: a body provided at one end with a boss adapted to be received in said bore, a pair of channel shaped cutters each provided with a pair of parallel cutting edges, means for securing said cutters to said body with the cutting edges of said cuttercoplanar and defining a rectangle cutting frame around said boss, said boss projecting from said body substantially beyond the plane of said edges to guide the latter to' predetermined positions relative to said bore, said means comprising a pair of internally threaded sleeves passing 4 through said cutters and a pair of pointed screws threadedly secured in said sleeves and extending outwardly of said body and adapted to be embeded in said edge for defining the location of screws for securing such faceplate to'the door.

3. A mortising tool for use in installing a faceplate on an edge of a door provided with a bore opening outwardly of said edge comprising: a body provided at one end with a boss adapted to bereceived in said bore and at its other end with a handle portion adapted to be struck by a hammer, a pair ofchannel shaped cutters centrally aperture'd to receive said boss therethrough and each provided with a pair of parallel cutting edges, said cutters being removably-secured torsaidibody with said cutting edges coplanar and defining a rectangular cutting frame, means for so 'securing'said cutters to said body comprising a pair of sleeves'passing through said cutters and into said body, flanges on said sleeves adapted to engage the outer one of said cutters,vand a pair of pointed screws .threadedly secured within said sleeves and projecting outwardly thereof and adapted to be embedded in said edge for defining the'locatio'n of screws for securing such faceplate to the door.

4. A mortising tool for use in. installing a faceplate on an edge of a door provided with a bore opening outwardly of said edge comprising: a body provided at one'end with an integral boss adapted to be received in said bore, a pair of channel shaped cutters each provided with a pair of parallel cutting edges, means for securing said cutters to said body with the cutting edges of said cutters coplanar and defining a cutting frame around said boss, said'boss projecting 'from said-body -"sub'stantially beyond the plane of said e'dgesfto guide i the latter to predetermined positions relative to said bore,

saidf boss being noncircular in cross section and said cutters being provided with complementarily formed openings therein to receive said boss therethrough to preto each other.

ventrotation of the cutters with relation vto the boss and 5." A mortising tool as defined in and by claim 4 wherein the boss has opposite flate surfaces and the openings inthe cuttersare complementary to the cross sectional shaped the boss.

References Cited in the file, of this patent UNITED STATES PATENTS