Improvements in Hinge-mortising Machines.
Year: 1890

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by STORMS MANUFACTURING COMPANY, of 236-240,
Carroll Avenue, Chicago, Illinois, United States of America, Manufacturers.]
Improvements in Hinge-mortising Machines.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This invention relates to mortising machines and is designed to improve the
construction of the machine described in United States Patent No. 355,272
December 28th, 1886.
The principal improvement consists in certain features of construction whereby
the device is adapted to cut gains or mortises of different lengths. In my present
construction I provide a knife stock having one or both of its end walls movable
laterally and then by introducing front and sliding knives of different widths it is
perfectly adapted to cut gains or mortises of different lengths.
A further improvement consists in adapting the pivoted lever which is used to
actuate the sliding knife to be moved aside to permit the sliding knife to be taken
out and a knife of different width substituted. This I do by pivoting the handle
upon a rod of such length that said handle may be moved laterally to take its lower
end out of engagement with the rack on top of the sliding knife and thereby free
the latter so that it can be removed. I preferably hold the handle normally in
engagement with the sliding knife by means of a spring which will yield to permit
the knife to be moved out of engagement when desired. In the said former
Patent means are described for cutting the gain deeper at its outer edge than at its
inner which comprises a sliding knife held in an inclined position.
In the present construction secure the same result by a different arrangement,
viz. I provide the depth gauge with bearing feet which are inclined upwardly on
their bearing surfaces from the outer toward the inner ends, and thereby the knives
are tilted with their cutting edges at an angle to the horizontal, so that the chip
removed is thicker on one edge than the other and the mortise produced by the
machine is deeper on its outer than its inner edge. I also provide a depth gauge of
improved construction.
In the accompanying drawings,
Di
1
Figure 5 is a side elevation partly in section.
Figure 6 is a detail view of one of the adjustable walls of the knife stock; and
Figure 7 is a cross section through a block in which a gain or mortise has
been cut.
At
8 represents the main frame of the device and it has a rigid handle 9, by which
it may be grasped and which serves as a head stock or bearing to take the blows of
the mallet. At the rear the frame is bifurcated and the bifurcations, marked 10,
have ways, 11, formed therein for the sliding knife as hereinafter described.
the front of the frame there is a vertically projecting member 12 which forms a stock
for the front knife 13, which makes the longitudinal cut in forming the gains or
mortises. 14 is a stock for holding the transverse cutting knives and it consists of
DO 1

page_text: a head having a slot to receive the knife and a right angular extension 15. This
block or stock 14 will move with its flat side against a flat portion of the frame
beneath the handle and its fellow will be correspondingly formed. The angular
portions 15 will lap by each other and be secured by a wedged shaped screw 16
which passes between them and impinging on their beveled edges forces them
outwardly, one against the rear wall of the frame and the other against the front
knife, thereby not only securing them in place but also securing the front knife in
position. By loosening this screw the side knives may be adjusted to and from
each other and a front knife of suitable length introduced to form any length of gain
or mortise desired. 17 is a sliding knife moving freely in the ways 11 and which is
actuated by a lever 18 turning freely on a fixed rod 19 secured on ears 20 projecting
from the frame. The lower end of the lever engages the rack teeth 17" on
the top of the knife, and by operating the lever the knife may be moved in to
cut out the chip. To permit of the removal and insertion of the sliding knife the
rod 19 is of such length that the lever may be moved laterally thereon to take its
lower end out of engagement with the rack teeth and to do this I prefer to confine
the knife in its operative position by means of the coiled spring 22 having one end
confined against the lug and the other bearing against the lever as shown in Figure 4.
23 is a depth gauge held to the frame by means of the set screws 24 which pass
through elongated openings 25 in the gauge and are tapped into the frame. The
frame is recessed to receive the depth gauge and the recess is provided with
inclined sides, the cross bar of the depth gauge being correspondingly inclined and
fitted into said recess. By loosening the screws and moving said bar the one way
or the other along the inclined recess, it is evident that the depth of the cut may be
regulated. The bearing feet have their lower ends inclined upwardly from front
to rear and it is evident that when they come to rest upon a plane surface the knives
will be in angular position with reference to the said surface. From this it results
that the outer side of the gain will be cut deeper than the inner side. If it be
desired to cut a gain of uniform depth the bearing feet will be parallel to the sliding
knife. I also provide a width gauge 26 and the chip expeller 27 which are similar
to those described in my previous Patent.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is :-
First. In a device for forming hinge mortises the combination with a frame
having an operating handle, of a stationary knife stock for the front knife, laterally
adjustable stocks for the side knives and a sliding knife mounted in ways of the
frame and adapted to be projected between the side knives, substantially as
described.
Second. In a device for forming hinge mortises the combination with the frame
having a stationary stock for holding the front knife, one or more movable stocks
for holding the side knives and a removable sliding knife and an operating lever for
moving said knife, substantially as described.
Third. In a hinge mortiser the combination with the cutting knives, of a depth
gauge having bearing feet inclined from front to rear and an inclined cross bar
fitted to an inclined way of the frame and secured thereto by screws passing through
elongated apertures in the cross bar whereby mortises of different depths may be
cut, substantially as described.
Fourth. In a hinge mortiser the combination with the operating knives, of a depth
gauge having its bearing feet inclined from front to rear whereby the device is
adapted to cut a mortise thicker at its outer than at its inner side, substantially as
described.
Fifth. In a hinge motiser the combination with the front and side knives and a
sliding knife movable in ways in the frame, of an operating lever for said sliding
knife pivoted between its ends upon a fulcrum rod and adapted to be moved laterally

page_text: along said rod to take its lower end out of engagement with the sliding knife,
substantially as described.
Sixth. In a hinge mortiser the combination with the front and side knives and a
sliding knife movable in ways in the frame, of an operating lever for said sliding
knife pivoted between its ends upon a fulcrum rod and adapted to be moved laterally
along said rod to take its lower end out of engagement with the sliding knife, and
a spring adapted to hold said lever normally in engagement with the knife, substan-
tially as described.
Dated this 30th day of Sentember 1890
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.