US437657A - Hinge-mortising machine - Google Patents

Description

( No Model.) J. A MACKENZIE 2 Sheets-Sheet 1.

HINGE MORIISING MACHINE.

Patented Sept. 30, 1890.

llllllllllll (No Medal.) J. A MAC ENZIE. Sheets-Sheet 2.

HINGHMORTISING MAOHINE. 7 N0. 43-7 ,657.- Patented Sept. 30, 1890.

UNITED STATES PATENT OFFICE.

JAMES A. MACKENZIE, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO JOHN J. OOMSTOCK, ALBERT W. STORMS, AND JOHN H. WILLARD, OF CHICAGO,

ILLINOIS.

HINGE-MORTISING MACHINE.

SPECIFICATION forming part of Letters Patent No. 437,657, dated September 30, 1890.

Application filed February 1, 1890. Serial No. 338,926. (No model.) i

To all whom, it may concern.-

Be it known that I, JAMES A. IVIACKENZIE, of Minneapolis, Minnesota, have invented certain new and useful Improvements in Hinge- Mortising Machines, of which the following is a specification.

My present invention is an improvement upon the mortising-machinedescribed in Patent No. 355,272, issued to me December 28, 1886 and 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 difierent widths it is perfectly adapted to cut gains or mortises of dilferent 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 aknife 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 ento be moved out of engagement when desired.

In my said former patent I described as a means for cutting the gain deeper at its outer edge than at its inner a sliding knife held in an inclined position. In my present construction I secure the same result by a diiferent arrangement, viz: I provide the depth-gage 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 itsinner edge. I also provide a depth-gage of improved construction.

In the accompanying drawings, Figure 1 is a side elevation of the device; Fig. 2 a rear elevation; :Fig. 3 a bottom plan view. Fig. 4 is a front elevation. Fig. 5 is a side elevation, partly in section. Fig. 6 is adetail view of one of the adjustable walls of the knifestock, and Fig. 7 is a cross-section through a block in which a gain or mortise has been cut.

as hereinafter described. At the front of the frame thereis a vertically-projecting member 12, which forms a stock for the front knife 13, whiclrmakes a longitudinal cut in forming the gains or mortises. holding the transverse cutting-knives, and it consists of 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 corre spondinglyformed. The angular portions 15 will lap by each other and be secured by a wedge 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 knifethereby 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 bya 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 en- 14. is a stock for gagement 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 Fig. 4.

' 23 is a depth-gage, held to the frame by means of the set-screws 24, which pass through elongated openings 25 in the gage and are tapped into the frame. The frame is recessed to receive the depth-gage, and the recess is provided with inclined sides, the cross-bar of,

thedepth-gagebeing 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 out 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 said surface. From this it results that the outer side of the gain will be cut deeper than the inner side. If it v be desired to out a gain of uniform depth, the

bearing-feet will be parallel to the sliding knife. I also provide a width-gage 26 and the chip-expeller 27, which are similar' to those described in my previous patent,

1. In a device for forming hinge-mortises, the combination, with the frame having an operating-handle, of a stationary knife-stock for the front knife, laterally-adj ustable 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 asdescribed.

2; In a device for forming hinge-mortises, the combination, with the frame having a stationary stock for holding the front knife, of one or more movable stocks for holding the side knives, a removable sliding knife, and an operating-lever for moving said knife, sub stantially as described.

3. In a hinge-mortiser, the combination,with the cutting-knives, of a depth-gage 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 difierent depths may be out, substantially as described.

4. In a hinge-mortiser, the combination, with the operating-knives, of a depth-gage having its bearing-feet inclined from front to rear, 4

whereby the device is adapted to cut a mortise thicker at its outer than at its inner side, substantially as described.

5. In a hinge-mortiser, the combinatiomwith the front and side knives and a sliding knife movable in ways of the frame, of an operating-lever for. said sliding knife pivoted between its ends upon a fulcru m-rod andadapted to be moved laterally along said rod to take its lower end out of engagement with the sliding knife, substantially as described.

6. In ahinge-rnortiser, the combjnatiomwith the front and side knives and asliding 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, substantially as described.

JAMES A. MACKENZIE. Witnesses:

JOHN H. WILLARD, J OHN J. OoMsTooK.

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