US673737A - Mortising-machine. - Google Patents

Description

No. 673,737. Patented May 7, I90l. w. J. smnu.

MUBTISING MACHINE n :11 a m 12, 1900. Renewed Fe x i 0 III! Fig-1- (No Model.)

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- No. 673,737. Patented May 7, l90l.

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MORTISING MACHINE.

(Application filed May 12, 1900. Renewed Feb. 7, 1901.) (No Model.) 2 Sheets-Sheet 2.

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' B Y I A TTOHNE rs UNITED STATES PATENT FFICE;

WILLIAM JOHN SMITH, OF DETROIT, OREGON.

MORTlSlNG-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 673,737, dated May '7, 1901. Application filed May 12, 1900. Renewed February 7, 1 901. Serial No. 46,373. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM JOHN SMITH, a citizen of the United States, and a resident of Detroit, in the county of Marion and State of Oregon, have invented a new and Improved Mortising-Machine, of which the following is a full, clear, and exact description.

This invention relates to improvements in machines for forming mortises in Wood-such as window-sashes, doors, and the like; and the object is to provide a machine of very simple construction, comparatively cheap to manufacture, and by the use of which mortises may be quickly out through the wood.

I will describe a mortising-machine embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of a mortising-machine embodying my invention. Fig. 2 is a sectional elevation thereof, and Fig. 3 is a plan view showing the movable table and clamping device employed.

Referring to the drawings, 1 designates an upright or standard on which a work-holding table 2 is adjustable vertically. This table is movable on guide-flanges 3, formed on the upright, and engaging with the rear sides of said flanges are blocks 4, which are attached to the table. An adjusting-lever 5 is fulcrumed on a stud 6, attached'to the upright, and has a link connection 7 with the rear side of the table, and the rear end of this'lever 5 is weighted, as at 8, so as to automatically move the table upward when the lever is released. The table may be held'in any desired position by means of a spring-pressed lever 9, pivoted to the lever 5 and having a hookshaped end adapted to engage in either one of a series of notches 10, formed in the guideflanges 3 of the upright.

Arranged on the vertical back board 11 of the table is an adjustable gage-plate 12, with which the end of the Work operated upon may be engaged. The work may be held tightly against the back board 11 by means of a clamping-lever 13, pivoted to the upper side of the table 2, and when it is moved to this clamping position against the wood or work a pin 14 may be inserted in a hole in the table and engage against the inner side of the handle portion of the lever, as indicated in Fig. 1.

To prevent a vertical movement of the work, I employ a clamping-lever 15, which is pivoted to a bracket 16, attached to the rear side of the table, and this'lever has a series of notches 17 in its upper surface, in either-one of which a locking-pawl 18 may be engaged to hold the lever as adjusted.

Movable in guides 19 and 20, attached to the upright, is a plunger or tool-carrying bar 21, and on the lower end of this plunger or tool-carrying bar is a stirrup 22, to which a cutting-tool 23 is attached. This cutting-tool is made in the form of a hollow or angular chisel, the size of which will be in accordance with the size of the mortise to be cut. The plunger or carrying-rod 21 may be moved up and down manually or by suitable machinery. For moving by machinery a rocking lever may be engaged with theupper end 24 of the plunger. As this machine, however, is designed to be moved from place to place, I prefer to usemeans for operating it manually.-

This means consists of a handle-lever 25, pivoted t0 the upright and having pivotal connection with the plunger, and to automatically move the plunger upward when the bandle portion of the lever is released I provide the rear end of said lever with a weight 26.

Prior to cutting the mortise with the chisel the mortise is to be bored by suitable bits. I have here shown a gang of three hits 27, 28, and 29; but there may be more or less, depending upon the size of the mortise or length thereof to be made. These bits have stepbearings in blocks 30, arranged at the base of the machine, and also have bearings at about the central portion of their shanks in blocks 31, attached to the upright. Each bit on its shank portion'is provided with a pulley 32, with which driving-band 33 engages. This driving-band is here shown as driven from a pulley 34 on the shaft 35. It will be noted that the band passes over the front sides of the pulleys on the outer bits and over the rear side of the pulley on the centralbit. Therefore this central bit, or, in other words, every other bit, should be formed with a left-hand screw, While the others are formed with righthand screws.

To keep the belts under proper tension, I may employ a weight 36 for bearing upon the upper stretch of the belt, while a pulley 37 bears against the lower stretch of the belt, the said pulley being mounted in a lever 38, to the end of which is attached a weight 39.

In operation when the work is placed upon the table 2 and the bits are in rotation the table is to be moved down, so that the bits will pass through the work, the table being provided with an opening 40 for the passage of the bits. After this boring operation the table, with the work, is to be moved upward. Then the chisel is to be forced through the wood, making clean cuts at the sides and ends of the mortise. A steel shoe 41, which is placed in the opening 40 and which is about one-eighth of an inch larger inside than the outside cutting edge of the hollow chisel 23, is to prevent the chisel 23 from tearing the wood out around the edge of the mortise when the chisel 23 is forced through the work. This shoe is regulated in size by the size of the chisel which is to work in connection with it and is removable.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A mortising-machine, comprising an upright, a table adjustable vertically thereon, a gang of bits arranged below the table and adapted to pass through an opening in the table when the table is moved downward, means for simultaneously operating said hits, a plunger movable in the upright above the table, a lever for moving said plunger, a stirrup attached to the plunger, and a cuttingtool removably attached to the stirrup, substantially as specified.

2. A mortising-machine, comprising an upright, a table adjustable vertically thereon,

clamping devices on the table, a gang of bits arranged below the table and adapted to pass through an opening in the table when the table is moved downward, a single band engaging with all the bits, aplunger movable in the upright above the table, a lever for moving said plunger, a stirrup attached to the plunger, and a cutting-tool removably attached to the stirrup, substantially as specified.

3. A mortising-machine, comprising an upright, a table adjustable vertically thereon, means for causing movements of the table, a clamp mounted to swing on the upper surface of the table, another clamp mounted to swing vertically with relation to the table, said other clamp being carried by the table, a gang of bits arranged below the table, and a cuttingtool movable above the table, substantially as specified.

4. A mortising-machine, comprising an upright, a table adjustable vertically thereon, a table-operating lever pivoted to the upright and having link connection with the table, the said lever being weighted at its rear end, a clamping-lever carried by the table for engaging on the upper side of thework thereon, a pawl carried by the table for engaging in either one of a series of notches in the upper side of said clamping-lever, a plunger operating above the table, a counterbalance or weighted lever for operating said plunger, a cutting-tool carried by the plunger, and boring-bits mounted to operate below the table, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of

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