US418978A

US418978A - Mortising-machine

Info

Publication number: US418978A
Authority: US
Publication date: 1890-01-07
Anticipated expiration: 1907-01-07

Description

4.,Sheets-Sheet 1. v

R. s. & R. GREENLEE. MORTISING MACHINE.

No. 418.978. Patented Jan. 1890.

' (No Model.)

(No Model.) 4 Sheets-Sheet 2. R. S. 85 R. L. GREENLEE. MORTISING MACHINE.

No. 418,978. Patented Jan. 7,1890.

(No Model.) v '4 Sheets-Sheet 3.

R. S. &7 R. L. GREENLEE. MORTISING MAGHINE.

No. 418,978. Patented Jan. 7 1890.

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(No Model.) 4 Sheets-Sheet 4.

R. S. & R. L. GREENLEE. MORTISING MACHINE.

No. 418,978. Patented Jan. 7, 1890.

UNITED STATES PATENT OFFICE.

RALPH S. GREEN LEE AND ROBERT L. GREENLEE, OF CHICAGO, ILLINOIS.

MORTISING-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 418,978, dated January 7, 1890.

Application filed December 15, 1888. Serial No. 293,750. (No model.)

To all whom it may concern.-

Be it known that we, RALPH S. GREENLEE and ROBERT L. GREENLEE, citizens of the United States, and residents of Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in l\Iortising-l\lachines, of which the following is a specification, reference being had to the accompanying drawing-sheets, illustrating the invention.

This invention relates to certain improvements in that class of mortising-machines for which Letters Patent of the United States No. 283,34cl were granted to R. S. Greenlee the 14th day of August, 1883; and it has for its objects to provide improved mechanism for automatically imparting a rapid and uniform reciprocating movementto the chisel and anger, in order to advance the same to the Work and withdraw it from the same; to provide improved mechanism for elevating and lowering the carriage which carries the chisel and anger, and for holding said carriage in any position to which it may be adjusted vertically; to provide for the uniform tension of the driving-belt during the changes in the relative positions of the driving-pulleys in elevating and depressing the carriage; to provide improved means for reversing the movement of the auger-shaft and to arrest the motion of the auger-shaft and carriage instantly; to prevent injury to the same or for other purposes, as may be desired; to provide for accurately regulating the depth to which the mortises are to be cut, and to adapt the machine to cut mortises of different sizes and at different angles in hard or soft wood, as desired, and to accurately determine and regulate the space between the mortises, as more fully hereinafter set forth.

The above-mentioned objects we attain by the means illustrated in the accompanying drawings, in which Figure 1 represents a perspective view of a complete machine constructed according to our invention. Fig. 2 represents a front elevation of the machine. Fig. 3 represents a view in detail of a portion of the mechanism by which the proper tension of the belt is maintained. Fig. at represents a side elevation with a portion of the frame broken away,

so as to show the internal mechanism of the machine. Fig. 5 represents a face view of a loose pulley forming part of the machine, detached, and a friction-band and pawl-lever, by means of which it may be clamped to its shaft; and Fig. 6, a similar view of the said pulley, showing a friction band, whereby the motion of its shaft may be arrested through the medium of suitable mechanism. Fig. 7 represents a view of the under side of the machine as the same would be seen should the machine be turned upon its side. Fig. 8 represents a view in detail of a part of the device for moving the timber-carriage intermittently backward or forward, consisting of the are plate, with a part of the graduated scale thereon, broken away to show an adjustable stop sliding in a slot in said are plate and the grip or friction lever, the lower end of which embraces and turns a shaft, and by the connecting mechanism moves the timber-carriage to properly space the mortises.

Referring to the drawings, the letter A indicates the bed of the machine, which may be constructed of any suitable material, preferably, however, of cast-iron. The forward end of the frame A is provided with vertical grooved ways B, between which a verticallymovable table 0 is arranged, as more fully hereinafter explained. The said table, on each side at its top, is provided with ways D, between which is located a longitudinallymovable carriage E. This carriage is provided with bearings F for the auger-shaft G, which extends longitudinally through the carriage, projecting at each end thereof, the rear end forming a stock for the auger-bit and having a seat for the hollow chisel, which incloses the bit, as usual. The front end of the shaft is provided with a balance-wheel H. The letter I indicates along pulley mounted on the auger-shaft between the bearings, around which the driving-belt K passes. The said belt passes around the driving-pulley L and the intermediate pulleys M N, the latter of which serves to maintainthe belt at a uniform tension, as more fully hereinafter explained. The driving-pulley Q is mounted on the forward end of the main driving-shaft T,which is journaled in bearing-blocks at the side of the frame A, and is provided with a pulley R at its rear end, which is driven by a belt from the driving-wheel of a suitable motor.

. The letters S and T indicate two pulleys, preferably of different diameters, for the purpose hereinafter specified.

U indicates a short shaft, which is journaled in bearing-blocks V and V, secured to the inside of the frame A. Upon said shaft are mounted two loose pulleys W W which connect, respectively, with the pulleys S T by means of belts X Y, the former being crossed so as to rotate the pulleys in opposite directions.

The letter Z, Fig. 5, indicates two fixed pulleys secured to the intermediate shaft U, setting close up against the adjacent faces of the webs of the said pulleys XV and W On these fixed pulleys are fitted loosely the friction-bands A, which are split and bent at about right angles at their adjacent ends, one of the bent ends of each band being secured to the Web of the pulley by means of a screw A To the said screws A are fulcrumed the pawl levers or dogs B, the short arms of which are bent at right angles, so as to set over the bent free ends of the friction-bands, the long arms of said pawl levers or dogs being bent outwardly at an angle toward each other, as shown in Fig. 4 of the drawings.

Between the pulleys and mounted on the intermediate driving-shaft U is located a sliding collar 13*, the opposite edges of which are beveled, so that when brought to bear against the bent ends of the long arm of either of the pawl levers or dogs B it will cause the short arm of said lever to bear against the free end of the friction-band and bind it to the fixed pulley Z, so as to carry it with it and give motion to the intermediate shaft. To the collar 13* is connected a vertical arm 0, which is attached to a rod D, located loosely in bearings E, so that it can be reciprocated back and forth in order to throw the collar into contact with either of the levers B to reverse the motion of the shaft or to disengage the said collar from both pawllevers. The rod D is connected at its forward end by means of a link F to one end of a lever F, fulcrumed to the lower part of the bed of the frame A, and the other end of said lever has connected with it a rod G, extending loosely through an eye or bearing H on the rack-bar S,the said rod G being provided with adjustable stops at each side of the eye or bearing H, whereby the said adjust-able stops alternately engage the said eye or bearing as the rack-bar S is moved backward or forward by the mechanism described, and thereby shifts the rod to auto matically reverse the machinery, so as to advance or withdraw the tool-carriage from. the Work, the extent of the travel of the tool-carriage between the periods of reversal being regulated by moving the adjustable stops to or from the eye or bearing H. The rod D is also connected by means of a link I with a hand-lever K, fulcrumed at its lower end to a pin L and extending up through a slot in the bed of the frame A, whereby the said rod D and the collar 13 may be shifted by hand to reverse the motion of the shaft or to stop the same, as hereinafter more particularly described.

The bearing-block is cut away at its top, and the portion of the shaft U located in the cut-away portion is formed with a wormserew U, which intermeshes with a threaded periphery of a worm-wheel M, mounted on a short transverse shaft N, journaled at P, depending from the lower side of the bed of the frame A. The said shaft has mounted upon a cogged pinion R, which intermeshes with a rack on the under side of a rack-bar S, which is provided with a spline T on its upper side, the said spline being arranged to slide in a groove in the lower side of a longitudinal rib U on the under side of the bed of the frame A. The forward end of said rackbar projects to the front of the frame A directly below the table E, before mentioned, and is recessed on opposite sides. From the bottom of the said table extends downwardly a bifurcated hanger V, the members of which embrace the recessed portion of the rack-bar, the said members being arranged to slide vertically in the recesses so far as to travel with the rack-bar and at the same time permit the table to be elevated or depressed at pleasure.

The frame V of the table at one side is provided with a rack X, with which intermeshes a cogged pinion Y, mounted on one end of a short shaft Y journaled in a bearingblock Z on one end of the ways B, between which the table travels. The other end of said shaft has secured to it a hub having a series of radial arms or levers A by means of which the table may be elevated or depressed. The said bearing-block has two forwardly-projecting jaws B having half-bearings, between which avertical rod 0 secured to a lateral bracket D projecting from the frame of the table, is arranged to slide. Through suitable threaded openings in the said jaws passes a clamping-screw E provided at its projecting end with alever F by means of which the jaws ma y be clamped upon the rod to hold the table in any vertically-adjusted position. The pulley M, before mentioned, is mounted on a pin G secured to one end of an arm H the other end of said arm being provided with a pin 1 extending in a direction opposite to that of the pin G and having a bearing in the end of a lateral bracket K extending from the side of the frame A. To the rear end of said pin is secured an arm L which has connected to its free end a cord or chain M passing over a pulley N and provided with a weight at its end, whereby the belt K may be kept con stantly at the proper tension. The belt also passes around the pulley M, mounted on a j ournal-pin secured to t-he bracket K to per- IIO mit it to move freely in elevating and depressing the table.

The letter L indicates a friction-band, which embraces the friction-wheel M", affixed to the shaft U at its rear end, the said friction-band being secured at one end to the journal-bearing by means of a pin N and connected at the other or free end by means of a link P with one end of the lever R ful crumed at T to the inside of the frame A. The other end of said lever connects, by means of a rod S with a shortlever T fulcrumed to the handle of the hand-lever K, whereby the friction-band may be caused to bind the friction-wheel M and suddenly arrest the motion of the friction-wheel and shaft.

The rear of the bed of the machine at each side is provided with ways U over which is mounted a longitudinally-movable table V which is provided with a hanger or bracket extending downwardly through an opening in the bed of the frame. The hanger is provided with an internally-threaded opening, through which passes a leading screw X journaled in suitable bearing-blocks R on the under side of the bed of the frame A. The said screw is provided with a beveled pinion Y at its forward end, which intermeshes with a similar pinion Z on one end of a short shaft A which is journaled in a bearing below the bed of the frame A and in the side of said frame through which it passes, the outer end being provided with a lever or wheel by which it may be turned to move the table V back and forth to regulate the depth to which the mortise is to be out.

The top of the table Y is provided with segmental ribs B upon the upper edges of which rests a table G which is swiveled to the table V by means of a central pivot or bolt, as shown and illustrated in Fig. 7 of drawings attached to specifications for Letters Patent No. 283,341, granted August ll, 1883, to R. S. Greenlee. The table C on the upper side is provided wit-h ways D between which is arranged to travel transversely to the bed of the frame A a movable carriage E to which the work to be mortised is secured. The under side of the carriage at one side is provided with a rack F, with which intermeshes a cogged pinion F sitting in a short slot in the table 0 and mounted on a short shaft G having a bearing in the side of the said table 0". The said shaft projects beyond the side of the table and has mounted loosely on its outer end a split collar H having upwardlyextending arms 1 which may be grasped and brought together so as to bring the collar upon the shaft, the whole constituting a grip or friction lever, by means of which the shaft maybe turned intermittently to move the traveling carriage the proper distance across the front of the cutting-tools to properly space the mortises.

In order to accurately and conveniently gage the distance between the mortises an arc plate K is secured to the boss of the bearing in which the shaft G is journaled. The said plate has a segmental slot, in which sits and is adapted to slide an adjustable stop L which is provided with a set-screw M by means of which it may be clamped in any adjusted position. The are plate is graduated on its periphery, as shown, so that by bringing the forward edge of the stop opposite any particular graduation mark and clamping it there the movement of the griplever will be limited by means of a stop or follower i, riveted or affixed to the inner side thereof, extending through the segmental slot and adjusted to slide therein, so that when the grip-lever is moved forward this stop or follower is brought in contact. with the adjustable stop L whereby the motion of the grip-lever is arrested, so as to accurately and properly space the mortises.

The carriage E is provided with a vertical standard-plate N which forms a backing for the work to be mortised. The said standard is slotted vertically, and in said slot is located a sliding block P operated by means of a leading-screw R having a hand-wheel R at its upper end to clamp the work to its seat on the traveling carriage, the forward end of the block being provided with a dog S which seizes and holds the work to the tools. The rear of the traveling carriage is provided with two standards T and the table C is provided with an intermediate standard D through which passes a gage-rod D", having adj ust'able stops D. By adj usting the said stops the travel of the carriage may be properly limited to regulate the length of the mortises to be cut.

The operation of our invention will be readily understood in connection with the above description, and is as follows: The work to be mortised is clamped to the carriage E by means of the clamping-block P and the table E is adjusted to the proper height. Upon starting the driving-shaft, the lever K, the collar 13*, and the pulley W being in the position shown in Figs. 1 and 4 of the drawings, the auger will be rotated in proper direction for boring and the carriage E will be advanced to the work, so as to cause the chisel to cut into the wood while the boring is being efiected. To elevate the table E, the shaft Y is turned by means of the arm A so as to rotate the pinion Y and operate the rack X. The table is held in an adjusted position by clamping the jaws B as hereinbefore mentioned. The carriage is traversed across the machine in front of the tool at intervals to properly space the mortises by means of the lever 1 and the distance between the spaces is regulated by means of the stop L being determined by adjusting the said stop to the graduations on the arc plate, as before described. The stop may be also adjusted so as to limit the movement of the lever in such manner as to merge the successive mortises and make one long mortise of any suitable length.

It will be observed that most. of the devices for cont-rolling the operation of the machine are Well to the front and right hand thereof, where they may be readily manipulated by the attendant of the machine.

Having thus fully described our invention, what We claim, and desire to secure by Letters Patent, is

1. The combination, with the main drivingshaft of a mortising-machine, of the pulleys thereon, and intermediate driving-shaft and the loose pulleys mounted thereon, a collar between the pulleys and mounted loosely to slide on said shaft, the pawl-levers fulcrumed to the loose pulleys, and clutch-band engaging the pulley Z and operated byrthe levers, and the mechanism for shifting the collar to engage or disengage the pawl-levers to stop or reverse the travel of the tool-carriage, substantially as specified. V

. 2. The combination,in a mortising-machine, of the intermediate driving-shaft, the loose pulleys and intermediate collar mounted thereon, the arms connecting with said collar, the reciprocating rod carrying the said arm, and the hand-lever connected with the said rod by means of a link, whereby the motion of the intermediate driving-shaft may be reversed to reverse the travel of the tool-carriage, substantially as specified.

3. The combination, in a mortising-machine, I

of the vertically-movable table arranged to slide between ways at the front of the main frame, the rack secured to the-frame of the table, the pinion intermeshing with the rack, levers by which it is operated, and the clampjaws and screw, whereby a sliding rod forming part of the table is clamped to hold the table in any desired vertically-adjusted position, substantially as specified.

4. The combination, in a mortising-machine, of the friction-band surrounding the frictionwheel, the intermediate driving-shaft, the connecting links and levers, and the short lever fulcrumed to the handle of the reversing hand-lever, whereby the motion of the machine may be instantly arrested, substantially as specified.

5. The combination, with the intermediate driving-shaft, its Worm-screw and pinion, of the rack-bar intermeshing therewith and having opposite vertical recesses atits forward end, and the bifurcated hanger depending from the tool carriage, whereby the said carriage is advanced and withdrawn while it is permitted to be moved vertically, substantially as specified.

6. The combination, in a mortising-machine, of the vertically-movable table carrying the tool-carriage, the rack-bar by which the same is moved, the intermediate shaft and gearing,

whereby the rack-bar is operated, the reversing-pulleys, their band-clutches and dogs or pawls, and the intermediate sleeve, levers, and rod extending through a loose bearing on the rack-bar, the said rod being provided with adjustable stops, whereby the travel of the carriage is reversed at any desired point, substantially as specified.

RALPH S. GREENLEE. ROBERT L. GREENLEE. Witnesses:

G. L. CHAPIN, CARLTON PROUTY.