US1074598A

US1074598A - Lock-mortising machine.

Info

Publication number: US1074598A
Application number: US71131012A
Authority: US
Inventors: Ivan H Bradley
Original assignee: BURNS AND BASSICK Co
Current assignee: BURNS AND BASSICK Co
Priority date: 1912-07-24
Filing date: 1912-07-24
Publication date: 1913-10-07
Anticipated expiration: 1930-10-07

Description

I. H. BRADLEY.

LOOK MORTISING MACHINE.

APPLICATION FILED JULY24,1912.

Patented Oct. 7, 1913.

E O n- 924 5/556? 8 6 0 a 6 Am 6 X I ATT ORNEY COLUMBIA PLANOGRAPH co., WASHINGTON. 04 c.

TED STATES PATENT orrion.

ivAN BRADLEY, or BRIDGEPORT, CONNECTICUT, AssIGNort TO THE BURNS AND BAs'sIoK COMPANY, or BRIDGEPORT, CONNECTICUT, A coaronnrron or coN- NECTICUT.

7 Specification of Letters Patent.

Patented Oct. Z1913.

Application filed July 2 1912. Serial No. 711,310.

To all whom it may concern:

Be it known that I, IVAN H. BRADLEY, a citizen of the United States, residing at Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Lock-Mortising Machines, of which the following is a specification.

This invention has for its general object to produce a strong and durable machine of light Weight and having a minimum number of parts for cutting a recess in a piece of wood and a hole intersecting the recess at a right angle, an especial object being to produce a simple and efficient machine for cutting lock mortises and key holes 1n drawer fronts, cabinet doors, etc.

With these and other objects in view the invention consists in certain constructions and in certain parts, improvements and combinations which will be hereinafter described and then specifically pointed out in the claims hereunto appended.

In the accompanying drawing forming a part of this specification, Figure 1 is a perspective view of the rear of the machine, the left end as seen from the front appearing in the drawing; Fig. 2 an elevation of the front of the machine, showing in dotted lines the position of the work under ordinary conditions and also the position of a curved piece of work, as,- a curved drawer front; Fig. 3 a detail'view partly in section, illustrating means for clamping the part being operated upon; Fig. 4 a detail view of one of the stops detached; Fig. 5 a detail view of the driving disk and link, and Fig. 6 is a perspective view of a part operated upon showing a mortise and key hole therein as cut by my novel machine.

10 denotes the bed, 11 a wall extending vertically therefrom and having a central opening 12, 13 a table at the top of the vertical wall, 14: a bracket extending from the front of the bed and provided with a boss 15 having a hole through it, 16 a stud. passing through the hole and locked in position by set screw 17, 18 a pin projecting through the stud near its upper end, and 19 angle brackets shown as adjustably secured to the rear of the vertical wall by screws 20 passing through slots 21, the horizontal arms of the brackets extending forward over the top of the wall. The work or part to be operated upon is indicated by 22, a mortise by 23 and a key hole by 24-. The work is retained in position by being clamped between angle brackets 19 and a plate 25 having a socket 26 to receive the upper end of the stud. This clamping plate rests upon a face cam 27 rotatably mounted upon the stud and engaging pin 18 and provided wit-h a handle 28 for convenience in operation. The rear edge of the clamping plate sets away from the vertical wall, leaving a space between them, but is provided with projections 29 which engage the vertical wall and prevent the plate from turning.

Rotation of the cam in one direction through engagement with the pin raises the plate to clamp the work and retain it in place, reverse movement releasing the work, as will be clearly understood from Figs. 2 and 3.

The mechanism for making mortises is carried by the bed and comprises a slide 30 which reciprocates longitudinally of the bed in ways 31 and a slide 32 which rcciprocates transversely to slide 30 in ways 83 upon slide 30. A spindle 34 journaled in bear ings 35 upon slide 32 carries a chuck 36 which is adapted to receive an end and side cutting tool 37 by which the mortise is formed. The spindle is driven by means of a belt 38 passing over a pulley 39 on the spindle. Slide 32 carrying the spindle is manipulated by means of a lever 40 pivoted as at 4:1 to a bracket secured. to the vertical wall and connected to the slide by means of a link 42. A pull upon the lever acts to move slide 32 and the tool into operative po' sition, from which position they are returned by a spring 43, one end of which is connected to the slide and the otherto one of the ways 33', the return movement being stopped by engagement of the lever with the front of the vertical wall. The forward movement of the slide is limitedby the engagement of an adjustable plate 44 on the slidewith a stop pin a5 projecting from one of the ways. The plate is shown as locked in place after adjustment by means of a screw passing through a slot and engaging the slide. lteciprocatory movement is imparted to slide 30 by means ofa link 16, one end of which is pivoted to the'slide and the other to a stud 47 which is adjustably secured in a T-slrape'd slot in the face of a driving disk 48 carried by a shaft 49 j ournaled in a bear 50 upon the bed; The shaft and disk are 1 driven by means of ahelt 51 passing over a pulley 52 upon the shaft, rotation of the disk causing the link to reciprocate slide-3O and the parts carried thereby.

The mechanism for making key holes is carried by table 13 and comprises a slide 53 mounted longitudinally of the bed in ways 54, a slide 55 which reciprocates transversely to slide 53 in ways 56 upon slide 53 and a slide 57 which reciprocates vertically in ways 58 upon an upright 59 forming part of slide 55. A spindle 6O journaled in bear ings 61 upon slide 57 carries a chuck 62 which is adapted to receive an end and side cutting tool 63 by which the key hole is cut.

The spindle is driven by means of a belt 64 passing over a belt pulley 65 on the spindle and partly about idler pulleys 66 journaled upon a bracket 67 secured to the vertical wall. Spindle 60 is placed in correct aline-' ment with mortising tool spindle 34 by adjusting slide 53 in ways 54 and locking by means of set screws 68 carried by brackets 69 and engaging the ends of the slide. Slide 57 carrying the key hole cutting spindle is manipulated by means of a handle 70 secured to the top of the slide. A downward push upon the handle acts to move the slide and'tool int-o operative position, in which position they are reciprocated transversely of the bed by pulling and pushing slide 55 in ways 56. The reciprocatory movement of slide 55 is limited by the engagement of a plate 71 carried by the slide, with stop screws 72 carried by the arms of a bracket 73 secured to ways 56 (see Fig. 4 in connection with Fig. 2).

When the handle 70 is released from the downward pressure, slide 57 and the tool are returned to its normal position by a.

spring 74 (see Fig. 2) one end of which is connected to a pin 75 in the slide which projects through a slot in upright 59, and the other end to a pin near the top of the upright, movement in either direction being limited by engagement of pin 75 with the ends of the slot.

To counteract the horizontal pull of belt 64, on spindle 60, and prevent slide 57 from binding in the ways, I provide a relatively stifi' spring 76, one end of which is connected to the slide and the other to a hook 77 located in the side of the upright.

The part to be operated upon is positioned with relation to the cutting tools by means of a gage consisting of a rod 78 extending from vertical wall 11 and a stop 79 adjustably secured thereon by a set screw 80.

The operation is as follows: The part to be operated upon which for convenience I will term the work, is placed over clamping plate 25 and under the horizontal arms of brackets 19, the cam being of course turned backward to permit the clamping plate to drop down. The stop is then so adjusted upon the rod that when the end of the work is placed against it and the inner edge against the vertical wall, the predetermined positions for the mortise and key hole will be in alinementwith the cutting tools. The i cam is then turned forward, which raises the clamping plate and grips the work between said plate and the arms of thebrackets, as will be clearly understood from the drawing. Should it be required to operate upon so-called swell fronts for drawers, the brackets are raised, as indicated by dotted lines in Fig. 2. It is immaterial whether the mortise or key holeis cut first. If the key hole is cut first, it provides a certain amount of clearance for chips in cutting the pressure upon the handle, spring 74 will re turn vertical slide 57 to it normal position. Should it be required to cut a key hole of unusual width, or longitudinal to the mortise, set screws 68 are loosened more or less to permit reciprocation of slide 53 in a di rection longitudinalto the clamping plate and transverse to the key hole as shown in Fig. 6. The cutting of a wider key hole would simply require a second reciprocation of slide 55. The operator would move slide 53 to one extreme of its movement as determined by set screws '68, reciprocate slide 55 and the cutting tool, then move slide 53 to the other extreme of its movement and then reciprocate slide 55 again.

The cutting of the mortise is caused by movement of lever 40. When this lever is pulled forward the mortising tool will pass through opening 12 inthe vertical walland into the work until stopped by engagement of plate 44 on slide 32 with stop pin 45. When the lever is released spring 43 will withdraw the cutter from the work. It will be noted that simultaneously with'the forward movement of slide 32 and the mortise cutting tool just described, slide 32 and its ways will have a transverse reciprocatory movement through the reciprocation of slide 30 in ways 31 longitudinally of the bed. This movement is produced by means of link 46 and driving disk48, and deter mines the length of the mortise. To make the mortise longer or shorter, stud 47 is adjusted outward or inward in the groove in the face of the driving disk. It will thus be seen that the cutting of a mortise-and key hole, the work having been adjusted in place,

requires only the manipulation of handle 7 O and lever 40 by the operator, the boring and side cutting being performed simultaneously.

Having thus described my invention I claim: 7

1. An improvement in lock mortising machines comprising abed provided with a vertical wall having an opening therein, a table extending forwardly from the upper edge of said wall and provided with an opening, cutting mechanisms supported by saidbed and said table respectively and projecting through the openings therein, and means for supporting the work in front of said opening in the wall and beneath said table.

2. An improvement in lock mortising machines comprising a bed provided with a vertical wall having an opening therein, a table extending forwardly from the upper edge of said wall and provided with an opening, cutting mechanisms supported by said bed and said table respectively and proj ecting through the openings therein, a supporting plate adjust-ably supported beneath said1 table and in front of the opening in the wal 3. An improvement in look mortising machines comprising a bed having a vertical wall provided with an opening therein, a table extending forwardly from the upper edge of said wall and provided with an opening, a bracket extending forwardly from said bed beneath said table, a work supporting plate carried by said bracket, and cutting mechanisms supported by said bed and said table respectively, and projecting through the openings therein.

4. 'An improvement in lock mortising machines comprising a bed having a vertical wall provided with an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening, a bracket extending forwardly from said bed beneath said table, a work supporting plate carried by said bracket, a cam plate for raising and lowering said supporting plate, and cutting mechanisms supported by said bed and said table respectively, and projecting through the openings therein.

.5. An improvement in look mortising machines comprising a bed provided with a vertical wall having an opening therein, a table extending forwardly from the upper edge of said wall and provided with an opening, cutting mechanisms supported by.

said bed and said table respectively, and projecting through the openings therein, a

supporting plate mounted beneath said table, and a cam plate for raising and lowering said supporting plate. 7

6. An improvement in lock mortising machines comprising a bed provided with a vertical wall having an opening therein, a table extending forwardly from the upper edge of said wall and provided with an opening, cutting mechanisms supported by said bed and said table respectively, and projecting through the openings therein, a supporting plate mounted beneath said table, and brackets secured to said vertical wall and cooperating with said supporting plate to clamp the work in place.

7 An improvement in look mortising machines comprising a bed provided with a vertical wall having an opening therein, a table extending forwardly from the upper edge of said wall and provided with an opening, cutting mechanisms supported by said bed and said table respectively and projecting through the openings therein, a supporting plate mounted beneath said table, brackets cooperating with said supporting plate to clamp the work, and means whereby said brackets may be adjusted with relation to said supporting plate.

8. An improvement in lock mortising machines comprising a bed provided with a vertical wall having an opening therein, a table extending forwardly from the upper edge of said wall and provided with an opening, cutting mechanisms supported by said bed and said table respectively, and projecting through the openings therein, a supporting plate adjustably mounted beneath said table, and brackets adjustably secured to said vertical wall and cooperating with said table to clamp the work.

9. An improvement in lock mortising machines comprising a bed provided with a vertical wall having an opening therein, a table extending forwardly from the upper edge of said wall and provided with an opening, cutting mechanisms supported by said bed and said table respectively and projecting through the openings therein, a

supporting plate mounted beneath said table, and brackets secured to said vertical wall and having overhanging arms cooperating with said table to clamp the work.

In testimony whereof I aflix my signature in presence of two witnesses.

' IVAN H. BRADLEY.

Witnesses:

S. W. ATHnRToN, E. M. GULVER.

Copies of this patentmay be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G.