US655421A

US655421A - Mitering-machine.

Info

Publication number: US655421A
Application number: US72957799A
Authority: US
Inventors: Joseph L Tyler
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-09-06
Filing date: 1899-09-06
Publication date: 1900-08-07
Anticipated expiration: 1917-08-07

Description

No. 555.421. Patented Aug. 7, moo.

. .1. L. TYLER.

M'ITERING MACHINE.

. (Application filed Sept. 6, 1899.)

(No Model.) 3 Sheets-Sheet 1..

WITNESSES: L VVENTOR. W 7. I z. J 6 m BY ATTORNEYJ 'IHE Nomus PETERS co. PHOTO-LYTHQ- wAsumc-rou. u. c.

No. 655,42l. Patented Aug. 7 I900. I

.1. L. TYLER.

MITERING MACHINE.

A nmidn filed Sept. 6, 1599. (No Model.) 3 Sheets8heet 3.

WITNESSES} IJ-VENTOR.

gin/1& f ,x. .7

ATTORNEYJ m: nonms PETERS ca. PHoTc-uma. WASHINGTON, a. c.

UNITED STATES PATENT FFlCe JOSEPH L. TYLER, or LYNN, MASSACHUSETTS;

MITERING-MACHINE.

srEorFIcA'rroN forming part of Letters Patent No. 655,421, dated August 7, 1900.

7 Application filed-September 6, 1899. Serial No. 729,577. (No model.)

To aZZ whom it may concern:

Be it known that I, JOSEPH L. TYLER, of

Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Mit ering-Ha-- chines for cutting and planing the ends of picture-frame moldings and other work, and has for its object toimprove the general construction and operation of such machines.

To this end the invention consists in, first, an improvement in the front gage whereby the latter may with facility be adjusted both longitudinally and angularly'; second,' an improvement in the guides for the cutterhead whereby said guides may be adjusted for wear; third, an improvement in the vertical adjustment of the cutter-head to compensate for the change in position of the cutting edges due to sharpening of the knives, and, fourth, an improvement in the driving mechanism whereby the clutch employed therein may be automatically held in operation during the upward or return stroke of the cutter.

Of the accompanying drawings, Figure 1 represents a rear elevation of a mitering-machine embodying my invention. Fig. 2 represents a plan" view thereof. Fig. 3 represents a side elevation. Fig. 4 represents a Section through the gage-clamp. Fig. 5represents a transverse section through the shafts, showing the automatic clutch oontrolling mechanism.

The same reference characters indicate like parts in all the figures.

Referring to the drawings, 1 designates the frame of the machine, which has a worksupporting table 2 at its upper end, and its lower end is provided with bearings for the drive-shaft 3 and for the crank-shaft 4. The drive-shaft 3 has a pinion 5, meshing with a gear 6 on the'crank-shaft,whereby the former shaft when rotated drives the latter.

8 represents the cutter-head, mounted to slide vertically in suitable guides 11 11 and having attached to it the V-shaped cutter, consisting of a knife or knives set at a right angle and having downwardly and outwardly inclined cutting edges which give a shearing out. The crank-shaft 4: is provided at its middle portion with a crank 7, connected by a pitman or connecting rod 9 with the cutter-head S, the revolution of the crank-shaft 4. imparting a vertical reciprocatory motion to the cutter-head 8.

The continued sharpening of the knives 1O composing the cutter reduces their width and tends to change the relative position of the cutting edges with relation to the cutterhead and work-table. It has been customary to adjust the knives downwardly on the cutter-head to compensate for this decrease, the cutter-head being provided with a row of two or-more holes for each of the attachingbolts which secure the knives to the head; but the principal objection to this method is that the bolt-holes cannot be spaced near enough together to give a small adjustment. I provide an improvement by making the connecting-rod 9 adjustable. Said .rod, as shown, consists of an upper part 19, connected to the cutter-head 8, and a lower part 20, connected to the crank 7. The two parts are held together by bolts 21 21, which pass through elongated slots 22 22 in the part 20 and screw into the part 19. This permits the length of the connecting-rod to be increased or decreased,and the connection when tightened is locked by means of the engagement of teeth 23 23, formed on the

respective parts

19 and 20. The locking-teeth 23 may be Spaced as closely as desired, so as to permit of any desired degree of adjustment.

The guides 11 11 for the cutter-head 8 are elongated vertically, and in horizontal section they have approximately a U shape, the ends of the U embracing tongues 24 24, formed on the sides of the cutter-head. This cross-sectional shape and the thickness of the metal in the guides 11 are such as to make said guides springy, permitting the ends of the U to be drawn together to a limited extent. The

distance between the ends of the U is regulated by means of bolts 25 25, passing transversely through the legs of the'U-guides. As the guiding portions of the cutter-head and guides wear away through continued use these bolts are tightened up to compensate for the wear, as will be readily understood.

12 represents a belt-pulley mounted loosely upon the drive-shatt 3 and movable longitu- IOL) dinally thereof and also formed with an internal conical surface adapted to be engaged by a eomplemental cone 13, secured to the shaft 3, the two

members

12 and 13 forming parts of a clutch of familiar construction. The two parts norm ally tend to become disengaged and are adapted to be pressed together into driving engagement by a beveled roller 14, mounted on the end of an-arm 15, secured to a rock-shaft 1 6. A treadle 17, normally elevated by a spring 18, is also secured to said rock-shaft, and by depressing the treadle the clutch memberswill be engaged and the shaft 3rotated. In order that the complete return of the cutter-head after a downward-cutting stroke may be insured, I have provided a device for automatically holding the clutch in operation during said return or upward stroke, said device consisting, as shown, of a cam 26, secured to the crank-shaft 4 and adapted to engage a roller 27, mounted at the, end of a short arm 28, which is secured to the treadle 17. The cam 26 is of a segmental form and engages the roll 27 only during the upward half of the revolution of the crank 7, and while the cam is in engagement with the roll the treadle cannot be elevated to release the clutch. The cam and roll operate in conjunction with a brake consisting of a drum 29, secured to the drive-shaft 3, and a friction-shoe 30, attached to the treadle 17 near its pivot-.16. When the treadle is in its elevated position, the brake-shoe 30 is in engagement with the drum 29, and the shafting is therefore held from rotation. It is, evident from the above that the operator has full control over the cutter-head during the descending stroke of the latter, and he can move said cutter as slowly as desired down toward the work by vibrating the treadle. to a small are and alternately engagingand disengaging the clutch but after the cuttingstroke has been made the cam 26 comes into action and prevents the release of the clutch, as stated, compelling the cutterhead to make its full return stroke. In other words, thecluteh-controllin g device.viz. ,the treadle and the parts operated therebyinelude means for varying the speed of movement of the cutter-head during-its downward movement, while the action of the cam 26 is to prevent the release of the clutch during the movement of the cutter-head in theother direction. This enables the operator to also stop the cutter at any point during itsdownward movement, so that if it is discovered j ustafter starting the downward movement of the cutter that the Work is not correctly placed such movement of the cutter can be stopped, or its movement may be. so slow as to enable the work to be properly positioned if it has slipped.

The table 2 isequipped with apair of front gages 32 32 for properly positioning the, work with; respect to the cutter, said gages being pivotally mounted upon independent gageblocks 31, which are .fitted to slide toward and from the. cutter in grooves 33 33, formed in the table 2. Each of the blocks 31 is formed with an upwardly-projecting stud 37, as seen in section in Fig. 4, through which passes a bolt 35, screwing at its lower end into a clamping-plate 36, located below the table 2, and the gage 32 is formed with a split collar 38, surrounding said stud and provided with a clamping-bolt 39. A washer 39' is interposed between the upper edge of the collar 38 and the head of the bolt 35. The clamping-plate 36 is further suspended from the block 31 by a loosely-adjusted suspending-bolt 40, which prevents the plate 36 from turning. \Vhen the block 31 is brought forward, it abuts against a shoulder 41, forming the end of the groove 33, and is automatically held in this position by a dog 42, hinged to the rear end of the block 31 and adapted to engage a notch atthe bottom of the groove 33. By loosening the bolt the gage 32 may be adjusted angularly about, itsv pivot. and then clamped by retightening the bolt, and longitudinal adjustment toward and from the cutter is in the same manner efiec-ted by loosening the bolt 35 andsliding the block 31 along its groove and then elampingit by re-. tightening the bolt 35. To get the proper angular adjustment for each of thegages 32, I provide the table 2 with segmental indexes 43 43, graduated in degrees and having their centers at the pivotal point of the gages32 when the blocks 31 are abutting the shoule ders 41. provided with a small index-finger 44, aflixed by a. set-screw 45. should be approximately on a line through the pivotal center of the gage parallel to the, front end of the. gage, but may be moved slightly with respect to the gage by manipulating the set-screw 45 so as to compensatefor any slight changes in the position of the. cutter.

On the sides of the table 2 are shown the inner ends of two extension-tables 47 47, mounted upon bases4949,which areadapted The end of each of the gages32 is;

Theend of this finger to slide along tracks or guides. 48 48, the 7 tables being pi votally secured to the bases.49..

2. In a machine of the. character specified,

a cutter-head, mechanism for reciprocating the same, driving mechanism, aelutch for connecting said mechanisms, aw clutch-controllingdevice including means. for varying the, speed of movement of the cutter-head in one direction, and a cam connected with thecutter-head-reciprocating mechanism for pres.

venting the release of the clutch during movement of the cutter-head in the other direction.

3. In a machine of the character specified, a cutter-head, a crank-shaft having a crank connected with and adapted to reciprocate said head, driving mechanism, a clutch adapted to connect said driving mechanism to said crank-shaft, a treadle controlling said clutch and carrying a roller and free to vary the speed of movement of the cutter-head in one direction, and a segmental cam'secured to said crank-shaft and arranged to engage said roll and hold the clutch in operation during the cutter-head-returning stroke of the crank.

4. In a machine of the character specified, a cutter-head, mechanism for reciprocating the same, driving mechanism, a clutch for connecting said mechanisms, a clutch-controlling device including means for varying the speed of movement of the cutter-head in one direction, a cam connected with the cutter-headreciprocating mechanism for preventing the release of the clutch during movement of the cutter-head in the other direction, and a brake operated by said clutch-controlling device, and adapted to restrain the reciprocating mechanism.

5. In a machine of the character specified, a cutter-head, mechanism for reciprocating the same, a drive-shaft carrying a drive-pulley, and a clutch adapted to connect said pulley to said shaft, a brake-drum secured to said drive-shaft, a treadle controlling said clutch and free to vary the speed of movement of the cutter-head in one direction and having a brake-shoe adapted to engage said drum and a roller, and a cam secured to said crankshaft and arranged to engage said roller and hold the clutch in operation during the cutter-head-returning stroke of the crank.

6. In a machine of the character specified, a cutter-head provided with a guiding-tongue, an elongated guide therefor flexible and substantially U-shaped in cross-section with the ends of the U embracing said tongue, and means for increasing and decreasing the distance between the ends of the U.

7. In a machine of the character specified, the cutter-head 8 having the guiding-

tongues

24, 24, the elongated guides 11, 11 flexible and substantially U-shaped in cross-section with the ends of the Us embracing said tongues, and the

bolts

25, 25 passing transversely through said guides and adapted to increase and decrease the distance between the ends of the Us.

8. In a machine of the character specified, a work-supporting table, a gage-block mounted to slide longitudinally thereon, and having an upwardly-projecting stud, a gage having a split collar surrounding said stud and a bolt adapted to clamp said collar to said stud, a clampingplate located below the table and a bolt passing through said stud and screwing into said plate.

9. In'a machine of the character specified, a work-supporting table having two parallel guideways, two independent gages each of which is adjustable along said guideways and each being pivotally adjustable, means for clamping said gages longitudinally and pivotally, abntments for determining the longitudinal movement of said gages in one direction to secure their being brought parallel with each other, and a segmental index on the table for each of said gages and adapted to cooperate therewith in determining the pivotal adjustment of each gage when positioned by its abutment.

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

JOSEPH L. TYLER.

Witnesses:

SYDNEY S. CHANDLER, WM. G. CHANDLER.