US485162A - Thelmes - Google Patents

Description

A. A. BARTHELMES.

(No Model.) 2 Sheets-Sheet 1..

PRASING MACHINE.

Patentd Nov. 1, 1892.

2 Sheets-Sheet 2.

A. A. BARTHELMES.

FRASING MAGHINE Patented Nov. 1, 1892.

UNITED STATES PATENT OFFICE.

ALEXANDER A. BARTI-IELMES, OF TORONTO, CANADA.

FRASING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 485,162, dated November 1, 1892.

Application filed December 24, 1891. Serial No. 416,095. (No model.)

To aZZ whom it may concern:

Be it known that I, ALEXANDER A. BAR- THELMES, manufacturer, of the cityof Toronto, county of York, Province of Ontario, Canada, have invented certain new and useful Improvements in Frasing-Machines; and I hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to a machine designed especially for use in the manufacture of pianoforte-actions; and the object of the invention is to so construct a machine that it will automatically and almost simultaneously frase both sides of the piece of work operated on, and by its use the Work can be accomplished more rapidly and cheaply than by any other known means now in use; and the invention consists, essentially, of the device hereinafter more fully set forth in the specification, and more particularly pointed out in the claims.

In the drawings, Figure 1 is a front elevation of my improved frasing-machine, showing the framework, the bed-plate, the cutter mechanism, a means for operating the cutting mechanism, and means for moving said cutting mechanism into engagement with the work, the vise, and mechanism for transmitting motion to the several parts. Fig. 2 is a sectional view of a portion of the bed-plate, the head-stock, the vise for holding the work while being operated on, the cutter mechanism, means for moving the cutter mechanism into engagement with the work, pulley mounted on the spindle of the on tter-head for transmitting motion to said spindle, the head-stock, the oam-driving spindle, cams mounted on said spindle for operating the movable jaw of said vise, and cutter-head-movin g mechanism. Fig. 3 is an alternative form of head-stock and cutter mechanism. Fig. 4 is an end elevation of the cutter mechanism illustrated in Fig. 3 and a section of the bed-plate. Fig. 5 is a sectional view of the friction-clutch, driving-pulley, and mechanism for operating the cutter-head-moving mechanism. Fig. 6 is a view of the releasing-cam for disengaging the clutch shown in Fig. 5 from the remaining parts on the spindle on which are mounted the cams to operate the outter-head-moving mechanism. Fig. 7 is a view of the bellcrank-lever for operating the movable jaw of the vise, the male portion of the frictionclutch, the locking-lever, cam, and spindle.

Like numerals of reference refer to like parts throughout the specification and drawlugs.

In'the drawings the framework of the machine consists of four standards 1 of any suit able size, supporting on their upper ends the bed-plate 2, which bed-plateis fitted with two V-shaped guide-rails 3, located at or near the front and rear edges and parallel therewith and with each other.

Mounted on the bed-plate 2 is a vise 4, consisting of a stationary jaw 5, provided with a base 6, having V-shaped grooves formed therein, into which enter the V-shaped rails 3, said base 6 being bolted or otherwise secured to the bed-plate 2 and a movable jaw 7 sliding on the top of the base 6. The base 6 of the stationary jaw 5 is hollow and pivoted in the hollow portion thereof and to the side pieces 8 is a lever 9, the upper end 9 of which enters a recess 10, formed in the under side of the body 11 of the movable jaw 7, the lower end 9 of said lever engaging with the cam 12, mounted at or near the middle of the shaft 13,

journaled in suitable bearings formed in the framework of the machine.

Mounted on the top of the bed-plate 2 and located on either side of the vise at is a headstock 14, and mounted in suitable bearings 14 at the top of the standards 14 of said head-stock is a spindle 15, so arranged as to revolve freely in said bearings and move longitudinally through them when it is desired to bring the cutters into engagement with the material in the vise 4.

Mounted on that end of the spindle 15 adjacent to the vise-:t is a cutter-head 16, which revolves with said spindle, while in the opposite end of said spindle is a recess 17, into which enters a pin 18, passing through the upper end of the lever 19, pivoted at or near its middle to some convenient part of the framework of the machine, the lower end of said lever engaging with the cam 20, mounted at or near the end of the shaft 13. Rigidly mounted on the spindle 15 between the bearings 14 is a coned pulley 21, having only one hub 22, which projects inwardly into the body thereof, so that the open side of said pulley will pass over the bearings 14 when 7 moved longitudinally by means of the lever 19.

Encircling the spindle and butting on end 9 of the lever 9 the instant the shaft 13 commences its revolution. The engagement of the raised face of the cam 12 with the lower end 9 of the lever 9 causes said lever to alter its inclination-that is, it moves outward the lower end 9 and consequently moves inward the upper end 9. The movable jaw 7 is carried toward the stationary jaw 5 by means of the movement of the upper end 9 of the lever 9, and is there held with sufficient force to firmly grip the mate-.

rial or work which may be placed between it and the stationary jaw 5 until it is carried away from the stationary jaw 5 by the reverse movement of the lever 9. The raised face of the cam 20, engaging with the lower end of the lever 19, causes said lever to alter its inclinationthat is, the raised face of the said cam moves outward the lower end of. said lever and consequently moves inward the upper end. As the said lever has rigidly fixed to its upper end a pin 18, which engages with the spindle 15, it moves forward said spindle and holds it in that position during the travel of the lower end of the lever on said cam. The pin 18 is screw-threaded, and fitted to its outer end is a thumb-nut 18 so that said pin can be adjusted to move the spindle 15 forward any desired distance. The forward movement of the spindle 15 moves the cutterhead 16 to the work held in the vise 4; and

keeps said cutter-head in engagement with said work until the result desired has been accomplished.

It might here be stated that the cutterheads 16 are located equidistant from the middle of the vise 4 when the jaws are in their closed position and that the cams operating the levers 19 are so arranged as to bring the cutter-heads 16 alternately into engagement with the work in the vise 4. Each of the cutter-heads 16, it will be noticed, is fitted with a cutter-knife 16 and a drill 16 so that a circular recess will be out out of each side of the material and an aperture will be made therethrough simultaneously with the cutting of the circular recess. The points of the drills 16 are in alignment and each cutter-knife 16 is secured to the cutter-head 16 in such a manner as to do its cutting from the same center and with the same radius.

After the head-stock 14: has been properly placed in position it is, as shown in Fig. 20f the drawings, bolted or otherwise secured to the framework of the machine, so that under no circumstances can it alter its position, and,

as shown in Figs. 3 and 4:, the head-stock let is movable along the bed-plate.

It might here be stated that while the headstocks 14: are securely and immovably fixed to the bed-plate 2 each of the cutter-heads 16 is moved toward the work held in the vise 4 by the action of the cams 20 on the lower ends of the levers 19.

The coned pulley 21 is rigidly mounted on the spindle 15 and revolves therewith and is constructed with only one hub 22, located at or near the rear side face, thus "leaving the front side face of the pulley open, sothat in the forward movement of the spindle 15 the front bearing-box 14;. will enter the recess in said pulley through said front open side. On one end of the shaft 13 is a loose pulley 26, fitted on its inner side face with one section 27 of a friction-clutch, and mounted on the shaft 13, on the inner side of the loose pulley 26, is the remaining section 28 of said friction-clutch, the collar 29 of which is fitted with a groove into which enters a spline 30, secured to the periphery of said shaft 13. From this construction it will readily be seen that while the section 28 of the friction-clutch is permitted to freely move longitudinallyon the shaft 13 it is compelled to always revolve therewith, while the section 28 in engagement with the section 27 of said friction-clutch secured to the side face of the loose pulley 26 must as a natural consequence revolve with said pulley 26 and transmit to the shaft 13 a rotary motion, which shaft transmits to the cams 12 and 19 the same movement. Connecting the lower end of the standards 1 of the frame of the machine is a stay 31, and pivoted on the stay 31 is a treadle 32. Pivoted to the bed-plate 2 is a bell-crank lever 33, and connected to the end of the horizontal arm 33 is the upper end of a connecting-rod 34:, while the lower end of said connectingrod is secured to the treadle 32 between the pivot and its front end. Connected to the lower end of the vertical arm 33 of the bellcrank lever 33 is one end of the connectingrod 35, while the opposite end of said connecting-rod is connected to the outer end of a forked lever 36, encircling the shaft 13 adjacent to the outer side face of the collar 29. By pressing downwardly on the front end of the treadle 32 the connecting-rod 34 is drawn downward, and in its downward movement draws down with it the horizontal arm 33 of the bell-crank lever 33, throwing the vertical arm 33 of said bell-crank lever outward, drawing in the same direction the outer end of the forked lever 36, moving the forks against the outer side face of the collar 29 of the section 28 of the friction-clutch, thus throwing said section into engagement with the section 27, secured to the side face of the loose pulley 26.

Extending outwardly from the standard 1 of the frame of the machine is a lug 37, and pivoted to this lug is one end of a dog 38,and secured to the upper end 38 of said dog is IIO one end of a spring 39, while the opposite end of said spring is secured to the frame of the machine. The upper end 38 of the dog 38 is provided with an arm which extends over the collar 29 and is so located that when said collar is moved forward by the action of the forked lever 36 it drops into engagement with the side face of said collar and holds the section 28 of said friction-clutch in engagement with the section 27, said dog continuing to remain in engagement with the side face of said "cellar until moved outwardly by the action of the cam 40, rigidly mounted on the shaft 13, at which period the section 28 of the frictionclutch is permitted to become disengaged from the section 27, the loose pulley 26 continuing to revolve and the shaft 13 becoming stationary. Projecting outwardly from the standard 1 is a stub 41, on which is mounted a pulley 42, over which and the pulley 26 passes a belt 43, transmitting motion from the pulley 42 to the pulley26. Mounted on the stud 41 on the inner side of the pulley 42 is a second pulley 44, and mounted on the end of the counter-shaft 45 is a pulley 46, and passing over the pulleys 46 and 44 is abelt 47, transmitting motion and power from the shaft 45 to the pulley 44, which in turn transmits motion and power to the pulley 42, which transmits it in turn to the pulley 26.

Mounted on the counter-shaft 45 vertically below the coned pulley 21 are coned pulleys 48, and passing over the coned pulleys 21 and 48 is a belt 49, to transmit power to the coned pulley 21 from 48. Mounted on the countershaft 45 is a drive-pulley 50, which supplies power to the machine.

It will be readily understood that while the cutter-heads are running at a high rate of speed, the cam 12 and 19 on the shaft 13 are running at a low rate of speed, so that the cutter-heads will have sufficient time to properly finish their work before the cams disengage them and loosen the jaws of the vise.

In Figs. 3 and 4 I have shown an alternative means of moving the cutter-heads 16 to the work held in the visethat is, in place of moving the spindle 15, as in the first instance, I make the head-stock movable and connect it to the top end of the lever 19, thus moving the head-stock, whereas in the former instance the spindle is moved.

Having thus fully described my invention, what I claim as new,and desire to secure by Letters Patent, is-- 1. In a frasing-machine, the combination of a bed-plate, a vise mounted upon said bedplate, said vise comprising a stationary jaw and a movable jaw, a lever pivoted to the framework of the machine and engaging with the movable jaw, a counter-shaft, a cam mounted upon the countershaft and engaging with said lever, said cam and lever arranged to move the movable jaw toward the stationary jaw to engage with the work in the vise, cutting-tools, spindles upon which the cutting-tools are mounted, means for rotating said spindles and cutting-tools, alever connected to said spindles, said lever pivotally connected to the framework of the ma chine, a cam mounted upon a counter-shaft, engaging with the second lever, said second lever and cam adapted to move the spindle and cutting-tool toward the work in the vise, means for moving the spindle, and cuttingtool back again, a main shaft, a power transmission between said main shaft and said counter-shaft, and a dog pivotallyconnected to the framework of the machine, said dog engaging with the cam on the counter-shaft, said dog and cam adapted to throw the said counter-shaft into and out of engagement with the driving-power, substantially as described.

2. In a frasing-machine, the combination of a bed-plate, a work-rest mounted thereon, said work-rest consisting of a stationaryjaw, a movable jaw, cutter-heads adapted to be moved longitudinally into engagement with the work in the rest and out again, mechanism for moving said cutter-heads, mechanism for transmitting to said cutter-heads a rotary motion, a countershaft journaled in the framework of the machine,a cam mounted on said counter-shaft, apivoted lever, one end of which engages with said cam and the other end with said movable jaw, a second cam mounted on said counter-shaft, a second pivoted lever, one end of which engages with said cam and the other end with said cutterhead, the engagement of said second lever with said second cam and cutter-head moving said cutter-head longitudinally into engagement with the work in the rest, a frictionclutch mounted on said counter-shaft, a shaft on which is mounted pulleys for transmitting a rotary motion to the said cutter-heads, a spindle intermediate between the said shaft and said countershaft, reduction-pulleys mounted on said shaft and on said spindle, motion transmitted to said spindle from said shaft, reductionpulleys mounted on said counter-shaft and on said spindle, and a dog and cam to throw said counter-shaft into and out of engagement, substantially as described.

3. In a frasing-machine, the combination of a suitable bed-plate, a work-rest mounted thereon, consisting of a stationary jaw and a movable jaw, cutter-heads adapted to move longitudinally into engagement with the work in the rest, mechanism for transmitting to said cutter-heads a rotary motion, a spindle mounted in suitable bearings in the framework of the machine, a cam mounted on said spindle, a pivoted lever one end of which engages with said cam and the other end with said movable jaw, 21. second cam mounted on said spindle, and a second pivoted lever one end of which engages with said cam and the other with said cutterhead, the engagement of said levers with said cam and cutter-head moving said cutter-head longitudinally into engagement with the work in the rest, a friction-clutch mounted on said spindle, a counter-shaft on which is mounted the pulleys for transmitting a rotary motion to said cutterheads, a spindle intermediate between said counter-shaft and first-mentioned spindle, reduction-pulleys mounted on said countershaft and on said second-mentioned spindle, motion transmitted to said second spindle from said counter-shaft, reduction -pulleys mounted on said first and second spindles, and

10 mechanism mounted on said first-mentioned spindle for permitting the disengagement of the said friction-clutches when said spindle has completed its revolution, substantially as described.

Toronto, December .14, 1891.

ALEXANDER .A. BARTHELMES.

In presence of- CHAS. H. RIOHES, J. N. E. ANGELL.

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