US769497A

US769497A - Band-saw.

Info

Publication number: US769497A
Authority: US
Inventors: Charles Seymour
Original assignee: DEFIANCE MACHINE WORKS
Current assignee: DEFIANCE MACHINE WORKS
Priority date: 1904-01-30
Filing date: 1904-01-30
Publication date: 1904-09-06
Anticipated expiration: 1921-09-06

Description

PATENTED SEPT. 6, 1904.

C. SEYMOUR.

BAND SAW.

APPLICATION FILED JAN. 30, 1904.

NO MODEL.

W TNESSES.

No. 769,497. PATENTED SEPT. 6, 1904. 0. SEYMOUR.

BAND SAW.

APPLICATION FILED JAN. 30, 1904. N0 MODEL. 6 SHEETS-SHEET 2.

\ INVENTOI? Czar/5 Seymour PATENTED SEPT. 6, 1904.

C. SEYMOUR.

BAND SAW.

APPLICATION FILED JAN. 30, 1904.

6 SHEBTSSHBET 3.

N0 MODEL.

WITNESSE C/zarlzs Sgmwur PATENTED' SEPT. 6, 1904.

C. SEYMOUR.

BAND SAW.

APPLICATION FILED JAN. 30, 1904.

6 SHEETS-SHEET 4.

NO MODEL.

A TTOH PATENTED SEPT. 6, 1904.

C. SEYMOUR.

BAND SAW.

APPLICATION FILED JAN. 30, 1904.

6 SHEETS-SHEET 5.

N0 MODEL.

w ll? HHHI W! TNESSES:

N0 MODEL.

PATENTED SEPT. 6, 1904. O. SEYMOUR. BAND SAW.

APPLICATION FILED JAN. 30, 1904.-

- 6 BHEETS-BHEET 6.

WITNESSES:

INVENTOH Charles ,d gmour ATTORNEYS UNITED STATES Patented September 6, 1904.

PATENT OFFICE.

CHARLES SEYMOUR, OF DEFIANOE, OHIO, ASSIGYOR TO THE DEFIANCE MACHINE \YORKS, OF DEFIANOE, OHIO.

BAN D-SAW.

SPECIFICATION forming part of Letters Patent No. 769,497, dated. September 6, 1904.

Application filed u'anuary 30, 1904. Serial No. 191.272. (N0 model.)

To 11/! whom it Duty cancer/t.-

Be it known that 1, CHARLES SEYMOUR. a citizen of the United States, and a resident of Defiance, in the county of Defiance and State of Ohio, have invented a new and Improved Band-Saw, of which the following is a full,

clear, and exact description.

The invention relates to woodworking machinery; and its object is to provide a new and improved band-saw arranged to permit convenient and accurate adjustment of the feedtable for making straight and beveled cuts, to allow the feed mechanism to automatically accommodate itself to inequalities in the work, to insure proper guiding of the work past the saw-band, and to take up any slack in the endless saw-band,and to allow the latter to slightly yield under heavy strain, and to permit the operator to stop the feed almost instantly whenever it is desired to do so.

The invention consists of novel features and parts and combinations of the same. as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figures 1 and 2 are perspective views of the improvement. Fig. 3 is a side elevation of the same. Fig. k is a rear end elevation of the same. Fig. 5 is an enlarged sectional plan view of the clutch mechanism for connecting and disconnecting the feed with and from the clutch-driving shaft. Fig. 6 is an enlarged cross-section of the adjusting mechanism for raising and lowering the feed and the means for allowing the feed to automatically adapt itself to inequalities in the work. Fig. 7 is a sectional side elevation of the same on the line 7 T in Fig. 6. Fig. 8 is an enlarged rear sectional elevationof the mechanism for adjusting and locking the work-table. Fig. 9 is an enlarged cross-section of the mechanism for adjusting one of the band-saw wheels for taking up the slack in the saw-band and for allowing convenient removal of the saw-band whenever it is desired to do so. Fig. 10 is a sectional front elevation of the cam device for 5 the clutch-shifting mechanism, and Figs. 11 and 19. are cross-sectional views of the front and rear feed-rollers in position on the work.

The endless saw band or blade A extends over band-wheels B B, and the dmvnwardly traveling and cutting run of the saw-band A passes through a slot C in the work-table C, over which passes the work to be sawed, one edge of the work being guided along gagerollers D and the bottom of the work travelingover the usual rollers l) 1) D of which the rollers D D are journaled on the under side of the table O and project through slots therein to the face of the table in the front and rear of the sawband A, and the said gagerollers D and the guide-roller l) are journaled on'a frame D, held longitudinally adjustable on a guideivay D*, secured to the under side of the table O and extending along the front thereof, as plainly shown in Figs. 7

1, 2, and 3.

The lower band-wheel B has its shaft B journaled in suitable bearings 13, secured to the main frame E, and on the said shaft B are secured fast and loose pulleys B, conient reach of the operator to enable the latter 5 to shift the belt from the fast pulley to the loose pulley and vice versa as occasion may require.

The devices and mechanisms so far described are of the ordinary construction usually found in machines of this class, and further detailed description of the same is not deemed necessary.

The upper band-wheel B is journaled on a stud B", projecting from a bearing B", mounted to slide vertically in guideways E, arranged on the main frame E. The bearing 15 is pivotally connected at its lower end by The belt for the 80 a link G with a lever G, made of spring metal to be sufficiently flexible for the pur- 1 pose hereinafter more fully described, and the said lever G is fulcrumed at one end at G on the main frame E, and the free end of the said lever is pivotally connected with a rack-bar G mounted to slide in a bearing G, fulcrumed at its lower end at G on the main frame E. A pinion G (see Fig. 9) is in mesh with the rack-bar G and is mounted to turn in suitable bearings arranged on the rack-bar bearing G so that when the pinion is turned an up or down sliding motion is given to the rack-bar G so as to swing the lever G either upward or downward to push the bearing B up or down in its guideway E by the link G, connecting the lever G with the bearing B. When the bearing B is pushed upward and with it the wheel B, then any slack in the saw-band A is taken up, and when it is desired to remove the saw-band from the wheels B and B then the bearing B and with it the wheel B is lowered to allow convenient removal of the saw-band from the said wheels B and B. In order to turn the pinion G in the desired direction, the hub G thereof is provided with a suitable hand-wheel G extending to the front of the machine and under the control of the operator.

In order to securely lock the adjusting device in position after the desired adjustment is made, clamping-plates H and H are provided adapted to engage opposite sides of the rack-bar bearing G, as plainly indicated in Figs. 2 and 9. The clamping-plate H is secured on one end of a screw-rod H extending loosely and centrally through the pinion G and its hub G, and on the forward threaded end of the said screw-rod H screws a hand-nut H under the control of the operator and abutting against the forward end of the hub G. The plate H is provided with pins H slidably engaging the rear end of the pinion G to cause the said plate to turn with the pinion. The clamping-plate H is secured on the pinion G, and when the operator screws up the nut H then the clampingplates H and H move in firm contact with opposite sides of the rack-bar bearing G*, so as to securely hold the pinion G against turning, thereby preventing the accidental upand-down movement of the rack-bar G after the bearing B is adjusted as previously explained. WV hen it is desired to actuate the adjusting device as described, it is necessary to first unscrew the nut H so as to release the clamping-plates H and H from the rackbar bearing G to allow turning of the pinion G for the purpose above mentioned.

When the machine is running and the cutting edge of the saw band or blade A strikes a knot or other hard matter in the work and i an undue strain is thus brought on the active run of the saw-band in a downward direction, then the lever G, owing to its resiliency,

yields sufficiently to relieve the saw-band of the undue strain, thus preventing breaking of the saw-band or injury to connected parts. It is understood that when the machine is running the lever G is held against movemnt at both ends, and it is evident that the lever by its resiliency yields sufliciently for the purpose described. In practice the yielding motion of the lever G for relieving the saw band or blade A is exceedingly little, the maximum movement being about one-tenth of an inch, and to insure a very quick action of the lever G the latter is made rectangular in cross-section and set on edge, as indicated in the drawings.

The feed mechanism for feeding the work transversely over the table C is arranged as follows: Front and rear feed-rollers I and I are arranged in the front and rear of the cutting run of the saw-band A, as plainly shown in the drawings, and shafts J and J, carrying the feed-rollers I and I, are journaled in suitable bearings held on the lower end of a head K, mounted to slide up and down in suitable bearings E arranged on the main frame E. The feed-rollers I and I are driven from the main shaft B and the driving mechanism for the feed-rollers contains a friction-clutch under the control of the operator to enable the latter to stop and start the feed-rollers at any time. For the purpose described the shaft J for the feed-roller I is provided with a gearwheel J in mesh with an intermediate gearwheel Jijournaled on the lower end of the head K, and in mesh with a gear-wheel J secured on the shaft J for the front feed-roller 1. Thus when the shaft J is rotated the feed-rollers l and 1 rotate in unison. On the shaft J (see Figs. 2 and 4) is secured a bevel gear-wheel J in mesh with a bevel-pinion J secured on one end of a shaft J, carrying a bevel gear-wheel J mounted to turn with and to slide on the shaft J 7 and in mesh with a pinion J secured on one end of a clutch-shaft L, journaled in suitable bearings carried by a bracket E, attached to the main frame E, as plainly indicated in Figs. 4 and 5. The hub L of a clutchwheel L is mounted to slide on and to turn with the clutch-shaft L, (see Fig. 5,) and this clutch-wheel L is adapted to be moved in frictional contact with a bevel-gear clutchwheel L in mesh with a pinion L, secured on a transverse shaft L journaled in suitable bearings arranged on the bracket E On the shaft L is secured a pulley L, connected by a belt L (see Figs. 2, 3, and 4:) with a pulley L fastened on a counter-shaft L carrying a pulley L connected by a belt L with a pulley L secured on the main shaft B so that when the latter is rotated a rotary motion is transmitted by the pulley L belt L and pulley L to the counter-shaft L, which by, the pulley L belt L, and pulley L rotates.

the shaft L The latter by the bevel-pinion L* rotates the bevel clutch-wheel L and when the clutch If is moved in frictional contact with the said clutch-wheel L then the clutchwheel L is rotated and with it the shaft L, which by the gear-wheels J 9 and J shaft J and gearrwheels J and J rotates the shaft J for turning both feed-wheels I and I in unison in the proper direction to feed the work transversely over the table O. The clutch-wheel L is mounted to turn loosely on a stud E, extending loosely into the hub L of the clutchwheel L the said stud projecting from a bearing on the shaft If, as plainly indicated in Fig. 5. The shaft J is journaled at one end in a bearing held on the bearing for the shaft J, and the other end of the said shaft J is journaled in a bearing E, held loosely on the shaft L. (See Fig. 4.) By having the bevel gear-wheel J mounted to slide on and to turn with the shaft J it is evident that the head K can be raised and lowered without throwing the gear-wheels J and J out of mesh, as the shaft J is free to slide through the gearwheel .1, so that the gear-wheels J and J remain in mesh, but the turning motion of the gear-wheel J 8 is transmitted to the shaft J The outer end of the hub L of the clutch-wheel L is engaged by a shifting collar N, mounted to slide loosely on the shaft L and engaged by the forked end of an arm N, secured on the rear end of a shaft N journaled in the bracket E and the main frame E to extend to the front thereof, as will be readily understood by reference to Figs. 1 and 4. On the front end of the shaft N (see Fig. 1) is secured an arm N", connected by a link N" with a bell-crank lever N, fulcrumed on the main frame and connected with one end 3 of a rod N, adapted to be engaged at its other l end by a cam N, (see Fig. 10,) fastened on a l shaft N journaled in a bearing E secured i to the front of the main frame E below the l feed-table C. On the forward end of the shaft N is secured a handle N", adapted to be taken hold of by the operator for turning the l shaft N so as to cause the cam N to shift the rod N from the left to the right to impart a swinging motion to the bell-crank lever I which by the link N and arm N rocks the shaft N for the arm N to move the shifting collar N against the end of the hub L to 3 move the clutch-wheel L in frictional contact with the bevel clutch-wheel L to cause the latter to rotate the clutch-wheel L and consequently the shaft L, for driving the feedwheels I and I, as previously explained. IVhen the operator turns the handle I in a reverse direction, then the pressure on the rod N and the clutch-wheel N is released, so that the latter ceases to rotate, to stop the rotation of the feed-wheels I and I. Thus by the operator manipulating the handle N the I feed-wheels I and I can be stopped or started at any time.

In order to raise and lower the head K, carrying the feedwheels I and I and part of the l l the disks and I.

driving mechanism for the same, the following device is provided: On the head K (see Figs. 1. 2, and 4) is secured a rack K, in mesh with a pinion K (see Fig. 6,) fastened or formed on a shaft K, journaled in suitable bearings carried on the main frame E. On the forward end of the shaft K" is secured a hand-wheel'K", adapted to be turned by the operator to rotate the shaft K for the pinion K to impart an up-and-down sliding mot-ion to the rack K and the head K, so as to bring the bottom surfaces of the feed-Wheels I and I in proper contact with the top face of the work to be fed across the table O.

In order to lock the shaft K", and consequently the head K, in position, but to allow a limited yielding movement of the head to compensate for any inequalities in the work,- the following device is provided, special reference being had to Fig. 6: On the shaft K is secured a friction-disk O, having an approximately Ushaped peripheral groove O, in which fits a correspondingly-shaped frictionblock O engaged by a screw-rod O", screwing in a yoke O, mounted to turn loosely on the friction-disk O. The yoke O is provided with an arm O, (see Figs. 6 and 7,) adapted to abut against either of the stops O and O attached to a bearing E for the shaft K to limit the oscillating movement of the yoke O. Now by screwing the screw-rod O downward the block O is forced with more or less force in frictional contact with the friction-disk O, so as to normally hold the latter against turning; but in case of an undue strain in an upward direction against the head K the pinion K and its shaft K can turn, so as to swing the arm O from the stop O over toward the stop 0 thereby allowing the head K to yield sufficiently to compensate for an increase in the thickness of the work passing over the table O. The weight of the head K and the parts supported thereby is suffieientto return the head in a downward direction in case the work decreases in height, so that the arm O again moves over to the stop O", and in case of an excessive strain the block O will slide in the friction-disk O, so that the head K may move any desired distance upward, provided suflicient force is employed to move the said head in an upward direction.

The front feed-rollerl consists, essentially, of a body made of two feed-disks I and I. between which is clamped a circular driver-l, having its peripheral edge in the form of sharp sayygteeth and extending somewhat beyond the notched or dull toothed peripheral edges of By the arrangement described the disks 1 and I are adapted to move in frictional contact with the upper face of the work, so as to feed the latter rearwardly, while at the same time the sharp teeth of the driver I" cut into the upper face of the work, thus insuring a positive rearward feedingof the work, especially in case the work is slippery, wet, or in an icy condition, and as the said driver 1* is in transverse alinement with the cutting-run of the saw-band A it is evident that the positive rearward feeding of the work is in direct alinement with the cut of the saw, and hence the wood is'not liable to be split or broken at the top face. The rear feed-roller 1 consists of two feed-disks I and 1, similar to the feed-disks 1 and I and between the said feed-disks I and I is clamped a guide-disk 1, adapted to extend into the cut, so as to assist in guiding the work and preventing the cutting-run of the saw-blade from binding in the cut, as the said guide-disk I is in transverse alinement with the cutting-run of the band-saw, and consequently also in alinement with the circular driver I. By the arrangement described an exceedingly fine cut is produced in the wood without danger of the band-saw binding in the cut, thus insuring an easy running of the machine with comparatively little power.

The cutting-run of the saw-band A is engaged by the usual guides P and P to steady the band and prevent wabbling thereof, the guide P being held on the head K and the guide P on the frame E below the table 0, as plainly shown in the drawings.

The table C may be tilted to any desired angle to allow of cutting the work at a bevel of a predetermined degree, and in order to permit such adjustment of the table the following device is provided, special reference being had to Figs. 3, 4c, and 8: On the under side of the table C is secured or formed a segmental slide C the center of which lies in the upper face or top of the table at the intersection with a vertical plane extending transversely through the cutting-run of the sawband A, as will be readily understood by reference to Fig. A. The slide C is mounted to move in correspondingly-shaped guideways E", forming part of the main frame E, and on the under side of the said slide C is formed or secured a segmental rack O in mesh with a pinion Q, fastened or formed on a shaft Q, provided at its rear end with a hand-wheel Q under the control of the operator for turning the shaft Q and the pinion Q, so as to cause the rack C and the segment to travel, thereby tilting the table 0 to any desired degree. In order to indicate the degree to which the table is tilted, the slide 0 is provided at its rear edge (see Fig. 4) with a graduation C, indicating degrees and subdivisions to be read on a pointer or fixed mark C held on the main frame E adjacent to said slide 0 Now by the operator turning the wheel Q the table C can be tilted until the desired degree of graduation C coincides with the mark or pointer C and then the table 0 is locked in this position, and for this purpose the following device is provided: The pinion-shaft Q is mounted to turn loosely in a bearing R, forming part of a jaw R, adapted to engage one edge of the slide C the opposite edge being adapted to be engaged by a resilient jaw R bolted or otherwise secured to the main frame E. (See Fig. 8.) A screw-rod R is rigidly connected with the upper end of the jaw R and extends loosely through the upper end of the jaw R, and on the threaded end of the said screw-rod R screws a nut Ri abutting against the jaw R, so that when the screw-rod is screwed up the jaws R and R are moved toward eachother and in firm contact with the opposite edges of the slide 0 to lock the latter in place. When the nut R is turned in the opposite directionthat is, screwed outwardlythen the jaws R and R are released to allow of moving the slide C in its guideways E on turning the hand-wheel Q), as previously explained. The jaw R is bolted to the main frame E, and the jaw R is made in the form of an angle-iron, so as to yield sufliciently by its own resiliency for insuring-aproper clamping of the slide C by the jaws R and R as above explained. The nut R* is in the shape of a gear-wheel in mesh with a pinion R secured on the hub of a hand-wheel R, mounted to turn loosely on the pinion-shaft and when the hand-wheel R is turned in one direction then the pinion R turns the gear-wheel nut R to move the jaws R and R toward each other, as above explained, for locking the table C in a tilted position, and when the hand-wheel R is turned in the opposite direction then the gear-wheel nut R is unscrewed to release the jaws and the table C. The teeth of the pinion R are suflicientlylong to readily accommodate the sliding lateral movement of the gear-wheel nut R when screwed up or when unscrewed on the screwrod R When the table 0 is in a horizontal position, then its right-hand edge rests on a bracket E forming part of the main frame E, (see Fig. 4:,) the said bracket also supporting one side of a supplementary table C resting at its other side on a lug E on the main frame E.

The operation is as follows: When the shaft B is driven, then a traveling motion is given to the saw-band A in the direction of the arrow a, and at the same time the shaft L and the clutch-gear wheel L are rotated, and when the operator desires to start the feed-rollers I and I he turns the handle N to connect the clutchwheel L with the clutch-wheel L for driving the gearing employed for rotating the feedrollers 1 and I. The work raised on the table by the operator and pushed rearwardly along the gage-rollers D and over the table-rollers D and D finally comes in contact with the teeth of the cutting-run of the saw-band A, so that the latter cuts the work, and as the head K of the feed was previously adjusted according to the thickness of the work under treatment the driver 1* of the revolving front feedroller cuts into the top of the work in aline- I ment with the downward run of the saw-band A to insure a positive rearward feed of the work. The disk I of the rear feedroller I passes into the cut made by the saw-band A, so that the work properly guided in a transverse direction and the saw-band prevented from binding in the cut. The notched plates 1 I and I I of the frontand rear feed-rollers by being in contact with the top face of the work not only feed the latter rearwardly, but prevent sidewise swaying of the work, so that the operator can readily manipulate the work to insure the desired cutting thereof. \Vhcn it is desired to temporarily stop the feed, it is only necessary for the operator to manipulate the handle N, as previously explained, to throw the clutch-wheel L out of contact with the clutch-gear wheel L, and when it is desired to stop the entire machine then the handle F of the shifting device F is actuated to move the driving-belt from the fast pulley to the loose pulley B". 'hen it is desired to cut the Work at the bevel, then the table is unlocked by turning the hand-wheel R, as prev iously explained, and then the operator turns the hand-wheel Q to swing the table into the I desired angular position indicated by the pointer C" on the graduation C. Vhen the desired position is reached, the table is again locked in the adjusted position by the operator manipulating the hand-wheel R correspondingly, as before mentioned.

By mounting the tableC as described it can be readily tilted to the desired position without affecting the position of the downward run of the saw-band A relative to the slot C in the table C.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-* 1. A band-saw provided with a head, a front feed-roller in advance of the saw-band and consisting of two feeding-disks notched at their peripheries and a toothed circular driver between the disks, arranged in transverse alinement with the saw-band, a rear feed-roller in the rear of the saw-band and consisting of two feeding-disks notched peripherally and a guide-disk between the said feeding-disks of the rear feed-roller and in transverse alinement with the saw-band, shafts journaled in the said head and on which the said front and rear feed-rollers are journaled, one of said shafts being driven, a gearing positively connecting the shafts with each other, to rotate the feed-rollers in unison and in the same direction, means for adjusting the head up and down, a driving-shaft journalcd on the frame of the machine, an intermediate shaft slidably journaled at one end in a bearing on the frame of the machine and journaled at the other end in a bearing carried by the said head, gearwheels connecting the driving-shaft with the said intermediate shaft, and gear-wheels connecting the said intern'iediate shaft with the feed-roller shaft to be driven.

2. A band-saw having a feed comprising a head mounted to slide up and down and provided with a rack, driven feed-rollers journaled on the said head, a manually-controlled shaft carrying a pinion in mesh with the said rack, and a yielding locking device for the said shaft, consisting of a friction-disk fastened on the said shaft, a friction-block engaging the said disk, and a yoke *arrying the said block and havinga limited oscillating motion, as set I forth.

3. A band-saw having a feed comprising a head mounted to slide up and down and provided with a rack, driven feedrollers journaled on the said head, a manually-controlled shaft carrying a pinion in mesh with the said rack, and a yielding locking device for the said shaft, consisting of a friction-disk secured on the said shaft and provided with a peripheral groove, a friction-block fitting the said groove, a yoke having a limited turning motion on the said friction-disk, and a screw-rod screwing in the yoke and engaging the said block, as set forth.

4. A- band-saw having a feed comprising a head mounted to slide up and down and provided with a rack, driven feedrollers journaled on the said head, a manually-controlled shaft carrying a pinion in mesh with the said rack, and a yielding locking device for the said shaft, consisting of a friction-disk secured on the said shaft and provided with a peripheral groove, a friction-block fitting the said groove, a yoke having a limited turning motion on the said friction-disk, a screw-rod screwing in the yoke and engaging the said block, and fixed stops between which oscillates the said yoke, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES SEYMOUR.

.lVitnesses:

Geo. W1 .DEATRICK, Jos. BAUER.