US2501498A

US2501498A - Abrasion and grinding machine for saws

Info

Publication number: US2501498A
Application number: US57267A
Authority: US
Inventors: Collis Melvin
Original assignee: COYLE E BYBEE; GEORGE JEFFERY
Current assignee: COYLE E BYBEE; GEORGE JEFFERY
Priority date: 1948-10-29
Filing date: 1948-10-29
Publication date: 1950-03-21
Anticipated expiration: 1967-03-21

Description

March 21, 1950 M. COLLIS 2,501,493

ABRASION AND GRINDING MACHINE FOR SAWS Filed ca. 29, 1948 s Sheets-Sheet 1 6 Melvin Collis .& 6 9w ABRASION AND GRINDING MACHINE FOR SAWS Filed Oct. 29, 1948 3 Sheets-Sheet 2 Zhwemlw 6 Welvz'n Collis March 21, 1950 M, co s 2,501,498

ABRASION AND GRINDING MACHINE FUR SAWS Filed Oct. 29, 1948 3 Sheets-Sheet 5 Patented Mar. 21, 1950 2,501,493 ABRASION AND GRINDINGIMACHINE FOR SAW ' Melvin Collis, Chico, Calif., assignor of seventyfive per cent to Ccyle E. Bybee and twenty-five per cent to George Jeffery and Justin Jeffery,

all of Chico, Calif.

Application October 29, 1948, Serial No. 57,267 4 Claims. (01. 76-40) This invention relates to an abrasion and grinding machine for saws.

The primary object of this invention resides in the provision of an abrasion and grinding machine adapted to sharpen the teeth of all types of saws.

Another object of this invention resides in the provision of an abrasion and grinding machine adapted to removably support all types of saws, cutting blades and the like for proper engagement thereof by the grinding disc thereof.

A further object of this invention resides in the combination of the abrasion and grinding machine and attachments for supporting various types of saws, cuttingblades and the like for contact by the rotating grinding disc thereof.

A still further object of this invention resides in the particular construction of the abrasion and grinding machine and the attachments therefor.

Aside from the foregoing objects, this invention resides in the particular construction of the bed-plate of the abrasion and grinding machine.

Among the many objects of this invention is the particular construction and arrangement of the attachments relative to the grinding disc.

One of the salient features of this invention resides in the provision of means whereby those elements to be operated on by the grinding disc can be adjusted relative thereto so as to grind the same in accordance with predetermined specifications.

With these and other objects in view, this invention resides in certain novel features of construction and arrangement of elements to be herein more fully set forth in the specification, illustrated in the accompanying drawings and pointed out in the appended claims and, although this disclosure depicts my present conception of the invention, the right is reserved to resort to such departures therefrom as come within the scope of the claims.

In the accompanying drawings forming a part of this application;

Fig. 1 is a side view of the abrasion and grinding machine showing a disc saw secured thereto.

Fig. 2 is a plan view thereof.

Fig. 3 is a front view of the machine.

Fig. 4 is a longitudinal sectional view taken approximately on line 44 of Fig. 2.

Fig. 5 is a perspective view of the base of the machine.

Fig. 6 is a perspective vie of the bed-plate.

Fig. 7 is a similar view of the adjustable standam.

Fig. 8 is a perspective view of the disc-saw supporting bracket.

Fig. 9 is a detail side view of the machine showing a modified form of stop for the bed-plate.

Fig. 10 is a perspective view of the attachment for retaining a chain saw in opposed position to the grinding disc.

In the present illustration of this invention, the numeral 5 designates, in general, an abrasion and grinding machine consisting of an elongated base 6 having laterally spaced standards I provided with vertically spaced bearing apertures 8 adjacent their upper ends and rigidly secured together by laterally extending braces 9.

Pivotally journalled in an elected aperture 8 of the standards, as by a laterally extending pivot I0 is an elongated bed-plate II having a portion of its front end I2 cut out, as indicated by the numeral I3 with the remaining portion of said front end provided with a rigid upstanding lug I4 having a head I 5 adjustably secured against its outer surface by a pivotal bolt I6 which, through the instrumentality of a thumbscrew I'I thereon, secures said head in predetermined adjusted positions relative to the lug I4 so as to retain a disc grinder I8, splined to a laterally extending shaft I9 journalled on the outer surface of said head in bearings 20 atpredetermined angles relative to the element to be operated on. Said disc grinder is disposed in the aforesaid cut out portion of the bed-plate and has a suitable guard 2| disposed thereover.

Secured to the bed-plate is an electric motor 22 having a pulley 23 splined to its shaft and connected to a pulley 24 splined on the shaft I 9 to transmit power to the disc grinder.

Secured to the aforesaid lug I4 is a forwardly I and upwardly extending handle 25 by which the bed-plate is rocked downwardly on its pivots I0 against the tension of retractile coil springs 26 to engage the disc grinder against work being operated on and upon relaxing downward pressure on the handle, said coil springs elevate the disc grinder for disengagement with the work thereunder a distance governed by a stop-chain 21 connected at one end to the front end of the bed-plate with its opposite end adjustably secured to a hook 28 secured to one of the standards.

'Pivoted on the base forwardly of the standards and beneath the bed-plate, as by a Vertical bolt 29 having a thumb-screw 3U thereon, is an elongated table 3| having a substantially semi-circular inner end 32 and rigidly supporting a standard 33 at its outer end which is provided with a plurality of vertically aligned apertures 34 through which extends a bolt 35 having its outer end extending through an elected aperture 36 in a disc-saw supporting bracket 31 adjustably secured to said standard 33 by a nut 38, screw or bolt.

The aforesaid bracket 37 is of elongated configuration having a substantially circular head 39 provided with an elongated bolt 4!! which extends through a centrally disposed aperture 4| in a disc-saw 42 and slidably supports a cone shaped plug 43 having its smaller end forced in said aperture 4! by a nut 44 screwed on the outer threaded end of said bolt against washers 45 or the like to rigidly secure the disc-saw 'to the bracket. Said head 39 also carries a plurality of studs 45 adapted to retain the disc-saw a suflicient distance from the same to permit the smaller end of said plug to be forced well into the aperture of the disc-saw.

In order to limit downward rocking movement of the bed-plate on its pivots, a stop rod 4? extends upwardly from said standard 33 in the path of the forward end of the same and is adjustable to govern engagement of the disc grinder with the disc saw or other work being operated on.

Subsequent to securing the bracket with the, disc-saw thereon to the standard 33, a set-screw 48 or other similar element carried at the, upper end of the standard is screwed against the inner surface of the disc-saw to prevent chattering of the same when engaged by the disc grinder.

In the modified form of the machine as shown in Fig. 9, rocking movement of the bed-'plateis limited by crank-screws A threaded in opposite ends of an angle-iron beam B which is rigidly secured to the standards orother portions of the base so the outer ends of said crank-screws remain in opposed relation to opposite ends of said i bed-plate, thus providing means to govern contact of the disc grinder with the work and also dispose it at an'elected distance therefrom when in idling position above the work.

In Fig. 10 of the drawings the letter C designates an attachment for supporting a chain-saw in opposed position to the aforesaid disc grinder and consists of an arcuate channel shapedguide D having arms E connected'to the circular head of the bracket 3'1 by bolts F or the like. guide has rollers G disposed therein to support the chain saw with its teeth presented toward the disc. grinder and, in order to secure the chain-saw against accidental sliding movement within the channel of the guide, spring controlled stops H are disposed adjacent opposite ends of the guide for engagement with the adjacent teeth of the chain-saw and, when the operator of the machine has finished grinding those teeth beneath the disc grinder, he either manually lifts the stops from engagement with those teeth engaged thereby or slides the chain-saw along to automatically lift the same to dispose other teeth beneath the disc grinder. Said bracket with the guide thereon is attached to the standard of the table in a manner'heretofore set forth.

With this invention fully set forth, it is manifest that an abrasion and grinding machine of simple construction is provided and through the instrumentality of the adjuncts thereto, all types of saws and cutting blades can be sharpened .and restored to their originalcondition.

Having thus described my invention, what I claim and desire to protect 'by Letters Patent is:

Said p 'rockable bed-plate, an upstanding lug rigidly secured to the forward end of the bed-plate, braces connecting the standards above the base, a head disposed against the outer surface of said lug, a bolt extending through the head and lug, a thumb-nut screwed on the bolt and bearing against the lug, laterally aligned bearings secured to the outer surface of the head, a shaft journalled in said bearings, a disc grinder secured to one end of the shaft and disposed in the cut out area of the bed-plate, an electric motor secured to the bed-plate, pulleys splined to the shafts of the motor and disc grinder, a belt trained over said pulleys, a guard secured to the forward cutout portion of the bed-plate-and extending over the disc grinder, a handle secured to said ing and extending forwardly of the bedplate, retractile coil springs connecting the rear end of the bed-plate to the standards, a chain adjustably connecting the forward end of the bed-plate to the standards, a table disposed on the forward portion of the base, a pivotal bolt extending vertically through the base and table, a thumb-nut screwed on the upper end of said bolt and bearing against the table to secure it in elected positions around the bolt, a standard rigidly secured to the forward end of the table and having a plurality of vertically aligned apertures therethrough, an elongated bracket disposed against the outer surface of the standard and having a plurality of apertures through its outer end and enlarged substantially circular inner end, a bolt connecting the bracket to the standard in adjustedpositions relative thereto, an elongatedbolthaving its outer threaded end secured to the circular inner end of the bracket, studs secured to the circular inner end of the bracket, with their outer ends bearing against the inner surfaces of a disc saw mounted on said elongated bolt, a conical plug slidably mounted on the outer portion-of said elongated bolt with its smaller end extending into a centrally disposed aperture in the disc saw, a washer-disposed on the outer portion of the elongated bolt, a nut secured on the outer end of the elongated bolt and tightened against said washer toforce the conical plug into the aperture of the disc saw and secure it to the bracket; a stop secured to the upper end of the table standard'in the path of the forward end of the bed-plate,,and aset-screw threaded through said table standard adjacent its upper end with its outer end bearing against the inner'surface of the disc saw'toprevent chattering thereof when operated on by the disc grinder.

2. In an abrasion and grinding machine comprising .a base, standards rigidly secured to the base, a rockable bed-plate pivoted to the standards, a table adjustably mounted on the forward end .of the base, a standard rigidly secured to the table, a bed-plate rockably secured to the standards of the base, a power driven discgrinder adjust-ably secured to the front end of said bedplate, a bracket adjustably secured to the standard of. the table, saw supporting means carried by said bracket, retractile coil springs connecting the rear end of the bed-plate to the standards of the base, an elongated beam secured to one of the standards beneath the bed-plate, a handle secured to the forward end of the bed-plate, and crank-screws threaded in opposite ends of said beam with their upper ends disposed in the path of opposite ends of the bed-plate to limit its rocking movement toward and from a saw mounted on the bracket.

3. An abrasion and grinding machine comprising, a base, spaced standards rigidly secured to the base, an elongated bed-plate rockably secured between the standards, a lug rigidly secured to the forward end of the bed-plate, a head pivotally and adjustably secured to said lug, a shaft journalled on said head, a disc grinder secured to one end of the shaft, an electric motor secured to the bed-plate forwardly of its pivoted connections to the standards, power transmitting means connecting the motor to the aforesaid shaft, crossed retractile coil springs connecting opposite sides of the rear end of the bed-plate to opposite standards, stop means on a standard limiting upward rocking movement of the forward end of the bed-plate by the coil springs, a table pivotally and slidably rested on the forward portion of the base, means securing said table in adjusted positions on the base, a standard rigidly secured to the table adjacent the forward end of the bed-plate, cutting element supporting means adjustably secured to the standard of the aforesaid table and retaining a cutting element thereon in the path of the grinder for sharpening the same, and a handle on the bed-plate.

4, An abrasion and grinding machine, the combination of, a base, a bed-plate rockably mounted on the base and biased in one direction by crossed coil springs; a shaft pivotally supported on the forward end of the bed-plate, a grinding wheel secured to the shaft, an electric motor secured to the bed-plate, power transmitting means connecting the motor to the grinding wheel shaft, a standard pivotally and slidably mounted on the forward portion of the base beneath the forward end of the bed-plate, means securing the standard to the base in elected positions thereon, cutting element supporting means adjustably secured to the standard for disposing a cutting element carried thereby in the path of the grinding wheel, and stop means supported by the base limiting both upward and downward rocking movement of the bed-plate.

MELVIN COLLIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 89,724 Abbott et al May 4, 1869 1,145,746 Brown July 6, 1915 2,148,369 Eastwood Feb. 21, 1939 2,200,883 Harten May 14, 1940 2,217,145 Stihl Oct. 8, 1940 2,217,545 Guenther Oct. 8, 1940 2,318,456 Blum May 4, 1943 2,459,233 Mall Jan. 18, 1949