US966732A

US966732A - Tool-sharpener.

Info

Publication number: US966732A
Application number: US46204108A
Authority: US
Inventors: Morris W Brinkmann
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-11-11
Filing date: 1908-11-11
Publication date: 1910-08-09
Anticipated expiration: 1927-08-09

Description

M. W. VBMNKNMNBI.

TOOL SHARPENER.

APPLICATION FILED NOV. 11, 1908.

Patented Aug. 9, 1910 4 SHEETS-SHEET 1 Si [Ue/14100 J J Z Z- :L

@witnesses M. W. BRINKMANN.

TOOL SHARPBNER,

APPLICATION FILED NOV. l1, 1903.

aented Aug. 9, 1910.

4 BHBETBf-SHBET 2.

M. W. BRINKMANN.

TOOL SHARPBNBE.

APPLIOATION FILED NOV.11. 1908. `965973, Patented Aug. 9, 1919.

4 SHEETS-SHEET 3.

@WW1/modes: l I nvaukoz M. W. BRINKMANN.

TOOL SHARPENER.

APPLICATION FILED NOV.11, 1908.

Patented Aug. 9, 1910.

4 SHEETS-SHEET 4.

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UNITED STATES 'PATENT GFFICE.

MORRIS W. BRINKMANN, OF NEW YORK, N. Y.

TOOL-SHARPEN ER.

To all whom it may concern: y y Be it known that I, MORRIS W. BRINK- MANN, a citizen of the United States, resid- .ing in the borough of Manhattan of the city of New York, in the State of New York, have invented certain new and useful Improvements in Tool-Sharpeners, of which the following is a specification, reference being had to the accompanying drawings,vform1ng a part hereof.

This invention relates to means for sharpening tools, particularly such tools as twist. drills, With mathematical accuracy, and consists 1n the new and novel features of construction and combination of parts hereinafter set forth and claimed. p

In the accompanying drawings Figure 1 represents a plan viewof my improved n rachine. I",ig.f2 represents an end elevation of the same. Fig. 3 represents a side elevation showin/g the standards and part of the bearings in sections. Fig. 4l is a detail view showing the bearings for the driving shaft and the rocking frame. Fig. 5 is a side elevation partly in section of the tool holder. Fig. 6 is a detail View showing a modified means for centering the tool. Figs. 7 and 8 represent front and rear views respectively of the tool holder.

The tool 1 to be ground, for example a twist drill, is secured in a holder 2 supported by an arm 3 upon standards 4, fitted like the slide rest ofa lathe and provided with suitable graduations (i whereby the position of the holder may be accurately and readily determined. The holder is provided With a hollow head 7 whi :h forms a bearing for a carrier 8 rotatablyl mounted therein.

Said carrier is provided eccentric to its axis and to the axis of the holder with a bearing for a barrel or hollow spindle 9 to receive the tool to be ground. The rear end or butt 0f the tool seats ina edn/ical recess provided in an aliner 10 moval'yle in the barrel; which centers the rear end of' the tool. Said aliner may be fed forward by any suitable means as by threads provided upon a shank 11 formed `integral therewith and may be held in its adjusted position by a key 12 actuated by any suit-able means, asthe beveled or pointed end of a small shaft 13 mounted in the shank 11 and actuated by a handle 14. The point or cutting end of the tool 1 is held in a chuck 15'secured to the barrel 8 and if a tool suchas a twist drill is to be ground, the point is further held by oppo- Specication of Letters Patent.

Application filed November 11, 1908. Serial No. 462,041.

rasen-tea Aug. a, 191e.

engage behind the heel of the cutting lip. i aid fingers or extensions arepreferably formed integral with levers 17 pivoted to lugs or extensions 18 secured to the chuck and having their reareuds provided with rollers 19 that engage the beveled face of hardened'steel cone 20. Both the carrier and the barrel have flanges 21 and 22 respectively secured to or formed integral there- With, and any suitable means as the stops are provided for the purpose of holding the carrier and the barrel in their adjusted positions, and so as to determine the degree of eccentricity employed. Suitable means either with or independently of the .ca-iier. A smaller wheel 25 is secured to a sleeve .26 threaded to engage with the shank upon the aliner and feed same forward into Contact with the end of the drill.

The grinding device or tool 27, preferably an emery Wheel, is keyed upon an arbor 28 mounted in a frame 29, which is adapted to be rocked transversely to the point of the tool to beground. The frame is provided with a hollow7 trunnion 30 mounted in bear.- ings 31 provided in the standards 4. Said bearings are formed in part by slip cones32 which are adjustable so that the bearing can be kept perfectly true. The trunnions are hollow and, in turn, provide bearings` Jr'or the driving shaft-'33 whichrotatcs the grinding device by any suitable means as belts 34. The swinging or rocking movement is impartedfto the frame by a crank arm 35 provided With an adjustable pin 36. The crank is seuredto a shaft 37 mounted in a bearing 38 provided in the standards 4t and is actuated from the main driving shaft by any suitable means as the belts 39. l

It' desired a liquid reservoir 40 is secured to the standards, from which. a suitable liquid may be supplied to the grindingdeliquid after being used is collected by a pan #hand is returned to the reservoir by a pipe ft-i. Preferably the reservoir is provided with a narrow partition Llli lengthwise thereot'. which separates and collects the. particles ot' metal or emery carried down to the reservoir by the returning liquid. The pump may be actuated by a pulley .-16 upon one end of the main driving shaft.

i sitely arranged fingers or extensions 16 thatI The operation of my machine is as folas a hand wheel 24 is secured to the barrel .and provides means for rotating the .same

vice by a pump 41 through pipes 42. A'The l emery ,wheel or vither 'S enanas lows: The drill ilto be sharpened lis placed' in thefbarrel or "spindle 9 and is carefully adjusted by means of the fingers 16 engaging the same and thealiner 10 is then caused to engage the end of the dri-ll so that it shall v If a twist drill.

be firmly held and centered. v is to befvround'the' barrel 'or spindle. 9 is fixed. to ti'e carrier 8 by means 'of the stop 23 which is then given a slight to and fro movement which causesythe lip of the drill -tobe ground away. lWhen one lip has been 'properly ground the carrier and barrel are given ahalf turn which brings the-other lip of the drill adjacent to the grinding device and theoperatioii is repeated. lIn case a center punch or similar tool is to be ground the-carrier is'A adjusted-so as toarrange the axis of the toolat the desired angle to the rinder and the barrel orspindle is Arotated independently -of the carrier. KSince jthe grinding device is given. a to and fro movement duringlthe grinding operation the wear 4will be evenly distributed oyer the face of the wheel thus maintaining a true face, and 'consequently a much more accurate cut can be obtained than is possible when the emery wheel is in fixed relation to the holder, vor when the wear of the wheel occurs practically .in onefpath.

Although I have described -one form of mechanism embodying Amy inventionit is obvious that various changes within the skill `of the mechanic may be made therein with- -out ,departing from the spirit ofthe invention provided the meansSet-Orth in the fol lowing claims be employed.

.I' claim as my invention:

l. In a tool sharpenerlthe vcombination .'With' a holder for the tool to be ground oom- -prising means for rotating said tool, of a' v grinding device and means to -move lsaid grindin ldevice transversely tothe axis of the tool during the grinding operation.

'2'. In a4 tool Sharpener the combination with a holder for the tool'to b'e ground oomprising means for rotating said tool, of a' 'Y grinding device andv meansv to rock said grinding device through a predetermined ar'ctransversely to 'the point of the tool during the grindingoperation.

` 3. In "a tool sharpener the Acombination with'a holder for'the tool to vbe ground and means to rotate said tool eccentrically to thel axis of the holder, of ad grindinggdgice, and

' trically to the axis of the holder, of a grind;V`

means to rock said grinding device duringYV the grinding operation. 1 4; In a tool Sharpener the vcombination with a holderA comprisinga carrierfor'the tool to be ground rotatably -mounted in the holder and means to rotatethe tool eccening device, means for rotating said grinding fdevic'e, and means orrocking said grinding device during-the grinding operation.` In a tool Sharpener the combination 4tr-unnions for actuating said grinding tool.

7.In a tool Sharpener the combination withv supporting standards, of a frame movf ably mounted in bearings provided in said standards, a grinding toolon said frame, and adjustable means for imparting a rocking1 moveineiitito said frame andgrinding too 8.`In va tool ySharpener the combination with supporting standards, of a Jframe pro-l -vided with hollow -trunnions mounted in bearings provided in said standards, agrind-.-

ing tool on said frame, means for rocking saidframe, anda driving shaft mounted in said trunnioi'is concentrically therewith andV ope'lratively connected with said grinding too. M

9. In a tool Sharpener the combination with supporting standards, of a frame movably mounted on said standards, a grinding .tool von said trame, al reservoircontaining liquid supported-onsaid standards, apui'npA for supplying the liquid to.'v said grinding tool, means for rocking said frame land means for operating said pump 'to' supply` liquid from the reservoir to the grinderi- 10. In a tool Sharpener the combinationl with supporting standards, of a vframe mov- I ably mounted on said standards, means for rockin-g the frame, a grinding toolon said frame, a gravity separating tank containing liquid supported on said standards, and a pump ttor supplying liquid fran said tanki .I

to the grinding tool.

11. In a tool-Sharpener the combination 'with a grinding device, ot a holder for -the tool'to be ground, said holder comprising a chuck providedwith fingers adapted to en- Agage opposite faces of -sai'd tool and hold V same in aliiiement against rotation in the holder,and movable means engaging the end,v

of the moi to center the same.

iis

12. In. a tool Sharpener the combination Y with a grinding device, of a holder for the` tool to be ground,'saidhold'er comprising a fingers adapted to seat against theedgeso said tool and hold samgagainst rotation, ant. movable means provided samer,A l

113. In a tool sharpener the combination` with a grinding device, of a holder for the tool'tob'e ground, said holder being `pro A. f

vided'with a conical recess-to receive the endof the tool, and means on the-holderA `chuck provided. Yivitli oppositely arranged with a recess to.-

receive the end of the tool to center tha-'121sv eeegee to center the tool in said recess, and means -to hold same in its adjusted position.

14. Ina tool Sharpener the combination with a rocking frame and a grinding device mounted on said frame, of a holder for the tool to' be. ground, means on said holder to center the tool and hold same in its adjusted position, means to rotate the tool during the grinding operation, and means to feed said tool toward the grinder, substantially as described.

l5. In a tool Sharpener the combination with a rocking frame. a grinding devioe mounted in said frame and means for rocking said frame, of a holder for the tool to 15 against movement relatively to said holder, 20

substantially as described.

This speifieation signed and witnessed this 29th day of October, A. D. 1908.

MORRIS W. BRINKMANN.

Signed in the presence'of- THoMAs J. CANTY, MARGARET W. BEST.