US956873A - Lawn-mower sharpener. - Google Patents

Lawn-mower sharpener. Download PDF

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Publication number
US956873A
US956873A US27638905A US1905276389A US956873A US 956873 A US956873 A US 956873A US 27638905 A US27638905 A US 27638905A US 1905276389 A US1905276389 A US 1905276389A US 956873 A US956873 A US 956873A
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US
United States
Prior art keywords
lawn
mower
lips
sharpener
tool
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US27638905A
Inventor
Harry R Atwater
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osborn Manufacturing Corp
Original Assignee
Osborn Manufacturing Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to US27638905A priority Critical patent/US956873A/en
Application granted granted Critical
Publication of US956873A publication Critical patent/US956873A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
    • B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors

Definitions

  • My invention relates to lawn-mower sharpeners and particularly to that class of the latter in which means are provided for presenting the lawn-mower blade to the abrasive tool at the same angle along the entire edge of the spirally or helically-shaped blade so as to grind or sharpen said edge to a uniform bevel.
  • Figure 1 represents a broken perspective view of my improved lawn-mower sharpener
  • Fig. 2 represents an end view thereof
  • Fig. 3 a front elevation.
  • a suitable handle A having two proecting lips a, in offsets a of which is secured a file or other suitable abrasive tool B.
  • Said tool B in the form illustrated, is square in cross-section and all of its four surfaces are cutting surfaces and can be turned into action successively, according as they become worn.
  • the tool B is retained securely between the lips a by means of the screws 0.
  • the inner surfaces of the lips a exterior to the tool B are of complementary helical conformation so that there is formed between them a spiral or helical groove or guideway a conforming in contour to the blade of a lawn-mower. This is plalnly shown in Fig.
  • the handle A can be made of any suitable metal or wood, and it is often found convenient to form the same of two pieces united by means of screws inserted transversely through the body of the handle instead of inserting them transversely through the inner ends of the lips as shown in the accompanying drawing.
  • the above-described construction enables the sharpener to be moved back and forth along a lawn-mower blade which is retained between the lips a adjacent to the tool B so that the latter contacts with said blade at all points at the same angle so as to grind thereon a uniformly beveled cutting edge.
  • each lip being provided with an offset extending throughout its length; of an abrasive tool fitted in said offsets and rcmovably secured between said lips, the inner surfaces of said lips respectively, being of complementary helical contour and forming a continuous helical guideway between the lips from end to end of the handle, whereby the face of said abrasive tool is at all times presented at an unvariable angle to a lawn mower blade as said sharpener is moved therealong, and means for drawing said lips together to retain said tool in place therebetween.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)
  • Soil Working Implements (AREA)

Description

H. R. ATWATER.
LAWN MOWER SHAEPBNER.
APPLICATION IILBD AUG. 30, 1905.
956,873. Patented May 3. 1910.
mcmiw a cwmm C0, womumoammma wAsmnmon n u UNITED STATES PATENT OFFICE.
HARRY R. ATWATER, 0F CLEVELAND, OHIO, ASSIGNOB- TO THE OSBORN MANUFAC- TURING 00., OF CLEVELAND, OHIO, A CORPORATION OF OHIO.
LAWN-MOWER SHARPENER.
Specification of Letters Patent.
Application filed August 30, 1905.
Patented May 3, .1910.
Serial No. 276,389.
To all whom it may concern:
Be it known that I, HARRY R. A'rwn'rnn, a citizen of the United States, resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Lawn-Mower Sharpeners, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.
My invention relates to lawn-mower sharpeners and particularly to that class of the latter in which means are provided for presenting the lawn-mower blade to the abrasive tool at the same angle along the entire edge of the spirally or helically-shaped blade so as to grind or sharpen said edge to a uniform bevel.
Said invention consists of means hereinafter fully described and specifically set forth in the claim.
The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting but one of various mechanical forms in which the principle of the invention may be used.
In said annexed drawing: Figure 1 represents a broken perspective view of my improved lawn-mower sharpener; Fig. 2 represents an end view thereof; and Fig. 3 a front elevation.
In my im roved lawn-mower sharpener I rovide a suitable handle A having two proecting lips a, in offsets a of which is secured a file or other suitable abrasive tool B. Said tool B, in the form illustrated, is square in cross-section and all of its four surfaces are cutting surfaces and can be turned into action successively, according as they become worn. The tool B is retained securely between the lips a by means of the screws 0. The inner surfaces of the lips a exterior to the tool B are of complementary helical conformation so that there is formed between them a spiral or helical groove or guideway a conforming in contour to the blade of a lawn-mower. This is plalnly shown in Fig.
-2 where the inclination of the near and far ends a, a, respectively, of the guideway a can be seen. The handle A can be made of any suitable metal or wood, and it is often found convenient to form the same of two pieces united by means of screws inserted transversely through the body of the handle instead of inserting them transversely through the inner ends of the lips as shown in the accompanying drawing.
The above-described construction enables the sharpener to be moved back and forth along a lawn-mower blade which is retained between the lips a adjacent to the tool B so that the latter contacts with said blade at all points at the same angle so as to grind thereon a uniformly beveled cutting edge.
Having thus described my invention in detail, that which I particularly point out and distinctly claim, is:
In a lawn mower sharpener, the combination with a handle of general tubular form,
split longitudinally along one side and having two projecting lips, one on each side of the opening thus provided, each lip being provided with an offset extending throughout its length; of an abrasive tool fitted in said offsets and rcmovably secured between said lips, the inner surfaces of said lips respectively, being of complementary helical contour and forming a continuous helical guideway between the lips from end to end of the handle, whereby the face of said abrasive tool is at all times presented at an unvariable angle to a lawn mower blade as said sharpener is moved therealong, and means for drawing said lips together to retain said tool in place therebetween.
Signed by me this 12 day of August 1905.
HARRY R. ATIVATER.
Attested by J NO. F. OBERLIN, G. W. SAYWELL.
US27638905A 1905-08-30 1905-08-30 Lawn-mower sharpener. Expired - Lifetime US956873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US27638905A US956873A (en) 1905-08-30 1905-08-30 Lawn-mower sharpener.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27638905A US956873A (en) 1905-08-30 1905-08-30 Lawn-mower sharpener.

Publications (1)

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US956873A true US956873A (en) 1910-05-03

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