US1987421A - Razor blade honing machine - Google Patents

Description

Ja 8, 9 v G. J. SOUTHLAND ET AL RAZOR BLADE HONING MACHINE Filed May 8, 1955 Garret J. S0ulh1am1 and Joseph Casper Patented Jan. 8, 1935 STATES a Razor; BLADE Home nm;

a Genet J. Southland andJoscph'Gasper,

. Blaine, Wash.

Application May s. 1933, strains; 669,902

' 1 Claim: (01. 51-459) Our invention relates to improvements in. razor blade honing machines and has for an object to provide a hand-operated machine of this type of simple and inexpensive design yet,

having the accuracy of adjustments and'operation of more complicated and expensive machines.

Other objects of our improvement will appear as the description proceeds.

We attain these and other objects of our im.-.

provement with. the mechanism illustrated in the sheet of drawing accompanying this specification and forming a part thereof. in which Figure 1 is a plan View of our razor blade honing machine, Fig. 2- is a side elevation'of Fig. 1, Fig. 3

is a plan view of the oscillative blade clamp, drawn vWith more particular reference to the indi.---

cated parts: A frame is, formed from a piece of sheetmetal having the front end 6, the rear end 7 and the bottom 8. The false bottom 9 is fas--. tened in the said frame parallel with the bottom 8 and spaced apart therefrom. The bearing. brackets 10, 10 are fastened to the rear end at the top-corners thereof having the aligned bearings 11, 11. The two guide and clamping rods 12, 12 are extended through. aligned holes in the ends of the frame near the top corners thereof and are disposed parallel with each other and at right angles with the frame ends. are provided with heads, threaded ends and nuts thereon whereby they are used to retain the frame ends in parallel relation. There are four holes through. the bottom 8 two of which are shown at 13, 13. Aligned with the holes 13 are tapped holes in the false bottom 9 in which are engaged the four adjustment screws-14, 14, 14, 14. Be.- tween the ends 6 and '7 and the rods 12 is disposed the. hone 15 bearing on theupper endsof the four screws 14-. The clamping screw 0.15 is engaged in a tapped hole through the back end '7 disposed to bear on the rear end of the hone 15 to-v clamp the same between the front end 6 and the said screw a15.

The pair of bearing slide blocks 16, 16 are mounted for reciprocation on the rods 12, 12 and have bearing holes therein which are aligned when the blocks are opposite each other. The

1 rockshaft 17 is mounted for oscillation in the said bearing holes in the slide blocks 16, 16. The central portion of the shaft l'lis flattened and has fastened thereon the base clamp plate 18 which has the two hinge cars 19, 19 on one end and the bent-over catch ZO on the other end indicate similar pats- These rods meiebi ear..22. on one end, the two-part, bent-over latch 23, 23 and, the handle-24 onits other end. The

hinge ears 19, 19 and. 22'have aligned holes therein through which 'isextended the hinge. pin 23' joiningthe same inhingerelati'o'n, providing for the plate 21 to oscillate on the said hinge and disposing thelatch 23, 23in close frictional rela The top clamp, ate 21 has the hinge.

ATEN --OFF E tion'with the catch. 20 when theclamp plates 18 and 21 are in close relation with the space. .21 therebetween- The studs 25,- 25 on the base plate 18 extend. through the holes 26, 26 in the plate'21 whenthe said plates are engaged by the latch 23 on the: catch. 20.

vWhen the hinged plate 21 .is raised free of the base plate. 18 .a razor blade 28, having holes therein through-which the studs 25 may be extended, may be placedon the baseplate 18 with the said studsextendinathrough the said razor blade holes, and by returning the'plate 21 to engage the latclr 23 with the catch 20 the said blade is engaged in thenarrowspace 27 bythesaid and 21."

The shaft 29' is. mounted for revolution in the bearings 11. 11 and has the cranks 30- and 31 studs and firmly clamped between the plates 18- on the ends thereof. The said'cranks are of 1 equal length, opposite each. other and disposed:

adjacent the said bearings in the same. plane.

Theends of the cranks 30 and31. are bent out ward at right angles providing the long crank pin 32 and the short crank pin 34 respectively. The crank pin 32 is extended through a hole in one end of. one of the side bars 35 and alsothrough a hole in crank, handle 33 and has itsouter end upset to. retain the bar and handle in place there- I on.- The-"crank pin 34 is extended through a hole in one end of the other sidebar 35 and has its outer end upset to retain the bar in place thereon. 1 The side bars 35, 35 are of equal length and have holes through their other ends through which are extended the ends of theshaft 17. There are two spring cranks 36, 36

each having a.hook 37 on one end. and a hole throughthe other end. These spring cranks are mounted onthe outer ends of the shaft1'7 in a manner whereby they are firmly fastened upon A helical spring 40 is fastened tothe hook 37 on each of the spring cranks 36 and to the stud 39 on each of the side bars 35 to react therebetween 12 and at a distance beneath the shaft 17, de-- termined by the beveled cutting edges of the blade 28, by adjusting the screws 14, the kerfs of which are accessible to a screw-driver extended through the holes 13. Having set the hone in the suitable position, it is retained therein with the clamping screw 1115.

The cranks 30 and 31 may be revolved in either direction, but, preferably, they are turned in the direction indicated by the arrows. 2 the farthest forward, positions of the blade 28, the blade holder 21, the slide bearings 16, the cranks 30 and 31, the-handle 33 and the springs 40 are shown in solid lines, while the farthest rearward positions of these instrumentalities are shown in dotted lines and indicated by the primes of the numbers indicating the said forward positions thereof. 7

In Fig. 2 the spring crank 36 is inclined downward, causing the blade 28, not shown in Fig. 2, to bear with its forward edge on the hone 15 and be retained in resilient contact therewith by the reaction of the spring 40. This spring reaction tends to retain the said blade edge in contact with the hone because the spring 40 is below the shaft 17 although the side bar 35 is parallel with the rod 12. In Fig. 5 the crank 30, when at its dotted position at 30", is about 75 in advance, of its position shown in Fig. 2. At this crank position the slide bearing 16, the shaft 17, the side bar 30, the spring crank 36, the handle 33 and the spring 40 are in positions indicated by the seconds of the said designating numbers, disposing the blade 28 at 28" in a position less than one half of its operative reciprocative movement from its most forward'position over the hone 15 and tilted with its rearedge bearing on the said hone. By continuing the crank revolution in the same direction till it reaches its position at 30' in Fig. 1

.the blade will have reached its farthest rearward position at 28 and'its rear cutting edge will have remained in contact with the hone from its illus- Fig. 1 to its position at 28" in Fig. 5 but also tilted the blade to transfer its contact with the hone from its front to its rear edge. This tilting of the blade'was due to the upward movement of the stud from its position at 39 in Figs. 1 and 2 to its 7 position at 39" in Fig. 5, causing the spring 40 to pass above the shaft 1'7.

' By turning the crank 30 from its position at 30' in Fig. 1 to its position at 30" in Fig. 5 it will have moved through an angle of about 75 and carried the blade from its position at 28' to its position at 28" and at the same time have moved the slide bearing 16, the shaft 17, the side bar 35 the spring crank 36, the stud 39 the handle 33 and the spring 40 to the thirds of these designating characters.

As stated above, when in the position at 28, the blade was tilted to cause its rear edge to bear on the hone, but by moving the crank from its position at 30 to its position at 30'," the springs 30 and 31 from their said position when the crank 30 is at 30" till'they reach their position shown In Figs. 1 and By. continuing the forward revolution of the cranks in solid lines in Figs. 1 and 2, the blade 28 is moved forward to the front edge of the hone with its front edge in contact therewith.

It is now clear'that continuous revolution of the cranks 30 and 31 will cause the blade '28 to move forth and back over the hone intermittently changing its edge contacting therewith twice for eachrevolution of the said cranks.

In practice, when the blade is sufliciently honed on one side of its cutting edges the top clamp 'plate 21 is lifted by pulling upward on the handle .24 and the bladeiisreversed in the clamp and is completed. For, in practice, it has been'found that the sharpening of razor blades on the described honingmechanism provides a good cutting edge, without the usual subsequent stropping thereof. 1 r

The pressure provided by the springs 40 retains the edge being sharpened in contact'with the hone except at the periods when the blade is being tilted by operation of added pressure from the springs. It is important that the pressure which retains the edge being sharpened in honing contact be suitable.

With this inview a few adjustments of this pressure'may be made by engaging the studs 39 in others of the tapped holes 38 than those in which they are shown as'being engaged.

Although a razor blade clamp suited for holding but one of the well-know'n'types of razor blades is shown and described, it is evident that our clamp may be adapted for any of the usual shapes of razor blades.

Only one mechanical reduction of our invention is herein disclosed, yet any variation therefrom which retains the essence of our invention is within its purview, and *we desire to have it so understood. a

Having thus disclosed our invention, what we claim as new therein-and desire to secure by Letters Patent is,-

A razor blade honing machine including, a

hone, a pair of parallel slideway rods, means to retain the operative surface of the said hone and the said slideway rods in parallel planes, a bearing block mounted for reciprocation on each of the said slideway rods, a razor blade clamp adapt 1 ed to releasably retain a razor blade, aligned rockshaft ends fastened on the ends of the blade clamp mounted in bearings in the said bearing blocks for oscillation and protruding beyond the said blocks; bearingbrackets fastened to the said slideway rods having aligned bearings therein 'parallel with the said rockshaft ends, a crank shaft mounted in the said bracket bearings, equal opposite driving cranks fastened on the ends of I the said crank shaft disposed in the same plane, a crank pin on each of the said cranks, two equal sidebars each having one end thereof mounted on one of the said rockshaft ends and the other end thereof mounted on one of the said crank pins, two. equal spring cranks each fastened on one of the said rockshaft ends to oscillate the same disposed in the plane of the said blade clamp, and a tension spring fastened to the outer ends of each of the spring cranks and to each of the said sidebars reacting to tilt the said blade clamp by oscillating the said spring cranks as the said sidebars reciprocate and oscillate.

GERRET J. SOUTHLAND.

JOSEPH CASPER.

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