US2169580A - Scissors and shears - Google Patents

Description

Aug. 15, 1939. J; J. cbNwAY 5 SCISSORS AND SHEARS Filed Feb. 11, 1937 M ATTORNEYS.

Patented Aug. 15, 1939 UNITED s 'ra'rss rArsNT oFFmE SCISSORS AND snEARs Application February 11, 1937, Serial No. 125,233

' 1 Claim.

This invention relates to new and useful improvements in shears and scissors (both hereinafter referred to as shears for convenience) and has for an object to provide for the proper oiling or lubrication of the ride portions of the shears.

Another object is to provide for the oiling of a shears in such a manner that the lubricantis kept in the proper places on the shears so that the shears are properly lubricated and there is no danger of soiling of the hands of a user or the material being out.

A further object is to provide means whereby a shear having a better and more uniform running action is obtained.

Other objects and advantages will become ap parent from a consideration of the following detailed description taken in connection with the accompanying drawing wherein satisfactory embodiments of the invention are shown. However, it is to be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of th appended claim.

In the drawing:

Fig. 1 is a plan view showing a shearsincorporating the improvements of the invention Fig. 2 is a view partly inedgc elevation and partly in section and on an enlarged scale showing the portion of the shears adjacent the pivot thereof;

Fig. 3 is a transverse sectional View taken substantially along the line 33 of Fig. 1;

Fig. 4 is an enlarged elevational view looking into the ride portion of one of the blades of the shear;

Fig. 5 is a plan view of the pivot portion of a shears and showing a slight modification;

Fig. 6 is a transverse sectional view along the line 6-6 of Fig. 5;

Fig. '7 is a perspective view of the insert member used between the shear blades in Figs. 5 and 6;

Fig. 8 is a view similar to Fig. 5 but Showing another modification;

Fig. 9 is a transverse sectional view taken along the line 99 of Fig. 8;

Fig. 10 is a perspective view of the insert member used between the blades of the shears of Figs. 8 and 9; and

Fig. 11 is a similar view showing a modifica tion of insert member that may be used.

Referring in detail to the drawing and at first particularly to the form of the invention shown in Figs. 1 through 4 the shears generally designated I include blades II and [2 connected by a pivot l3, and each beyond its pivot having a shank portion [4 while beyond its shank portion blade I I includes a finger bow or handle i while in a similar location blade l2 includes a thumb bow or handle l6. Generally the pivot 13 is rigid 5 with the lower or blade having the finger bow as by riveting over the end l3a or other suitable means, and forms means about which the other blade is turned.

:In a shears the place for oil or other lubricant is on the rides, the latter comprising the inner surface portions of the blades from a point some-- what ahead of the pivot l3 and extending to the point where the blade proper meets the shank Hi. There is nothing to retain the oil on the 15 rides and oil applied to these rides soon runs ofi so that they are no longer lubricated, and furthermore it must be applied in very sparing quantities as otherwise it is likely to run along the blades or the handles and soil the material being cut or the hands of the user. This means that if oil is applied to the rides it must be applied very frequently and the result is that for the most part users do not oil their shears.

Blade H in its ride portion ll is (see Fig. 4) provided'with an elongated recess [8 extending to each side of the pivot opening l9, and into this recess is introduced an elongated oiler bearing member Qiipreferably formed of a fibrous mate rial as fairly hard or compressed leather or what is known as compressed fibre, or the like. It is sufiiciently hard to form a bearing for the upper blade and is also of a material which absorbs or becomes saturated with oil so as to retain this oil and lubricate the bearing surface between this member and the movable blade. Said member is of such thickness that its outer surface is disposed beyond or above the surface of ride I l. In the blade l2 adjacent the pivot opening thereof is an oil hole 2| through which oil may be. introduced for absorption by the fibrous member 20. This member may be introduced into the recess l8 in a dry condition in which case it may be left for the user to apply the initial oil. However, if desired, the member may be saturated by the manufacturer of the shears and thereafter it is only necessary that occasionally the user apply a small quantity of oil to the member through the hole 2|.

As the member 20 is of a thickness to extend above the recess l8 it will be apparent that the ride of the blade I2 does not bear on the ride of the blade H but only on the upper or outer surface of the member 20. Since this member is preferably fibrous it may be kept supplied with oil and afford the required lubrication between the blades and at the same time will retain the oil against flowing along the blades or handles.

The member is somewhat resilient and provides the only bearing between the blades, and comprises means whereby a better and more uniform running of the shear is obtained. This is true since it is practically impossible to get the same angle of ground surface and thus an accurate relation between the blades at the pivot l3, or to extend throughout the length of the blades. With the member 20 in place and forming the bearing between the blades a more easy and smooth cutting action for the full lengths of the blades is. obtained, apparently due to a slight yield or give to the member to compensate for irregularities or variations in the blades. Thus with the member 20 in place the shears are properly lubricated and a superior cutting-action between the blades is obtained.

As the member is partly disposed in the elongated recess l8 it will be apparent that when p the shear blades are closed as in Fig. l the memassume a position crosswise of the blades and out of alignment with the oil hole or to project at its ends beyond the edges of the blade.

Figs. 5, 6 and 7 show alslightly different arrangement wherein the oiler bearing between the shear blades is in the form of an annular or circular discv 22 also preferably of a fibrous material as leather or the like. The annulus member 22 is simply placed between the rides of the blades 23 and 24 of the figures of, themodification and has an opening 25 for the passage of the pivot 28. In the blade 24 adjacent the opening therein for the pivot 28 is an. oil hole 2? whereby oil may be introduced to the annulus or member'22. The latter in Figs. 5 through 7 functions in the same manner as the member 20 of the figures first described, but being circular need not be recessed or otherwise treated to hold it against turning about thepivot .26 since any such turning of the member will not expose it at the edges of the blades and will not take it out of alignment with the oil hole 21.. 'However, if

it is preferred this member should not turn, the

opening 25 can be made non-circular as shown or given some other non-circular shape, and the portion 26a of the pivot screw in this opening given a similar shape.

In the modification of Figs. 8, 9 and 10 an elongated oiler bearing member 28 is disposed between the shear blades 29 and 38, and as in the 7 hole 3| of non-circular shape, that shown being of rectangular configuration, and the pivot 32 for the shear blades is provided with a similarly shaped portion such as the rectangular portion 33 entering said rectangular hole 3| whereby turning of the member 28 about the pivot is prevented. Blade 30 is provided with an oil hole 34 through which oil may be supplied to the member 28. With reference to the lubrication and the producing of a smooth cutting action of the blades the member 28 functions the same as the members 20 and 22.

When an elongated oiler bearing member is used inserted between the rides of blades neither of which has a recess it is not necessary that the member be provided with a square opening and that the pivot be provided with a corresponding shank portion. It is only necessary that the member and pivot have engaging non-circular portions whereby turning of the'member about the pivot will be. prevented. Thus in Fig. 11 there is shown an oiler bearing member 35 having a D-shaped opening 36 therein or an opening with one straight side for the reception of a' correspondingly shaped portion of a pivot. Obviously other shapes of openings may be used to cooperate with other shapes of pivot portions to prevent turning of elongated oiler bearing members on shear blade pivots.

Having thus set forth the nature of my in vention, what I claim is: a a

A shears comprising a pair of blades pivotally Member 28 is not set connected together andhaving ride portions, one 7 of the ride portions comprising a bearing member embracing the pivot and made of an oil absorp- JOHN J. CONWAY.

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