US579085A - wesselmann - Google Patents
wesselmann Download PDFInfo
- Publication number
- US579085A US579085A US579085DA US579085A US 579085 A US579085 A US 579085A US 579085D A US579085D A US 579085DA US 579085 A US579085 A US 579085A
- Authority
- US
- United States
- Prior art keywords
- blades
- blade
- shears
- joint
- point
- Prior art date
- 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
Links
- 238000005452 bending Methods 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000002349 favourable Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B13/00—Hand shears; Scissors
- B26B13/06—Hand shears; Scissors characterised by the shape of the blades
Definitions
- blades extending straight throughout the wholelength or also so shaped that one or both blades are bent or twisted spirally, about a quarter-turn or less, from the point to the joint, so that at the point the twisted blade extends or nearly extends in the same direction as the other blade, whether bent or twisted, while toward the joint the blade extends in a vertical or nearly vertical direction relatively to the position of the point portion.
- Figures 1, 2, and 3 show shears with a straight and a spiral blade, the latter of different degreesof twist or curvature.
- Fig. 1 is a section along at at, Fig. 1.
- Fig. 1 is a section along as 00, Fig. 1.
- Fig. 1 is a section along x 00 Fig. 1.
- Fig. 4 is a plan view of shears with both blades spirally shaped.
- Fig. 5 is an end or point view of Fig. 4.
- shear-blades a and b While in former shears the blades, in consequence of concaving or outward bending, spring and at the cutting edges pass with pressure over one another by the bolt pressing the blades against one another, in the present construction the shear-blades a and b have no pressure against one another.
- the blades from the back to the cutting edge retain about the same thickness, and the edge or cutting portion of each blade is formed by a short inclination or bevel, as n or n, Figs; 1 to 1.
- Fig. 1 the blade to is bent toward the left.
- the point 8 thereof lies almost in the same direction or plane with the point 3 of the flat blade I), and the blade at then turns or curves gradually upward to the joint 2', Figs. 1, 1,
- the shears of Figs. 2 and 3 have a blade with curvature extending to the right, whereby the latter, especially in Fig. 3, is spiral in a less degree than in the case of the shears of Fig. 1.
- Scissors or shears constructed according to the principle of the foregoing invention possess decided advantages.
- the cutting edges by simply grinding the bevels or inclines can in the simplest way be kept in cutting condition, while the strong blades cannot yield or bend in cutting; and this is noticeably prevented in the case of the spirally-shaped blade, since it is materially stiffened by the bending or twist.
- the position of the blades during use relatively to one another in the case of spirally-shaped blades, because of the twist or bend of the blades from the joint to the point, is equally favorable and more advantageous than in former shears.
- the severed parts of the material to be cut pass easily back under the blades, as the latter offer slight hindrance. Slipping of the work on the approach of the cutting edges does not readily occur, as the edges from back to front continually grip the same at an angle suitable for shearing, that is, at such an angle at which there is no or only a very slight tendency for pushing the work forward.
- the shears can be produced with little labor, therefore cheaply. They retain the edge and can, moreover, easily be resharpened by simply grinding the narrow bevels forming the edge.
- Scissors or shears comprising a blade having a cutting edge of spiral or screw-threaded twist or shape, the main faces of the blades at the point having a corresponding direction, and passing to vertical or approximately vertical position at the joint, substantially as described.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Scissors And Nippers (AREA)
Description
BRUNO \VESSELMANN, OF GOTTINGEN, GERMANY.
SCISSORS OR SHEARS.
SPECIFICATION forming part of Letters Patent No. 579,085, dated March 16, 1897.
Application filed June 4, 1896. Serial No. 594,295. (NamodelJ corresponding direction with the joint or joint part in which sits the pivot or screw. In the shears forming the subject of this invention one or both of the blades are transposed or twisted relatively to the joint and the cutting edges are formed by inclines or bevels lying in a plane with the inner joint faces, the
blades extending straight throughout the wholelength or also so shaped that one or both blades are bent or twisted spirally, about a quarter-turn or less, from the point to the joint, so that at the point the twisted blade extends or nearly extends in the same direction as the other blade, whether bent or twisted, while toward the joint the blade extends in a vertical or nearly vertical direction relatively to the position of the point portion.
In the annexed drawings, illustrating the invention, Figures 1, 2, and 3 show shears with a straight and a spiral blade, the latter of different degreesof twist or curvature. Fig. 1 is a section along at at, Fig. 1. Fig. 1 is a section along as 00, Fig. 1. Fig. 1 is a section along x 00 Fig. 1. Fig. 4 is a plan view of shears with both blades spirally shaped. Fig. 5 is an end or point view of Fig. 4.
While in former shears the blades, in consequence of concaving or outward bending, spring and at the cutting edges pass with pressure over one another by the bolt pressing the blades against one another, in the present construction the shear-blades a and b have no pressure against one another.
The blades from the back to the cutting edge retain about the same thickness, and the edge or cutting portion of each blade is formed by a short inclination or bevel, as n or n, Figs; 1 to 1.
In Fig. 1 the blade to is bent toward the left. The point 8 thereof lies almost in the same direction or plane with the point 3 of the flat blade I), and the blade at then turns or curves gradually upward to the joint 2', Figs. 1, 1,
1 and 1, where it occupies a nearly vertical position relatively to the other blade I).
The shears of Figs. 2 and 3 have a blade with curvature extending to the right, whereby the latter, especially in Fig. 3, is spiral in a less degree than in the case of the shears of Fig. 1.
From Figs. 4 and 5 it can be seen how the blades extend relatively to one another when each blade is spirally formed.
Scissors or shears constructed according to the principle of the foregoing invention possess decided advantages. The cutting edges by simply grinding the bevels or inclines can in the simplest way be kept in cutting condition, while the strong blades cannot yield or bend in cutting; and this is noticeably prevented in the case of the spirally-shaped blade, since it is materially stiffened by the bending or twist. The position of the blades during use relatively to one another in the case of spirally-shaped blades, because of the twist or bend of the blades from the joint to the point, is equally favorable and more advantageous than in former shears. The severed parts of the material to be cut pass easily back under the blades, as the latter offer slight hindrance. Slipping of the work on the approach of the cutting edges does not readily occur, as the edges from back to front continually grip the same at an angle suitable for shearing, that is, at such an angle at which there is no or only a very slight tendency for pushing the work forward.
The shears can be produced with little labor, therefore cheaply. They retain the edge and can, moreover, easily be resharpened by simply grinding the narrow bevels forming the edge. v
WVhat I claim as new, and desire to secure by Letters Patent, is
Scissors or shears comprising a blade having a cutting edge of spiral or screw-threaded twist or shape, the main faces of the blades at the point having a corresponding direction, and passing to vertical or approximately vertical position at the joint, substantially as described.
In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.
, BRUNO WESSELMANN. Witnesses:
W. HAUPT,
1. Ron. WALDER.
Publications (1)
Publication Number | Publication Date |
---|---|
US579085A true US579085A (en) | 1897-03-16 |
Family
ID=2647770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US579085D Expired - Lifetime US579085A (en) | wesselmann |
Country Status (1)
Country | Link |
---|---|
US (1) | US579085A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2449561A (en) * | 1944-10-03 | 1948-09-21 | Francis L Mcgary | Shear |
US2604695A (en) * | 1944-10-03 | 1952-07-29 | Francis L Mcgary | Shear |
US2728140A (en) * | 1950-12-06 | 1955-12-27 | Krusius Erwin | Scissors with twisted blades having unimpeded surfaces |
US2973679A (en) * | 1957-06-13 | 1961-03-07 | American Optical Corp | Lever actuated trimming device having twisted blades |
-
0
- US US579085D patent/US579085A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2449561A (en) * | 1944-10-03 | 1948-09-21 | Francis L Mcgary | Shear |
US2604695A (en) * | 1944-10-03 | 1952-07-29 | Francis L Mcgary | Shear |
US2728140A (en) * | 1950-12-06 | 1955-12-27 | Krusius Erwin | Scissors with twisted blades having unimpeded surfaces |
US2973679A (en) * | 1957-06-13 | 1961-03-07 | American Optical Corp | Lever actuated trimming device having twisted blades |
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