GB756935A - Improvements in or relating to garden shears, scissors and like pivoted cutting tools - Google Patents
Improvements in or relating to garden shears, scissors and like pivoted cutting toolsInfo
- Publication number
- GB756935A GB756935A GB908153A GB908153A GB756935A GB 756935 A GB756935 A GB 756935A GB 908153 A GB908153 A GB 908153A GB 908153 A GB908153 A GB 908153A GB 756935 A GB756935 A GB 756935A
- Authority
- GB
- United Kingdom
- Prior art keywords
- angle
- blades
- cutting edges
- fulcrum
- intersection
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/04—Apparatus for trimming hedges, e.g. hedge shears
- A01G3/047—Apparatus for trimming hedges, e.g. hedge shears portable
- A01G3/0475—Hedge shears
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Environmental Sciences (AREA)
- Scissors And Nippers (AREA)
Abstract
756,935. Shears &c. WILKINSON SWORD CO., Ltd., and RANDOLPH, H. B. March 26, 1954 [April 1, 1953], No. 9081/53. Class 30. The cutting edge of at least one blade of shears &c. is convexly curved over a portion near the fulcrum the remainder of that edge being straight and the cutting edge of the cooperating blade being straight or convexly curved over a corresponding portion so that over that arc of opening during which the point of intersection of the cutting edges lies on the curved portion the angle of intersection between the cutting edges remains substantially constant. As shown, the cutting edges of blades 10 are recessed near the fulcrum 11 to form convex portions 10b, the angle of opening of the blades remaining substantially constant while the point of intersection of the cutting edges is on the part XY of the bisector 13 and being less than the angle of opening for straight edged blades 10c which intersect at W spaced farther from the fulcrum with consequent loss of mechanical advantage. Slipping of the material to be cut is avoided by forming the curvature so that the angle between the curved edge and the bisector is less than the friction angle for the material. In order to increase the rigidity of the blades they may be hollow forged as disclosed in Specification 756,928. According to the Provisional Specification toothed blade edges are provided as disclosed in Specification 706,296.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB908153A GB756935A (en) | 1953-04-01 | 1953-04-01 | Improvements in or relating to garden shears, scissors and like pivoted cutting tools |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB908153A GB756935A (en) | 1953-04-01 | 1953-04-01 | Improvements in or relating to garden shears, scissors and like pivoted cutting tools |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB756935A true GB756935A (en) | 1956-09-12 |
Family
ID=9864991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB908153A Expired GB756935A (en) | 1953-04-01 | 1953-04-01 | Improvements in or relating to garden shears, scissors and like pivoted cutting tools |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB756935A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110786163A (en) * | 2018-08-03 | 2020-02-14 | 浙江东桥精密机械有限公司 | Electric pruning shears |
-
1953
- 1953-04-01 GB GB908153A patent/GB756935A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110786163A (en) * | 2018-08-03 | 2020-02-14 | 浙江东桥精密机械有限公司 | Electric pruning shears |
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