Scissors, particularly hairdressers' scissors
United States Patent 3906630
Scissors useful particularly by hairdressers comprise a movable blade pivotally connected to a stationary blade with a bow member disposed on the respective stock portions of the blades to form a handle portion for the scissors. At least one of the bow members is freely pivotally mounted on a respective stock portion so that the bow member is turned within an angular range during use of the scissors. Arresting means are provided for detachably fixing the axial position of the one bow member with respect to the respective stock portion. The arresting means includes a plurality of indentations disposed along the axis of the stock portion and a releasably disposed detent means for engaging one of the indentations to fix the axial position of said one bow member during use of the scissors.
US Patent References:
Wrench having an extension handle associated with measuring indicia
Blunt - December 1960 - 2964981
Wrench having an extension handle associated with measuring indicia
Blunt - December 1960 - 2964981
Application Number:
05/477226
Publication Date:
09/23/1975
Filing Date:
06/07/1974
View Patent Images:
Export Citation:
Assignee:
"Jaguar" Stahlwaren Vertriebsgesellschaft mbH & Co. (Solingen, DT)
Primary Class:
Other Classes:
D08/57, 30/341
International Classes:
B26B13/20; B26B13/00; B26B13/04
Field of Search:
30/254,256,260,341 81/177A
Primary Examiner:
Smith, Al Lawrence
Assistant Examiner:
Peters J. C.
Attorney, Agent or Firm:
Markva, Neil F.
Claims:
What is claimed is
1. Scissors useful particularly by hairdressers, comprising:
2. Scissors as defined in claim 1, wherein
3. Scissors as defined in claim 1, wherein
4. Scissors as defined in claim 1, wherein
5. Scissors as defined in claim 4, wherein
6. Scissors as defined in claim 4, wherein
7. Scissors as defined in claim 6, wherein
8. Scissors as defined in claim 1, wherein
9. Scissors as defined in claim 8, wherein
10. Scissors as defined in claim 1, wherein
1. Scissors useful particularly by hairdressers, comprising:
2. Scissors as defined in claim 1, wherein
3. Scissors as defined in claim 1, wherein
4. Scissors as defined in claim 1, wherein
5. Scissors as defined in claim 4, wherein
6. Scissors as defined in claim 4, wherein
7. Scissors as defined in claim 6, wherein
8. Scissors as defined in claim 1, wherein
9. Scissors as defined in claim 8, wherein
10. Scissors as defined in claim 1, wherein
Description:
BACKGROUND OF THE INVENTION
This invention relates to scissors, particularly hairdressers' scissors, comprising a moving blade having a divided handle permitting that part of the handle which forms the shank of the bow to turn in that part of the handle which forms the stock of the blade.
The thumb which is embraced by the bow of the moving blade, and which works the scissors, passes through the bow obliquely and consequently bears against one side of the inner edge of the bow when working the scissors. When scissors are thus used for a longer period of time callosities develop on that part of the thumb. These are particularly unwelcome because it is principally the back of the thumb which takes up the working pressure, and the back of the thumb is far more sensitive in this respect than its inside surface. In order to reduce this constant pressure it has already been proposed to line the inside of the bow wholly or partly with a rubber elastic material or to provide the bow with a sheath, but the results have not proved satisfactory.
Scissors have also been proposed in which the shank of the bow is turnably fitted to the pin end of the stock of the blade, or in which the shank is turnable in a socket coaxial with the stock of the blade (German Pat. No. 1,035,517). The purpose of making the bow turnable is primarily to enable the two bows to be turned over flat so that they can be conveniently carried in a case. However, turnability of the bow also permits the bow to be so adjusted that the thumb will bear snugly against the inside surface of the bow. However, since the bow is tightly fitted to the pin or into the socket and there are no additional means of fixation, the bow must be turned into the required position by special manipulation. This is awkward besides being open to the objection that when the scissors are put down, the bow may undesirably change its preadjusted position so that it requires readjustment when the scissors are picked up again. Moreover, there is also the risk that in course of time the bow will work loose on the pin or in the socket, in which case a firm connection with the blade will altogether cease to exist. In the case of scissors in which both edges of the blades are sharp it has been proposed to provide bows which can be turned through an angle of 180° and thus reversed to enable the scissors to be adapted to left and right hand use (Brit. Pat. No. 29,361/1896). In scissors of this kind the bow of the movable blade, if at all tightly fitted, can only be manually adjusted to the lie of the thumb. If the fitting is too loose it is already difficult to push the thumb through the bow. Since it is difficult to pick up scissors lying flat on a table by means of their bows, the usual way of picking them up will be by first taking hold of the blades before the thumb is pushed through the bow. Since the bow is liable spontaneously to turn by its own weight the entire procedure is a nuisance, because the bow must first be turned back into a position to fit the thumb. Another defect of such types of scissors already known in the art, particularly undesirable in the case of hairdressing scissors, is that the distance of the bows from the pivot of the blades is fixed. Since hands anatomically vary the user of scissors, such as a hairdresser, has no facilities for adjusting the scissors to his hand and his fingers in such a way that they are comfortable and convenient.
SUMMARY OF THE INVENTION
It is therefore the object of the invention so to mount the bow of the moving blade of scissors, particularly hairdressers' scissors, that it will always be in the best and most comfortable position for the reception of the thumb and easily adjustable in relation to the other bow to suit the anatomical characteristics of the user's hand.
To attain this object the present invention provides scissors, comprising a movable blade having a divided handle so that part of the handle forming the shank of a bow can be turned within an angular range of about ±30° about that part of the handle which forms the stock of the movable blade, and which contains a plurality of arresting means engageable by cooperating arresting means in said shank of the bow.
Owing to the limited turnability of the movable bow this will always be in a position when the scissors are picked up permitting the thumb to be conveniently pushed into the same without the necessity of first having to manipulate the bow into the right position. The angular range of turnability is so calculated that the inside surface of the bow will snugly adapt itself to the back of the thumb. The proposed connection between the shank of the bow and the stock of the moving blade firstly limits the turnability of the bow in a simple way and secondly it satisfactorily secures the bow to the stock of the blade. Moreover, the bow can also be axially adjusted and secured by interengagement of the arresting means. In relation to the bow of the stationary blade the bow for the thumb can thus be moved in either direction and the scissors adapted to the anatomical requirements of every hand.
In a preferred embodiment of the invention the arresting means wherein said arresting means in said shank of the bow of the movable blade is constituted by a hairpin spring having arms with off-angled free ends engaging holes in the wall of said shank, one arm of said spring being strained to form an arch which is provided with a hump adapted to engage one of a plurality of indentations in said stock of the moving blade.
The bow can thus be easily adjusted in either direction by pushing or pulling, and it will then remain in the adjusted position on the stock of the moving blade.
In an alternative form of construction the arresting means may be constituted by a screw in the wall of said shank of the movable bow, said screw being adapted to engage an indentation in said stock of the moving blade.
The bow can be adjusted by slackening the screw and then refixed in the adjusted position by retightening the screw. Moreover, the screw can also be used to control the turnability of the bow by regulating its depth of engagement with the cooperating arresting groove.
BRIEF DESCRIPTION OF THE DRAWING
Two embodiments of the invention will now be described by way of example and with reference to the accompanying drawing, in which:
FIG. 1 is an elevational view of a pair of hairdressers' scissors;
FIG. 2 is a section, on a larger scale, taken on the line II -- II of FIG. 1;
FIG. 3 is a section, on a larger scale, taken on the line III -- III of FIG. 2, and
FIG. 4 is a section of another embodiment of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1 the illustrated scissors comprises a stationary blade 1 with a bow 2 and a moving blade 3 with a bow 4. The shank 5 of the bow 2 is firmly fitted to the stock 6 of the blade 1. On the other hand, the stock 8 of the moving blade 3 extends into a cylindrical bore in the shank 7 of the associated bow 4 in such a way that the latter can be turned about the stock 8. The two blades 1 and 3 are connected by a screw 9 forming a pivot. The stock of the blade 3 is formed with a projecting finger 10 which is adapted to strike the inside of the stock 6 of the blade 1 and to limit the closing movement of the two blades.
In the pair of scissors illustrated in FIGS. 1 to 3 the shank 7 of the moving blade contains a round section hairpin spring 13; more particularly the spring is countersunk in slots 11 and 12 inside the cylindrical bore. The arms 14 and 15 of the hairpin spring 13 have off-angled ends 16 and 17 which engage holes in the wall of the shank at the bottom of the slots 11 and 12. The arm 14 is strained to form an arch containing a hump 18. The stock 8 of the moving blade 3 which is engaged by the arms 14 and 15 of the hairpin spring 13 is formed with a number of axially aligning indentations 19 for cooperation with the hump 18 of the spring 13, but so contrived that the bow 4 can still be turned within an angular range of ±30°.
It will be understood by reference to FIG. 4 that the spring could be replaced by a grub screw 20 inside the shank 7, the inner end of the screw engaging one of a number of indentations 19' in such a way that it does not prevent the bow 4 from being turned with an angular range of ±30°.
Naturally it would also be within the scope of the present invention to mount the bow 2 of the stationary blade 1 so that it can turn and be axially adjusted in the same way as the other bow 4.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments are therefore to be considered in all respects as illustrative and not restrictive.
This invention relates to scissors, particularly hairdressers' scissors, comprising a moving blade having a divided handle permitting that part of the handle which forms the shank of the bow to turn in that part of the handle which forms the stock of the blade.
The thumb which is embraced by the bow of the moving blade, and which works the scissors, passes through the bow obliquely and consequently bears against one side of the inner edge of the bow when working the scissors. When scissors are thus used for a longer period of time callosities develop on that part of the thumb. These are particularly unwelcome because it is principally the back of the thumb which takes up the working pressure, and the back of the thumb is far more sensitive in this respect than its inside surface. In order to reduce this constant pressure it has already been proposed to line the inside of the bow wholly or partly with a rubber elastic material or to provide the bow with a sheath, but the results have not proved satisfactory.
Scissors have also been proposed in which the shank of the bow is turnably fitted to the pin end of the stock of the blade, or in which the shank is turnable in a socket coaxial with the stock of the blade (German Pat. No. 1,035,517). The purpose of making the bow turnable is primarily to enable the two bows to be turned over flat so that they can be conveniently carried in a case. However, turnability of the bow also permits the bow to be so adjusted that the thumb will bear snugly against the inside surface of the bow. However, since the bow is tightly fitted to the pin or into the socket and there are no additional means of fixation, the bow must be turned into the required position by special manipulation. This is awkward besides being open to the objection that when the scissors are put down, the bow may undesirably change its preadjusted position so that it requires readjustment when the scissors are picked up again. Moreover, there is also the risk that in course of time the bow will work loose on the pin or in the socket, in which case a firm connection with the blade will altogether cease to exist. In the case of scissors in which both edges of the blades are sharp it has been proposed to provide bows which can be turned through an angle of 180° and thus reversed to enable the scissors to be adapted to left and right hand use (Brit. Pat. No. 29,361/1896). In scissors of this kind the bow of the movable blade, if at all tightly fitted, can only be manually adjusted to the lie of the thumb. If the fitting is too loose it is already difficult to push the thumb through the bow. Since it is difficult to pick up scissors lying flat on a table by means of their bows, the usual way of picking them up will be by first taking hold of the blades before the thumb is pushed through the bow. Since the bow is liable spontaneously to turn by its own weight the entire procedure is a nuisance, because the bow must first be turned back into a position to fit the thumb. Another defect of such types of scissors already known in the art, particularly undesirable in the case of hairdressing scissors, is that the distance of the bows from the pivot of the blades is fixed. Since hands anatomically vary the user of scissors, such as a hairdresser, has no facilities for adjusting the scissors to his hand and his fingers in such a way that they are comfortable and convenient.
SUMMARY OF THE INVENTION
It is therefore the object of the invention so to mount the bow of the moving blade of scissors, particularly hairdressers' scissors, that it will always be in the best and most comfortable position for the reception of the thumb and easily adjustable in relation to the other bow to suit the anatomical characteristics of the user's hand.
To attain this object the present invention provides scissors, comprising a movable blade having a divided handle so that part of the handle forming the shank of a bow can be turned within an angular range of about ±30° about that part of the handle which forms the stock of the movable blade, and which contains a plurality of arresting means engageable by cooperating arresting means in said shank of the bow.
Owing to the limited turnability of the movable bow this will always be in a position when the scissors are picked up permitting the thumb to be conveniently pushed into the same without the necessity of first having to manipulate the bow into the right position. The angular range of turnability is so calculated that the inside surface of the bow will snugly adapt itself to the back of the thumb. The proposed connection between the shank of the bow and the stock of the moving blade firstly limits the turnability of the bow in a simple way and secondly it satisfactorily secures the bow to the stock of the blade. Moreover, the bow can also be axially adjusted and secured by interengagement of the arresting means. In relation to the bow of the stationary blade the bow for the thumb can thus be moved in either direction and the scissors adapted to the anatomical requirements of every hand.
In a preferred embodiment of the invention the arresting means wherein said arresting means in said shank of the bow of the movable blade is constituted by a hairpin spring having arms with off-angled free ends engaging holes in the wall of said shank, one arm of said spring being strained to form an arch which is provided with a hump adapted to engage one of a plurality of indentations in said stock of the moving blade.
The bow can thus be easily adjusted in either direction by pushing or pulling, and it will then remain in the adjusted position on the stock of the moving blade.
In an alternative form of construction the arresting means may be constituted by a screw in the wall of said shank of the movable bow, said screw being adapted to engage an indentation in said stock of the moving blade.
The bow can be adjusted by slackening the screw and then refixed in the adjusted position by retightening the screw. Moreover, the screw can also be used to control the turnability of the bow by regulating its depth of engagement with the cooperating arresting groove.
BRIEF DESCRIPTION OF THE DRAWING
Two embodiments of the invention will now be described by way of example and with reference to the accompanying drawing, in which:
FIG. 1 is an elevational view of a pair of hairdressers' scissors;
FIG. 2 is a section, on a larger scale, taken on the line II -- II of FIG. 1;
FIG. 3 is a section, on a larger scale, taken on the line III -- III of FIG. 2, and
FIG. 4 is a section of another embodiment of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1 the illustrated scissors comprises a stationary blade 1 with a bow 2 and a moving blade 3 with a bow 4. The shank 5 of the bow 2 is firmly fitted to the stock 6 of the blade 1. On the other hand, the stock 8 of the moving blade 3 extends into a cylindrical bore in the shank 7 of the associated bow 4 in such a way that the latter can be turned about the stock 8. The two blades 1 and 3 are connected by a screw 9 forming a pivot. The stock of the blade 3 is formed with a projecting finger 10 which is adapted to strike the inside of the stock 6 of the blade 1 and to limit the closing movement of the two blades.
In the pair of scissors illustrated in FIGS. 1 to 3 the shank 7 of the moving blade contains a round section hairpin spring 13; more particularly the spring is countersunk in slots 11 and 12 inside the cylindrical bore. The arms 14 and 15 of the hairpin spring 13 have off-angled ends 16 and 17 which engage holes in the wall of the shank at the bottom of the slots 11 and 12. The arm 14 is strained to form an arch containing a hump 18. The stock 8 of the moving blade 3 which is engaged by the arms 14 and 15 of the hairpin spring 13 is formed with a number of axially aligning indentations 19 for cooperation with the hump 18 of the spring 13, but so contrived that the bow 4 can still be turned within an angular range of ±30°.
It will be understood by reference to FIG. 4 that the spring could be replaced by a grub screw 20 inside the shank 7, the inner end of the screw engaging one of a number of indentations 19' in such a way that it does not prevent the bow 4 from being turned with an angular range of ±30°.
Naturally it would also be within the scope of the present invention to mount the bow 2 of the stationary blade 1 so that it can turn and be axially adjusted in the same way as the other bow 4.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments are therefore to be considered in all respects as illustrative and not restrictive.