US1615882A - Shears - Google Patents

Description

Feb. 1,1927. 1,615,882

l C. E. LUEDTKE SHEARS Filed Jan. 18, 1926 www5/MM5@ i Patented Feb. 1, 1927.

nniTsn STATES raisers PATENT orties.

CHARLES E. LUEDTKE, F CHATFIELD, MINNESOTA, ASSIGNOR OF ONE-HALF TO OTTO C. BENSON, 0F MINNEAPOLS, MINNESOTA.

N sHnAns.

Application filed January 18, 1926. Serial No. 81,984. i'

This invention relates to shears and particularly to barber shears.

It is an object of this invention to provide a pair ot' shears having a pair of blades releasably securable thereon.

Another object of the invention is to provide a pair of shears having means thereon Jtor securing interchangeable blades thereto.

It is still another object of the invention to provide a pair of shears having means thereon for adjustably limiting the closing movement of the shears.

A further object of the invention is to provide a pair of shears having linger portions thereon which will conveniently accommodate the hand of the operator when using the device.

yihese and other object-s and advantages oi the invention will be fully set 'torth in ihe following description made in connection with the accompanying drawings in which like reference characters refer to similar parts throughout the several views and in which:

Fig. 1 is a plan view of the device showing al pair ot' blades secured in working position;

Fig. 2 is a partial plan view ot the device showing one of the blades partially secured and another blade ina position to be secured;

Fig. 8 is a section taken on the line 3 3 ot Fig. 2, as indicated by the arrows;

Fig. 4 is a plan view of one type of blade used;

Fig. 5 is a perspectivev view of another type ot blade; and

Fig. 6 is a perspective view of the blade securing portions ot' one of the body members. f

The two body members ot a pair of shears are indicated by the letters A and B, pivoted together at intermediate portions, by means ot pivot 7 and having handling portions and f) respectively, and similar blade holding portions 10. Ylandling portion 8 has formed at its outer end the thumb receiving portion. 8, while handling portion 9 has termed therein adjacent its outer end, the finger receiving portion 9a and at its extreme end the inger accommodating portion 9b. Handling portion 8 is of greater length than handling portion 9, .so that finger receiving portion 9a is more distant from pivot 7 than thumb receiving portion 8a,

Adjacent the pivot 7 opposing shoulders 8c and 9C are formed on handling portions 8 and 9, one of which, as 9C, has a threaded recess adapted to receive the adjustable stop screw 11. Y

rlhe blade holding portions 10 each have inwardly extending shoulders 10a forming longitudinal recesses thereon. rllhe opposing edges ol. the 'recesses have longitudinal grooves 10b termed therein, the outer ends oi' the portions 10 term right angles with the opposing respective edges of the recesses and have the tenons l0o projecting outwardly therefrom.

ing inwardly at an angle to said mortises.

Blades 13 are provided each having a cutting edge 13a, an arrow shaped tip 13b,

the single barb of which Jforms the shoulder 13C. Each blade has an outwardly project 7 having smooth cutting edges, 18a, blades i having any type ot cutting edges may be used such as, tor example, the blade shown .in Fig. 4:, having corrugated cutting edge 14.

Operation.

A cutting blade 13 is secured to a blade holding portion 10 by inserting the tongue 18(1 of the blade within the groove 10b and sliding the blad-e inwardly on portion 10 until the tenons 1()C and lilf are seated within their co-operating mortises. lin this position the shoulder 10d; will abut the inner end ot the blade 1 3 and the shoulder 13 will abut the outer end ot' portion 10. Set screw 12 may now be tightened against the tenen 13f to securely anchor the blade on the portion 1.0. A blade having been anchored upon each of the blade securing portions 10 of members A and B, the shears'are ready for use. The shears can now be grasped with the thumb of the operator eX- tending through the thumb receiving portion 8a ot the member Ay and one of the middle lingers of the operator extending through the finger receiving portion 9a of the mem- Shoulders 10*l have mortises V 10b formed therein and set screws 12 eXtendilliber B' and an adjacent finger fitting Within the notched linger' receiving portion 9b. As the linger receiving portion 921 is farther distant from the pivot 7 tha-n the thumb receiving portion 8a on portion 8', it can bel seen that the operator can conveniently grasp the members A and B in a natural position. Set screw l2 can be adjusted to limit the closing movement of the members 7 and 8 so that the extreme points 13b of the blades in use Vwill exactly meet when the shears are in closed position.

Whenit is desired to remove the blades 13 for sharpening or to substitute other blades therefor, of different` type, set screws `2l2`may be loosened and the blades slidably removed. sharpened or different types of blades may then be substituted in place `of the old blades on the blade holding portions l0, and-the shears will again be ready for use.

lt can be seen that with applicants device the: shears can be kept continuously in use While the blades thereof are being sharpened or different types of blades can be used in the same device Without the necessity of providing. a different type of shears for every different type of blade used.

The parts of the device are simple and may be easily and inexpensively constructed. The device has been amply demonstrated and it hasbeen found to be very useful for the purposes set forth.

1t Will, of course, be und-erstood that various changes may be` madek in' the form', details, arrangement and proportions of the parts Without departing from the scope of applioants invention, which, generally stated, consists in the matter shown and described an'd set forth in the appended claim.

l/Vhat is claimed is:

A pair of shears comprising intermediately pivoted members having blade holding portions with shoulders adjacent their pivot, longitudinal mortises formed on the opposing surfaces of saidportions extending outwardly from saidfshoulders, the outer ends of said portions being angularly cut to the mortised surfaces, and detachable blades having longitudinal tenons thereon adapted to engage in said'mortises, the inner ends adaptedto abut against the shoulders of said blade holding portions, said blades having shoulders adjacent their outer ends adapt-ed to abut' against` the outer ends of said por tions, the abutting shoulders and ends of said blade holding portions and blades having coo1; eratingv mortises and tenons.

In testimony whereof I affix my signature.

CHARLES E. LU EDTKlv-"

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