US1723756A - Adjusting scissors element - Google Patents

Description

Patented 6, 19.11;.

UNHTED STATES PATENT OFFICE.

WILLIAM A. ZEIDLER, OF NE'W' YORK, N. Y., ASSTGNOBJ T0 IIURLBUET EESEARCH COR- IORATION, OF NEW YORK, II. '55., A CORPORATION OF DELAWARE.

ADJUSTING EECISSOEFS ELEMENT.

Application filed August 18, 1926. Serial. No. 125,930.

This invention relates to a means for ad justing scissors so that the scissors blades may always be brought into proper position of alignment, either at the time of manut'acture or as grinding is made necessary.

Adjusting elements generally, are not new in the art for such purposes. So far as known to applicant, there is no adjusting device which is not liable to distru'bance, that is, loosening and thus giving il'nperiect adj ustment when the scissors are in use.

The present invention is therefore directed in its object toproyide a simple and eilicacious means for providing an initial adj ustment and maintaining it.

Referring to the drawings:

' re 1, is an illustration of a pair of sci is with an adjustmentapplied.

Figure 2, is an enlarged view in tragmentary form more clearly illustrating the features.

Figure 3, is a similar view showing the two elemental parts in opposed plan view.

Figure 4, illustrates a slight modification ot the engaging clement.

Figure 5, illustrates the engagin elements in a further modification.

The adjusting device isapplicable to shears and scissors of whatever type that is in common use. It is specifically illustrated herein, wherein the blades or cutting members of the shears or scissors are made removable and renewable.

This illust'ation shows the ultimate in the requirements for accurate and continued adjustments and lcadjustments.

In the ordinary scissors, grinding of course, from time to time, makes it necessary to ellect adjustment of the scissors elements so that the blade portions will register properly and the device is perfectly adapted to take care of such adjustments as are necessary.

In the case of removable and renewable cutting blades for scissors, it is quite apparent that While the elements may he made with great perfection, the slightest micrometer difference is sul'licient to require the greatest care in assembling.

In this assembling operation, there is always the fallacy of human inaccuracies, that is,tl1e forcing of parts which necessitates adjustment before ever a perfect article assed for market.

'ihe present invention, the

a lo double purpose. It gives any and all necessary adjustments and it pro'vic es a means will be as perfect as that of the more expert artisan employed in producing goods.

The device is very simple, is somewhat un que, in its form and application.

it is illustrated as applied at the rear of the linger openings of the scissors elements A, B, which as usual, are pivoted on a usual pintle as at C, and have removable blade elements D. I

At the rear of the linger openings 1, 2, are extensions 3, -l. The extension 4, as'illustrated in Figures 1 2, 3, has a transverse angular groove or opening or depression 5. This obviously may be formed transversely to the central plan of the scissors or at right angles to said plane, or in fact, at any angle. (lo-operating with this angular opening 5, is an adjusting screw 6, which, at its end 7, is

chamtered, milled or otherwise formed to conform to the angular opening 5.

In any event, it is so formed that its angular sides always strike the sides of the angular opening 5, seating there against.

This device re uires no locknuts or other means for prove he; turning of the screw as it may be made with a line thread and upon becomes practically a,

a 180 adjustme t micrometer in its striking action against the opposed angular groove ol the opposed elemont 4-.

The operation of adjustment is quite obvious. hen the elements and their blades are secured by a pintle, the screw 6, is turned and the scissors elements brought to the strike point until the cutting blades readjust with prec1s1on.

This is all that necessary, inasmuch as in the opening and closing movements of the scissors elements, the engaging angular elements will always come to the strike point and hold the adjustn'ient.

It is quite apparent that the screw will not loosen sulliciently to turn over 180, it at all, during the opening movement of the scissors. Therefore, as the scissors are closed, each closing movement will bring it back to A 17 adjusted position {in the event of its having for any reason been moved). Thus. there is no requirement for a locked adjustment of the screw (3.

Of course, modifications might be developed along this general line which would accomplish the une general result and I have, therefore, illustrated in Figs. l and-5, what might be termed alternative structures or structures having a reversal of parts. For instance, in Figure t a pyramid Shaped opening 8, is illustrated in one element, with a truncated pyramid form 9, on the end of the opposed adjusting screw. Obviously, this may be adjusted to 90 in precision.

Again in Figure 5, the indentation in the element consists of a transverse groove 10, having a central angular projection 11. He agaim the engagement is ctl'ected wit-b a similarly termed end having a groove 12, and angularly formed sides 13, provided at the end of the adjusting screw 6.

These modifications might be carried forward in various forms, but the important requirement in any form is that. the strike or articulation between the can of the adjusting screw member and the opposed surface shall be such as to cause registration and pre vent a turning movement of the screw when the parts are in registration.

In other words, should the screw be slightly changed in its position with the scissors open, it will immediately come back to registration of the initial ad ustment when the scissors are again closed. This feature is important as it obviates the necessity of any locking devices for the adjusting elements.

It is quite obvious that not only the 1nodifications illustrated, but others having two opposed strike surfaces in the adjustment devices which ill maintain adjustment and aligmncnt at each. striking movement of the scissors elements, should properly tall within and be contemplated by the invention described.

hat I claim as my invention and desire to secure by Letters Patent is:

1. An adjusting device for scissors comprising an angular groove in one scissors element an adjustable screw in the opposed element, said screw having an angular face at its end for engagement with the groove of the opposed element.

2. An adjustingdevice for scissors comprising an angularly formed depression in the face of one element of the scissors and a cooperatively arranged angular-1y itacei'l menu ber tor the opposite scissors element, one of said elements being adjustable with reference to the angle of the opposed elemcn;

3. A combination in a pair of scis'ors, an extension from each element ot the scissors, an angular depression in one of said elen'ients and adjustable means in the opposite element for torming an articulating strike between the elements at any desired adjusted position thereof.

4. An adjusting device for scissors coinprising one scissors element having a depression of angular torm, providing a strike surt'acc a second scissors element having a freely adjustable strike member with its striking end conforming to the angularly formed depression of the first named scissors element, whereby the adjustable member will be maintained in any given adjustment through its repeated engagements with the depression of angular form.

WILLIAM A. ZEIDLER.

Images