US2519992A - Detachable plane handle - Google Patents

Description

1950 A. ZETTERMAN 2,519,992

DETACHABLE PLANE HANDLE Filed Feb. 21, 1948 INVENTOR.

AXEL L.- ZETTERMAN BY W Patented Aug. 22, 1950 UNITED STATES PATENT OFFICE 2,519,992 I t I a DETAOHABLE I?LANE,HANDLE Axel L. Zetterman, New Britain, an. Application February 21, 1948, Serial No. 10,110

This invention relates to plane handles, and more particularly to a device for removably securing a plane handle to the sole plate of a bench plane.

One object of this invention is to provide a device of the above nature which includes a wedging means for removably securing the handle tightly against the sole plate of the plane.

Another object is to provide a device of the above nature in which the wedging means may easily be secured and released by the operation of a single screw, whereby the attachment of the handle will be simplified and facilitated.

Another object is to provide a device of the above nature in which the wedging means is adjustable so that variations in the manufacture of the parts may be compensated for.

Another object is to provide a device of the above nature in which the wedging means includes a screw which is forwardly and upwardly inclined, whereby it will be substantially aligned with the force applied thereto by the plane handle.

A further object is to provide a device of the above nature which will be simple in construction, inexpensive to manufacture, easy to assemble and manipulate, compact, ornamental in appearance, and durable in use.

With these and other objects in view there has been illustrated in the accompanying drawing one form in which the invention may conven iently b embodied in practice.

In the drawings:

Fig. 1 is a side elevation of a bench plane, shown partly in section, to illustrate the improved handle securing device.

Fig. 2 is a fragmentary sectional view of the same on an enlarged scale.

Feb. 3 is a fragmentary bottom view of the rear portion of the plane handle.

Fig. 4 is a sectional view taken on the line i# of Fig. 2, and illustrating the shape of the rear anchor screw.

Referring now to the drawings, in which like reference numerals denote corresponding parts throughout the several views, the numeral I indicates generally a carpenters bench plane provided with the usual sole plate II which carries a front handle 52, a cutting blade I3, and a rear curved handle Hi. The rear handle I4 has a conventional exterior shape and is preferably made of pyroxylin, a material which is tough and durable,and lends itself readily to machining. The fiat bottom surface of the rear handle I4 is formed with a deep central cavity I5 which has 4 Claims. (:01. 1 45,19) 1 the shape of a key-hole slot, thereby providing a wide forward circular and upper oblong portion I6 and a narrow rear portion H. The sides of the narrow portion I! are formed by inclined shoulders I8, l9. The wide portion I6 of the cavity i5 is of a width to freely receive the head 253 of an anchor element in the form of a T- headed screw 2!, which is mounted in a forwardly-inclined and upwardly extending tapped aperture 22 in the upper surface of the rear portion of the sole plate I I.

It will be understood that the wide cavity portion I5 extends rearwardly above the inclined shoulders I8, I9 so that the handle I4 can he slid forwardly to bring said shoulders l8, I9 into engagement with the screw head 20.

The upper surface of the sole plate I I is recessed adjacent the inclined aperture 22 in order to provide an inclined seat 23 for a lock nut 24 on the screw 2!.

The sides of the narrow cavity portion I! are cut away below the shoulders I8, I9, thereby forming a groove 25 to provide clearance for the lock nut 24, and permitting the handle I4 to seat against the sole plate II. The handle I4 will be detachably maintained in tight wedging engagement with the screw head 20 by means of a screw 26 passing through the front portion of the handle I4, and secured in a tapped vertical aperture 2'! in the sole plate II.

Operation In operation, the T-headed screw 2I will be inserted in the inclined aperture 22, and adjusted to bring its head 20 into a crosswise position at the correct elevation above the sole plate II, whereupon the lock nut 24 will be tightened.

The handle M will then be applied by bringing the wide portion I6 of the slot I5 down over the head 2!], and sliding the handle I4 forwardly, whereby the shoulders I8, I9 will engage under the head 20 to wedge the handle l4 tightly against the'sole plate II.

The screw 26 will then be inserted downwardly through the handle and into the aperture 21, whereby the wedging engagement of the head 20 will be maintained.

It will be understood that whenever the screw head 20 requires adjustment either because of variations in manufacture or for any other reason, the handle I i will be removed and the screw 2! adjusted longitudinally in the aperture 22, the lock nut 24 then being turned down so that the screw 2| cannot turn accidentally during the assembly operation.

While there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosure, but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming ithin the scope of the following claims.

Having thus fully described the invention, what is claimed as new, and for which it is desired to secure Letters Patent, is:

1. In a plane having a sole plate, a T headed anchor element on the upper surface of said sole plate, a plane handle having a cavity adapted to receive the head of said anchor element, said cavity entering only through the lower surface of said handle and being provided with a pair of internal parallel inclined shoulders at opposite sides of said anchor element. and means for securin said inclined shoulders in wedging en, easement under the h ad of said a h r element. whereby sa d handle will be firm y a tached t said sole plate.

2, The invention as defined in claim 1, in which an inner portion of said cavity has the shape of a key hole slot, said inclined shoulders forming the narrow portion of said slot.

3. The invention as defined in claim 1, in which said anchor element has a threaded stem mounted in a tapped aperture in said sole plate, in which an inner portion of said cavity has the shape of a key-hole slot, and said inclined shoulders form the narrow portion of said slot, whereby the head of said anchor element may enter said wide portion of said slot and move rearwardly over the narrow portion thereof.

4. The invention as defined in claim 1, in which said anchor element is a T-headed screw secured to said sole plate on an axis which is substantially at right angles to said inclined shoulders.

AXEL L. ZETTERMAN.

REFERENCES CITED The following references are of record in the tile of this patent:

UNITED STATES PATENTS Number Name Date 139,0 1. Greene .Oct. 21, 18 1 769,668 Winkie July 1930

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