US1858169A

US1858169A - Electric fender tool

Info

Publication number: US1858169A
Application number: US531821A
Authority: US
Inventors: Pesola Niilo
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-04-21
Filing date: 1931-04-21
Publication date: 1932-05-10
Anticipated expiration: 1949-05-10

Description

May 10, 1932. N. PESOLA fi J ELECTRIC FENDER TOOL Filed April 21, 1931 2 Sheets-Sheet l 2 Sheets-Sheet 2 Filed April 21. 1931 INVENTOR Iiatented May id, 1932 NIILO rssom, or :rrrcneune, mssAcErrsErr-s nnncmo rnnnnn moor.

Application filed April 21 1981. Serial No. 531,821.

This invention relates to an electric tool and more particularly to a tool designed for use in straightening sheet metal, especially automobile fenders radiators, or other sheet metal parts thereo The primary object of the invention is the provision of a tool of this character, wherein the frame thereof is of novel construction so that the sheet metal work can be received or introduced thereinto, whereby on the working of the tool any irregularities in the surface, such as kinks or bends in the work, can be conveniently eradicated or removed.

Another object of the invention is the pro- 135 vision of a tool of this character, wherein the frame thereof is constructed so that an electric drill with its chuck can be conveniently carried upon the frame whereby the power from the drill can be utilized for operating the tool, which is designed especially for straightening sheet metal, such as automobile fenders, radiators, or other metal body construction of the automobile.

A further object of the'iuvention is the provision of a tool of this character, wherein the hammer and the anvil are re'movably supported to permit different types or styles to be interchanged according to the kind of work to be performed by the tool in the use 39 thereof.

A still further object of the invention is the provision of a tool of this character, wherein the hammer is equipped with a cushion or compensating spring which eliminates undue strain upon the moving parts of the tool and also acts as a shock absorber therefor.

A still further object of the invention is the provision of a tool of this character which is extremely simple in construction, thoroughly reliable and elhcient in operation, strong, yet light of weight so that the same is readily portable, durable and inexpensive to manufacture.

15 With these and other objects in view the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described in detail, illustrated in the accompanying 5e drawings which disclose the preferred embodiment of the invention and pointed out in the claim hereunto appended.

In the accompanying drawings:

' Figured is an elevation of the tool constructed in accordance with the invention.

Figure 2 is a top plan view thereof.

Figure 3 is an end elevation of the tool looking toward the open or mouth end of the frame.

Figure 4 is a View similar to Figure 3 looking toward the other end of the tool.

Figure 5 is an enlarged fragmentary longitudinal sectional view taken through the hammer of the tool.

' Figure 6 is a fragmentaryvertical sectional view taken through the eccentric and its-connection with the hammer of the tool.

Figure 7 is an elevation of a modified form of hammer mounting and its hammer.

Figure 8 is an edge elevation thereof. 7

Some of the reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, the tool comprises a frame A, preferably made from metal, although the same may be made from any other material found desirable and is of substantially C-shape in contour, presenting at one end an open mouth B what may be termed the work entrance to the frame. 30 The upper stretch 10 of the frame A has formed longitudinally thereof a sleeve like hearing 11 in which is fitted a power shaft 12 carrying at its end over the mouth or entrance B of the frame A an eccentric 13 pro- 35 vided with a wrist pin 14 adjustably engaged at its head 15 in a slot or groove 16' in said eccentric, the connection between the head and said eccentric being dove-tailed and the pin 14 is locked in adjusted position on the eccentric by a nut 17, thus it being seen that said pin can be adjusted relative to the center of the eccentric to vary the throw or stroke of the tool in its operation.

Engaged on the pin 14 is a link 18 which latter is also pivoted at 19 to a hammer C working through a guide head in the form of an eye 20 at the entrance or mouth B of the frame A, the head 20 being formed at the free end of the upper stretch l0 of said frame and the hammer C will be hereinafter more fully described.

The lower stretch 21 of the frame A at the mouth or entrance B supports a detachable anvil 22 which confronts the hammer C and coacts therewith in the working of the tool.

At the closed end of the frame A is arranged an adjustable bracket 23 having a saddle 24, the bracket being slidably connected with the frame A and is held adjusted thereon by a set screw25. Adapted to be placed within the saddle 24 is the motor casing 26 of an electric drill of a standard type having arranged in a handle 27 a trigger switch 28 for controlling the electric motor of said drill as provided in the casing 26 thereof. The drilling shaft 29 of said drill carries the chuck 30 designed for detachable coupling of said drill with the power shaft 12 on the frame A of the tool so that when the drill is operated its power will be transmitted to shaft 12 to the hammer C as will be obvious. The motor casing 26 of the drill is held in the saddle 24 by means of a clamp yoke 31. thus it being obvious that the drill may be detached at will on the release of the clamp 31 and uncoupling of the chuck 30 with the shaft 12 of the frame A and such drill utilized as such.

The hammer C includes a hammering head 32 having a chamber 33 therein in which works a plunger 34. the latter being anchored upon by interposed cushion or compensating springs 35 and 36, the head 32 being retained on the plunger by a closure cap 37 for the chamber 33, the plunger being connected by the pivot 19 with the link 18. The hammer when reciprocated will relieve strain and absorb shocks and jars through the use of the springs 35 and 36 in the head 32 of said hammer. which head delivers the blow or successive blows to a piece of Work when resting upon the anvil 22 of the tool in the operation of the latter.

In Figures 7 and 8 there is shown a modification of the invention, wherein the hammer head 38 is of a solid formation and through the medium of a coupling 39 carrying a multiple cross spring 40 is yieldably suspended from an upwardly arched multiple compensating spring 41 which carries at its ends links 42, these being connected with the cross spring 40 of the coupling 39. The spring 41 carries medially thereof a wrist pin engaging block or coupling head 43 for engaging with the wrist pin 14 on the eccentric 13 of the tool. The mounting of the hammer 38 of the solid type, as is illustrated in F igures 7 and 8 of the drawings when the tool is operated, will take care of shocks and jars and the said springs 40 and 41 will act as compensating springs corresponding to the spring 35 and 36 in the head 32 of the hammer C hereinbefore described.

The eccentric 13 is provided with a balanced weight 44.

It will be apparent that the saddle 24 can be regulated with relation to the frame A of the tool to properly align the shaft 29 of the drill and the shaft 12 of the tool for the coupling of these shafts by the chuck 30 on the drill.

The work to be operated upon by the tool is introduced through the mouth or entrance B in the frame A of said tool and in the operation of the tool the work is acted upon by the hammer C coacting with the anvil B to enable the straightening of sheet metal material, especially automobile fenders, radiator shells or the like.

The anvil 22 is detachable so that different styles of anvils may be mounted in the frame A of the tool according to the kind of work to be operated upon thereby.

It is contemplated within the scope of the invention that the power shaft 12 may be con- IlPLtGd through the medium of a suitable flexible cable with an electric motor not carried by the tool as is the case with the electric drill and in this way power from the electric motor positioned at any point removed from said tool will transmit motion to the tool for the operation thereof. In other Words, the electric drill can be detached from the frame A of the tool and located stationarily away from the sanie, then through a suitable flexible connection with the shaft 29 the said electric drill power can be transmitted therefrom to the hammer head 32 of the tool as will be obvious.

\Vhat is claimed is:

A tool of the character described comprising a substantially C-shaped rigid frame presenting a nose opening between its ends, a bearing sleeve formed at the uppermost portion of said frame, a power shaft journaled in said sleeve, an anvil removably fitted on one end of the frame at the nose opening, a yieldable hammer mounted on the other end of the frame and coactive with the anvil, an eccentric connection between said hammer and said power shaft, a saddle adjustably connected with-the frame opposite the entrance opening, and driving means clamped in the saddle and operatively connected with the power shaft.

In testimony whereof I afiix my signature.

NIILO PESOLA.