US2607379A - Soft metal hammer - Google Patents

Description

Aug. 19, 1952 F. PlAMPlANO ET AL 2,607,379

SOFT METAL HAMMER Filed Aug. 4, 1950 INVENTOR. FRANK P/flMP/ANO, ARTHUR H. BENNE 77;

BY 772.9%? 9W 4 TTOQ/VE Y5.

Patented Aug. 19 1952 l H me sor'r MurALfnAMMsn 1 Frank Piampiano, Lake mat-inmate ArthurH. Bennett, Livingston, N. J.,"ass'ignors, by direct andmesne assignments, to Last-Long SafetY Hammer 00., Orange, N'.-J'.,":a corporation'iof NewJersey 4, 1

Application August 4, 1950, Serial N0, 177,672 v 2 Claims. (Cl. 145-36) This invention relates 'to improvements in hammers, and more particularly to an improved hammer head, the primary object of the invention being to provide a hammer head which eliminates or reduces damag to other metals hammered therewith and prevents production of sparks while hammering.

Another important object of the invention is to provide a more practical and more efficient metal working hammer head of the character indicated above composed of copper alloy and having cavities therein at opposite sides of and spaced from the handle receiving eye thereof and located in the opposite ends of the head, in which are positioned spring inserts which act to prevent spreading of the faces of the hammer in use which otherwise would occur due to the nonresilient character of copper.

Other important objects and advantages features of the invention will be apparent from the following description and the accompanying drawings, wherein, merely for purposes of illustration herein, a specific embodiment of the invention is set forth in detail.

In the drawings, wherein like numerals designate like parts throughout the several views:

Figure l is a top plan view,

Figure 2 is an end elevation,

Figure 3 is a longitudinal section taken on the line 3-3 of Figure 1, and

Figure a is a transverse section taken on the line 4-4 of Figure 3.

Referring in deta'l to th drawings, the illustrated hammer head is preferably composed of from 94% to 96% copper, 2% to 3 /2% silicon, and /2% of tin. The hammer head consists of a solid body 5 of copper alloy having a substantially square middle portion 6 through which extends the handle receiving eye 1 opening through the top and bottom surfaces 8 and 9 respectively, of the middle portion 6, and tapering Each end portion M' is hollow, being formed with a square cavity or chamber it which'is centralized with respect to the sides and tops and bottoms of the endportions It, but are closer to the eye-T'than to the outer ends iii of the end portions, as indicated in Figures 3 and-" l. The size and arrangement of the chambers 16 are such that the end portions [4 while hollow, are characterized by heavy, relatively rigid walls supporting the outer ends l5.

The longitudinally inward ends 11 of the chambers it are formed with access openings l3 communicating with the eye 1 through which a spring insert i9 is passed into each chamber.

The spring inserts iii are similar, each being a hat ribbon steel form comprising a straight b ight portion 20 from whose opposite ends extend legs each involving an inwardly angulated portion 2! terminating in an outwardly angulated portion 22, the portions 2| and 22 being the same in length. The spring inserts are adapted to be inserted into the chambers it by passing their h ight portions 20 through the access openings l8 from the eye, followed by the legs in compressed position. As the legs pass the access openings i8 they spring apart so that the terminal ends or edges 23 of the leg portions 22 engage the inner ends H of the chambers on opposite sides of the access openings IS, the length of the legs being such that the legs then press the bight portions 20 against the outerends 2d of the chambers. As a result, the spring inserts l9 act as resilient supports backing up th outer ends l5 of the end Hi of the hammer head, which prevent undue flattening and spreading and other permanent deformation of the end portions it as a result of hammering upon other metal objects which would otherwise take place due to the plasticity of the copper material.

It is to be noted that positioned in the chambers i6 the spring inserts l9 are from the top surface 8 to the bottom surface 9.

Extending at right angles to the eye 1 are centered and aligned bores H] which open through the oppos'te sides I l of the middle portion 6 and accommodate a preferably brass pin I2 to hold the handle (not shown) in place in with their legs in the vertical plane of the hammer head body 5, which is coincident with a plane passing through the eye 1 and hence through an associated handle (not shown), the spring inserts 19 thereby being arranged to resist such distortions of the eye 1. the head ends as naturally occur in the swing- The hammer head body 5 has similar end poring of the hammer head in a general lplane passtions M which are square in transverse cross secing through the handle and the longitudinal axis tion and tapered uniformly from the middle portion 6 to their outer ends IS. The outer ends l5 are plane and smooth and are positioned at right angles to the longitudinal axis of the body 5.

of the hammer head, as one of the ends It strikes the work at an angle or otherwise than flush with the work.

The relative softness and yielding character of a hammer head constructed as above deiron onsteel hammer.

What isvnclainied" is: g 1. In a hammer head, a copper body having terminating in a striking face, said end portion engagandelegs extending from said ;bight portion and bearing againstzan opposite qend of said chamber.

'2. In a hammer V an: end terminating ina striking 'face, said end being normally subject to inwardmdistortion when; said striking face,1-is hammered against-a i-ng said end Wall and legs resistant object, a chamber formed in said end in spaced relation to the sides of said end and to said striking surface, and a spring insert conunder tension and serving end wall therebetween, said spring insert comprising a lbight portion engagextending from said bight portion and bearing accommodating eye and .being formed with an access opening. extending adapted "torberinserted into said chamber.

FRANK PIAMPIANO. ARTHUR, H. BENNETT.

REFERENCES CITED 7 The following references are of 7 record. inrthe "File of .this patent:

UNITED STATES PATENTS Name Date Gallant (Aug. 15,1944

umber 2,355,641

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