US1079148A - Magnetic pick-up for riveting-machines. - Google Patents

Description

D. G. SASSEMAN. MAGNETIC PICK-UP FOR RIVE'IING MACHINES.

APPLICATION FILED FEB.23, 1012.

Patented Nov. 18, 1913.

Fla V4 III --L/ ll r r llll' \waj J66 m gm UNEZTEU @iilrtillliiltii DAVID C. SASSEMAN, O1 RIVER liOlEtESfll, ILLINOIS. .f'

FACTURING COMPANY, OF CHICAGO, ILLINOIS, it COBLPOEE "il tOiit FlttilEv SSIGNOF TO 1 H. $l flfITI-3f ll'l'ANU- i ION OT." ILLINOIS.

MAGNETIC PICK-UP HIV]?TING--MACHINES.

LOWDJAW).

To all QU/LOHL it may concern Be it known that I, DAVID C. tiassmiax, a citizen of the United States, residing at River Forest, in the county of (Tool: and State oit Illinois, have invented certain new and useful Improvements in hlagnctic Pick- Ups t'or liiveting-lviachines, (it which the following a specification, reili'erence being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide an improved pick-up device for positioning rivets or like fittings in a riveting machine.

It consists of the elements and features oil construction described and shown in the drawings as indicated in the claims.

In the drawings:liigure 1 is a side elevation partly in section of a riveting machine fitted with a device embodying this invention. Fig. 2 is a detail view in section showing a modified form of the device. Fig. 3 is a detail section taken as indicated at line 3--3 on Fig. 2.

The riveting machine or hammer shown in Fig. 1 comprises a familiar form of C- shaped frame, A, carrying a clenching anvil, B, on its lower arm and a. plunger, O, in its upper arm, mounted for reciprocation toward and from the anvil, B. The upper end of the plunger, 0, is provided with a wearing shoe of hard metal, I), upon which the operating cam, E, bears, and against the under side of which a returning spring, F, operates. The body of the plunger C composed of brass or some other non-mag netic metal and has inserted into its lower end a magnet, G, which constitutes the pickup device for the rivets which are to be used in the machine. By virtue of a slot, G extending throughout the greater part of the length of the magnet, G, and also by reason of the method of magnetization the said magnet is of the horse-shoe or double pole type, having its two opposite poles, G G in close proximity but separated by a small air gap at, G As will be well un derstood, the efficiency of this type oili magnet is much greater than that ol the more usual bar magnet employed tor this purpose, in which only one of the poles is put to work; in consequence of this arrangement the entire pulling power of the magnetic force stored in the magnet, G, is exerted upon any object applied to the poles. Pref- Specification ot Letters Patent.

Application filed Fehruary 1912.

'intrntcd Nov. lei, wit-i.

Serial No. 6793 10.

rably though not necessarily, the slot, G, is made considerably wider thrimghout the greater part ol' its length than in the \i(lll' ity oi the poles. (t, (i This re ults in an intensification oi the in gnelic licld in the vicinity o'l lhc poles by reason ol the reduccd air gap, ii, at this point which attords the path oi least resistance to the passage cl the magnetic lines o'li Force as compared with all other possible paths. Although the plunger with its magnet, (i, moves in a guide-way ot the magnetic iron trance- A, the lllichncs's oi, the insulating walls, t), oil the non-magnetic plunger, C, is such that only by traversing the air gap, (:i, will the lines o'l? force encounter the minimum of non-huurnelic medium. Thus when a steel rivet such as that imlicated at, H, is brought within the llcld, o'l inllucncc ol' the magnet, (i, it is readily and :-=trongly attracted thereby and will remain in contact therewith until the riveting operation is cinnpletcd. 'lo assist in properly centering the head oi the rivet upon the end of the plunger the walls, C, of the latter are arranged to extend slightly beyond the end of the magnet poles at, (i the result being a cup-shapcd end tor the plunger, and it desired the poles of the magnet its-ell may be cupped out as indicated at, (i For more accurately engaging rivets which are lnadc with convexly rounded heads.

In Figs. 2 and 3 there is illustrated a modified form ot magnet which is perhaps thcoretirailly 1'norc nearly ideal than that shown in Fig. 1, but which may not always be found so desirable trom a constructhmal standpoint. It is C-shaped in outline so that the space between its arms which corresponds to the space, G in Fig. 1 becomes in this case preferably circular, affording the least possible op mrtunity for dissipation of the magnetic force by the creation of a magnetic field elsewhere than at the poles. This magnet is shown loiilgcd in a bifurcated plunger of non magnetic material with a lmshing, G, oil. such material occupying the circular space within the magnet. In this case the Frame, A, is cut away sulliciently a t, A to pre vent contact oi. the magnet, G, with the :lramc, A, and to insure a sulliciently wide air gap as compared with the air gap, G, between the poles.

I claim 1. In a riveting machine, the combination of a frame of magnetic metal and a driver guided for movement therein, comprising a two-pole magnet consisting of a bifurcated bar with its poles disposed side by side at the driving end, and a carrier for said magnet of non-magnetic metal constituting a sheath which surrounds the poles of the magnet, the air gap between said magnet poles being less than. the shortest possible path connecting them through said nonmagnetic sheath,

2. In a riveting machine, the combination of a frame of magnetic metal, and a driver guided for movement therein comprising a carrier of non magnetic material, and a twopole magnet consisting of a bifurcated bar with its poles disposed side by side at the bifurcated end, the space between the two limbs being least in the vicinity of said poles and such magnet being secured in a socket in the end of the carrier with its poles exposed.

3. In a riveting machine, a driver comprising a carrier of non-magnetic material, and a two-pole magnet secured therein having its poles disposed side by side at the driving end, the material of the carrier extending alongside the said poles and slightly beyond them.

In a riveting machine the combination of a frame of magnetic metal and a driver guided for movement therein, comprising a carrier of non-magnetic material, and a twopole magnet consisting of a bifurcated bar with its poles disposed side by side at the driving end, said magnet being slightly sunk in the end of the carrier to permit protrusion of the non-magnetic material thereof beyond the poles of the magnet.

in testimony whereof I have hereunto set my hand at Chicago, Illinois, this 20th day of February, 1912.

DAVID C. SASSEMAN.

,"Vitnesses: i Rom. l BURTON,

EDNA M. MAolNTosI-I.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 5:: Patents, Washington, D. C."

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