US1772852A - Electrically-operated hand tool - Google Patents

Description

L. G. BATES I ELECTRICALLY OPERATED HAND TOOL Aug. '12, 1930.

Filed June 18, 1921 INVENTOR. Jazz/elite Q .Eafes A TTORN Y6.

Patented Aug.v 12, 1930 UNITED STATES PATENT OFFICE-'1'} LAURENCE G. BATES, O1! CLEVELAND, OHIO, ASSIGNOR TO. THE IBO'WLEB AND BUB-' DICK COMPANY, OF CLEVELAND,

OHIO, A CORPORATION OF OHIO ELECTRICALLY-OPERATED HAND moon I Application filed June 18,

This invention relates to. hand tools, and more particularly tools ofithe type having an electro-magnetically reciprocated mandrel; and it is among theob ectS of the invention to provide a readily controlled device adapted to operate with various reciprocatively driven tools or points as desired, such as matting tools, cutters, engraving tips, drills, pluggers, etc. Other objects and advanitages will appear as the description procee s;

To the accomplishment of the foregoing and related ends, the invention, then, consists of the features hereinafter fully described,

and articularly pointed out in the claims,

the ollowin drawing setting forth in detail certain con structions embodying the invention, such being however illustrative of but a few'of the various ways in which the principle of the invention may be employed.

In said annexed drawing: a 1

Fig.1 is an axial sectional view of an embodiment of the invention; Fig. 2 is an ele-, vational view of the upper end of the same;

Fi s. 3 and 4 are details in plan; Fig. 5 is a detail in perspective;rFig, 6 is a section taken on the plane indicated by the line VI-VI, Fig. 1: Figs. 7, 8 and 9 are eleva- 80 tional details; Fig. 10 is an elevational view of a detail modification; and Fig. 11 is a sectional view of a further detail modification. Referring more particularly to the drawing, which illustrates the invention as applied to a jewelers tool, the reference numerall designates a casing within which is .an ele'c tro-magnet- 2. Reciprocable in the magnet.

is a mandrel 3 having an armature 4, and projecting on through the casing to carry a tool point 5. Threaded into the uppervend of the mandrel, which may be made hollow if desired, is a screw 6, the head 7 of which rests on a plate-spring 8. The latter is an-..

chored at its other end by a screw 9 which is set into an insulating headpiece 10 fastened to the casing in any suitable manner, for instance by screwss. This spring tends to lift the mandrel away from the magnet, and

the length of stroke isgauged by the throw 4 sired to disassemb e the tool. The plate15, escription and the annexed 1927, Serial. K0. 199,855.

allowed the armature, adjustment being had by means of the screw 6. A stirrup 11 extends from the cap 12 across in theslot 13 of the screw such that rotation of'the cap' correspondingly rotates the screw for adjustment. The cap may be held i'nfsuch'rot'atable posi- 5 tion in any suitable manner, as for instance by snap-projections 14 engaging the walls of an opening 15 in plate 15, somewhat as the parts of a snap-fastener engage. 'That is, the cap may be snapped into'place, and may; be turned through an angle -of rotation, for adjusting the, screw and armature throw, and

yet may be readil pried off "when it is de ofdisk-like form and usually of insulating material is fastened to the head 10 by'suitable means, for'instance screws 16; In the head 10 there are lateral boresto receive plug-in 7 connections from the line of operating-current supply. A central bore 17, preferably screw threaded, may serve to receive one terminal plug of the lead-in wires, the one end of the magnet wire being connectedfto the bushing of the bore, and the other end of the magnet winding connects to the bushingsin-i bores 18 and 19. One of these latter. however, is a. direct connection from bushing to magnet, while the other goes by way of the plate-spring 8 and a. contact 20 located to coact therewith. From this, itwill be seen that when the lead-terminal is plugged into one of the bushings, for instance 18, the cir:

cuit to the magnet goes by way of the contact? and spring, whilewhen plugged into the other bushing, thecircuit goes direct. This allows of the same winding to operate on either direct current or alternating current supply according as the second terminal is pluggedinto the bushing leading through. the interruptor contact or into the 'bushin leading direct. By providing one termina as a screw-threaded plug for engagement in bushing 17 and the other feed terminal as a slip plug engageable in plain bushings 18 and 19, one set of equipment may function for either current. supply as available.

The design of the armature 4 is such as to particularly facilitate owerful thrust, being of a general plate or disk-like shape,

the barrel ofthe'casing."

netic leakage is minimized and the lines of force in the magnet field are directed to most efiectively' exerted for a strong sharp pull upon the armature for "this usage. I

degree of flexibility or jointing such as-to allow of a certain amount of lateral play'at; the point. This may be accomplished byset ting in, a length of flexible 'shaftingor' the like 22in the centralportio'n of the mandrel, or in 'the form showninfligl -,l0a-pivoti joint 23 mag befinterribsed, Iniany such was i 6 a. a smsa m her fid p d i azi provided below. ,7 To" regulate f a c e ra e a justi g c l 24; is screw-threadedly mounted" o'nfthe 'end of the casing, such-that the mandrel andtool carried projects therethrough, being guided y e Per ng H fm suid 25 13119 u de. is furthermore adjus'table by virtue of haw ing split prongs 25 whereby the oplenin" through jthei guide is exianded or retracted "seen that some" lateral] throw the clearance and adjust su as the cap 24 is screwe moreorle'ssupon with a tool-pointrecieiving chuckl A simple andpreferred form forithis comprises a ref cessecl or: tubular endfor themandrehand a point having a slightwin'g projection on" its inner end 'this'wing projection may be pushed in past the lock'26'and'then berot'ated slightly to engage here-behind, somewhat the manner ofabayonetjoint.v

The tool points adaptable to this it levice may of course be Quite'varied'. In Fig. 1,

there is illustratedan equipment having a matting tool point 5, such as will besuitable for fin shing mat surfaces in 'jewelers and engravers-workL In'Fig. 11, the-mandrel 3 is equipped with a tool point for dappin Such point may consist of an attachment 2 "to clamp on the threaded'endof-the barrel of the casing, the mandrel bein connected 'to a pivot 28 on a lever 29. This ever mayha-ve a screw threaded socket to"receive workin points 30 of different size and contour. Suc' lever m zi'y be of first or'second class, as de' sired. he mandrel carrying such a beaterpoint may thus be readily operated on" jewelers hollow-ware, *etc.,' particularly in difficulty-accessible"places, wherea beater 'action-is wanted;

In'the use of the device, as will" be readily" understood from the foregoing,'thelead wires for the operatingcurrent 'fror'nthe'line are plugged into the Y respective socket-bores in the head ofthe-tool, one lead terminal screw be lower' end of the mandrel is equipped mounting. f

' As: already v applied maybevariedfin accordance with the the inv.ention-='may be emp ingmade as regard's'the details disclosed;

ing into the central screw socket 17, and the other lead terminal plug being set into the one or the other of the lateral bores 18 or 19 according as direct current or alternating current is to be used, in the case of the alternating current,'1thecircuit leading direct to the V ma'gnet,'andi the alternations of-"the; ciirrent The mandrel may be in the form of asolid stem, forlsome uses, but in the caseof altool particularly adapted for jewelerls mattingand'engraving usage, I prefer to introduceaserving" to intermittently} pull the armature and the mandrel', whileyi'n' thecase of the.

directihurrent, I the vcir,nit= leadsthrou the interrupter contact 20 whereby the'necessary throw being directed'"toflthe tool point. B

the cap in' conjunction with" a pointer 32' by Ineansof which adjustment may be tatedlf Where ant-era component of thrust 11 isdesired, particularly as in the case of mat i tinggthe capQ l-may'beturned-so as'to spread" Y the guidepo'rtions 25, thereby correspond ingly' allowing free orlateral lay for-"the tool p'oint5, Adjustment as to t is'niay accordspring Sin so far as its particular setting may be concerned can be attended toin the 'origim1 assembly of thedevice'fand'with the insulatingflsheet'33fina1ly positioned thereabove this portionlfof the' fdevice will're'quireno V flfurt-her attention: onthe part of the operator lockindent 26 thereimsuch that with, atool;

such adjustmentof thegthr'ow' of the mandrel seen, the particular tool points" particular i work,i nhand; and correspondinglyr also the size and weight of theassembl'y generaliywillflvary' from a; light pen-like.

device or delicate-engraving work "in the jewelry; trade on the one hand, or on the-other hand t ejcoarser typesof work in other lines will correspondingly: be provided for by 7 largerand heavier construction. The prin-' ciple maythus he applied to a wide rangeof inglyr be had asrequir'edl, Adjustment ofthe'l as may berequiredjbeing had-entirely exter- 1 'nally bythec'apin its rotatable oroscillable F metal workin fine or coarse, die work, stone Y en 'avingan cutting, etc. ther modes'of applying provided the-means stated'in any of the following claims or the equivalent ofsuch, be employed 'I therefore particularly point out and dis-l" tinctly. claim as my'inven'tion t'- '1; In a device of the characterdesc'ribed, the combination'of a solenoid magnet, arecipro'cable mandrel projecting through said magnet, and a disk-like armaturese'fcured to said mandrel to reciprocate therewith and throw, said mandrel; .be1ng,adaptedto carr .3. 'II;nadevice of the character described thef combination$"of aysolenoid magnet, 'a mandrel projecting through said inagnet, an g armature "secured to said 1 mandrel, 1 aspring "for retracting said mandrel, ahead formin having a beveled edge adjacent the magnet, said mandrel being adapted to carry a tool.

2. In a device of the character described, the combination of a solenoid magnet, a

mandrel projecting through said magnet, an armature secured tosaid mandrel and hav-- ing a sloping face, the face of themagnet being correspondingly slopin ,a spring .for retracting; said mandrel; an an adjusting scre'w' iengaging' the s ringto control it a tool. l

part of the enclosure'ifor the armature an supporting said spring, :an ladj'usting. screw" in the end of saidmandrel, and a "cap mounted on said headfor rotating saidscrew.

4. In a deviceofthef character described,

i the combinationof a solenoid magnet, amandrel projecting1 mature secure to sai mandrel,a spring for retracting saidmandrel, a head forminegpart' of the enclosure for the-armature an supporting said 5 ring, an adjusting screwin the end 'ofisai mandrel, and a. snap-fasten ing cap lmountedon said-head "for; rotating said screw. 1

5. Ina devicefofthe character described, the combination ofa solenoid magnet, a man-' drel projecting through said magnet, an armature secured" to ,said mandrel,-.aaplate-" spring for returning saidzmandrel, a head forming partoftheiienclosure for the armature and to which said spring is anchored, i and an adjusting screw bearing againstthe free endof said spring'andthreadinginto the mandrel. V

6. In a device'of'the character. described, the combination of a solenoidmagnet, a man- I drel projecting through said magnet, an "er-'- -mature secured togsaid, mandrel, a plate spring for returning saidmandrel, a head forming part of thej enclosure. for the armature and to which oneend'of said spring is anchored,an ad'usting screw bearing agamst :the free end 0 said spring and t reading into the mandrel, a stirrup engaging in the slot of said screw, and a cap mounted on said head for actuating said stirrup.

7. In a device of the character described,

the combination of a solenoid magnet, a mandrel projecting-through said magnet, an armature secured to said mandrel, a late vspring for returning said mandrel, a ead forming part of the enclosure for the armature and to which one end of said spring isanchored, an adjusting screw bearin against the free end of said spring and t reading into the mandrel, a stirrup engaging the slot of said screw, a cap mounted on said head for actuating said stirrup, and resilient throu h s'aid magnet, an ar sition.

"8.; In a device of the Characterde'sribd,

the combination'of a solenoid magnet, a man drel projecting throughs'aid magnet," an an mature secured to'sa-id ,inandrel and having a fslopin g face', and means iwliereby either alternatingxcurrent or dir'ec't current ;may ,energizesaidmagnet, saidiiiieans'includingv jcoizinections I ,direct r to V the magnet windin'g is'e aratej connection through a makea contact operated "by the mandreloe'ation. a V a In adevice of the character described, the combination of a solenoid magnet, a manfdr'el projecting through said magnet, an armature secured to said mandrel, a plate- ..spring for returning said mandrel, ahead to which one end of said spring is anchored, a contact on said plate in circuit with said magnet, an adjusting screw in the end of I said mandrel and engaging said spring, and

a'cap mounted on said head for actuating said adjusting screw.

f .10. In a device of the character described,

the combination of a solenoid magnet, a mandrel projecting through said magnet, an armature secured to said mandrel, a plates ring engaging said mandrel for returning t e same, a head to which one end of sai sprin is anchored, a contact on said spring,

and p ug-in connections whereby said spring- .contact' may be included in circuit or be shunted. 1

11. In a device of the character described, the combination of a solenoid magnet, a mandrelprojectin through. said magnet, an armature secure to said mandrel, and means .net, a tool-carrying mandrel projecting through said magnet, an armature secured to said mandrel, and a tapering collar threaded on the end of the casing and surrounding the mandrel for varying its distance of lateral throw.

- 14. In a device of the character described, the combination of a casing, a solenoid magnet therein, a mandrel in said magnet, an armature secured to said mandrel, and a collar threaded on the end of the casing and having tapering split projections surrounding the mandrel for varying its distance of lateral throw.

15. In a device of the character described, the combination of a casing, .a solenoid magi'it the'rin; a mandrel ii n Said magnet, an armature on said mandreLa late-s ring for returning said mandrel, a head to which one end of said spring is anahored, an adjusting screw bearing agamst the free 'endf pf sai' spfi'ng and-threading into the mandf'l, and a collar threaded on the (and of said casing, and havin tapering split projeetions surroundin t e mandrel for varying its dis; m tance of lateral throw n q Signed by me this 13th a? pf J mm, .1927.

LAURENC ,G. BATES.

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