USRE12571E - Reissued deu - Google Patents

Description

A. PEDERSEN. PORTABLE ELBGTRIGALLY,-0PE'RATED DRILL.

APPLIQ ATION TILED JUNE 25.1906.

BEST AVAILABLE COP\ BEST AVAILABLE 00px REISSUED DEC. 4, 1906.

' ,A. P'EDERSEN.

PORTABLE ELEOTRIGALLY OPERATED DRILL.

, KPPLIOATION FILED JUNE 25,1908.

3 snnms snmiw 2.

i ww

BEST AVAILABLE COP.

REISSUED A. PEDERSEN. PORTABLE ELEGTRIGALLY OPERATED DRILL.

APPLICATION FILED JUNE 25.1908.

3 SHEETS-SHEET 3.

Field Jayne-i.

l4? TNES-SES;

{@1'0 .5mm fimay concern.- 7

eritknown that I, ADOLPH "PEDEnsEN, a

riven tools and machines, x5 various combinations; and

' ,ofithe elenicnts referrin especially to controliing mechanism ,adapte to control the motors used in ma-' BEST AVAlLABLE cop .1 ,PQRAI OF O -x citizenofthe United States, and a resident of leveland, countyof Cuyahoga, and Stateof si Qhio have invented a new and useful Imrovementin Portable Electrically-Operated rills, .of,which the following a specifica- -.tion, the rinci'ple of the invention being hereinexp ained and the best mode in which 10 I have; contemplated so 'as to distinguish that principle plyin. I

er inventions.

'- My-invention-rellates to portabie electrice allyt-operated drills and other electricallyand especially to I subcomhinations of the same, thls invention chines of. the BbOVGKIlGIltlOIiBd character, as

so also. to the construction of Y the handle used o anis1n embodyingthe invention,

3 5 sents a vertical 5 c chine and to theiconstruction of the handle the lines 2, 2, I gto guide the tooland tothe relative arrangement' and location of said handle, said conw trolling mechanism; andthe means for actuating the latter. 5

,, after fuily described, and specifically set 1 Said invention consists of means hereinforth in the claims.

. .The annexed drawings and the following description set forth in detail certain mechsuch disclosed means constituting-but one of various -mechanical forms in which the principle of and 2.. Fig. 4 represents a'vortical' section taken upon the planes indicated by the lines 4 4, Fig. 2, plainly showin the relative arv 45?.rangernento the drill-hand c, the operatingsleeve, 1 and; the. controlling m echanism and Fig 5-i-s a diagram illustrating the circuit connections jMy invention relates tothe controlling .ap-

paratus of'an electrically-driven tool or ma- 1thereof, ,asfalso to the relative arrangement a m ish. omo; IYDORNELLIOTTELECTRIC COMPANY, OFCLEVELANE), OHIO, A.-'UO:-

. Specification of B-eissu'ed Letters Patent.

showing the controiling' 5 mechanism and some. related parts in plan.

4 Fig.3 repesentsavertical section taken upon i p the plane. indicated by the line 3 '3, Figs.

"Assiosoa To via PORTABLE EYLECTRICALIMYMOPEFQATED new;

Eteissued Dec. 4, 1963;

f ma ia. 809,4,60, and January 9, name. Application for rcissnefilsd irm 26,1968. Eprialll'o. amass.

' and location of said handle, theopera'ti i sleeve, l have illustrated said. invention in one 01 L uses as particularly applied to aportable eie-1zltrically-operated dri such. as ,is described and claimed in United States Letters Patent and the controlling mechanism, ans. I

No. 809,394, issued January 9, 1906, upon ahle drills.

As shown in the above-mentioned patent I provide a suitable easing A for the drill and intermediate ,dia hrs-gm A extending trans movable head or ca .183 and'a latera removahleportion A, wit iin which is inclosed the controlling mechanism forming a part of the subject-matter of this invention. Within the casing A and suitably secured thereto are the {our pole-pieces E .of a field structure surrounding the armature E of a multipolar series-wound constant potential electric tor suitablv secured to a motor-shaft.

shown.) The upper removable head A is screw-thread, and the diaphragm A" has a central aperture cin alinement with the aperture (1', and through said apertures the spindle of the drill and the feed screwtherefor are adapted to be inserted, as explaine in my above-mentioned United States Letters Patent. Within the diaphragm A are suitable bearings a", in which are journaled pintlos that carry upon their lower ends two pinions adapted to mesh with a gear wheel (not shown.) keyed u on the drill-spindle and upon their upper encs two pinions adapted to mesh with a gear-wheel (not shown) keyed upon the motor-shaft, all as is clearly shown and described in said United States Letters Patent.

The electrical driils that are at present in, use are not adapted to general applicat on in so hut as I am aware, and the reasonforthis is as foilo'ws: it is usually desired. that very rapid work be performed, and in order-. to acsuitahl'e manually-operated if the turning ofthesaid feedan inexperienced man,

work by some screw device. screw is oflectediiy the norinal proper speed of'the mot or'is acceljzferated or retardrfl, and

my invention in electrically-operated port i (Not complishthis the drill must be forced to its if the speed becomes connected mechanism, such casing having an versely across tie same and an u perreprovided with a central aperture 0', having a tected,

a BEST AVAlLABLE COP *machine will be immediately burned out. If

the drill is provided with an ordinary circuitbreaker the machine will not always be pro for the operator soon discovers that he can defeat the object of the circuit-breaker and prevent it from operating by simply holding it down, thus causing the drill to do more work. I have sought to eliminate this trouble and provide a drill which is at all times re- .liable and Proof against the carelessness or ig- 1 5 norance an inexperienced man by rovidingI the automatic controlling mec anism w 'ch will now be described ill-detail. The machine being series-wound and series-connected the magnetizing'force will rise with the current, and b; plac' a small solenoid directly on the bac of the eld-core and connecting the same accumulative with the fieldwindings I am enabled to break-the current at any time that the magnetic flux of the motor has reached a predetermined I Of course no action would result if t e solenoid were placed elsewhere and connected so as to oppise the field-windings to which it is connecte I shall roceed to describe the drill-handle and the relative arrangement of the same with an operatin -.sleeve and the controlling mechanism, whic forms an essential feature of my invention, such a handle being illustrated at B provided with a suitable outer screw thread and adapted to be connected to an intemall -screw-threaded integral projection a upon t e lateralportion A of the casing. An operat' -sleev e C surrounds the lower portron of t fie handle B and is rotatably secured,

by means of a screw 0, to the stem d of an insuat' -sleeve 0 is actuated thus making the ha l 1 5 lating semicircular switch-disk D, as plainly shown in Figs. 1 and 4, a suitable slot 4, be' provided in the handle B, throug whicl i tiie screwy: may travel when the oper-.

le B rigid with the drill-cas' By thus making the handle B immovab e and also of quite a length and removing its outer end some distance from the operating-sleeve C the drill can be carried about by means of said handle and another handle (not shown) with the other side of thecasing without any danger of accidentally revolving or disturb the operating-sleeve 0. Ohviously this eature of actuating the controlling mechanism through a rigid handle by means of-an operating element located exteriorly of the handle and connected with the controlling mechanism interiorly of the handle is of general application in tools or machines and I do not intend .herein to confine to its use in a' portable electricallydrill, nor to the exact relative arrangement herein shown between said handle, op-

uantity.

erat' means, and control] the ll liad feature being mer df through a fixed handle.

a I shall now describe the controlling mechanism, forming another essential feature of my invention.

mechanism the control secured upon the coreof one of the field-poles E by means of a screw G, formed out of a 'I'na netic material, which is located within am? under the influence of the magnetic field and assists the solenoid in pulling a screw F inwardly, which screw F serves as a cut-out ma net and forms the core of the solenoid am? is adapted to beactuated when the magnetic flux of the motor has reached a predetermined quantity, such quantity being varied as desired, since the cut-out magnet F is adjust able by being screwed through a sus ensionring as plainlyshown in Figs.l,4,an 5. Pivote to this siispension ring f by means of pins 3' is a forked magnet and switch-lever J, provided at its outer end with a shoulder 7, engaging with a pin 1* when the cutout magnet is in its normal upward position, which pin 1 is secured in an element J, pivoted in ears 7", projected upwardl from an insulated base N supported upon t 1e casing A. The lever wardly from theinsulated base I tends to turn the element J Z, but is normally prevented A spring upon its ivot from so 0mg der 1, as plainly shown in Fig. 5. A second spring 1' serves t9 assist the Weight of the le ver J in holding the shoulder 9 to engagement with the pin 1'. The spring I is a wound-wire spring and is adapted to throw out a knife-switch L, and thus break the cir-' cuit between the I shown in 5, when the cut-out magnet 4 'and when the operating-sleeve the arrow, Fig.- 2, said' cam-face d aresistance N",

clips n, which in turn are 'secured' ports 11/ upon the insulated. base N.

As plainly shown in Fig: l, a solenoid H is J is pivoted in uprightsK, also lgrojected upby the engagement of the pin 1 with the'shoub' switch-poles 1:4, as plainl isdrawn within' the solenoid H and the,

gin I". In -disk -D is disk D is provided with'a projection 1', form ing a cam-face, as cl the sivitch disk Dis in its full OR '1 to turn the switch-disk D to its Position, which would be in the dire'e- 11; contacts with the element J to move the same backto it's normal upright position, as. shown in Fig. 5 'a nd the pm again-e with the shouk er seats to hold sfi e e,-' be circuit is illustrated-ff at M, .Fig.- 5, and within such circuitis'intro ective as follows:

swish- N supported upon a plurality of contact-' to sup-,;

'Wheli 1 aid of the sprint, holding the 016mm J in circuit is of course broken and is not a made unt'ilthe switch-disk has been revo sufficiently toward its full on bring the short-circuiting switch I 1 passes the current throng 'erating handle O, with the operating-sleeve C, said handle being operative only EST AVAlLABLE COPE ved position to upon the two left-hand contact-e11 s n, Fig. 5, which the forward end'of the switch N contacts passing the By thus in- A suitable reversing-switch O is provided, having an opadapted to be interlocked when the sleeve 0 has been turned to hold the disk D in its off position. A suitable clock-spring d, Figs. ,1

and 2, is provided for holding the switch-disk D in its off position when not in use.

1;-; -From the above of my invention,

description the operation which is as follows, will be readily understood: The oerating-sleeve C is actuated to turn the SWltGll-(liSlC D to its I it gradually through the medium of the shunt N, and'when the full-on position, the current being applied magnetic flux of the motor has reached. a quantity which has been poles- L.

out magnet F is lenoid Hand the magneticmemberG, th-us releasing the pin I from the shoulder j, enablin the spring Z to pull the element J forwardly until it rests against the switch-disk' -D, carrying throught dangerous to the machine the cutdrawn inwardly by the so with it the. knife-switch L, and thus breaking the'current between the switch- By turning the switchdisk D to its oil position the element J is carried back by the cam-face (i of the switch-disk D and the pin 1 engages with the shoulder j, thus by the its normal position when the switch-disk. D

is turned, back to 'magnetlc flux meanwhile has settled below its full on position if the the quantitywhich has been predetermined to be that at which the cut-out Ina net F should be actuated. When the dril is in use, the switch-disk D is prevented from turning under the tension of the springd by means of a spring-clip d",

' the switch-disk D, as plainly shown in Fig. 2.

When

- clip d, and thus automatic)switch prising 'niy motor ccmtroller and thefeature ofa control through a fixed handle, together with the describec relative arrangement of said handle, the controlling mechanism, and

ain

the shunt N untilmotor;

which is detachably I "hooked over a screw (1, secured to a lug of actuating means for the latter, as particularly applied to drills, still I wish it understood thatthey can be used upon any;elet

trically-driven tool or machine where it is desired to provide compact and-ei'licient mechanism of the character described.

Having thus described my invention in detail, that which I particularly point out and distinctly claim is- 1. In mechanism of the character described, the combination with an electric motor; of a circuit for its armature connections; means for automatically breaking said circuit when the magnetic flux of the motor reaches a predetermined uantity; and a manually-operable switch-di adapted, when it is actuated to its off position, to close the break in the circuit made'by said automatically-operating means.

2. In mechanism of the character described, the combination with an electric of a circuit for its armature connections; means for automatically breaking said circuit when the magnetic flux of the motor reaches a predetermined quantity; a manually-operab e switch-disk adapted, when it is actuated to its off position, to close the break in the circuit made-bysaid autom atically-operating means; and a shortcireuiting switch included in said circuit and rendered operative during the actuation of said switch-disk toits on position. 3. In mechanism of the character described, the combination with an electric motor; of a circuit for it's armature connections; a solenoid included in said circuit; circuit-breaking means adapted to be operated by the inward stroke of the core of said solenoid, such inward stroke of said core being ei'l'ected when the magnetic flux ofthe motor reaches a redetermined quantity; a manually-operab'e switch-disk 7 adapted, when it is actuated to its oil position, to close the break in thecircuit made by said circuit-breaking means; and means for effecting the outwan stroke of said'core.

4. In mechanism of the character described, the combination with an electric motor; of a circuit for its armature connections;

a solenoid included in said circuit; circuitbreaking means adapted to be operated by the inward stroke of the core of said solenoir such inward stroke of said 00 e being eil'ected when the magnetic flux of the motor reaches a predetermined quantity;

v a manually-oper able switchlisk adapted, when it is actuated to its oil position, to close the break in the circuit made by said circuit-breaking means; means for eiiecting the outward stroke of said core; and a short circuiting switch in; eluded in said'circuit, and rendered operatiye. during the actuation of said switch-disk to its on osition.

5. n mechanism of the character dc scribed, the combination with an electric inocircuiting included in said circuit; a

1o cuit made by mud antomatically-operating 45 said lever,i ind held to contact with said -oircuit made BEST AVAILABLE GDP tor; of a circuit for its armature connections; means'for automatically breaking said circuit when the magnetic flux of the motor reaches a predetermined quantity; a rotate shortseries of fixed contact-clips supporting said switch; manually-operable switching means ada ted, when they are actuated to their 0 position, to close the break in the cirmeans, the actuation of said manually-operable switching means effecting the rotation of said short-circuiting switch, the latter contacting with said clips during the actuation of the switching means to their on posi'- tion, so as to render sald short circuit operative. 6. In mechanism. of the character described, the combination with an electric motor; of'a circuit for its armature connections: means for automatically breaking said circuit when the magnetic flux of the motor reaches a predetermined quantity, including a solenoid, a core therefor,.a pivoted lever connect- 2 5 ed at one end to said core, a knife-switch, and

switch-poles, said knife-s witch held to cnga gement with the other end of said lei'er and held to contact with said switch-poles, when said core is in its outermost position; means 0 for effecting the outward stroke of said core;

and a manually-operable switch-disk adapted, when it is actuated to its off position, to'close the break in the circuit made by said automatically-operating means.

7. In mechanism of the character described, the combination with an electric n10.-

tor; of a circilit for its armature .connectionl.

means for "automatically breaking said "chicuit when the magnetic flux of the motor 40 reaches a redetermined quantity, including a solenoi a'core therefor, a pivoted lever connected at one end tosaid core, 'a knifeswitch, and switch-poles, said knife switch held to.-'engagement-with the other end of switeh poles, when said core is in its outerpositidmjiiteans for efiecting the outward stroke 'ofsaid core a manually-operable switch-disk adapted when it is actuated 9 .to its 0 position toelo b said automatically-operating new; and a sliortrircuiting switch included iii-a'aidfcircuit'and rendered o erati ve during thdhetiiation of said switchisk to its on mechanism of" the character described, the combination with an electric motor; of a circuit for-its armature connections;

means for mitomaticall s breaking said cir- 6c-icuit when the magnetic flux of the motor reaches a predetermined quantity, including T a solenoid, an adjustable core therefor, a pivoted lever'conneeted at one end to said core,

a pivoted element held to engagement with a drillhandle: and means for controlling so the break in the and independentlyof the latter.

the other end of said lever, when said core is in its outermost position, two switch-poles and a knife-switch connected to said pivo element and normally held by the latter to contact with said switchles; means for effecting the outward stro e of said core; and a -'manually-operable switch-disk adapted, when it is actuated to its off position, to close the break in the circuit made by said automatically-operating means.

9. In a portable electrically-operated drill, the combination of an electric motor provided with a suitablecasing; a drill-spindle mounted in the latter; gearing connecting said motor and spindle; a manually-operable controller for said motor; and means for automatically actuating said controller to assume the oil position when the magnetic flux of the motor reaches apredetermined quantity. 1

10. In a portable electrically-operated drill, the combination of an electric motor provided with a suitable casing: a drill-handle connected to the'latter; and means for controlling the operation of the drill through said handle.

11. In a portable electrically-operated drill, the combination of an electric motor provided with a relatively stationary casi adrill-bamlle: and meunsforcontrollingt 0 operation of the drill through said handle.

12. In a portable electrically-operated A drill, the combination of an electric motor rovided with a casing, said casing supporting the licldavindings of said motor; a drillhandle; and means for c ntrolling the operation of the drill through said handle.

13. In a portable electrically -operated drill, the combination of an electric motor provided with a relatively stationary cas' tlfe I05 motor through said handle, and independ-' ently of the latter.

14. In a portablc electrically-operated drill, the combination of an electric motor rovided with a casing, said casing supportno mg the field-windin s of said motor; a drillf handle; and means or controlling the motor through said handle and independently of the latter.

15. In a portable. electrically-operated drill, the combination of an electric inotor provided with a suitable casing; a drill-han-- dle connected to the latter; and means for controlling the motor through said handle 16. In a portable: elcct"cally -operated drill, the combination of an electric'motorf provided with a suitable casingf-a drill-handle iixed to the latter;and meansfor controlling the operation of the drillthmugh said handle,

l7. In portable clectrically -operated. drill, the combination of an electric motor.- )rovided w th a casing, said casing supporting the fich windings of said motor; a drillup,

5 a means;

handle, iixed to said casing; l)

' the drill; and means die connected seer AVAILQBL and means for ccntrolling the operation 0 he drill thro ugh handle.

w 18., In a pdrtable electrically-operated drill, the combination of an electric motor provided with a suitable casing; a drill-hanto the'latter; means located within said handle for controlling the operatlbjlgdf the drill; and means located exteri olrlof saidhandl for actuating said conling means.

t 0 119. In a portable electrically-operate drill, the Combination of an electric motor rovided with a relatively stationary casing 'afdrill-handle; means located interlorly of said handle for controlling the motor; and

means located exteriorly of saidhandle for actuating said 20. In a controlling means; portable electrically operated drill, the combination of an electric motor rovided with a'sui'table casing, a drill-handle fixed to the latter; means located within saidhandle for controlling the operation ,of located exteriorl of said handle for actuating said contro ling 21. In a portable electrically-operated 'drill, the combination of an electric motor 1 rovide'd with a casing, said casing support Y mg, the field-windings of said motor; a drillhandle; means located interiorly of said handlefor controlling the motor; and means loatedexteriorly of said handle for actuating said controlling means, said actuating and said controlling means being adapted to be operated independently of said handle.

22. In a portable electrically-operated drill, the combinatiomof an electric motor provided with a suitable casing; a drill-harr dle connectedjei the latter; a controller for said motor lociited within said casing and rovided with a stem extending within said .andle; and means located exteriorly of said handle and rotatably secured to said stem. i

23. In. a portable electrically operated drill, the combination of an electric motor rovided with a suitable casing; a drill-hanle connected to the latter; a controller for said motor located within said casing and rovided with a stem extending within said I andle; and a sleeve mounted exteriorly of said handle and rotatably secured to said stem.

24. In a portable electricallymperated drill, the combination of "an electric motor iovided with a suitable casing; a drill-hanle fixedto the latter; a controller for said in'otor located within. said casing and pro- Ros vided with astem extending within said handle and means located exteriorl of said handle and rotatably secured to sai stem.

25. In a portable electrically-operated drill, the combination of an electric motor provided with a suitable casing; a drill-hanl to sai closing portion cosh dle fixed to the latter a drill-spindle aunted insaid casing; geari'ngcozt motor and spindle; a controller'io'r said mo tor located Within said casing and. provided with a stem extending within said handle; and a sleeve mounted exteriorly of said hau dle and rotatably secured tosaid stern. I 26. In a portable electrically-operated] drill, the combination of anelectric Inotor provided with a suitable casing; alateral inclosing portion connected to said casing; a drill handle connected to said lateral portio11;.a controller for said motor located within said lateral ortion and means'for actuat 1 ing said'contro ler through said handle.

27. In a portable electrically-operated drill, the combinatiouof an electric motor provided with a suitable casing; a lateral in closing portion connected to said casing; a drill-handle connected to said'lateral ortion a controller for said motor locateciwithin said lateral portion; and means :lo'c'atedfex teriorl I of said handle and rotatably' secured controller. Q 5' f 2-8. In a portable electric'ally'operated drill, the combination of an electric motor provided with a suitable casing; alateral in closingl portion connectedto said casing; a drilbhandle connected to said lateral ortioii; a'controller for said motor 'loca'te within said lateral portion; and aslee've' located ex teriorl of said he dle and rotatablj securedto sai controllef '29. In a po ta drill, the combination of an electric-motor provided with a suitable cas'ing;'a lateraliri- I connected to said casingfa. drill-handle fixed to said lateral portion; "a controller for said motor located within said lateral ortion; and means 'locate'dlexteriorly of said 'andle and rotatablysecured to said 1 controller.

30.,"In a portable "electrically operated drill, the combination of an electric motor provided with a suitable casing; a drillspin dle mounted in the latter, gearing connecting said motor and spindle; a lateral inclosing portion connected to said casing a drill-handle fixed to said lateral portion; a controller for said motor located within said lateral portion; and a sleeve located exteriorly of said handle and rotatably secured to said controller. v

31. In a portable electricallyoperateddrill, the combination of an electric motor provided with a suitable casing; a drill-spin dle mounted in the latter; gearing connecting said motor and-spindle; a lateral inclosing portion secured to said casing; a handle screw-threaded to said lateral portion; a controller for said motor located Within said lateral portion and provided with a stem extending within said handle; and a sleeve mounted exteriorly of said handle and rotatably secured to said stem.

leeting said bis electrically operated roo BEST AVAlLABLE COP casing; a drill-ban le fixed to' the latter;

means for controlling the operation of .the drill through said handle; and means for breaking said circuit when the magnetic flux of the motor reaches a predetermined quantity.

34. In a portable electrically-operated drill, the combination of an electric circuit and a motor therein provided with a suitable casing; a drill-handle and a drill-spindle connected to the latter; gearing connecting said motor and spindle; means located within said handle for controlling the operation of the drill; means located exteriorlyof said handle for actuating said, controlling means; and.

means for automatically actuatin said con trollin means to assume theo position when t e magneticflux of the motor reaches a predetermined quantit 35. In a portable drill, the combinationlif 'an electric circuit and a' motor therein iprovide'd with a suitable a'fdr'ill-hand fixed to the latter; a let for s'aidfmotor located within said handle; manualliy-operable means located exteriorly of sai controller; and means for actua casing utomatically operatii {said controller toass'dni the o position, .when= the magnetic flux of the motor reaches 'a redetermined quantity.

- 36 In a vportab e electrically-operated" drill, the combination of an electric circuit l ti'ically operated j h'andle for actuating said 1 I and a motor therein lprovided with a suitable casing; adrill-hand e fixed to the latten'a drill-spindle mounted in said casing; gearing connectin said motor and spindle; a controller for sai motor located within said casing andprovlded with a stem extending within. said andle; a slee e mounted exteriorly' of said handle and rotatably secured to said stem; and means for actuating said controller to assume the ofi position when the magnetic flux of the motor reaches a mined quantity.

37. In a portable electrically operated predeterand a motortherein provided with a suitable casing; a lateral inclos' portion secured to said casing; a drill-hand e connected to said lateral portion; a controller for said motor located within said lateral portion; means for actuating said controller through said handle; and means for automaticall breaking said circuit when'the vmagnetic ux of the motor reaches a predetermined quantitf.

' 38. In; a portable electrical y-operate'd' drill, the'gbombination of an electric circuit and a motor therein provided with a suitable casing; a drill-spindle mounted in the latter; fearing connecting said motor and spindle; a 'ateral inclesing portion secured to said casa handle screw-threaded to said lateralf drill, the combination of an electric circuit a stem extending adthin said handle; a sleeve mounted exteriorly of said handle and rotatably secured to said stem and means for antomaticall y actuating said controller to assume the off position when the magnetic flux of the motor. reaches a predetermined quantity. 1

Signed, by me this 20th da of June 1906. A JADOLPH EDERSEN.

ttest':

JNo. F; OBERLIN,

G. W. SarwELL.

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