US1779031A

US1779031A - Electric handsaw

Info

Publication number: US1779031A
Application number: US58580A
Authority: US
Inventors: William P Casey
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-09-25
Filing date: 1925-09-25
Publication date: 1930-10-21
Anticipated expiration: 1947-10-21

Description

Oct. 21, 1930. w. P. CASEY ELECTRIC HANDSAW 2 Sheets-Sheet 1 Filed Sept. 25 1925 Oct. 21, 1930.

W. P.- CASEY ELECTRIC HANDSAW Filed Sept'.

2 Sheets-Sheet 2 1 v @ZMQJoQ:

Patented a. 21, 1930 WILLIAM r. CASEY, or osHKosH, W sconsin .1.

s rms HANDSAW f jn'i iiiati i "med se iimter 25,1925 Serial iii 55,530;

- Thisinvention relates to certain new and useful improvements inoelec'trical hand saws especially ofthe readilyportable type which is capable of general use in the wood-warn 5 ing and kindred arts. l

' One of the expensive items in the manufacture 0t electric hand saws ofthe character described is that of {assembling and the tine fitting and :machi'nin'g attendant "thereto which hasgreatly'increased. the cost of'repairs ,or"'replacements, and it is, therefore,

an object-of this invention to'provide an im- V proved 'type of electric hand saw which is soconstr-ucted as to 'be capable of instant assembly jan'd one in'w-hich the amount of machine work has been reduced to a miiii- Another ob ect' of thisjlnvention resides in the provision of an improved hand saw h'avjsaw which will be very eificient and practical in o'peration-and one inwh-ich allthe parts thereof are interchangeable" with other m chines of'the' same size; J j" 1 {With the above and other-objects in view which will appear asl'th'e; description proceeds,-'-my invention resides in'the novel construction, combination and arrangement of parts substantially as herelnatter described and moreparticularly" defined by th'eappended claims, it being understood that'such "by handles-18 and19,the handle-'ls being changes in the precise" embodiment {ofthe herein disclosed invention maybemadeas come within the scopeof the claims i In the accompanying drawings," have illustrated n o ple "(iii-ample 1 time physical embodiment of invention constructed according "to, the best node, I have so far devised for the practical application of the principles thereof, and in which: 1 r

Figure 1 isaperspective View of the'iniproved niotor-employedin connection with my invention; Y

Figure- 2 is aperspective housing orcasing;

bu Figure 3 isa'perspecti've' viewrof the drive parallel with the plane of movement oi? the saw"over-, the vvork. 1 The handle 19 is con- View of the gear spindle with drive geariattachedtwhich is removably sec'ured in ash-m1; fixed te th 11110 tor shaft; i v Figure 4 is apersp ectiveview of the or base member on'which theinotor an gear 155 housing are-mounted; i. I I Figure 5 is 'a-sidevieM-part' thereof be ing broken awayf-a'nd in se'ction,";o-f ants-*3 sembled machine-f. I

Figure 6 is anen l at the cutter end ofthesaw} 5 I v Figure '7 is'a' se'ctional 'view taken transversely through the gear housing onjthe plane of the line-77 of Figure 5'; an'd' V Figures is a View, partly'in section and partly in elevation, taken through thedrive spindle and gear; on the planeoft-he li-i 8' 8of Figure y Y I,

companyin'g drawings in which "likg is als designate like parts throughout the's'ev' 'eral views, the numeral 10 designates a supfportlng frame or base member,-the under or bottom surface of which istrued and preie'rably polished tofacilitate its nioveinent over the surface of; the material to be cut. The top of the framemember'is"provided with longitudinal reinforcing ribs ll and

transverse ribs

12,13, 13, l l and lfi, the ribs .12, 13 and 1 3 forming-a cradle for mounting r a drive. motor 16 and'the' rib 15 forming-the lower portion of a"bearing ring 'in whi'ch the outer endfor"anadjustable"gear housing l7, to'be later described, is rotatablymounted.

The frame member is guided over the work-:-

secured between laterally'extended arms or frame member, the handle being preferably w fined in'the endof ayoke member 21 'wh'i-ch r is 'secured to a vertical side portion 22 fof'the frame member by machine screws or other means 23, a finger gum-d 24, to be later Ade scribed, eittendin'g laterally from the closed end portion oi the yoke tea-flo a 'asafe-guard against accidental" contactbetween the fingers of the operator and; the cutter [25. 'f

- The motor 161s of the design and construe r i elevational View looking m i "Referring now more particularly to the ae-- I 2,

tion best illustrated in Figure land has cylindrical jacket creasing, the outer surface of which is perfectly plane to permit. its use in connection with a routing machine or a table, in the manner illustrated in my Patent, 1,745,780, grantedFeb. 4,1930. The outer end of the motor jacket has a terminal plug 26jthereon to detachablyrejceive a mat-' ing terminal plug 27 connected with the feed wires 28 in which a control switch 29 is interis closed by a machine 'screwsor other means 31 :andpermits accessto the motor proper, aLcent ral bearing boss32 being formed: on; t he cap in which the motor shaft, notshown, is-jour;

naled. A chuck member 33 is fixed onthe extended end of the motor shaftandhasja threaded bore 34 for receivingthe threaded end 35 of a drive spindle 36-on the. outer end of which a drive gear'37; is sp'linedfl The chuck 33 has itsopposite, surfaces "38 flattened to receive a wrench to facilitate the removal ofthe spindle36. A 1

ribs

12, 13 and 13 with its outer end abutting the vertical wall member 39,015 the frame member and isfirmly held against rotation by a readily releasable device 40,- consisting of alstrap 41 having one'end hinged1y c on .nected, as at 42, with the frame vme'mberfat one side between the ribs 13413 and ji'ts other end provided with a catch member 42 for receiving the locking port-ions43 of alatch 44pivoted in a mounting 45 secured, a's at 46, to theopposite side of the frame member. The mountings; 42 and'45 are preferably adjustable by means of bolts and screws 47to insure application of the proper tension on .the motor to hold the same against rotation. The latch 44 is of that type which passes beyond dead center when in locked position V and thus preventsthe accidentalrelease of tended fromthe rear= closed Wall49 of the the tension onthe strip,

The gear housing 17 is rotatably supported at its rear by theboss 32'which forms a j our;

nal Which passesinto a central sleeve 48 ex gear' housing. The outer end. of the gear housing is rotatably supported by 'the cradle rib 15 and a semi-ring 50; which, with the 1 rib 15, forms a bearing; The semi-ring 50 has one end pivoted, as at 51, to one end of the rib 15 andlits other end connectable with the other side of the ribby a'bolt 52 and a tension screw 53, the tension screw 53 serving'to firmly clamp'thering against the gear housingto restrain it from rotation after having been setfina desired position, as here-- matterdescribed;

The motor '16; is supported (in the .tion,; the chuck '35 with" its drive spindle ."vandfgear project into the housing'and the gear 37 mesheswith an idler gear 54 j ournaled therein eccentric with the axis of the housing ona spindle or stub shaft 55,:the'gear 54 in turnmeshingwith a driven gear 56.fixed on atool arbor '57 journaled eccentrically in the gear housing parallel with its axis by ball or other'siiitable type or bearings 58. The forivar-d "end of ithe arbor extends, outwardly from the gear housing beyond the adjacent end'-of-'the frame member1O to mount the cutter 25 which lfijxed thereon by friction washers 59' and time 60.- The outer. end-of the gear housingv is sealed bya renioyable plate 61 whichpermits the maintenance of lubrication within the housing for the gears. A boss 62, in which theouter or forward bearing of the tool arbor is iixed, extends beyond e p t 6 o P er e ter guard 63.

a moun n tense a A1 depth ring; 641's rattan at 1 housing and is adapted tobe'adjustably fixed thereon by a tension device 65 Ro tation of t e g r h us g, up n r lease Qfthekmi led nut 53 is facilitated by a handleee extended laterally therefro ms; L When it' is desired to set the cutter 25 for a predetermined depth of cut, the ring "64 is adjusted in thej nanner s a ed inmy L ters afie t N 1, 97, 64,

dated June 10, 1924, and the'gear'housing is ro ated, ntilv the l g? 6710f he: pth. ring abuts e s p fths fre I QLJS i l YEIQin Q Q ing rib 69. The binding screw 531is then:

tightened, to thus .hold the gear; housing against rotation and the cutter'25j will ;then

have its lowermost surface projected below Withj 'the gear housing mounted'in posithe working surface of the frame ne nher the desired depth;

In assemb n he mac ne; h ri i l is threaded -in chuck- 38, and the" gear housing sleeve 48 is engaged over the boss32 to. mesh gear 37 with idlergear54 toplace the motor and tool arbor inoperative relation. The

motor and gear, housing areithen placed on e fr wit i he ,motorre tihg the d e ribs 2, v -a' 91 3' dt forwa dehd of the gear housing restingon the .rib 15 and the strap 41; placediover the motor and the securing member .44 sprung into placei to firmly bind-themotor in position. 'Therring 50 is thenswung overthe gear housingand the knurled nut53 threadedpn the screvv' 52,

when the -machine isj ready foroperationg While the strap, 4113151 holdsfthe motor against longitudinal movem'entin theframe, it will be apparent that .the'frame is divided into a motor andfa gear housing section by the rib 14. which registers with the; space between the gear and motor: housings so that in the event the strap 41 becomesloose the 7 motor can shift only in thespa'ce betweenjthe rib 14 and the rear-wall; 3 9 Likewise-the gear housing cannot move out- Wardlyby reason of the flange 70 between which and the rib 15 the depth ring 64 is mounted. Inward shifting of the gear housing is prevented by v the inner end of the collar48 striking themotor end capand'also by the'rib'l i.

As the setting and general operation of a portable saw device of this character is described in detail in my Letters Patent abovementioned, further description thereof is deemed unnecessary and from the foregoing description taken in connection with the accompanying drawings it will bereadily 0bvious to those skilled in the. art'to which an invention of this character appertains that outer endfprojeeted therebeyond to. receive a cutter, a drivechuck carried by the motor,

and extended into the gear housing,'a drive spindle detachably securable in said chuck, a drive gear carried by said' spindle, and a drive connection between said gear and tool arbor, longitudinal movement apart of the gear housing and motor afterthe release of their securing means breaking the operable connection between said gear and tool arbor.

saw, a framemember, a drive motor mounted in theframe member, atool arbor,"a,dr1veconnection between; the toolf arbor and the.

drive motor, a cutter fixed on the end of the tool arbor, :a handle 7 member detachably.

mounted on the frame member adjacent the cutter, and a finger guard formed integral with the handle member and lying substantially in the plane of the cutter.

In testimony whereof I aifix my WILLIAMP. CASEY,

transverse arcuate, ribs forming a cradle, a drive motor adapted to be mounted on the intermediate ribs and the rib atoneend, a

boss on the inner end of the motor,-a gear .I housing having a central bearing adapted to rotatably receive the motor boss, said gearf housing outerend being rotatable on the cradle rib at the other end of the frame, means for readily removably securing the motor on its cradle, amember hingedly connected to one end of the rib mounting the gear hous-" in g, means for adjustably connecting said member with the other end of 'said rib to pro-, vide a bearing for the gear housing outer end which is adjustableto bind the, housing against rotation, a tool arbor eccentrically journaled in the gear housing and having its outer end projected therebeyond to receive a cutter, and a drive connection tool arbor and motor.

between the p a device of the. character describe 7 a frame member having end and intermediate 7 transverse arcuate ribs forming a cradle, a drive motor adapted to be mounted on the intermediate ribsand the rib at one end, a'

boss on the inner end'of the motor, a gear housing having a central bearing adapted to rotatably'receive the motor boss, said ,gearhousing outer end being rotatable on the cradle rib at the other end of the frame, means for readily removably securing the motor on itscradle, a member hingedly connected to one end of the rib mounting the gear housing, means adjustably connecting said member with the other end of said rib to provide a bearing for the gear housing outerfend which is adjustable to bind the housing against rotation, a tool arbor eccentrically j ournaled'in the gear housing and having its signature. 1 s

-iic-" 3. -In combination With. a portable hand