US1713444A

US1713444A - Portable electric tool-driving machine

Info

Publication number: US1713444A
Application number: US281553A
Authority: US
Inventors: Patrick J Moore
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-05-29
Filing date: 1928-05-29
Publication date: 1929-05-14
Anticipated expiration: 1946-05-14

Description

. May 14, 1929. P, J, MOORE 1,713,444

PORTABLE ELECTRIC TOOL DRIVING cam:

Filed May 29,. 1928 s Shets-Sheet 1 o o J6 BY org May 14, 1929. P. J. MQORE v PORTABLE ELECTRIC TOOL DRIVING MACYI INE Fil ed may 29, 1928 s Sheets-Sheet 2 INVENTOR. v

,PJMoore ATTORNEY May 14, 1929. P. J. MOORE PORTABLE ELECTRIC TOOL DRIVING IACHINE Filed May 29, 1928 v 3 sheets -sheet 3 INVENTOR. ,P. LIMOOYQ WM 42m A TTORNEYJ Patented May 14', 1929.-

rarnicx J. moon or BUTTE, momma.

PORTABLE EECTRIC TOOL-DRIVEN G MACHINE.

7 Application filed Kay 29,

The present invention relates to improye ments in portable electric tool dr ving machines, and has for an object to provide an improved machine, of a compact, inexpensive form capable of operating shears, rotatingv sandstones, clothes brushes, screens for powders-and seeds and a variety of other implements.

Another object of the invention is to so constructthe machine as to make rovision fol-detaching one of the-driven implements and substituting another.

,A further object of the invention is to provide for the proper disposition of the electric cable to the motor whereby. not to interfere with the portability of the machine, and its free movement in the application of the tool to the work.

\Vith the foregoing and other objects inview, the invention will be more fully described hereina'fter, and will'be more particularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 .is a side elevation of an improved machine constructed according to the present invention.

Figure 2 is a similar view taken from the op osite side.

igure 3 is a top plan view of the frame of the device.

F igu'r'e 4 is a top plan view of the machine with parts broken away.

Figure 5 is an enlarged cross sectional view taken on the line 5-5 in Figure 4.

Figure 6 is a fragmentary perspective view showing the joint betweenthe frame and removable tool arts.

Figure 7 is also a ragmentary perspective view showing the parts separa Figure 8 is a fragmentary perspective view showing 'the substitution on the machine of a grinding or other roller.

Figure 9'is a similar view showing the application to the machine of a rotary brush, an I Figure 10 is also a fragmentary perspective view with the parts shown disassembled and illustrating-the application. of a sifting device.

Referring more particularly to the drawings 11 and 12 represent respectively the.

fixed and movable blades of a pair of s ears. The lower fixed blade 11 is shown as extend- 1928. Serial No. 281,558.

ing in a forward upwardlyinclined direction while the upphr blade 12 is pivoted at the base of the upright 13 which sup orts, and

may form a part of, the lower fixe blade 11. y

The two blades are thus carried by the upright 13 which in turn is provided with the horizontal shank 14 adapted to detachably fit upon the portable machine.

Figures 6 and 7 show the preferred form of joint. In-these figures, the shank .14 is shown as having at its free end a lateral portion 15 removed; and projecting sidewise from the face of the removed portion 15 is a lug 16,preferably square in cross sectionfor cooperatin with a similarly formed opening 17 in the cooperating frame shank 18. The end 19 of this shank is bev'"- eled and fits against a beveled shoulder 20 on the tool shank 14.

This beveled arrangement assists in supporting the tool from the machine frame.

A clamp, such as shown in Figure 6, is'

adapted to be fitted over the joint to hold the parts against separation. This clamp is composed of the top portion 21, the sides or

legs

22 and 23 and the dome or handle The

legs

22 and 23 are adapted to straddle the joint, as shown in Figures 1 and4. In this position the clamp may beheld frictionally or by other appropriate means. Whenlifted oil, the tool may be removed by sliding the shank 14 laterally, as indicated in Figure 7 and another tool having its own shank may be substituted.

The frame shank 18 is carried by a post or standard 25. This ost is erected on the forward end of one o the spaced parallel frame bars 26. The opposite frame bar is indicated at 27. These frame bars are connected together by the

cross bars

28 and 29 which are perforated or otherwise formed to receive the screws 30 or other fastenings b which the base of the electric motor 31 1s secnred t'o the frame. The

cross bars

28 and 29 are set inwardly from the ends of the

longitudinal bars

26, and 27; and the post 25 is carriedby the forward extension of one of the frame bars 26. This forward extension also carries an inwardly and lattrally with a rearwardly extending bar 36 from which rises a standard 37 carrying the rearwardl" projecting handle 38.

The pa ey bf themotor is shown at 39 and its belt at .40. Thisbelt engages over the-driven pulley 4l having at one side'the eccentric pm 42 for the connection to the link 43, saidlinkbeing also pivotally coupled to the tail piece '44 of the movable scissors blade 12.

The .pulley 41 is mounted on ashaft 45,

"one end of which is fixed in the vertical por tion 46 of an'angle bracket having a horizontal portion; and beneath the shaft 45. This horizontal portion 47 formed with the down-turned edge 48 which extends against the tool shank u the shaft.45 is supported the-verticel shown at 54.

' tricity.

14 to-which it may be secured by ing is a second opening 5 r is adapted tov be engaged screws 'or pp bearing block 49 for the outerend o f upon the shank 14 and between'this bea g part 46 of'the bracket is disposed a 0011 spring 50 which surrounds the shaft 45 and takes up the end thrust or play. A washer 51 may be interposed between the bearing block 49 and the pulley 41.

A washer 52 and nut 53 are shown used to hold the pulley 41 on the shaft The electric current' wires to the motor bther appropriate fastenings. A mg as .45. are These wires extend. up through an'op'ening 55,- shown in Figure 3 asbeing made in an extension plate 56 of the frame opposite to this stud 32-. In this extension plate 56 and alo side the opento receive and support the-lower, end of the bracket standard- 58, shown in Figures 4 and 5. r The upper end of this standard at one side carries a clamp ring 59 for. receiving a plug or wire coupling. The bracket standard 58, which is preferably made from wire. is bent away from the ring .59 into an arm 60 having an upturned endz61 terminating in one ormore convolutionsv 62 forming a ring-through which the wires, indicated at 63 from'th'e-plugpass to the source pf-elec- Ili'Fig'ures 8 to 10 there is shown several other implements which may replace the shears. For instance in Figure, 8 there is shown a grinding or polishing wheel64 having associated therewith a.- pulley 65 which by the belt 40.

The pulley 65 and grinding wheel 64 are carried by the shank 14, which shank is constructed-as a complement to the. shank 18 of the machine frame.

In- Figure 9 a brush 66is shown associated with a pulley 67 for drivi'ngfthe same through the belt 40.. In this the shank 1 4 carries the brush and pulley and is construc jd with'the same form of joint shownin Figures 6 and 7.

In Figure 10 the shank 14 1s shown as shaft in order to retain the drum in place.

extending parallel with block 49 and having the pulley 68 mounted on the shaft 69 which 'is, adapted to' receive the hollow sifting drum" 70,".the drum being'provided with square openings 71 in its heads or ends to receive the square shaft 69 in order to lock the drum to the shaft "and cause the, rotation of the -drum when the pulley- 68 is being driven. A nut 72 is adapted to'be secured. onto. the threaded end 73, of the 75 The drum isprovided with a perforated' periphery 74 through which powder, seed'or. other material may be scattered. In the use .of the device, the machine. is held in one hand b grasping the handle 38. The machine is b 'anced on'the single sup- .portmg wheel 34 which'minimizes-the friction and the effort spend'to propelthe ma chine. The wires-from the house current-or other source are so i osed in the support ing bracket that they can be kept. clear. .of the machine during its movement, The machine is pushed-with the shears or other implements, suchas shown in' Figures 8, 9 and 10,- moving in advance, r.As the machine progresses, the electric motor 31' will drive the shears or'rotate the wheel, brush or sifting device. -A c can readily-be made from one-tool to t e'other b first lifting the clamp 21' and laterallyshi K the shank 14 away from the -companion shank 18; The belt'can now be removed from the pulley and the new] part substituted.

vThe shank of the other tooLis then substi tuted in its place, the clamp 21' replaced and the belt 40 or another belt fitted to theelec tric motor and to the drive wheel of the pulley. The tension on the spring 50 maybe regulated by rotating the nut 53 in one or the other direction. It is as be understood that other. forms of tools may be used than those illustrated. The circular stone 64, shown in Figure 8, may be used for removing rust from'metal surfaces and the machine for this reason be extremelyuseful to automobile ainters. The machine is inex-. pensive in at a single motor sufiiees ,for

. operating a great variety of tools and. the

. use of havmg 231i tool is avoided.

Itis obvious that various changes. and modifications may be made in the details of, construction'and. design of-the above specificallyfdescribed embodiment ofthis" invention'mthout departing from thespirit thereof, such changes and modifications being restricted onlyby the scope pf the following claims. i

What claimed is 1. A portable electric tool driving machine comprising a movable frame, a motor thereojn, a shank on'theiframe having a beveledand cut awayend portionwith' a non-circular perforation laterally therethrough, a tool driven byZthemotor and having 9' shank a complete machine for with a cut awa end portion having a beveled shoulder a jacent thereto and a non-circular lug for fitting in the opening in the frame shank portion, and aclamp for fitting about said shanks at their juncture to prevent lateral separation thereof.

2. A portable electric tool driving machine comprising a movable frame, a motor thereon, a tool carried b the frame, a shaft, a bracket on the tool xedly carrying one end of the shaft, a coil spring about the shaft, a

bearing block extending about the shaft and resting on the tool, and connections between the motor and said shaft for driving the tool.

3.- A portable electric tool driving machine comprisin a movable frame, a motor thereon, a tool aving a shank removably carried by said frame, an an le bracket carried by said shank and offset inwardly, a shaft-having one end fixed to said bracket, a bearing block supported on the shank and receiving theother end of said shaft, a coil spring wound about said shaft between the bracket and bearing block, a pulley mounted on said shaft outwardly of the bearing block, means for retaining the pulley on the shaft and for adjusting the tension of said coil spring, and a belt connection between said motor and pulle y PATRICK J. MOORE.