US1217815A - Drill, hammer, and motor-case combined. - Google Patents

Description

W. S. PAYNE. ORILL, HAMMER, A ND MOTOR CASE COMBINED.

APPLICATION FILED OCT 25, 1915.

Patnted Feb. 27, 1917.

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DRILL, HAMMER, AND MOTOR CASE COMBINED. APPLICATION FILED ocrl 25, 1915.

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WALTER S. PAYNE, OE UNIVERSITY PLACE, NEBRASKA.

DRILL, HAMMER, AND MOTOR-CASE COMBINED.

Specification of Letters Patent.

Patented Feb. 27, 1917.

Application filed October 25, 1915. Serial No. 57,800.

To all whom it may concern:

Be itv known that I, lVALTER S. PAYNE, a

citizen of the United States, residing at University Place. in the county of Lancaster and 4State of Nebraska, have invented certain new and useful Improvements in' Drills, Hammers, and Motor-Cases Combined, of which the following is a specification.

' My invention relatesto a motor casing, having means for receiving and ,holding a tool to be driven by the motor, such as a reciprocatory or rotatable tool, and has for its object the provision of such apparatus, which may 'be conveniently manipulated by a single operator.

An important object of the invention is to provide apparatus of the above mentioned character, which is simple in construction, inexpensive to manufacture, strong, durable, and light.

Other objects and advantagesy of the invention will be apparent during the course of the followingr description.

Ink the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout' the same,

Figure 1 is a central vertical longitudinal sectional view through apparatus embodying the invention,

Fig. 2 is a similar view with parts broken away, and a rotatable tool or drill in place.

Fig. 3 is a transverse sectional view taken on line 3-3 of Fig. 1, parts being omitted, and,

Fig. 4 is an end elevation of the apparatus with the end or head closing the gear casing, removed. c y

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 designates a cylinder lor body portion of the motor casing. Disposed adjacent one end of the cylinder 10 is a head or end 11, carrying an annular flange 12, projecting into the cylinder 10 and secured therein by means of screws 13 or the like. Arranged adjacent the opposite end of the cylinder 10 is a head or end 14, carrying an inwardly projecting annular' flange 15, extending into the end of the cylinder 10 and secured thereto by means of screws 16 or the like. The ends or heads 11 and 14 carry ball bearings 17 receiving 'the ends of an armature shaft 18 having an armature 19 rigidly mounted thereon. Surrounding the armature are the field magnets 20, held stationary upon the cylinder 1Q by any suitable means.

Formed upon the outer side of the head 14, preferably cast integral therewith, is a gear casing 21, the outer side of which isA closed by a removable cap or end 22, having a flange 23, projecting into this gear casing and held in place by screws 24 or the like.

Formed upon one side of the casing or cylinder 10 is a longitudinal member 25, having a recess 2G curved in cross-section. The member 25 receives a longitudinal clamp 27, forming therewith achamber 28, for :a purpose to be described, The ends of the clamp 2S are provided with elongated openings 29, receiving clampingl screws 30 `having screw-threaded engagement with the lug or member 25. It is obvious that the Aclamp 27 may be adjusted transversely with respect to the lug The function of having the clamp 25 transversely adjustable is to provide means for rigidly attaching a ,hammer or the like to the casing 10.

The armature shaft 1S projects into the gear casing 21 and is journaled therein, as shownat 31. This armature shaft carries a small pinion 32, engaging a larger pinion 33, carried by a stub shaft 34, journaled in the gear casing, as shown. The larger pinion 33 engages a larger pinion 35, having an opening 36, which is square in cross-section. This opening is arranged adjacent small and large openings 37 and 38, which are circular in cross-section.

The numeral 39 designates a reciprocatory hammer as a whole, of any well known or preferred construction, such as the hammer shown and described in my pending application for Power operated hammer, Serial No. 16,389, filed March 23, 1915. 7liile this hammer will not be described in detail it will be stated that it embodies a casing 40, adapted to 'be inserted within the clamp 27 and held therein. Arranged within this casing is a rotatable cam 41, which cannot reciprocate and is rigidly mounted upon a shaft 42, having a square portion 43, to fit in the opening 3G and circular' portions 44 and 45, to enter the openings 37 and 3S. The rotation of the shaft 42 drives the cam 41, which contacts with a reciprocatory cam 46, caus- `ing a hammer 47 to reciprocate, and strike a reciprocatory tool 48. The -cam 41 is rotatable but cannot move longitudinally while Vthe cam 46 is movablelongitudinally but cannot rotate. It is obvious that by virtue of the shape of the contacting faces of these cams that the turning movement of the cam 4l will' move the cam i6 rearwardly, While a spring 4G will move it forwardly. The cam #l1 is rigidly attached to the shaft 42.,

ln Fig. 2,-the power operated hammer is removed and a rotatable drill substituted therefor. embodying a rotatable shaft 49,

Y carriedin ball bearings 50, inserted in the clamp 27 and held therein. The shaft 49 is similar in constructlon to the shaft 42 and has a square portion 51 and small and large cylindrical portions and 53, to enter the openings 37 and 38. lt is thus obvious that the pinion 35 will drive the shaft 49. The shaft {if} carries at its forward end a drill chuck 5l. carrying` a drill 55.

-lt is thus apparent that the tool to be operated, either reciprocatory or rotatable,

may he conveniently inserted within the clamp. 27, and connected with the gear 35 for rotation therewith.

In order that the apparatus may be conveniently manipulated, Vthe cap 22' is provided with a cylindrical stud ortrunnion 56,

"titting'in a tubular socket 57 formed integral Pivotally mounted within the casing 59, at (32, is a swinging 'lever 63, the -outerend of which projects outwardly'through a longi-` tudinal slot 6l. This lever is pushed outwardly by a spring 65, as shown. Pivoted within the casing 59, upon a stationary pin vorA member (36 and insulated therefrom is a switch (S7, 'one end of which Ais adapted to engage and disengage a stationary contact (S8. The switch (S7 is provided with a crank G9, rigidly connected therewith and insulated therefrom.' This crank serves to turn the switch (i7 and is moved by `a link 70, pivo'tally connected therewith and with the lever y G3, as l shown.

The nuineral71 designates a source of current, one pole of which is connected with a l wire72, ektending through insulating sleeves 7? and passinglinto the casing 59. The wire, 72 passes through an `insulating sleeve 74 and enters the cylinder 10 and isv connected with one brush 7 5 of the motor. This brush engages the usual commutator 76 engaging the brush 77 of opposite polarity. `The brush 77 is connected with the wire 78 passing through insulating sleeves 79 and 80 `and' connected with the stationary contact'GS.

Having permanent electrical connection with one end of the switch 67 is a wire 81, having electrical connection with the opposite pole of the source of-eurrent. 'v

' The operation of the apparatus is simple and is as follows:

The shaft 42 or 49 of the tool to be operated is arranged withinl the clamp 27and the tool held therein by proper manipulation of the clamp.' The end of this rod or shaft is connected with the gear 35, as is obvious. This'having been done, the tool isbrought into suitable proximity to the work and the apparatus may be' conveniently supported with the left hand while the casing 59 is grasped in the right hand. The lever G3 may be conveniently moved inwardly by the ,thumb `or the like and upon such movement the switch 67 engages the contact (SS. When this takes place current flows from the positive pole of the source of current through wire 72, brush 75, commutator segment, armature 19, commutator segment, brush' 77,

wire 7S, contact 68, switchl (37,. and wire S1,

back to the lopposite pole of thesource of current 7l. rThe armature shaft is a'ccordingly rotated, which rotation is transmitted to the gears 32, l 33 and 35, and the rod or shaft of the tool driven at a reduced speed.

lt is to be understood that the formof my invention herewith shown and described is to be taken as a preferred example of the same, and that variouschanges in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of the invention'o'r the scope of the subjoined claim. 'y Having thus described the invention, I

motor casing and extending downwardly in proximity`to the rear end of the tube, a train of gears arranged within the gear casing and connected `with the armature shaft and the shaft of the tool, a handle secured to the rear side of the gear casing, and ar switch lever carried by a vhandle to control` the operation of the motor.

In testimony whereof I affix my signature in presence of two witnesses. l

WALTER s. PAYNE.

Witnesses:

O. N. SHORE, J. F. JoHNsoN.

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