US514579A

US514579A - Boring-machine

Info

Publication number: US514579A
Authority: US
Publication date: 1894-02-13
Anticipated expiration: 1911-02-13

Description

(No Model.) 2 Sheets-Sheet 1.

, .B. D. WHITNEY.

BORING MACHINE. N0. 514,579. I Patented Feb. 13, 1894.

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(No Model) B. D. WHITNEY. BORING MACHINE. No. 514,579. Patented Feb. 13

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BAXTER I). YVHITNEY, OF VINOHENDON, MASSACHUSETTS.

BORING-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 514,579, dated February 13, 1894.

Application filed May 6. 1892. Serial No.432,048- (No model.)

To all whom zltmaty concern.-

' Be it known that I, BAXTER D. WVHITNEY, a citizenof the United States, residing atVVinchendon,in the countyof Worcester and State of Massachusetts, have invented certain newand useful Improvements in Boring-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines for borin g holes in wood or other material by means of verticallynnoving bits, or boring implements, and it consists of improved means for applying both power to force the bit to the work and a spring for withdrawing or lifting the bit, and ofde'vices for regulating the tension of the spring, and for the guidance and adjustment of the bit spindle, boring table and guiding belt, the, as will be more fully shown in the following description aud t-he aocompanying drawings of which- Figure l a front elevation of the machine. Fig. 2 is partial rear view to showapplication of guide pulleys for belt. Fig. 3 is a view from side of machine partly sectional to show application of lifting spring and its attach ments, also the mechanism of the table.- Fig. at is a vertical section on line a a of Fig. 3, which, looking from the rear of the machine, shows parts for guiding the spindle.

Similar letters of reference designate corresponding parts in the different figures.

A designates a post, column or pillar, constituting the frame-work to which the several parts of the machine are attached. This, as represented in the drawings is conveniently made of cast metal with a broad pedestal or base, to afiord suitable support upon its foundation. At its front are two boxes, or hangings for a vertically moving tubular shaft, or bar B, which carries two arms 0 C, with journal boxes G 0 for a vertical spindle D by which the bit or boring implement E, is held and receives requisite rotary motion through a belt F from a driving shaft G located at the base and rear of the column A. To guide this belt in its somewhat indirect course, two pulleys H H are hung upon properly posi tinned studs or axles, as shown in Fig. 2, attached to a movable hanger I, which depends from an arm projecting rearwardly from the frame A and horizontally adjustable thereon, so that the tension of the belt may be con veniently regulated thereby, thus enabling the use of whole or endless belting and avoiding the necessity of relacing in tightening same.

J is a table for supporting material or articles to be bored, in position for action of the bit. It rests upon a verticallyadj ustable bracket J, whichis connected to the column A by suitable ways J 2 J and is movable thereon to afford proper space for diiferent kinds of work, by means of a screw J operated by a hand wheel, or crank J and bevel gears as shown.

The top-plate of the table is adjustable to different inclinations of its plane, for augular work, by means of curved bearings J J under the same, which are made concentric, or nearly so, to the lines of intersection of the axis of the bit-spindle and the plane of the surface of the table, and it may be secured in any position within its range by means of binding screws J .1 which pass through appropriate slots in one part of the curved bearings to provide for such adjustment of the table, thereby making a very convenient and practical adaptation for many uses.

K is a fender, or shield, connected to the pillar A incasing the belt F, also forming a lateral support and guide for the journal box 0 of the bit spindle; adjustable pieces K K being attached thereto to engage with box 0 for that purpose.

For drawing the bit downward to its work a treadle or foot lever L is pivotally attached by a fulcrum pin L at the base of the column A, and connected to the tubular bar B by a rod M, which has acylindrical nut, or threaded collar M fitted to the screw thread at the upper end of the rod and made to engage with an internal ring, or bushing B attached to the lower end of the bar B, so that by action of the nut M the distance between the bar and the treadle may be lengthened or shortened to give requisite movement of the foot for the work in process.

To withdraw the bit from the work a spiral spring N is incased within the tubular bar B and at its upper end engages with another ring 13 against which it acts to lift the state what I claim as my invention and desire bar and its attachments. At its lower end the spring rests upon a flange, or collar, connected to a rod 0, which rod extends upwardly somewhat above the tubular bar, and is held up by a nut resting on the plate, or collar 0', which receives support from the upper end of the box for the tubular bar. The tension of the spring to balance the weight and friction of its load is adjusted by the thread and nut on the rod 0. This application of the spring and treadle connections, in a direct line of draft, gives an easy and natural action to the operating parts; and avoids to a great extent the lateral pressure, or cramping and friction which there would be were not the power from the treadle applied in direct line of the action of the spring, or lifting power. It likewise makes a very neat and compact arrangement, and adds much to the appearance as well as the utility of the machine.

As the action of the machine is readilyper ceptible from the description given, I will to secure by Letters Patent, as follows:

1. The combination of the column A,avertically movable shaft B supported in bearings on said column and having arms 0 O,carrybeds and secured thereto at desired positions by means of binding screws J J which pass through slots in said curved bearers, substantially as shown and described.

3. A spring incascd in a tubular bar supporting the bit-spindle of the boring machine, substantially as described.

4. The combination of the column A, a vertically movable shaft B supported in bearings on said column, and having armsG O, carrying boxes (3 G a vertical spindle D in said boxes, a boring implement E carried by said spindle, a belt F for driving said spindle, a pulley G and the two pulleys H H hung upon differently placed studs as shown, upon the hanger I, thus enabling the use of an endless belt, substantially as and for the purpose specified.

5. The combination of the column A, a vertically movable shaft B, supported in bearin gs on said column, and having arms 0 O, carrying boxes 0 G a vertical spindle D in said boxes, carrying a boring implement E, a belt F for drivingsaid spindle, a fender or shield K, secured to pillar A and inclosin g belt and also forming a lateral support and guide for boxes, carrying boring implement E, a belt F for driving spindle D, the table J, vertically ad justable'bracket J therefor, connected to column A by ways J J the operating screw J 3 for said bracket, all arranged sub stantially as and for the purpose described.

7. The combination of column A, a Vertically movable shaft B, supported in bearings on said column and having arms 0 O,carrying boxes 0 0 a vertical spindle D in said boxes, carrying boring implement E, a belt F for driving the spindle D, the table J, vertically adjustable bracket J therefor, connected to column A by ways J J the operating screw J for said bracket, the curved bearings J J for the table J, which are made concentric with the line of intersection of the axis of the bit spindle and the plane of the surface of the table, together with the binding screws J 6 J all arranged substantially as and for the purpose described.

8. The combination of the column A, a vertically movable tubular shaft B, the boring spindle carried thereby, a foot lever L connected to the tubular shaft B by rod M, hav- 95 ing a cylindrical nut M, fitted to a screw thread at the upper end of the rod and made to engage with an internal ring, attached to the lower end of shaft B, substantially as described.

9. The combination of the column A, tubular bar B, carried thereby, a boring device carried by said shaft, a spiral spring N within bar B, a ring B" within the upper end of bar B which is engaged by the spring, the lower :05 end of said spring resting on a flange on arod 0, extending up through the upper end of bar B and held by nut O, substantially as described.

10. The combination ofthe pillar A, the ver- 1 r0 tically adjustable tubular bar B, carried in bearings on said pillar, a boring device carried by said bar, a spiral springNwithin the barB and a flanged rod 0 engaging the spring and extending up through the upper end of :15 the bar B where it is held by a nut, and a 'treadle mechanism connected to and operat- BAXTER D. WHITNEY.

Witnesses:

GEO. M. WHITNEY, ELLERY L. HODGKINS.