Portable key-seat cutter
US 390306 A
Description (OCR text may contain errors)
(No Model.) 2 sheets -she'et 1.,
PQRTABLE KEY SEAT CUTTER. No. 390,306. Patented 001;."2, 1888.
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.PORTABLE KEY SEAT CUTTER.
No. 390,306. Patented 001;. 2,1888.
IIIIIII a 1111 m 'm' ml @1 1 UNiTEn STATES PATENT Orrica.
IIIATTHEW' MORTON, OF DETROIT, MICHIGAN.
PORTABLE KEY-SEAT CUTTER.
SPECIFICATION forming part of Letters Patent No. 390,306, dated October 2,1888.
Application filed November 4,1887. Serial No. 254,302. (No model.)
To all whom it may concern:
Be it known that I, MATTHEW MORTON, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Portable Key-Seat Gutters; and Ideclare the following to be a full, clear,and we act description of the same, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.
My invention consists of the combinations of devices and appliances hereinafter specified, and more particularly pointed out in the claims.
In the drawings, Figure 1 is a view in side elevation of a machine embodying my invention in use cutting a key-seat in the hub ofa wheel. Fig. 2 is a rear elevation of the said machine with the rack-bar removed. Fig. 3 is a plan view of the machine. Fig. 4 is a view of a variation. Fig. 5 is a cross-section on the line a w of Fig. 1. Fig.6 is aseparate view of that portion which bears the rack-bar and cutter. Fig. 7 represents a detachable clutch for engaging or disengaging the drivewheel and its shaft.
Heretofore in machinery for making keyscats the machinery itself has been of a permanent and cumbersome character, and it has been necessary to move the pulley-wheel or other object to be cut and place it upon the bed of the machine, thus requiring a vast amount of heavy handling and the consumption of valuable time. This has been especially true in the case of large pulley-wheels, such as are employed upon stationary engines, drive-shafts, 85c.
It is the object of my invention to provide a key-seatcutting machine portable in its character and adapted to be moved to any point where it is desired to form a key-seat in a pulley or to do similar cutting, the said machine being provided with means for ready adjustment upon the article to be thus out.
To this end A may represent the hub of a pulley-wheel in which it is desired to out a key-seat.
B represents the supporting-frame of my improved machine, one portion of which is adapted to project down into the hub to be cut, and another portion projects out horizontally and is provided at its end with a cross head, B.
G is a traveling frame which carries the rack-bar D, to which the cutter Dis attached, and an upright portion of this frame 0 also forms the supports or bearings for the neces sary drive-shaft E and gear-wheels E E E. The horizontal portion of the frame 0 is dovetailed or otherwise engaged upon the horizon tal arm of the frame B, so as to slide freely thereon.
F is a feedscrew threaded through thehead B and impinging against the frame 0 for feeding the frame forward and the cutter to its work.
G represents a rod or bar passing the head B, and provided at its inner end with a shoulder, G, adapted to engage within the hub. A nut, G is provided for exerting the tension on the rod, and thus to crowd the vertical portion of the frame B firmly against the interior of the hub.
O is an arm or backing attached to the frame 0 by a bolt or bolts 0. This arm 0 projects downward and forms a backing or resistance for the lower portion of the rack-bar, which bears the cutter D.
H is a wedge, adapted by means of the rod and nut' H, or other convenient means, to be adjusted downward, and so wedge the lower part of the frame B firmly against the interior face of the hub.
The edge I) of the frame B may be slightly inclined from top to bottom, corresponding with the usual incline of the bottom of a keyseat.
The operation of the machine will now be understood. If a key-seat is to be cut in a pulley, A, the machine is taken to the locality of the pulley, and the vertical portion of the frame B is introduced into the hub. The shoulder G of the rod G- is also engaged within the hub. The nut G is then run down until the rod G has forced the frame B firmly against the interior face of the hub. The wedge H is also brought down, so as to assist in forcing the frame B to a firm bearing. The inclined face I) will then rest against the inner surface of the hub adjacent to the portion where the key-seat is to be cut. The rack-bar being at its lowest point, its carrying-frame O is forced forward by the feed-screw F sufficiently to give to the cutter its proper bite. Power is then applied to the pulley e, which, communicated through the drive shaft E and the gearwheels E E E causes the rack-bar D and cutter to travel upward. As before explained, the face b is inclined toward this travel of the cutter just enough to cause the cutter to cut a little deeper at one end of the hub than at the other, corresponding with the usual incline for such a key-seat. After the cutter has com pleted its upstroke the set-screw is reversed slightly to permit the cutter to descend freely. It is then set forward, so as to give the cutter another bite, and the operation is repeated until a proper depth of out has been obtained.
A scale, I, and an index-finger, 1, may be provided for indicating to the workman just the depth of cut he may desire to give to the cutter.
In Fig. 3 there is shown projecting from the frame G, through the head B, rods J and K. The rod J is threaded at its outer end and provided with a hand-nut, J,while the rod K is provided with a spring, K. The purpose of this construction is as follows: WVheu it is desired to feed the frame 0 forward, the nut J is loosened a distance corresponding to the distance of the desired feed. The feed'serew F is then run forward until it is stopped by the nut J impinging against the head B. Now, in order to permit the cutter to drop freely, the feed screw F is run back, and the spring K serves to cause the frame B to follow the screw back. The nut J may be then turned back to correspond with the new bite of the cutter and the operation be repeated.
Now, referring to Fig. 2, the drive-pulley e may be engaged with its shaft E by a clutch, which can be readily thrown in or out of gear. NVhen the clutch is in gear, the shaft will turn with the wheel. When it is thrown out of gear, the wheel will turn freely, and the shaft is free to reverse and turn in the opposite direction, as it would at once do by the weight of the rack-bar D. t-er has reached the upper end of its stroke the said clutch may be disengaged. The weight of the rack-bar D. would cause it to drop quickly to the bottom of its stroke and bring the cutter into position for a new bite. Such a clutch mechanism is shown in detail in Fig. 7, in which L represents a clutch engaged with the shaft, so as to slide thereon by a spline-andgrooved connection, in the usual way, and L is a lever for throwing it into or out of engagement with the drive-pulley.
I do not of course limit myself to any particular form ofclutch mechanism, for a friction-clutch might be employed, or any one of a variety of well-known appliances might be used for this purpose without departing from my invention.
Power may be applied to this device by means of a cable or belt in the usual manner In this way when the cut-.
with tools of this character, there being the ordinary appliances for lengthening or shortening the belt, according as the tool may be desired for use at a point nearer to or farther from the shaft by which the machine is driven.
A tool of this description, being thoroughly portable, may be carried to any point desired, where the work is lying ready to be provided with its key-seat, and it is immaterial whether the pulley or other device be lying in a perfectly horizontal position or not, since the tool will under any circumstances adjust itself perfectly to perform its work, and will perform it just as readily in one position as in another, it being preferable, ofcourse, that it should stand sufficiently erect to permit the rack-bar D to drop by gravity, for otherwise it would be necessary to return it by hand or to reverse the motion of the drive-pulley for that purpose.
In Fig. 4 is shown a modification of the invention, in which the upright arm of the frame 0 is made adjustable about its lower end, the said lower end being pivoted to the horizontal portion of the said frame 0.
If made so adjustable, it may be supported by a brace, M, and this brace may have an index finger, m, which may indicate upon a scale, m, the exact adjustment that has been made. It is apparent that the adjustment of this upright arm would determine the amount of taper or incline given to the bottom of the key-seat that is being cut, and it is also apparent that if the upright arm is adjusted to the left the cutter will cut deeper at the beginning of its stroke than at the end of its stroke, while if the arm is adjusted to the right it will cut a key-seat shallow at the beginning of its stroke and deeper at the upper end of its stroke. \Vhen the machine is provided with this adjustable upright arm, theinclined face 1) (shown in Fig. 1) may be dispensed with, for the adjustable arm is designed to accomplish the same purposeasthesaidinclined face.
There are many details of construction in this device which may be considerably varied without departing from my invention-"as, for instance, instead of a feed-screw, F, the said feed may be accomplished by a cam-lever or any other like device, and if accomplished by a lever the lever may be so engaged with the head B and traveling frame 0 that when forced in one direct-ion it will feed the said frame forward and when forced in the opposite direction will draw the said frame backward, in which event the spring K might be dispensed with. So, also, where the rod J and hand-nut J are employed the scale I and index-finger I might be dispensed with, or both may be employed together, if desired. So, again, the wedge H might be displaced and the cam or eccentric be employed for the same purpose, the purpose being simply to wedge the frame firmly against the face to be out; nor do I limit myself to the use of the gear-wheels E, E and E, for it is manifest ICC that this part of the mechanism admits of many variations, the sole purpose being to communicate the motion of the drive-shaft either directly or indirectly to the rack-bar D.
What I claim is 1. A portable key-seat cutter consisting of a supporting-frame for engaging the article to be cut, a horizontally-sliding frame on said supporting-frame, a reciprocating cutter-bar carried by the sliding frame and moving on the supporting frame, and a rotating feedscrew engaging the supporting-frame and the sliding frame to force the latter, with its outter-bar, forward to make the desired cut, substantially as described.
2. A portable key-seat cutter consisting of a supportingframe having a horizontal portion to rest on a wheel and a vertical portion to enter the wheel-hub, a horizontally'sliding frame on the horizontal portion of said supporting-frame, a vertically-reciprocating cutter-bar arranged to move in the sliding frame and in the vertical portion of the supportingframe, and a feedscrew engaging the outer end of the horizontal portion of the support ing-frame and acting on the sliding carriage to force the latter with the cutter-bar forward to make the desired cut, substantially as described.
3. In a portable key-seat cutter, the frame B, provided with a vertical arm for entering a hub and a horizontal arm, and in connection therewith a rod, Gr, whereby the said frameis forced and held against the surface to be cut, substantially as and for the purpose described,
4. A portable keyseat cutter consisting of a frame, B, having a horizontal arm and a vertical arm, the latter adapted to enter a wheelhub, a sliding frame, 0, on the horizontal arm of the supporting-frame, a reciprocating cutter-bar, D, 011 the sliding frame, a Wedge, H, beside the vertical arm of the supportingframe, and a screw and nut, H, engaging the lower end of the said vertical arm and c0nnected with the wedge for drawing the latter downward and forcing the vertical arm against the inside of the wheel-hub, substantially as described; I
5. A portable key-seat cutter consisting of a supportingframe, B, having a horizontal arm and a vertical arm, the latter adapted to enter a wheel-hub, a horizontally-sliding frame, 0, on the horizontal arm, a reciprocating cutter-bar, D, moving in the sliding frame and in the vertical arm of the supporting-frame, and a vertically-adjustable wedge, H, for forcing the vertical arm of the supporting frame against the interior of the wheel-hub, substantially as described.
6. The combination, in a portable key-seat cutter, of the supporting-frame B, the sliding frame 0 on the latter, the vertical rack-bar D, the drive-shaft E, geared with the rack-bar, the drive-pulley e,lo0se on the drive-shaft, and a clutch, L, on the drive-shaft for locking the drive-pulley to and releasing it from the driveshaft, substantially as described.
7. The combination, in a portable keyseat cutter, of the supporting-frame B and the slid ing frameG thereupon, having horizontal and vertical portions pivotally connected together for adjusting the vertical part out of perpendicular, substantially as described,
8. In a portable key-seat cutter, the combination, with the traveling frame 0 and its reciprocating tool -supporting bar, of the sup porting-frame B, the vertical leg of which is provided with an inclined face, b, substantially as and for the purpose described.
In testimony whereof I sign this specification in the presence of two witnesses.
M. B. ODOGHERTY, JOHN E. WILEs.