US 607709 A
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Description (OCR text may contain errors)
Patented July l9, I898.
S. J. SHIMER.
(Application filed Jan. 21, 1898.)
2 SheeiS-SMM 2.
I LEE 2 NlTE i STATES,
SAMUELJOHNSTON SHIMER, OF MILTON, PENNSYLVANIA.
SPECIFICATION forming part of Letters Patent No. 607,709, dated July 19, 1898.
Y Application filed January 21, 1898.
T0 (10% whom, it nuty concern.-
Be it known that I, SAMUEL JOHNSTON SHIMER, a citizen of the United States, residing at Milton, in the county of Northumberland and State of Pennsylvania, have invented new and useful Improvements in Outter-Heads, of which the following is a specification.
My invention relates to improvements in cutter-heads for matching and grooving the edges of lumber of that class or description in which the cutter-head is mounted upon a vertical rotatable arbor or spindle and is composed of upper and lower flanged sections carrying circular cutters and provided with hubs and expansion-springs.
The object of the present invention is to provide an improved construction of cutterhead which shall possess superior advantages with respect to economy in manufacture and efficiency in use.
In the accompanying drawings, Figure 1 is an elevation of a cutter-head constructed in accordance with my invention. Fig. 2 is a longitudinal section of the same. Fig. 3 is a detail view of the locking-key.
In the said drawings the reference-numeral l designates the lower section of the cutterhead, comprising the hollow shaft or tube 2, formed at the lower end with a number of radial flanges 8, two being shown in the present instance, formed in their upper sides with a bit-seat 4. The upper end of this shaft is closed by a bushing 5, formed with a central screw-threaded opening. This bushing may be formed integral with the shaft or may be made separate therefrom and secured thereto, and in its upper side is formed a recess 6, for a purpose hereinafter described.
The numeral 7 designates the upper section of the cutter-head, comprising the hub 8, through which said shaft or tube passes, and formed with radial flanges 9, corresponding with the flanges of the lower section. These flanges 9 are formed with depending bosses 10, in which the lower bit-seats are formed, which engage between the flanges of the lower section and thus interlock therewith. The upper end of the hub 8 is formed with corrugations 11, with which engage the correspondingly-formed corrugations 12 of the adjusting-ring 13, which works on the Serial No. 667,477. (No model.)
screw-threaded portion of the said shaft or tube. Engaging with said screw-threaded portionof the tube or shaft section is a screwthreaded cylinder or cap 14:, provided with an eccentric opening 16 and an opening central withv the cap from the top side through which the top or carrying screw 19 passes to engage with the screw-threads in the top of theshaft-section. This top screw 19, with its nut 20, is of primary use in every cutter-head for adjusting it to the proper level to locate the cut in alinement with the work done by the cylinder-head belonging to the same planer or matcher.
The top screw, with its lower end in touch with the top of the spindle or shaft upon which the head revolves, may be screwed in or out to adjust the head, with its bits, into their proper line of cut, and when such adj ustment is complete the nut 20 is brought down in touch with the top of the cutter-head and becomes a jam-nut to hold the top screw fixedly into its position.
The top of the cap, either flat or recessed, may become a seat for a key or ring 17, provided with a downwardly-depending pin 18,
' which is adapted to pass through the eccentric opening in the top of the cap 14: and engage with a hole 6 in the upper end of the tube or shaft section and thus prevent the cap from turning or changing position, the function of the cap being to limit the space occupied by the adjusting-ring, so that the upper series of bits may not be set out of cutting-line with the lower series of bits to interfere with the clearance of either series in the cut.
It is evident that the function of the top screw and nut is not interfered with by the interposition of the screw-threaded cap and its locking combination. It is also evident that a locking device for the screw-threaded cap is provided by the interposition of the key or ring between the cap to the cutter-head and the jam-nut on the top screw.
The numeral 21 designates the bits or cutters, which may be of any ordinary or suitable construction, and 23 designates spring barrels or sleeves engaging in recesses in the flanges of said sections and provided with coiled springs 24. These features, however, constitute no part of my present invention.
The numeral 25 designates a set-screw passing through the hub of the upper section and engaging with a vertical slot in the tube or shaft 2.
From the above it will be seen that the depending bosses of the upper section will interlock with the flanges of the lower section and that the dividing-line of the cut will be below and out of line withthe division-space between the flanges, thereby preventing such space'from being packed with pitch and resinous matter contained in the wood. The cutter-head sections will also be much stronger than when said sections interlock centrally with the dividing-line of cut.
By reason of the key or locking device and its improved construction the cap can be securely held to the shaft or tube of the lower section, yet will allow of the ready detachment or disconnection of the parts when desired. While I have shown the said sections formed with two flanges and bits, three or more may be employed, if desired.
Having thus fully described myinvention, What I claim is 1. In a rotary cutter-head of the character described, the combination with the lower section comprising the tubular shaft provided with radial flanges form ed with bit-seats countersunk below the upper face of said flanges, of the upper section comprising the hub with flanges corresponding with the 'flanges of the lower section and formed with depending bosses interlocking with the flanges of the lower section and provided with bit-seats, the construction being such that the bit-seats are always below the dividing-space of said sections, substantially as described.
2. In a rotary head of the character described, the combination with the upper section, the lower section, comprising the tubular shaft provided with radial flanges and bit seats, the said tubular shaft formed in its top with a central screw-threaded opening and with a recess eccentric thereto, the top screw passing through said opening and provided with a nut, the screw-threaded cap having a central opening through which said top screw also passes and an opening registering with said eccentric recess, and the key-ring interposed between said cap and the nut of the top screw, provided with a depending pin extending into the eccentric opening and recess to lock said cap in position upon the said tubular shaft, substantially as specified.
3. In a rotary head of the character described, the combination with the upper section comprising the hub corrugated at the upper end and the radial flanges, of the lower section comprising the tubularscrew-threaded shaft formed with a central screw-threaded opening in the upper end and a recess eccentric thereto, the screw-cap provided with a central opening and an eccentric opening registering with said recess, and the key-rin g provided with a depending pin engaging with said eccentric opening and recess, and means for holding said key-ring in place, substantially as specified.
In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.
SAMUEL JOHNSTON SIIIMER.
WV. ll. BECK, II. A. KERR.