US766799A - Miter-box. - Google Patents

Description

PATENTED AUG. 2, 1904.

P. H. RICHARDS.

MITER BOX.

APPLICATION FILED 11.411.112, 1904.

2 SHBETSSEBET l.

NO MODEL.

im 50' 1W IIIIIHH No. 766,799. PATENTED AUG. 2, 1904.

F. H. RICHARDS.

MITER BOX.

APPLICATION FILED MAR. 22, 1904.

H0 MODEL. 2 SHEETS-SHEET 2.

Wifi/2 53.35.- In wg Patented August 2, 1904.

UNITED STATES `PATENT OEEICE.

FRANCIS I-I. RICHARDS, OF HARTFORD, CONNECIICUT, "ASSIGNOR TO THE STANLEY RULE Sc LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNE TICUT INTER-BOX.

SPECIFICATION forming part of Letters Patent No. 766,799, dated August 2, 1904.

Application filed March 22, 1904. Serial No. 199,332. (No model.)

To 1J/Z whom, it 'may con/cern,.-

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and usefu l Improvements in Miter-Boxes, of which the following is a speciiication.

This invention relates to and has for an object to provide an improved miter-box, and

Io has particular reference to means for precisionizing and holding the beam-arm relatively to thetable of the miter-box.

In the drawings accompanying and forming a part of this specification, Figure 1 shows a I 5 central cross-section of a miter-box embody- Y ing the present improvements. Some pertions of the box are shown in end view. Fig.

2 is a top view thereof with a portion of the board upon the table broken away. Fig. 3

zo is a top view of a portion of a beam-arm.

Fig. t is a side View thereof, partly broken away and showing a portion of the table.

The locking mechanism is shown in its locked position. Fig. 5 is a view similar to Fig. 1,

2 5 but showing the locking mechanism in the unlocked position. Fig. 6 is a perspective view of a form of clampingblock. Fig. 7 is a perspective view of a form of bolt or locator.

Fig. 8 is a perspective View of a form of ac- 3o tuator. Fig. 9 is a detail, partly diagrammatic, showing the bolt in its locked position and the relative position of the actuating' parts of the actuator when the bolt and` clamp are in their locking positions; and Fig. 10 is a 3 5 similar view showing the parts when in their unlocked positions.

The present improvement is illustrated in connection with the various parts of a niiterboX, which will be rendered peculiarly cilicient thereby. A frame (designated in a general way by 15) is shown, and which frame embodies in its iioor portion the trussed feature described. and claimed in my copending application for United States Letters Patent,

Serial No. 17 5,425, iiled October 2, 1903, for frame for miter-boxes, and which frame in the present instance has a door portion 16, aback portion 17, having a saw passage-way 18, and feet 19, attached to the ends of the trussed portion, which also carries a segment 20. A board 21 may be placed upon the floor to form a surface for receiving the work and preventing contact of the saw with the metal of the frame.

Saw-guides (designated in a general way by 5 5 25) are carried by a beam-arm, (designated. in

a general way by 26,) which beam-arm is fastened by a pivot 27 to the frame of the table, the pivotal axis being in the plane of the back portion 17 of the frame. The saw-guides may 60 be capable of adjustment after the manner called for in my copending application for. United States Letters Patent, bearing Serial No. 175,421, liled October 2, 1903, for locking mechanism, the beam-arm as herein illustrated having a saw-guide socket 28 at the rear end and saw- guide sockets 29 and 30 at the front end, permitting the base 31 of the front saw-guide to be stepped from one position or station to another, and the upper portions of the saw-guides may be steaded by a connecting-bar 32, provided with adjusting means comprising set-screws 33 after a manner analogous to that contemplated by my application for United States `Letters Patent, Serial No. 17 5,428, liled October 2, 1903, for saw-guides.

The frame is shown as having a face bear ing upon a face of the beam-arm, in the present illustration a face 35 upon the segment 20 80 engaging a face 36 upon the beam-arm, and in the face upon the table there are shown a number of notches or recesses 37, and such table also carries a clamping-face oppositely disposed relatively to the face bearing upon the beam-arm, and which in the ypresent instance is a face 38, foi-ined` by a groove in the back portion of a iiange upon said segment. These faces and notches are adapted for cooperation with clamping, locating', and 90 bolting mechanism having action somewhat resembling that shown in my application above referred to, Serial No. 175,421, and acting in a similar manner, the present illustration of the mechanical embodiment comprising a clamping-block 40, having a channel in its side, making a lug projecting into the groove of the segment, and having a face 41. in engagement with the face 38 on such segment. A bolt or locating indexer (designated in a general way by 45) is here shown carried by the beam-arm, as in such aforesaid application, and substantially parallel to said block, and is carried by an eccentric bushing 46, having screws 47 to turn the bushing to precisionize the indexer relatively to the notches. This is substantially similar to the device shown in my application for United States Letters Patent, Serial No. 175,422, filed October 2, 1903, for precisionizer for index-pins.

The block and bolt, which in certain aspects may be regarded as a pair of bolts, are in the present showing arranged adjacent to each other and movable in parallel lines and acting in opposite directions. In the present embodiment of my invention the bolts are controlled by a rotary actuator, somewhat after the manner of the device set forth in my application for United States Letters Patent, Serial No. 175,426, filed October 2, 1903, for miter-boxes, and this application is in part in the nature of a divisional application thereof, the present invention showing a bolt and a clamp controlled by one movement of a single rotary actuatorwhich actuator in the present instance comprises a shaft 50, lhaving a portion 51 for the engagement of the operator and carried adjacent to such end by a bearing 52, permitting vibration of the shaft. The bolt 45 has at its lower end a bearing 53 to receive a bearing-surface 54 of the actuator,

which also permits vibration of the shaft, and` in the present instance is shown as barrelshaped, and the end of the actuator is provided with an eccentric pin or crank 64, so connected to the clamping-block that the shaft may have lateral movement and may be re-4 ceived by a slot 55 in the lower end of the clamping-block. The actuator-shaft has, as was above stated, a bearing or support at one end to permit it to rotate and to move trans-y versely or angularly to the axis of such rotation. The bearing 53 54 and the bolt 45, having a working fit in its socket, control such transverse movement, so Ithat a point within said bearing will move on a line parallel to the axis of said bolt. The crank-pin 64 will upon the rotation of the shaft-actuator move the bolt 4() to the limit of its stroke, and the walls of the slot 55 will thereby be held stationary and become fixed abutments, 6o"- `ator by a set-screw 58.

a line from the center of the bearing 52 to the center of the bearing 55, constituting the axis of rotation ofthe actuator-shaft, rotation on such axis will first move the bolt 40 and bearing 55 to a fixed position, and upon the continuation of such rotation the bolt 45 will be moved in a direction opposite to that in which bolt 40'was moved during the first portion of such rotation. A coiled spring 56 surrounds the actuator and has an end bearing against an abutment upon the arm, and the other end of the spring may be held by some convenient means on the shaft. In the present instance it is shown as entering a collar 57, whichmay be adjustably held upon the actu- .The collar may be provided with a number of holes or engaging surfaces 59, whereby a spanner may be employed for bringing the spring to the proper tension before the set-screw is tightcned.A The shaft is so mounted in the bearing 52 that it may have a certain amount of vibration, to permit which the shaft and bearing have a loose fit. In the illustration the loose t is afforded by the back end ofthe bearing being made flaring, which with a form of loose bearing at the bolt will permit the inner end of the shaft to rise and fall as it is oscillated'on its longitudinal axis. The crankpin 64 will, owing' to the limited amount of movement allowed the clampingblock, traverse the slot in the same and induce the shaft to rise and fall.

It will be seen that a single spring may be 'employed for controlling and throwing the Vunlock the parts, it being of course understood that the timing of one of such bolts relatively to the other will be such that the locator will be free to respond to the action of the spring and enter the hole or notch in the frame before the clamping action of the block is permitted, which means enables the workman to shift the beam-arm until the same reaches the proper position, when the pin may be released by the return rotation of the actuator suiiiciently to permit it to enter one of the recesses, but during the time when the block is held from its action. In Fig. 9 it will be seen that when the parts are in their located or clamping position the two bearings upon the actuator, the crank, and the barrel portion will be at substantially a dead-center, whereby the parts are not only held by the spring tension, but are also locked by such dead-centering, the dotted line 60 showing'the true dead-center and the line 61 showing the approximate position the parts will be in when the locking IOO IIO

is had. The last portion of the movement of the actuator' in the locking gives a wedging i or jamming engagement oi' the parts, so that the spring after it returns the parts to the locking position also continues to act until it jams itself against the parts and also adds to the eiliciency of the lock, it being' dicult after the spring has forced the actuator to the locking position for jarring' or accidental means to even shift the parts slightly in their action. The actuator may be returned by hand and the parts forced into the jamming' position and thei'e retained by such jamming assisted by the tension of the spring.

lt will ot course be apparent that changes p The apron and truss-frame shown and de` scribed in this application are claimed in thel said application Serial No. 175,425, and the cooperating clamp and index-pin are broadly claimed in said application Serial N o. 17 5,421.

Having thus described my invention, I claiiii w l. Ina miter-box the combination with a work-positioning member and a saw-carrying member, of a pair of bolts carried by one of them, an actuator for said bolts mounted so as to be capable oi' both a rotary and a transverse motion and having a concentric portion carried by a bearing in one bolt and a crank carried by a slot in the other bolt and adapted to lock the bolts when the crank is moving onto the dead-center and to unlock` the same when moving off the dead-center, and to jam the parts when approaching' the dead-center.

2. Two members one movable relatively to the other, one adapted to position the work and one to guide a saw, a pair of adjacent bolts to hold the said members together and effective when impelled in opposite directions; a'n actuator-shaft mounted so as to be capable oi' both a rotary and a transverse motion and a bearing therefor remote from the bolts; bearings on the bolts; a concentric bearing portion on the actuator in one bearing, and an eccentric bearing portion on the actuator in the other bolt. l

3. In a initer-box the combination with a table, of a saw-guide carrier swiveled thereto and carrying saw-guiding means; a pair of bolts mounted in said carrier in substantially axial parallelism and shiftable upon their axial line and `.adapted one to engage recesses in a face of lthe table and the other to engage an oppositely-directed face thereon; an actuator `common to both said bolts to shift them in either direction and at the same time in opposite directions on'pai'allel` lines; and

yieldable means to cause said actuator to normally impel the bolts toward their locked positions.

4. In a miter-box the combination with a table, of a saw-guide carrier pivoted thereto and carrying saw-guiding means; a pair of bolts mounted on said carrier and adapted one to engage recesses in the table and the other to hook over a guide-surface thereon, boltrecesses and aguide-suriace upon the table for the respective bolts, yieldable means normally tending to throw said bolts in opposite axial directions for operative engagement acting exclusively through a common positive means which may be operated to withdraw said bolts from activity by movement in opposite axial directions.4

5. The combination with a work-positioning member oi saw-guides, means to carry the saine and pivoted to the said member; a rotary actuator carried by said saw-guide-carrying means and mounted so as to be capable of both a rotary and a transverse motion;

a pair of bolts contiguous one to the other and axially parallel and transverse to the axis of the actuator, all oi said axes lying' in the saine plane; and a bearing for said actuator coin- `paratively remote from said bolts, and bearings for. the actuator in said bolts, the bearingsuri'aces of the actuator in said bolts being eccentric one to the other.

6. In a miter-box the combination with a table and a beam carrying saw-guides pivot'ed thereto, a pair of axially parallel bolts adapted to hold the saine together, and effective when impelled in opposite axial directions, an actuator-shaft mounted so as to be capable of both a rotary and a transverse motion and having a bearing in each, one eccentric tothe other, and a bearing remote therefrom.

7. In a miter-box the combination with a frame and a beam-arm pivoted thereon, and carrying saw-guiding means, o'lE a bolt shiftably mounted on said beam-arm and having a clamping-face directed toward said beam-arm, i

said frame having a portion interposed between said face and the beam-arm, a bolt carried by the beam-arm and adapted to engage the face of the frame adjacent to the beamarm, an actuator adapted upon movement in one direction to cause both said bolts to as- IOO IIO

iig

IZO

ing portions eccentric to each other carried thereby and mounted so as to be capable of both a rotary and a transverse motion; and means to put such bearing portions upon substantially a dead-center to hold the bolts in locked position.

9. In a miter-box the combination with means to hold the work and a saw-carrier pivoted thereto, of an actuator mounted on such carrier and mounted so as to be capable of both a rotary and a transverse motion; a pair of bolts also mounted thereon and shiftable transversely of the aXis of rotation of such actuator; a bearing in each bolt; and engaging faces on the actuator, for the respective bolts, eccentric to each other and to the said axis of rotation.

lO. In a miter-boX having means to position the work and a pivoted saw-carrier, the combination with a clamp movably mounted upon the carrier for clamping the same in position, of a bolt movably mounted upon the carrier to secure the same in position, and a common means for exclusively operating the bolt and clamp relativelyT and inversely but not necessarily coextensively.

11. In amiter-box having' means to position the work and a pivoted saw-carrier, the combination with a clamp, of a bolt to secure the carrier in position, and springcontrolled means to actuate the clamp and the bolt in positive relative timing, one to the other.

12. In amiter-boX having means to position the work" and a pivoted saw-carrier, the combination with a clamp and a bolt for securing the carrier in position each independently movable one relative to the other and to the carrier, and a single spring to move and control said clamp and bolt.

13. In a miter-boX, the combination with a table having a guide-face and an oppositelydirected clamping-face, of a beam-arm pivoted thereto having a guide-face running upon the said guide-face on the table; an actuatorshaft carried by the beam-arm and having a bearing thereon permitting it to vibrate, and also having an eccentric portion; a clamp carried by the beam-arm to engage said clamping-face and draw the said guide-faces together and also having faces to engage the eccentric portion of the actuator-shaft, and constituting a bearing therefor, but permitting the shaft to change its lateral position; a locator carried by the beam-arm to run upon the guide-face on the table and having a bearing embracing the portion of the shaft eccentric to said portion engaged by the faces upon the clamp; said locator and clamp having movements on substantially parallel lines, and operative when moving in opposite directions.

14. In a miter-box, the combination with a frame of a beam-arm pivoted thereto, a rotary shaft carried by the beam-arm and having a bearing permitting it to vibrate and having a portion eccentric to the portion in such bearing', a pair of bolts each having a bearing for the shaft, one of such bearings permitting the shaft to vibrate and the other of such bearings engaging the eccentric portion of the shaft and permitting it to change its lateral position.

l5. In a ruiter-box the combination with a work-table, of a beam-arm pivoted thereto; a shaft carried by a loose bearing upon the beamarm whereby the shaft may vibrate; a bolt carried by the beam-arm and adapted to enter recesses in a face of the table; a clamping-bolt carried by the beam-arm and adapted to engage a clamp-face upon the table; recesses and a clamping-face for said bolts upon the table; one of such bolts being' provided with a bearing to embrace the shaft, the shaft at such portion being substantially barrel-shaped; a transverse groove in the other of such bolts; and an eccentric-pin on the shaft engaging such groove; and a spring to return such shaft to its locking position, the organization being such that when the barrel portion and the pin are substantially on dead-center the parts will be jammed in their locked position.

16. In a miter-box, the combination with a frame of a beam-arm pivoted thereto and carrying saw-guides, a pair of locking devices carried by the beam-arm and effective when moved in opposite directions to lock the same in place, an actuator-shaft carried by the beamarm and having bearing portions one eccentric to the other and each engaging one of said devices.

17. In a miter-boX, the combination with a frame of a beam-arm pivoted thereto, sawguides carried by the beam-arm, a pair of locking devices carried by the beam arm and adapted to lock the same to the frame, one of which is effective when thrown and the other of which is effective when drawn, and a rotary actuator carried by the beam-arm and having two bearing portions one eccentric to the other and each engaging one of said devices, the 0rganization being such that when the eccentric bearing portion is on a dead-center with the other bearing portion such devices will be locked in their thrown and drawn positions respectively.

18. I n a device of the character specified, the combination with a frame of a beam-arm swiveled thereto and carrying saw-guides, of a pair of locking devices carried by the beam-arm and effective when moved in opposite directions, a rotary actuator having two bearingfaces engaging such devices respectively, one of which bearing portions is eccentric to the other, the organization being such that the ac-` tuator upon rotation in one direction will unlock the devices and upon its rotation in the opposite direction will lock the devices, and when the eccentric portion is substantially on IIC :t dead-center to the other portion said devices will be jammed in their looked positions.

19. In n miter-hox having means to position the work and a pivoted saw-carrier, the com bination With a clamp movahly mounted upon the saw-oarrier, of a bolt to secure the Carrier in positionand movably mounted thereon, and means to positively move said clamp and. bolt into and out of their respective active positions. 1o

Signed at Nos. 9 to 15 Murray street, New York, N. Y., this 18th day of March, 1904.V

FRANCIS H. RICIEIARDS. Witnesses:

CHAs. LYON RUssnLL, FRED. J. DOLE.

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