US791544A - Feed mechanism. - Google Patents

Description

` 4 SHEETS-SHEET 1.

-IEETENTED JUNE 6, 1905. -W. s. DAVENPORT.

EEED MEGEANISM. APPLICATION FILED NOV. 4| 1901.

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No. 79l,544\ 'PATENTED JUNE 6, 1905.

' PATENTEDJUNE 6, 1905.

W. S. DAVENPORT. FEED MECHANISM. APPLIUATIN FILED Nov. 4. 1901.

No. 791,544.v

SHEETS-SHEET F/aJ. l

/40 TNES .55s,

` 110.791,544. I PATBNTED JUNEB, 1995.y

- W. s. DAVENPORT.

FEED MEGHANISM.

APPLIGATION FILED Nov. 4, 1991.

' 4 SHEETS-SHEET 4.

UNITED STAT-Es y Patented June 6, 1905.

PATENT OFFICE.

WILLIAM S. DAVENPORT, OF NEW BEDFORD, MASSACHUSETTS, ASSICNOR To BROWN AND SHARPE MANUFACTURING COMPANY, OF PROVIDENCE,

RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

FEED MEOHANISM.

SPECIFICATION forming part of Letters Patent N- 791,544, dated June 6, 1905. Application filed November 4, 1901. Serial No. 81,114.

To all whom/ it mag/concern.:

Be it known that I, WILLIAM S. DAVENPORT,

residing at VNew Bedford, in the county of lBristol and State of Massachusetts, have invented certain new and useful Improvements in Feed Mechanisms; and I do hereby declare the following specification, taken in connection with the accompanying drawings, forming a part of the same, tobe a full, clear, and

Io exact description thereof.

The invention relates to that class of machines in which arod of stock,which is rotated about its axis, is intermittently fed forward; and the object of the invention is to provide I5 a simple and efficient mechanism for feeding Vthe stock in such machines. This is accomplished by providing feeding-rolls mounted in a rotary head or support which rotates with the rod of stock and connecting these rolls zo with rotary members which also rotate with the rod of stock and may also be rotated about their axis by engagement with a nonrotary member with which they may be engaged and disengaged. `I/Vith this construction the feed-rolls and their connected rotary members rotate with the stock and do or donot also have a rotation about their axes, according as the rotary members are or are not engaged with the non-rotary member. The 3o engagement between the non-rotary member and the revolving or traveling rotary members causes said rotary membersto be rotated von their axes, which motion is transmitted to the rolls, causing said rolls to rotate and feed 3 5 forward the stock, which feeding movement.

described Jhave been shown merely .as pre-- ferred embodiments of the invention and also for the reason that they embody features of 5o invention in addition to the broad features of invention.

In further describing the invention I will refer to the accompanying drawings, in which mechanism embodying all the features of the invention in their preferred forms is shown in connection with a spindle and chuck suitable for use in a screw-machine or other machine whereinthe stock being operated upon is intermittently lfed through a revolving spindle 6 o and chuck.

In the drawings, Figure l is an elevation, partly in section, showing a spindle and attached chuck provided with feeding mechanism embodying the present invention. Fig. 2 is a horizontal central section 4through the feeding mechanism, the chuck being removed and certain parts being Shown in plan. Fig.

'3 is a sectional view on line 3 3 of Fig. 2. Figs.

ated upon by the mechanisms of the machine in which the spindle is incorporated is fed at 8o v suitable invervals. The spindle may be rotated in the usual manner through a cone-pul- Vley 5, secured thereto, and is-provided with a screw-thread at its forward end, by which a chuck 6 may be secured to the spindle, or the 85 Ychuck may be formed in the end of the spin-A dle and may be of any suitable or well-known construction. The chuck is provided with the usual jaws (not s'hown)'for grasping'the rod of stock and causing it to rotate with the spindle, vand vthe jaws may be operated to grasp or release the stock through any suit-` -able or well-known connections, as by a sleeve 7, mounted to slide on the chuck-body, the jaws of the chuck being opened when theu9`5 sleeve is moved forward toward the front end of carried in an annular groove in the sleeve 7.

The rock-shaft 9 is operated through a segment-arm 12, secured thereto, the outer end of which is provided with gear-teeth engaged by a segment 13, which is connected with an operating hand-lever 14:. In case the spindle is incorporated in an automatic machine the movements of the sleeve 7 will be effected and controlled by suitable automatic mechanisms, as is usual in such machines. The devices thus far referred to may be of any well-known construction, and their operation is as usualthat is to say, during the operation of the devices for acting upon the rod of stock the jaws of the chuck are closed to firmly grasp the stock, and when the stock is to be fed forward the jaws of the chuck are opened to allow such action. The rod of stock is 'fed forward at the proper time by the action of feeding-rolls 15, arranged to engage the stock and mounted in a head or support 16, which rotates with the rod of stock. In the arrangement shown the head or support 16 is mounted upon and secured to the spindle 1 and is arranged within the cone-pulley 5. The feed- 4rollsv thus move with the spindle and rod of stock and revolve or travel about the aXis of the spindle. The feed-rolls are rotated on their axes to feed forward the stock through rotary members mounted in the head 16, so that they also revolve or travel about the axis of the spindle, these rotary members being arranged to be engaged with a stationary or non-rotary member and to be rotated about their axes by such engagement. In the mechanism shown the rotary members are in the form of friction-disks 17 mounted upon studs 18, secured in the head 16, and vthe non-rotary member with which they engage is in the form of a friction-disk 20, carried by or formed on a Vcollar 21, which is mounted to slide on the ,A hub of the cone-pulley. The rotary members and feed-rolls may be connected in any suitable manner, so that the rotation of the rotary members is transmitted to the feed-rolls, and a simple and efficient means for thus connecting these devices is that shown in Figs. 2 and 3. In this construction the feed-rolls are secured to the ends of short shafts 22, upon the opposite ends of which are formed ,spur-gears 23, arranged to engage with pin- Aions 24, secured to the disks 17 In order that the feed-rolls may yieldingly engage the stock and accommodate themselves to variations in f the size thereof, the shafts 22 are mounted in carriers are provided with weighted arms 26 to counterbalance the centrifugal force which would tend to throw the feed-rolls outward as they revolved about the axis of the spindle. The rolls are held yieldingly in contact with the stock by the action of springs 27, which are supported upon the pins 28 on the head and in recesses 29 in the arms 26. Normally or when the feed is not taking place the disk 20 is out of engagement with the disks 17, and neither the disks 17 nor the feed-rolls are rotated about their axes. When the feed is to take place, the disk 20 is moved forward into engagement with disks 17, and as said disks 17 travel about the axis of disk 20 they are rotated and rotate the feed-rolls to feed forward the stock until the disk 2O is moved back to disengage the disks 17, when the rotation of the disks and rolls, and therefore the feed, ceases. The disk 2O may be moved at the proper time by any suitable mechanism; but it is preferred to operate said disk from the mechanism which operates the jaws of the chuck, the connections being so constructed that the operations of the mechanism to open the chuck-jaws moves the disk 2O into engagement with the disks 17 to start the feed, and the operation of the mechanism to close the chuck-jaws disengages the disks to stop the feed. A simple and efficient form of such connection between the disk 20 and the chuck-operating mechanism is shown in the drawings. In this construction the collar 21, which carries the disk 20, is secured in the rear end of a casing 30, which surrounds the head or support 16, and is provided with a ange at its front end mounted to slide on the rear end of the bearing 31. The casing 30 is provided with ears 32, through which rods 33 pass, the rods being guided and supported in bearings 34, secured to the frame of the machine. vA yielding connection between the rods and the casing is provided by interposing springs 35 between the cars 32 and nuts 36 on the rear ends of the rods, the springs tending to hold the ears in engagement with iianges or collars 37, formed on the rods. The rods are pressed rearward by springs 38, which tend to hold the disk 2O out of engagement with the disks 17. The rods are moved forward at the proper times by the action of pins 39, projecting from ears 40 on the arms 8, which pins are arranged to engage projections 41 on the rods. When the arms are rocked forward to open the chuck-jaws, the pins act to draw the rods forward, thus bringing the disk 20 into engagement with the disks 17 after which any further forward movement of the rods compresses springs 35. When the arms 8 are moved in the reverse direction to close the chuck-jaws, the pins allow the springs 38 to move the rods rearward, the collars engaging the ears 32 and carrying the disk 2O out of engagement with the disks 17 In Figs. 6 and 7 I have shown another form IOO of feed mechanism having the same general features of invention and mode of operation as the construction already described, but differing somewhat in specific construction andarrangement. In this construction the feedingrolls l5 are mounted in a head or support 42, se-

cured to the spindle 1, and said rolls revolve or being secu red in the ianges 46 47 of thehead 42. f The carriers are forced yieldingly forward toward the spindle by the action of springs 48, mounted in recesses in the flange 47 and bearing upon pins 49, which project from the car riers through slots 50 in the flange 47 These springs act to resist the outward movement of the carriers, dueto centrifugal force, and also hold the -rolls yieldingly in engagement With the stock, so that said rolls may accommodate themselves to variations in the size of the stock. The rotary members for driving the feed-rolls in this construction are in the form of friction-disks 51, and these disks are connected With the rolls l5 by being secured to the shafts 43. The non-rotary or stationary member with which theseA disks cooperate is in the form of a friction-disk 52, movable into and out of engagement With said disks.

The disk 52 is secured to a collar 53, and this operated in the same manner as already decollar is secured in the rear end of a casing 30, similar to the casing already described, which casing is connected With the chuck-operating mechanism by the same devices and is scribed.

WhatI claim as my invention, and desire to secure by Letters Patent, is-

l. In a feeding mechanism, the combination of a rotary head or support, a feeding-roll carried thereby for engaging the stock, a rotary member connected With said roll, a non-rotary gaging and disengaging said rotary and nonv rotary members.

3. In a feeding mechanism, the combination of a rotaryhead or support, feeding-rolls carried thereby for engaging the stock, rotary 4. In a feeding mechanism, the combination of a rotary head or support, feed-rolls mounted therein and arranged on opposite sides of the aXis thereof, rotary disks mounted in said head and connected With said rolls, and a sliding non-rotary disk movable into and out of engagement With said disks.

5. The combination, with a rotary spindle through which the stock is fed, of feed-rolls mounted to move with said spindle, rotary disks mounted to move With said spindle and connected with said rolls, and a non-rotary disk movable into and out of engagement with said disks 6. The combination, with a rotary chuck and means for operating the same to grasp and release the stock, of a rotary head or support rotating with said chuck, feed-rolls mounted in said head for engaging the stock,

rotary members mounted in said head and connected with said rolls, and. a non-rotary member connected With said chuck-operating means to be moved into and out of engage; ment Withsaid rotary members thereby.

' 7. The combination of a rotary head or support, pivoted carriers mounted in said head, y

feed-rolls mounted in said carriers, rotary ldisks mounted in said head and connected with said rolls, a non-rotary disk movable into and out offengagement With said rotary disks.

8. The combination of a rotary head or support, pivoted carriers mounted in said head, feed-rolls mounted in said carriers, rotary `disks mounted in said head independent of said carriers, gearlng connecting sald disks and rolls, and a non-rotary disk movable into and out of engagement With said disks.

9. rlhe combination, With a rotary spindle, feed-rolls carried thereby, rotary members carried by said spindle and connected with said rolls, a longitudinally-movable casing surrounding said rolls, and rotary members, and a non-rotary member carried by said casing.

WILLIAM' S. DAVENPORT.

Witnesses:

FRANK W. CRAIG, CHARLES MITCHELL.

IOO

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