US529701A

US529701A - Machine for driving screws into wood

Info

Publication number: US529701A
Authority: US
Publication date: 1894-11-27
Anticipated expiration: 1911-11-27

Description

(No Model.) 5-Sheets-Sheet 1.

C. L. BRIGGS. MACHINE FOR DRIVING SGREWS INTO WOOD.

No. 529,701, v Patented Nov. 27, 1894.

1? 30 85 a 0 6 I'll INVENTOIR CZarZesZ. Brgys 5 Shets-Sheet 2.

(No Model.)

0. L. BRIGGS. MACHINE FOR DRIVING SCREWS INTO WOOD. I No. 529,701. Patented Nov, 27, 1894.

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, INVENTOR,

ATTORNEY m: "dams nrrzs 00.. mo-rourna. WAS M010" 0 Q Czar/eel, 5r? 3 BY (No Model.) 5 Sheets-Sheet 3.

. G.L.BRIGGS. I MACHINE FOR DRIVING SUREWS INTO WOOD.

No 529,701. I Patented Nov! 27,1894

INVENTOR CZ/es 34 16 m: uonms PETERS 00.. moruu'ma, WASHINGTON m c.

(No Model.) 5 SheetsSheet 4.

O.L.BRIGGS. MACHINE FOR DRIVING SCREWS INTO WOOD. N0.'5Z9,701. Patented Nov. 2'7, 1894..

WITNESSES:

INVENTOR' g A BYCZar/es Brljffi ms mums versus 00.. mowu'mu. wmunmom u c.

5 Sheets-Sheet 5.

(No Modelfl I .7

. G. L. BRIGGS. MACHINE FOR DRIVING SCREWS INTO WOOD. No. 529,701.. Patented No v. 2'7, 1894.

m: Nonms virus 20.. momurwa" WASHINGTON n c To whom it may concern.-

citizen of the United States, residing at Norton, in the county of Bristol and State of Mas useful Improvements in Machines for Driving Screws into Wood; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable tains to make and use the same.

ful improvementsin machines for driving screws into wood, such screws being autoto the driving devices, and has for its object to accomplish the end aimed at by the use of simple and positive means, such as will be hereinafter set forthand then'specifically is a front elevation of my improved machine. Fig. 2, a side elevation thereof; Fig. 3, a plan View; Fig. 4, a sectional elevation at the line a:w of Fig. 3. Figs. and 6 are detail plan views of the hopper and automatic cut-01f parts in the several figures of the drawings.

cured to its face guides 2 within which a gate 3 is adapted to reciprocate freely.

the other within which is guided and journaled the driving rod 5 to the upper end of which is secured a plain horizontal disk 6. At the top of the gate, on opposite .sides thereof and in the same horizontal plane, are boxes 7 within which is journaled the shaft 8'.

10 which latter is journaled within any suit- UNITED" STATES PATENT- QFFICE.

I CHARLES L; BRIGGS, OF NORTOR MASSAOHUSETTS, ASSIGNOR TO ISAAC J.

BOOTHE, or BIRMINGHAM, CONNECTICUT.

MACHINE FOR DRIVING SCREWS INTO WOOD.

SIIEIECIIEIGIX'1I01\T forming part of Letters Patent No. 529,701, dated November 27, 1894.

Application filed July 17 1893. I

Be it known that I, CHARLES L. BRIGGS, a

sachusetts, have invented certain new and others skilled in the art to which it apper- My invention relates to certain new and usematically selected and delivered one by one designated by the claims.

In the accompanying drawingsFigure l mechanisms, showing respectively the posi- Similar numbers of'reference denote like 1 is the frame of my machine having se- 4 are boxes secured to this gate one above 9 is the power pulley mounted on a shaft Serial No. 480,719. (No model.)

able bearings 11 secured to the frame 1, which pulley is connected by a belt 12 to a pulley 13 on the shaft 8, whereby revolution may be imparted to the latter. and extending longitudinally thereof is 'a channel 14, and on the shaft is a wheel 15 carrying a key 16 which latter extends with-in the channel, whereby said wheel is rigid with this shaft as to rotation, and at the same time is capable ofa free sliding movement thereon. Extending laterally from this wheel is a hub 17 having therein the annular groove 18.

19is arod capable of a free longitudinal sliding movement within supporting brackets 20 which extend upward from the boxes 7, and 21- is a shoe which depends from said rod within the groove 18. The rod 19 is provided with a handle 22 for readily shifting such rod 'to and fro and thereby imparting a corresponding shifting movement to the wheel 15,

and a set screw 23 is provided through one of the brackets 20 for fixing the rod in any desired adjustment. Secured to the wheel 15 is a disk 24 of leather or other suitable material which normally is in contact with the upper face of the disk 6, whereby, when the shaft 8 is revolved, rotary movement will be imparted to the vertical driving rod 5 by the frictional contact of the disk 24 withthedisk 6. By shifting this disk to a point more or less distant from the axial center of the disk 6, the speed of the driving rod 5 may be in creased or diminished, and this is a very desirable feature since it enables the operator to regulate the driving of the screws in ac cordance with the requirement of the occaslon.

- At the lower end of the driving rod 5 and around the same is a yeke 25 which is sustained in position by a collar 26 rigid on said rod. This yoke has a free verticalsliding movement on the rod, but has no connectionwith the latter which interferes with'the free and independent revolution of the same. At the bottom of the yoke is a head 27 which has a central passage 28 for the driving rod 5, and

leading into this passage at the rear thereof is a chute 29 which extends upwardly to the screw delivering devices hereinafter to be explained. Within the sides of the yoke are pivoted at 30 the jaws 31 the ends whereof Within the shaft 8 extend downward and close against each other at a point immediately below the head 27. In the extreme ends of these jaws and in their meeting edges are formed complementary recesses 32, which, when the jaws are closed, present a circular opening through which the shanks of the screws may drop, and these recesses lead upwardly into beveled portions 33 on the inside of the jaws, whereby the under side of the screw heads may be properly supported in position for driving. l

34 are springs secured to the yoke by screws 35 and bearing against the outside faces of the jaws whereby the movements of the latter are rendered resilient.

36 is a bar pivoted at 37 to the rear of the frame and loosely connected at 38 to a plate 39 which extends upward from the gate 3.

40 is a coil spring whose ends are connected respectively to the rear of the bar 36 and to the frame 1, whereby the forward end of said bar, and consequently the gate 3, are returned to their normal or elevated position.

In the operation of the parts heretofore described, the bar 36 is depressed by the operator thereby carrying the screw driver and the screw clamping devices downward, and causing the driver to engage with the screw to drive the same within any suitable wooden object, the latter having been previously brought into position beneath the screw. As the driver forces the screw within the wood, the jaws 31 will distend to permit of the passage of the head of the screw, as shown at Fig. 9, and when the head of the screw is flush with the object into which it is driven, the operator releases the bar 36, thereby causing the driver and the screw clamping devices carried thereby to be returned to normal or elevated position.

Having thus described the operation of the means whereby the screws, when properly delivered, are carried into position and driven, I will now describe the devices whereby such screws are automatically selected and delivered one by one to the driving devices.

41 are brackets secured to the frame of the machine and 42 is a cross block secured to the free ends of such brackets.

43 is an inclined slide plate secured on the cross block 42 and having a guide slot 44 the outer end whereof leads into a chute 45 which latter is rigid with such plate and telescopes within the chute 29. The object of this telescoping of the chutes is to provide an unbroken passage for the screws during the vertical movements of the gate, and also to hold the yoke 25 as against any turning or axial movement around the rod 5.

46 are cars secured to the cross block 42, between which cars is pivoted the

hopper

47, and 48 is a rod whose ends are loosely connected to the bar 36 and the hopper, whereby when such bar is reciprocated the hopper will be swung up and down on its pivotal points. Within the bottom of the hopper is a slot 49 which extends forward and registers with the guide slot 44, the end wall of the hopper being cut away as shown at 50 in order to permit the passage of the heads of the screws, as will be presently explained. hen the hopper has been swung upward to its full elevation by the action of the bars 36, the bottom of the hopper will thereby be brought into the same inclined plane with the side plate 43, and since the slots in these parts are in alignment,acontinuous passage forthe screws will thereby be afforded from the hopper down through the

chutes

45, 29. Within the hopper is a V shaped partition 51 the sides whereof inclose the space within which the screws are placed in mass, while the end or angle part of this partition registers with the slot 49 in the hopper and is slightly elevated to allow the screws to pass beneath the same as they travel along the slot. The object of this partition is to cause the screws to be selected one by one at the angle of such partition and allow them to drop into the slot 49. Of course this partition is not an actual necessity, but it greatly facilitates the proper assembly of the screws within the slot 49, since the great body of such screws in the hopper is thereby prevented from clogging the few screws which are at the angle part of the partition.

From the foregoing description it will be readily understood that the reciprocations of the bar 36 will efiect the agitation of the screws within the hopper for the purpose of i enabling them to drop through the slot 49 in proper position for delivery down through I the chutes.

I In order that the screws may be delivered one at a time to the screw driving devices, so I as to not interfere with each other or clog the passage 28 in the head of the yoke, I have provided automatically controlled devices for cutting out the screws and for delivering them one at a time down the chutes in synchronism with the reciprocating movement of the gate, which devices I will now describe.

52 is a lever pivoted at 53 to the underside of the

plate

43, and 54 is a link whose ends are loosely connected to the hopper and to the outer end of said lever, whereby when the hopper is swung up and down, a to and fro swinging movement will thereby be imparted to the lover. The inner end of this lever terminates in two

curved prongs

55, 56, which approach each other, as shown particularly by dotted lines in Figs. 5 and 6. The prong 55 is slightly in advance of the prong 56, the distance between the two being about equal to the diameter of the shank of one of the screws to be fed, and these prongsalternately cross the mouth of the slot 44 during the to and fro movements of the lever 52. hen the hopper is swung to its elevated po sition the prong 56 will thereby be extended immediately in front of the screws in the slot 44, thus cutting off the supplylof such screws to the chute during theraising of the driving red, but on the depression of the driver and the consequent dropping of the hopper, the prong will be carried immediately behind a screw which had previously rested against the prong 56, thus allowing such screw to drop within the chute. The timing of the action of these prongsis such that'the driver will have descended so as to block the lower mouth of the chute 29 by the time the screw reaches that point, so that when the driving rod is elevated said screw will drop within the passage 28 into the proper position for driving. It will thus be seen that the chute is always free from screws during the elevation of the driving devices and until that time when the descent of the driver has blocked the passage into the head 27. I have employed frictional devices, such as the "disk 6 and the Wheel 15 having secured thereto the disk 24 of leather, for revolving the driving rod, in order that when the screw has been properly driven the disk 24 will simply slip over the disk 6 without revolving the same, but I do not wish to be limited to the employment of frictional devices in this connection as there are very many other ways of revolving this rod all within the scope of ordinary mechanical knowledge and skill. For instance, ordinary beveled gears substituted in place of the

disks

6, 24, would answer the purpose of my invention in this respect, for it is a very simple matter for the operator to determine when the screw has been properly driven andto then release the bar 36. Moreover the speed of the driver may readily be changed by the use of ordinary speed pulleys on the

shafts

8, 10. Also any suitable device, controlled by the bar 36, may be employed for the purpose of agitating the mass of screws within the hopper, or, in fact,'such agitating devices may be entirely dispensed with, since the occasional stirring or shaking of the screws in the hopper by the hand of the operator will accomplish the object aimed at in this connection.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The screw driving rod and means for rotating the same, the yoke connected to the rod,

the jaws pivoted to the yoke and extending near to the axial line of the rod, and the guiding chute terminating in proximity to the jaws, all combined and relatively arranged substantially as described.

2. The vertically movable gate and the rotatable screw-driving rod carried thereby, the screw holding jaws, and the guiding chute, having a terminal section connected to said gate, a hopper, and a telescopic chute section leading from the hopper to the chute section connected to thegate, all combined substantially as described.

3. The vertically movable gate, the power driven screw driver carried thereby, the yoke surrounding and moving with said screw driver, and the telescopic chute connected to a hopper and to said yoke, all combined substantially as described.

4. The combination of the rotatory and vertically reciprocatory driving rod, the yoke loosely supported around the same and confined as to independent vertical movements between prescribed limits, the head at the lower end of said yoke and having a central passage, the resilientclamping jaws pivoted to said yoke and meeting at their lower ends immediately beneath said head, the chute rigid with said head and leading into said passage, and screw delivery devices having depending therefrom a chute which telescopes within the first mentioned chute, whereby a continuous passage for the screws is afforded during the vertical movements of the driving rod and the parts'carried thereby, and also all axial movement of the yoke prevented, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES L. BRIGGS. Witnesses:

FRA NK' M. COPELAND, WM. A. COPELAND.