US994008A - Nail leather-heading machine. - Google Patents

Description

P. & G. B. KNAPP.

NAIL LEATHER HEADING MACHINE.

APPLIQATION FILED 3122113.11909.

Patented May 30, 1911.

3 SHEETS-SHEET 1.

mW w vG Inhwmlll 7 @A 49% FM w mlm W M5 W -1 2. b W w A 0 all,

F. & G. B. KNAPP.

NAIL LEATHER HEADING MACHINE.

APPLIoATIoN FILED sPT.1s,1909.

994,008, 1 Patented May 30, 19711.

3 SHEETS-SHEET 2.

j' EN 5M @94V MW/mamma F. & G. B. KNAPP.

NAIL LEATHER HEADING MACHINE.

APPLIOATION FILED sEPT.13,19o9.

994,908, Patented May 3o, 1911.

3 SHEETS-SHEET 3.

THE Nomzls Fermes co., wAsHlNafo/v, n c.

FRANK KNAPP AND GEORGE '.B. KNAPP, 0F KANSAS CITY, MISSOURI.

NAIL LEATHER-HEADING MACHINE.

conoce.

Specification of Letters Iatent.

Patented May 30, 1911.

Application filed September 13, 1909. Serial No. 517,446.

To all whom it 'may concern:

Be it known that we, FRANK KNAPP and GEORGE B. KNAPP, citizens of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful lmprovements in Nail Leather-Heading Machines, of which the following is a specification.

This invention relates to nail leather-heading machines, and has for its object to produce a machine of this character which performs its function efficiently, reliably and expeditiously.

Vith this general object in view and others as hereinafter appear, the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawings, in which- Figure 1, is a front view of a nail leatherheading machine embodying our invention. Fig. 2, is a top plan view of the same. Fig. 3, is a right-hand side view of the machine. Fig. 4, is an enlarged section taken on the line IV-IV of Fig. 3. Fig. 5, is a vertical section on the line V-V of Fig. 2. Fig. 6, is a section on the line VI-VI of Fig. 3. Fig. 7, is a section on the line VII-VH of Fig. 4 with the feed wheel omitted. Fig. 8, is a diagrammatic view showing the electrical connections between the make-and-break device and the electromagnet, forming parts of the machine.

Before proceeding with. the detailed description of the machine, it is desirable to state that nails equipped with leather or equivalent heads or washers are used in electrical work and that heretofore it has been customary for the workmen engaged in Stringing electric wires in buildings to slip perforated leather disks upon the nails by hand, a rather slow and tedious operation.

Referring now to the det-ail construction, 1 indicates a pedestal having a top 2 provided with an extension 3 projecting to the right and an extension 4 projecting and sloping upward to the left, a nail-receptacle 5 being preferably supported upon eXtension 3, and a leather head receptacle 6 upon extension 4, and having the discharge end of its bottom of concave arcuate form. The top is provided with an arcuate slot 6 struck from the same center by preference as the concave edge of receptacle 6 and said slot rearward of such center' terminates in a contracted or narrow portion 6b of slightly larger width, by preference, than the diameter of a ten-penny nail. At its rear edge the top is provided with an upwardly projecting standard 7 as al support for mechanism. hereinafter described.

8 is a stud bolt secured in and projecting upward from top 2 axially of the concave edge of the bottom of receptacle 6 and the slot 6a, and resting flatly upon the top 2 is a feed wheel 9 in the form of a ratchet wheel, of the same thickness by preference, as the bottom of receptacle 6 and of such size that its teeth almost scrape the concave edge of the bottom of said receptacle in their rotative movement.

The ratchet wheel as shown is equipped with eighteen teeth and near its periphery with a corresponding number of holes 10, of size to receive the leather heads hereinafter identified and of slightly smaller diameter than slot 6a over which they successively pass in the rotation of the wheel, and to impart rotative step bystep movement to said feed wheel, the following mechanism is provided:

11 is a rock lever pivoted on stud bolt 8 and consisting of a rearwardly projecting arm 12 and a forwardly projecting arm 13, the latter' pivotally carrying a pawl 14 and a spring 15 to hold the pawl pressed yieldingly against the ratchet-toothed edge of the feed wheel.

16 is a bracket swiveled to the rear end of arm 12, and pivotally connected by a link 17 to a rock-bar 18 pivoted on bolt 19 carried by standard 7, the upper end of said rock bar 18 carrying a pin 2O engaging the slot of a vertically reciprocating bar 21, said slot consisting of a pair of vertical end portions 22 and 23 out of alinement with each other and connected together by a compound curved or cam portion 24. The reciprocatory bar 21 is provided with a longitudinal slot 25 slidably mounted on and guided by pivot 19 and is also provided with an arm 26 pivotally connected to a bolt 27 which is in turn pivoted by a link 28 to the free end of the crank arm 29 of a shaft 30, journaled in the upper end of standard 7, motion being imparted continuously in one direction to said'shaft by a driven wheel 31 mounted thereon, said wheel being of any suitable or preferred type, but shown as a sprocket wheel. The shaft is also provided with the rotary member of a circuit makingand-breaking device, said member consisting'of a shaft having a periphery consisting of insulating material 32 and conducting material 33. The companion member of the circuit making-and-breaking device consists of a contact pin 34 fitting in the socketed bracket 35 secured to standard 7 by preference, and insulated from the same at 36, or otherwise, a spring 37 fitting in the socket of said bracket and holding the contact pin pressed yieldingly against the periphery of the rotary member, so that the circuit shall be made and broken once in each revolution of the same.

38 is a vertical reciprocatory driver' or plunger mounted slidably in the keeper or guide 39 secured to standard 7 said plunger being vertically alined with each hole 10 of the feed wheel, as such holes successively assume positions directly rearward of the axis of the wheel as hereinafter explained. The upper end of the driver or plunger is pivoted to bolt 27, so that once in each revolution of t-he shaft 30, the driver or plunger and bar 21 shall move downward and upward.

40 is a link pivotally connected at its lower end to bolt 27 and provided at its upper end with a bolt 4l engaging the longitudinal slot 42 in the head of a T-shaped lever 43, pivoted as at 44 to standard 7 and pivotally connected at the outer end of its stem by a link 45 to a rock arm 46, pivoted at 47 to standard 7. The free end of the rock arm 46 is pivotally connected by alink 48 to the upper end of a vertical slide bar 49 provided with a longitudinal slot 50 guided upon bolts 5l secured to a vertical rib 52 projecting forward from said standard. Projecting forward from the lower end and side margins of slide bar 49 is a pair of vertical arms 53 provided with obtuse-angle- shaped slots 54 and 55 inverted with respect to each other and so disposed that one of the arms of slot 54 extends vertically and the other downwardly and rearwardly, and one of the arms of slot 55 extends vertically and the other upwardly and rearwardly, the angles of the slots being transversely alined as will be apparent by reference to Fig. 3.

56 and 57 are vertical rock-bars pivoted to arms 57a of a keeper hereinafter described and rock bar 56 has a pin 58 slid-- ingly engaging slot 54 and rock bar 57 a pin 59 slidably engaging slot 55.

60 and 61 are slide bolts pivoted at their outer ends to rock bars 56 and 57 respectively and mounted slidably in the keeper 62 projecting forward from a U-shaped chute 63 suitably supported by the standard or otherwise, the front wall of the chute having openings 64 and 65 through which said bolts 60 and 61 may be projected to form temporary partitions for the chute. The chute is of sufficient depth to accommodate the nails employed, ten-penny nails being the size ordinarily used and sufiiciently narrow to permit the heads of the nails numbered 66 to rest upon the upper edges of the walls of the chute. The chute is inclined downward and to the left at the proper angle to permit the nails to gravitate downward until the foremost one is arrested by bolt 60 or 61 as the case may be, as hereinafter explained, and the outer end or mouth of the chute is preferably flared as at 67 to facilitate the insertion of the nails in the chute.

Pivoted to pin 68 projecting forward .from standard 7 is a nail supporter 69 having one end projecting under the driver or plunger when elevated and at such end disposed adjacent to the discharge end of the chute 63, said end of the nail supporter having a bifurcation 70 just wide enough to easily receive the shanks of the nails but not the heads so that said nails shall successively hang by their heads upon said supporter vertically below the driver or plunger. The opposite end of the nail supporter is of suflicient weight to yieldingly hold the supporter in the position described, a stop pin 71 projecting from the standard 7 for the purpose of preventing the end of the supporter from attaining an inoperative position, that is attaining a position higher than the discharge end of the chute.

72 is a stop secured to the top 2 or at any other suitable point and adapted to prevent the point of the nail from being 'drawn out of alinement with the driver or plunger and the center of the underlying hole 10 of the feed wheel, by means of the core 74 of the electroma'gnct 73, said core in the preferred construction fitting slidingly within the coil or magnet and adapted to be magnetized periodically as hereinafter explained.

75 is a pivot connecting the said core to the lower end of. rock bar 18 so that the rocking movement of said rock bar shall impart longitudinal movement in one direction or the other to the core, and secured to the opposite sides of the core and projecting beyond the adjacent end of the same are non-magnetic plates 76 to guard against back and fort-h swinging movement of the nails as they are successively caught by the supporter.

77 is a wire electrically connected at its opposite ends to the coil or magnet 73, and the contact pin 34. 78 is a wire connecting the opposite end of said coil with battery 79 or an equivalent source of electric-current supply, the opposite pole of said battery being connected by a wire 80 to the rotary member of the make-and-break device.

The receptacle 5 is adapted to be charged with nailsnone being shown in the box,

or the nails may be transferred from the usual receptacle or keg to the chute. The perforated disks 81 are adapted to be stored in receptacle 6 and deposited by hand or otherwise in the holes 10 of the feed wheel, or any suitable means not shown, may be employed for Aautomatically disposing the nails in the chute, and the perforated disks in the holes in the feed wheel, said meansforming no part of the present invention.

Assuming that the parts are in the position shown, and that the shaft 30 is being driven in the direction indicated by the arrow Fig. 1, it will be seen, that through the instrumentality of the crank arm 29 and link 28, the driver or plunger 38 and bar 21 will be moved downward and that the former will engage the head of the nail suspended from the pivoted supporter 69, and start said nail downward, it being noticed that at this instant the core 74 is advanced and magnetized because of the completion of the circuit through the engagement of the conducting material and contact pin 34, it being also noticed that the feed wheel is stationary because of the inaction of rock bar 18. Shortly after the driver or plunger has moved downward sufliciently to project the point of the nail through the alined hole of the leather disk underlying the driver or plunger, the core becomes demagnetized through the rotary movement of the member 32 of the circuit making-and-breaking device and at about the same instant the cani portion 24 of the slot of the downwardly moving bar 21, engages pin 20 and rocks the lower end of the rock bar outward, this movement incidentally returning the rock bar 11 from the position shown in Fig. 2 to its initial position to permit the pawl 14 to be forced by sprino1 15 into engagement with the next tooth oL-f the feed wheel. In

, the withdrawal of the core it is incapabledue to the presence of residual magnetismof disarranging the nail because the lower end of the latter is held by stop 72, and its upper end is against the ba'se of the bifurcation of the supporter, which suporter as will be readily understood is pushed aside under the pressure of the driver or plunger on the nail head until the latter eventually slides 0H the upper side of the supporter, the opposite end of the supporter swinging afterward between the rock bar 18 and bar 21. The movement of the driver or plunger continues until the head of the nail nearly comes in contact with the top of the disk or leather head, the feed wheel remaining stationary during the engagement of pin 20 with the portion 22 of the slot of bar 21. Just before the downward movement of the driver or plunger is completed pin 41 carried by link 40, attains the lower end of slot 42 and rocks the T-shaped rock lever 43 and hence through link 45 rock arm 46 and link 48, slides bar 49 upward. In this movement the rearwardly and upwardly projecting portion of slot 55 through engagement with pin 59, slides bolt 61 rearward until it forms a temporary partition for the chute and it remains in such projected position until the lower end of the vertical portion of the slot 55 comes into engagement with said pin.

Inthe first half of the upward movement of the slide bar 49, the rock lever 56 remains stationary because of the engagement of its pin 58 with the vertical portion of slot 54. In the last half of such upward movement the downwardly and rearwardly inclined portion of said slot 54 engages said pin 58 and rocks the lever 56 and effects the withdrawal of bolt 60 from the chute and thus permits the nails to gravitate downward in the chute until the foremost is arrested by the projected bolt 61.

As the second half of the revolution of the crank shaft occurs, the driver or plunger and bar 21 are relevated. During the reelevation of bar 21, the cam portion 24 of its slot rocks the rock bar 18 back to its original position and thus redisposes core 74 in the position shown in Fig. 1, and at the same time operates rock lever 11 and causes the same through the instrumentality of pawl 14 to rotate the feed wheel one step in the direction indicated by the arrow, Fig. 2, this movement moving the nail equipped with the leather head from the contracted end 6b of the slot 61L in top 2, to a position over the body portion of said slot in order that such nail may drop through said slot into a suitable receptacle, not shown, the leather disk occupying the next opening 10, being at the same time disposed vertically below the driver or plunger and over the contracted end of the slot, ready to receive the neXt nail.

In the latter part of the second half of the revolution of crank shaft 30, the pin 41 attains the upper end of slot 42 of the T- shaped lever and rocks the same and through the instrumentality of link 45, rock arm 46 and link 48, moves the slide bar 49 downward and the slide bolts 60 and 61 are reversely operated, that is bolt 60 is repro] ected into the chute between the two foremost nails and then bolt 61 is withdrawn from the path of the foremost nail to permit the latter to slide downward and o the inclined end of the chute and onto the nail supporter. Just before this occurs the advanced core 74 is renergized by the rengagement of conductor 83 and contact pin 34, and as a result said core attracts and pulls the nail squarely against its advanced end and between the nonmagnetic plates and incidentally against the base of the bifurcation of the nail supporter and the alined or free end of stop 72, so that such nail shall be held in a vertical position and in perfect alinement with the driver or plunger and the perforation ofthe underlying disk.

A complete cycle of the operations has been described, all future operations being repetitions as will be readily understood. The -machine operates with great rapidity and should any of the headed nails through the-adhesion of the leather heads to the Walls of the holes in the feed Wheel fail to drop through slot 6a into the receptacle below, they Will be dislodged by a spring knocler 82 secured at one end to the standard 7, the free end of the knocker resting frictionally on the feed Wheel and swinging successively down into the openings l() thereof and dislodging as above stated, any nail, Which fails to drop into the receptacle as explained.

From the above description it Will be apparent that We have produced a nail leatherheading machine embodying the features of advantage enumerated as desirable which obviously is susceptible of modification in minor particulars Without departing from the spirit and scope of the appended claims.

Having thus described the invention what We claim as new and desire to secure by Letters Patent, is

1. A nail feeding machine, comprising a movable nail supporter, a magnet to hold the nail in a vertical position, means for moving` the nail endvvise and the nail supporter out of the Way of the nail, means to demagnetize the magnet, and means for withdrawing the magnet from operative position With relation to the nail during the movement of the latter.

2. A nail feeding machine, comprising a pivoted supporter for a nail, a movable magnet to hold the nail in vertical position,

means to impart endWise movement to the nail and cause the same to force the said supporter out of its path, means for demagnetizing the magnet, means for Withdrawing the magnet from operative relation to the nail shortly after the movement of the same begins, and means for returning the nail-moving means to its original position.V 3. A nail feeding machine, comprising a pivoted supporter for a nail, a movable magnet to hold the nail in vertical position, means to impart endWise movement to the nail and cause the same to force the said supporter out of its path, means for de* magnetizing the magnet, means for Withdrawing the magnet from operative relation to the nail shortly after the movement of the same begins, means for returning the nailmoving means to its original position, and means to return the magnet to its original position.

l. A nail feeding machine, comprising a movable nail supporter, a magnet to hold the nail in a vertical position, means for moving the nail endwise and the nail supporter out of the Way of the nail, means to demagnetize the magnet, a movable stop engaging the nail at the opposite side thereof from the magnet and nearer its point than said magnet, and means for Withdrawing the magnet from operative relation to the nail during the said movement of the same.

In testimony whereof We aifiX our signatures, in the presence of tWo Witnesses.

FRANK KNAPP. GEORGE B. KNAPP.

Copies of this patent may be obtained fol` ve cents each, by addressing the Commissioner of Patents,

Washington, D. C.

Images