US806823A

US806823A - Broom-sewing machine.

Info

Publication number: US806823A
Application number: US7947201A
Authority: US
Inventors: Andrew E Miller
Original assignee: HAMILTON CASSARD
Current assignee: HAMILTON CASSARD
Priority date: 1901-10-21
Filing date: 1901-10-21
Publication date: 1905-12-12
Anticipated expiration: 1922-12-12

Description

PATENTBD DEG. 12, 1905. A. E. MILLER.

BROOM SEWING MACHINE.

APPLIOATION FILED 00T. 21,1901.

. I we Eg MW Y No. 806,823. PATENTED DEG. 12, 1905. A. E. MILLER. BROOM SEWING MACHINE.

APPLICATION FILED OCT. 21,1901.

235 SHEETS-#SHEET 2.

No. 806,823. PATENTED DEG. 12, 1905.

A. E. MILLER.

BEooM SEWING MACHINE.

APPLICATION FILED 00T. Y21, 1901.

5 SHBBTS-SHBET 3.

Witnesses l ML l! m No. 806,823. PATENTED DEC. l2, 1905. A. E. MILLER.

BRUOM SEWING MACHINE.

APPLIUATION FILED 00T. 21,1901.

5 SHEETS-SHEBT 4.

Il 'l' Inventor Ch @wmmm l l te; 'si

No. 806,823. PATENTED DBO. 12, 1905.

l A. E. MILLER. BROOM SEWING-MACHINE.

APPLICATION FILED 00T. 2l. 1901.

$ 5 SHEETS-SHEET 5.

Witnesses M5 UNITED STATES PATENT OFFICE.

ANDREW E. MILLER, OF BALTIMORE, MARYLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO HAMILTON CASSARD, OF BALTIMORE, MARYLAND. j

BROOIVI-SEWING MACHINE.

y Specication of Letters Patent.

Patenten` Dec.' 12, 1905.

Application filed 0ctober`2l, 1901. Serial No. 79,472.

T0 a/Z/ whom, it may concern.-

Be it known that I, ANDREW E. MILLER, a subject of the King of Great Britain, residing at Baltimore, State of Maryland, have invented certain new and useful Improvements in' Broom-Sewing Machines, of which the following is a specification.

This invention relates to broom-sewing machinery, the particular machine illustrated being especially adapted to sew whisk-brooms. Most of the elements of the machine, however, are capable of use in machines for sewing the large sizes of brooms which are prof vided with long handles. Y

The object of the invention is to provide simple machine which will do good work rapidly and which can be built at a reasonable cost and operated by unskilled labor.

The invention will be described with reference to the accompanying drawings,in which- Figure 1 is a front elevation of the entire machine, the vise being closed. Fig. 2 is a perspective View of the vise only, showing it open. Fig. 3 is a plan View of the entire machine. Fig. 4 is a section about on the line 4 4 of Fig. 3, illustrating the feeding-cams. Fig. 5 is a partial left side elevation with parts broken away. Fig. 6 is a detail. Fig. 7 is a partial right side elevation showing the parts in the position occupied when the machine is running. Fig. 8 is a similar view showing the parts in position occupied when the machine is stopped. Fig. 9 is a detail view showing the guideway in the link and the guide-block and crank-pin for operating the needle-arms.

Referring to the drawings, 11 indicates the frame, which may be of any design suitable for sustaining the mechanism. As shown, the frame is in the form of a hollow rectangular body having two posts 12 on its forward corners and two posts 13 on its rear corners.

The @isa-The vise comprises a fixed jaw 14 and a movable jaw 15, supported on a rocking vise-frame 16, which rocks backward and forward on trunnions 17. The fixed jaw, as shown, is integral with the vise-frame, and the movable jaw is pivoted thereto at 18. The movable jaw is connected by links 19 with arms 20 upon a rock-shaft 21, carried on the back of the fixed jaw. Another arm 22 on rock-shaft 21 is connected by link 23 with the short arm 24 of a vise-operating lever 25, journaled upon a pivot-bolt 25'?, said lever being preferably provided with a handle 26. As shown in Fig. 2, the handle is thrown over to the left and the jaw is wide open. When the broom is placed in position, `the handle 26 is moved to the right into the position shown in Fig. 1, which has the effect of closing the vise-jaws firmly upon the broom. In this position the parts are held `securely by a spring-latch 27, which isattached t0 an adjustable arm 27u. Said arm, as shown in Figs. 1, 2, and 5, is journaled at its upper end upon the rock-shaft 21 and has at its lower end an elongated eye or link 27D, through whichy the pivot-bolt 25a extends. The central part of the bolt is angular in cross-section .for convenience in turning with a wrench,.and its inner reduced end is threaded and extends into a threaded openingin the vise. The arm 27 may be held in any desired adjustment by turning the pivot-bolt so as 'to clamp the link 27bvbetween thek angular portion ofl the bolt and the vise. By moving the arm in one direction the latch 27 is raised, and bymoving said arm in the opposite direction lthe latch is lowered. The position of the latch which engages the arm 22 obviously determines the distance between the vise-jaws when the latter are closed upon a broom. lThe latch may be thrown off by pressing upon the connected arm 28, which is situated conveniently to the handle 26 when the vise is closed.

When the broom has been arranged and clamped in the'vise ready for sewing, `the vise is moved back to its rearmost position, which is the position at `which the rst stitch is formed. To regulate the point at which the iirst stitch is formed, an adjustable stop for the vise is provided. As shown, a projection 29, integral with the vise-frame, engages the end of a rod 30, which slides in

bearings

31 and 32 on the frame. The rod 30 is normally pressed toward the vise by a spring 33.` On its rear yend it is provided with an adjustable threaded nut 34, which may be set at any desired distance from the stop 35 on the end of the box 32. The nut IOO 34 is properly adjusted, and when the vise is thrown back it continues to move backward until the nut 34 engaes the stop 35.

Starz/ing cmd stoppz'ng devices-The mathe upper end of which is connected to an section.

arm 38 of a three-arm lever which is pivoted at 39. Arm 38 is connected by an adjustable link 40 to a clutch-lever 41, pivoted at 42. Power is communicated to a belt-pulley 43, and the clutch, which may be of anysuitable construction, connects and disconnects said pulley with a disk 44, the pulley and disk being mounted on the shaft 45. When the clutch is thrown out, the connected parts are in the position shown in Fig. 8 and are held in this position by a spring 46. Gravitylatch 47 vstands over the ends 48 of arm 49 of the three-arm treadle-lever. This latch prevents the lever from being turned and the clutch from being thrown in when the vise is in its forward position. Before the sewing mechanism can be started the vise must be moved rearward. into the sewing position, which movement causes the rod 3() to move the latch 47 -out of the path of the lever 48. Such movement unlocks the treadle-lever and permits the clutch to be operated by the treadle. When the treadle is pushed down, the parts assume the position shown in Fig. 7 and are held in this position by a latchlever 50, which engages the upper end of arm 51 of the treadle-lever, the latch being drawn into this position by spring 57. The latch-lever 50 is released automatically after each row of stitches is sewed in a manner to be presently described. When said latchlever releases the treadle-lever, the spring 46 rocks the latter and throws out the clutch.

At the same time a brake-Shoe 52 is 'auto-- matically applied to a disk 53 on the camshaft 54. This is accomplished by connecting the brake-shoe with the arm 51 of the treadle-lever bya link 55, which link forms a toggle connection with said arm 51, adapted to apply the brake with great power. The brakeshoe is secured near one end to a rock-shaft 56, which is mounted in a fixed bearing 57.

Wee-feeding meedraaien-To produce a series of stitches, the vise must be fed 'step by step in synchronism with the movement of the sewing-needles. A simple and effective feeding device is illustrated in the drawings, particularly in Figs. 4 and 5. The vise has a tendency to move forward, such tendency in the present instance being imparted to it by a weight 58 on the forward side of the vise-frame. To the vise is pivotally connected a sliding rod 59, which is preferably fiat and rectangular in cross-section. Beneath this rod is another sliding rod 60, of similar cross- The upper rod is subjected to the action of a clamp 61, controlled by a cam-lever 62, having a cam-roll 63, running on cam 64. The lower rod is controlled by a similar clamp 65, operated by cam-lever 66, roll 67, and cam 68. Both cam-levers are normally drawn toward their cams by springs' 6 9 and 70, respectively. The cams are diametrically opposite and arranged on a cam-wheel 71, which is mounted on the cam-shaft 54. An arm 56,

secured to the rock-shaft 56, engages the camlevers when the brake is applied to stop the machine and rocks said levers in a direction to release the clamps from the sliding feedrods, thus releasing the vise from the feed mechanism when the machine is brought to a stop. As the clamps are held out of engagement with the feed-rods by said arm, while the machine is stopped the vise may Ain starting be moved backward to the sewing mechanism without being impeded by the clamps.

The

rods

59 and 60 are connected by a stoplink 72, which is pivotally connected to both rods and limits the relative movement of the rods. The relative movement in one direction is limited by an arm 73 of the stop-link coming in contact with a stop 74 on the rod 59. The relative movement in the opposite direction is limited by an arm 75 of the stoplink coming in contact with a stop 76 upon the upper side of rod 59. Stop 76 is carried by a lever 77, pivoted to rod 59, and the location of the stop may be adjusted by a screw 7 8, which works in the lever and bears upon the rod. Lever 77 has an arm 79 extending downward into the plane of the rod 60. This arm is connected with the rod 60 by a spring 80, which spring holds the screw 78 against the rod 59 and at the same time constantly tends to draw the rod 60 forward or toward the vise-frame.

The

rods

59 and 60, their connecting element, the part 72 75, and the gripping devices 61 65 may be termed the feed membersthat is, the members which coperate with the stop to feed the vise and broom to the sewing mechanism. The feed member 72 75 has a rocking movement upon a pivot passing through the bar 59, which movement is varied by adjustment of the stop 76.

It is to be particularly noted that I do not limit my invention to the described construction and arrangement of the means for connecting the feed members to the vise or for coperating with the stop to control the length of the step-by-step movements of the vise, as these parts may obviously be constructed in many diiferent ways.

The operation of the feeding devices is as follows: The vise has a tendency to move forward by reason of the overbalancing weight 58. The

clamps

61 and 65 alternately release the

rods

59 and 60. When rod 59 is released, the vise and rod move forward until the arm 75 of the stop-link comes in contact with the stop 76. These parts are then held in this position until the rod 59 is clamped. While the rod 59 is clamped the rod 60 is momentarily released by the clamp 65, and while released it is drawn forward by the spring 8O until the stop-arm 73 comes in contact with the stop74. It will be seen that they length of stitch is determined by the amount of vibration or rocking movement of the stoplink 72 and that this movement may be increased or diminished by the adjusting-screw 78. By this simple mechanism the vise is fed to the sewing mechanism and the length of stitch is regulated. At the completion of thelast stitch the mechanism is automatically stopped. The stopping device comprises a rod 81, pivotally connected to an arm 82 at the rear of the vise. Rod81 extends through an opening 83 in the upper end of the lockinglever 50. Midway of the rod is a shoulder 84. When the vise is thrown back, the shoulder is moved considerably to the rear of the lever 50. As the vise moves forward the shoulder 84 engages the lever 50 as the last stitch is formed, and the further movement of the vise rocks the lever and throws the machine instantly out of operation in a manner heretofore explained.

To provide for stopping at different points for different widths of brooms, the connection of the rod 81 with the vise is adjustable in the slot 85. The rod 81 has a rearward extension 86, which permits the vise to move to its foremost position without disengaging the rod from the lever 50.

Sewing mectam'sm.-Tlie sewing-needles 87 are carried in heads 88, which slide on horizontal guidesA 89. The needles are reciprocated by rocking arms 90, which are connected to the heads by links 91. The arms 90 are mounted on the rear posts 13 of the main frame. and they are connected together by a link 92. Link 92 is constructed in two parts centrally connected by bolts 93. In the middle of the link is a vertical slot in which slides a box 94, which forms the bearing of a crankpin 95, carried by the'disk 44 on shaft 45, and a crank-disk 96 on shaft 54.

The needle-threading devices of the present application are substantially identical with those shown in my pending application, Serial N o. 32,574,1iled October 10, 1900,and a detailed description and illustration of them in this case may therefore be omitted. The principal features of the devices are illustrated as follows: There are two threading arms or levers 100 and 101, having their rear ends pivotally connected to cam-levers 102, which have rolls engaging a cam-groove 103 in the cam-wheel 71 on the shaft 54. In the forward ends of the arms 100 and 101 are eyes 104, through which the needles pass alternately. There are also thread-clamping fingers 105, which are spring-pressed and operated to clamp the thread at the proper time. The right-hand arm 101 carries the hook or support 106, in which the thread is placed by the operator before the iirst stitch is taken. The movements of the arm 101 are controlled by a cam-slot 107, while the movements of the arm 100 are controlled by a reversed cam-slot 108.

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

1. In a broom-sewing machine, the combination of a rocking vise-frame having avisejaw fixed thereon, a second jaw pivotally secured to the vise-frame, a rock-shaft pivotally mounted on the fixed jaw, connections between said rock-shaft and the movable jaw, a lever connected to the rock-shaft for closing the vise, a latch for locking the lever when the vise is closed, a pivotally-mounted arm to which said latch is connected, and means for securing said arm in various adjustments.

2. In a broom-sewing machine, the combination with the rocking vise-frame having fixed and movable jaws, of an arm pivotally mounted upon the xed jaw, a link connecting said arm with the movable jaw, an operating-lever arranged to rock said arm, and a latch adjustably secured to the fixed member of the vise-frame and 4adapted to lock said parts when the vise-jaws are closed upon a broom.

3. In a broom-sewing machine, the combination with a rocking vise-frame having fixed and movable jaws, the arms pivotally mounted upon the xed jaw, a link connecting one of said arms with the movable jaw, an operating-lever, aV link connecting said operatinglever with the other arm, and a latch adjustably secured to the fixed jaw and adapted to engage and lock the parts when the vise-jaws are closed upon a broom.

4. In a broom-sewing machine, the visefeeding mechanism comprising a pair of relatively movablel bars, means p for alternately holding and releasing said bars, a connection between one of the bars and the vise, and means connected with the said bars whereby the movement of each bar is limited by the other.

5. In a broom-sewing machine, the combination with sewing mechanism,of a vise, means connected to the vise and constantly tending to move a broom carried by the vise from operative position relative to the sewing mechanism, means for holding the vise stationary with the broom in position to be operated on by the sewing mechanism, and means for intermittently releasing said holding means and including a stop and devices for adjusting the same to permit variation in the length of stitch.

6. In a broom-sewing machine, the combination of a rocking vise-frame having a visejaw fixed thereon, a second jaw pivotally connected to the vise-frame, a rock-shaft pivotally mounted on the xed jaw, connections between said rock-shaft and the movable jaw, a lever connected to the rock-shaft for closing the vise, and a spring-latch for locking the 1ever when the vise is closed.

7. In a broom-sewing machine, the 'combination with the rocking vise-frame, of the visejaws connected thereto. the rock-shaft on one vise-jaw, the arms and links connecting said shaft with the other vise-jaw, the operatinglever for closing the vise, connections substan- IOO IIO

tially as described between said lever and the rock-shaft, and means for locking and unlocking the vise.

8. In a broom-sewing machine, the combination with the rocking vise-frame, of the visejaws connected thereto, the rock-shaft on one vise-jaw, connections between said shaft and the other vise-jaw, the operating-lever for closing the vise, connections between said lever and the rock-shaft, and a spring-latch connected to the rock-shaft and adapted to lock the lever when the vise is closed.

9. In a broom-sewing machine, the combination of a rocking vise-frame having a visejaw fixed thereon, a second jaw pivotal'ly connected to the vise-frame, a rock-shaft mounted on the fixed jaw and connected with the movable jaw, a lever connected to the rockshaft for moving the movable vise-jaw toward and from the fixed jaw, an arm mounted on said rock-shaft, and a spring-latch connected with said arm and adapted to engage the lever when the vise is closed.

l0. In a broom-sewing machine, the combination with the vise, of feeding mechanism comprising a pair of bars one of which is connected with the vise, clamps arranged to alternately hold and release said bars, a stoplink connecting said bars, a stop arranged to limit the movement of said link in one direction, and an adjustable stop arranged to limit the movement of the link in the other direction, whereby the length of stitch may be,

varied.

11. In a broom-sewing machine, the combination with the movable vise, of feeding mechanism comprising two sliding bars, clamps operating to hold and release said bars alternately, aconnection between one of said bars and the vise-frame, a spring connecting said bars, a stop-link pivotally connected to the bars, and stops for limiting the movement of said link whereby the relative movement of the bars is regulated.

12. In a broom-sewing' machine, the combination with the vise-frame, of feeding mechanism therefor comprising a pair of sliding rods, clamps for holding and releasing said rods alternately, cams and cam-levers for operating said clamps, a stop adjustably connected to one of said bars, a stop-link pivotally connected to both of said bars, and a spring connection between said bars, for-the purpose set forth.

13. In a broom-sewing machine, the combination with the vise-frame movable to and from the sewing mechanism, of a clutch for connecting the sewing mechanism with the power, a lever for operating the clutch and means for preventing the operation of the lever to start the machine while the vise-frame is apart from the sewing mechanism.

14. In a broom-sewing machine, the combination with the sewing mechanism, and the vise-frame movable to and from the sewing mechanism, of a treadle -for starting the machine, and means for preventing the operation of the treadle while the vise-frame is apart from the sewing mechanism.

l5. In a broom-sewing machine, the combination with the sewing mechanism and the vise movable to and from said mechanism, of a clutch for starting the machine, a lever connected with said clutch, a spring arranged to throw said lever to stop the machine, a lock or detent engaging said lever to prevent the stoppage of the machine, and a device connected with the vise for operating said detent to permit the machine to be stopped.

16. In a broom-sewing machine, the combination with the sewing mechanism, and the vise movable to and from said mechanism, of a clutch for starting and stopping the machine, a brake device, a lever having connections to said clutch and brake, a latch for holding said lever in the stopping position, a second latch or detent for holding said lever in the starting position and means whereby said latches are disengaged alternately by the vise in its movements to and from the sewing mechanism.

17. In a broom-sewing machine, the combination with the sewing mechanism and the vise, of the feeding mechanism connected with the vise comprising a pair of bars, one

of which is connected with the vise, and means for alternately holding and releasing said bars, cams and cam-leversfor operating the feeding mechanism, a brake and means for automatically applying the same to stop the machine, and means for automatically disengaging the bars from the holding mechanism to permit the vise to move away from the sewing mechanism on the completion of each row of stitches.

18. In a broom-sewing machine, the combination with the vise, the needle-heads and the guides for said heads, of the arms arranged to rock in a horizontal plane, the link pivotally connecting said arms, the vertical guide or slot in said link, the box movably mounted in said guide, and the shaft having a crankpin working in said box, for the purpose set forth.

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

ANDREW E. MILLER.

Witnesses:

THos. KELL BRADFORD, LEE PURGELL.

IOO