US1413616A

US1413616A - Strap tightener

Info

Publication number: US1413616A
Application number: US416947A
Authority: US
Inventors: George L Rock
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-10-14
Filing date: 1920-10-14
Publication date: 1922-04-25
Anticipated expiration: 1939-04-25

Description

G. L. ROCK.

STRAP TIGHTENER.

APPLICATION FILED OCT. 14, I920.

I Patented ADI. 25,- 1922.

2 S HEETS-SHEET lf j I 7x I '/I l I I I I I5 I I! I9 I I I II 2:- 1

I l INVENTOR.

TTORIIIEY.

G. L. ROCK.

STRAP TIGHTENER. APPLICATION FILED OCT. 14; 1920.

Patented Apr. 25, 1922.

- 2 SHEETS-SHEET 2. 9%

' INVENTOR.

' ATTORNEY.

omrao sures PATENT oFFici-i.

GEORGE L. BOOK, OF WAUKESHA, V7ISClOlQ'SIIltT.

STRAP TIGHTENEB.

Specificationof Letters Patent. t t 2 1922,

Application filed october 14, 1920. Serial No. 416,947.

To all whom it may concern 7 Be it known that I, GEORGE L. Boox, a citizen of the United States, and residlng at Waukesha, in the county of Waukesha and 6 State of Wisconsin, have invented a new and Improved Strap Tightener, of which the following is a specification.

' This invention consists in means for causing a tightening movement of two; ends or laps of a strap, tie or ball of thin metal ribbon in order to tightly bind the bale, box or bundle around which the bail has been placed previously to the locking of these ends together, and its object isto provide a tightening device which will cause such rela tive movement between the two ends of a bale strap to any desired'extent and without the possibility of either of the ends slipping away from the other so as to again loosen the tie or strap.

This invention consists in combination -with a body and an operating handle thereon. of a shoe or plate adapted to engage. the lower side of the inner or lower lap of the strap, a pair of operating dogs for engaging the opposite side of the outer lap of the strap. and means connecting the handle to these dogs.

It further consists in so constructing the dogs and the operating means therefor that the dogs will be in constant engagement with the outer lap of the strap at all times, one

of the dogs being'adapted to move the outer lap forward and then return for a fresh bite,

while the other dog revents said lap from moving backward with the first dog.

- It more specifically consists in adapting both dogs to move the outer lap forward alternately so that while one dog is returning for a fresh bite on the lap the other is moving the lap forward.

It also consists'in mounting the operating handle on an eccentric pin provided with a crank-arm so that when the pin is turned by means of the crank arm the dogs may be moved toward or from the work.

It also consists in providing resilient means to cause the dogs to constantly engage the outer lap of the strap whether moving forward or backward.

It also consists in the details of construe tion illustrated in the accompanying drawings and particularly pointed out in the claims.

In the drawings, Fig. 1 is a side. elevation of my improved strap tightener. Fig. 2

is an elevation of the opposite side of the head of this device. Fig. 3 is a plan of this device with the operatin handle' broken away on the line 3-3 o r Fig. 1. Fig. 4 is a view of this device with the'side broken away. Fig. 5 is a section on the line 55 of Fig 1. Fig. 6 is an end view of the eccentr c pin on which the lever is mounted. Fig. is a perspective on a larger scale of a key for locking this pin in position. Fig. 8 is a plan of a strap fastener. Figs. 9 and 10 are perspectives of a strap fastener before and after being bent to locking position. F g.11 is a section on the line 11-11 of Fig. 10. Fig. 12 is a perspective of a gauge adapted to be attached to the side of this strap tightener, in order to position it relative to straps of different widths.

Similar reference characters refer to like parts throughout the several views.

The drawings show the body of this strap tightener comprising a head 1 and a handle 2. Extending through the head is a pin 3. shown in elevation in Fig. 5, and consisting of a large end 4, an eccentric portion 5 and a small end 6 coaxial with. the large end 4. The head 1 of this tool is chambered and has sides7 and Sin which the ends 4 and 6 of this pin are rotatable. Mounted on the eccentric portion 5 of this pin is an operating lever 9 and formed on it adjacent the supporting pin are two

eccentrics

11 and 12, one above and the other below the pin 3. Between the two sides 7 and 8 of the head and mounted on the

eccentrics

11 and 12 are two

dogs

13 and 14, of which each has a tail 15 extending rearwardly which is held up by means of one arm 16 of a spring mounted on a cross pin 17 in thehandle 2. These two parts 16 of the spring wind around this pin 17 and the middle portion 18 extends forward as indicated in Fig. 3..

Immediately above the tails 15 of the dogs is a pin 19 which may be depressed to lift the serrated ends of the dogs upward.

Attached to the lower edge of the side 8 is a plate 21 having a' horizontal portion 22 provided with rearwardly extending ratchet teeth, as indicated in Fig. 4, and inserted in each of the

dogs

13 and 14 are the jaw members 23 which have forwardly extendin ratchet teeth. The operation of this device is as follows.

Thin ribbons or straps of metal 25 (Figs. 8, 9, 10 and 11) are passed around the bale, box or other container which is to be secured ointing toward the freeend of the upper up 26. These jaws 23 are normally held Y toward the plate 22 and to provide space to ;weakens the cross strips 33 betwelen the insert these two thicknesses of the strap 25 the button 19 is depressed to swing up these jaws on the dogs sufficiently to permit the double thickness of the tie to be inserted between the plate 22 and the dogs. The button 1 5 is then released and the spring arms 16 depress these j aw members 23 against the upper lap of the strap. The operatin handle 9 1s then moved back andforth. I ith the forward movement of this handle the dog 14 is pushed forward and the teeth of its jaw 23 bite into the upper lap 26 of the strap, Fig. -9, forcing it to the left on the lower lap 27 which is held from moving with the uper lap by means of the teeth in the lower p ate 22. During the forward movement of thehandle the other dog 13 is moved backwardly through the action of the other eccentric 11 and the teeth of its jaw 23 are sliding back on this upper lap'26 of the strap. When the handle 9 is moved back, the teeth of the jaw 23 of the dog 14 slide back on the lap 26 of the strap, while the teeth on the other dog move this lap forward. All of this time the lower lap is prevented from moving at all by means of the plate 22 and the pressure of the upper dogs thereon.

It will be observed that the movement of i this upper lap on the lower lap continues at will and care must be taken to prevent the tool from tearing the strap as there is no limit to the movement which this tool can give to the upper lap ofthe strap. After the stra has been tightened sufficiently and before t e tool is released, the tie fastener 29 is flattened down as shown in Fig. 10and in cross section in Fig. 11, after which a;

.. center punch may be used to drive down the metal at the point 30 to lock the strap and.

the fastener together. In Fig. 8 I have shown this strap fastener 29 with its slots 28 and also with the central slot 32 which center slot 32 and the end slots when the center punch is driven down, and with it the metal of the two thicknesses of ties, and these are forced down into the slot 32. These metal arms will be bent outwardly and firmly grip the metal of the strap and also distort the strap fastener sufiiciently to prevent itbeing used again.

The teeth of the dogs 23 {engage the two laps of the strap 25 so'that it is sometimes difiicult .to lift the dogs 23 from the plate 22' sufficiently to release the two'thicknewes of the strap by means of thebutton 19. It is 22 is thjen slipped below the.

for this reason that Iform the pin 3 with an eccentric 5 and with an arm; 35 which is normally held in the ition shown in Fig. 2 byithe' pri 36. en the teeth of the aws 23 are d' ult to disengage, the arm 35 1s swung up which lifts the operating handle 9 and with it the

dogs

13 and 14. The arm 35 normally rests against the pin 37 The pin 3 is held in position by the slidable key 38 which lies in a groove in the plate 21 between the shoulders 39 and 40 thereon. This key has a flat head 42 which is adapted to enter the groove 44 in this pin. The .plate 21 abuts against a shoulder 43 on the head 1 and is held in position by the two lugs 45 thereon.

The width of the straps usually employed vary from three eighths to three quarters of an inch, and in order to fit the present device to operate on these several widths, I provide a ide such as shown in Fig. 12, of which t e body 46 fits between the lugs 45 on the head and the fingers 47 extend at each end of the foot 22. When positioned as indicated in Fig. 5, the inner ends of the fingers are adjacent the dog 14. The guide is held in posltion by the screw 48, beneath whose head is a washer 49 one sixteenth inch thick, which may be placed between the body 46 of the guide and the side plate 21 of the tool to position the ends of these fingers 47 that distance from the dog 14, and fit the tool for straps one eighth inch wider than before. For wider straps the guide is omitted.

In order to limit the movement of the handle 9 within the practical working range of the

eccentrics

11 and 12, I provide the body with the

shoulders

51 and 52, a ainst which the handle will strike before t e eccentrics pass the line of work. The several details of construction may all be changed by those skilled in the art without departing from the spirit of my invention as set forth in the following claims.

of a body and a shoe thereon adapted to extend under the lower lap of the strap and having ratchet teeth-to. prevent rearward movement of saidlower' lap, a pair of jaws adapted to engage the upper lap of the strap and having ratchet teethextending in the opposite directionfrom those on the plate, and means to move said jaws forward alternately to slidethe upper lap of the strap on the lower- 1 '3. In a strap ti hten'er,the combination of means to prevent ackward movement of the .said means embodying a dog havlng a toothed jaw to operatively en age the upper lap while moving forward an to slide thereon while movingbackward, and means to prevent the upper lap frommoving rear- .ward with said dog.

4. In a strap tightener, the combination of means to prevent backward movement of the lower lap of a strap, and means for moving the upper lap of the strap forward step-by step, said means consisting of a pair of dogs each having toothed jaws to operatively engage the upper lap while moving forward and to slide back on said lap'while the other dog is moving forward.

5. In a strap tightener, the combination of means to prevent backward movement ofthe lower lap of a strap, means for moving the upper lap of the strap forward step by step, said means consisting of a pair of dogs each having toothed jaws to operatively engage the upper lap while moving forward and to slide back-on said lap while the other dog is moving forward, and a dogs, one of the dogs engaging above the pivot of said handle and the other below said pivot.

6. In a strap tightener, the combination of a body and an operating handle pivotally mounted therein and having an eccentric on each side, one above and the otherbelow the pivot of the handle, a shoe on the body adapted to extend below the lower lap of the strap to be tightened, a dog mounted intermediate its ends oneach eccentric, and resilient means to press the forward ends of the dogs toward said plate so as to engage the upper lap of the strap as the operating handle is moved back and forth.

7. In a strap tightener, the combination of a body and an operating handle pivotally mounted therein and having an eccentric on each side, one above and the other below the pivot of the handle, a shoe on the body adapted to extend below the lower lap of the strap to be tightened, a dog mounted intermediate its ends on each eccentric, resilient means to press the forward ends of the dogs toward said plate so as to engage the upper lap of the strap as the operating handle is moved back and forth, and jaws mounted in the forward ends of said dogs and having forwardly extending ratchet teeth.

pivotally mounted operating handle engaging said means to press the forward ends of the dogs toward said plate so as to engage the upper lap of the strap asthe operating handle is moved back and "forth, jaws mounted in the forward ends of said dogs and having for wardly extending ratchet teeth, the pivot for said operating handle being eccentrically mounted in said head, and means to turn the pivot to'move the jaws on the dogs away from said plate.

9. In a strap tightener, the combination of a body and an operating handle pivotally mounted therein and having an eccentric on each side, one above and the other below the pivot of the handle, a shoe on the body adapted toextend below the lower lap of the strap to be tightened, a dog mounted intermediate its ends on each eccentric, resilient means to press the forward ends of the dogs toward said plate so as to engage the upper lap of the strap as the operating handle is moved back and forth, and means to engage the rear ends of said dogs to swing the dogs on said eccentrics to lift the front ends of the dogs from said plate to permit insertion of the laps of the strap.

10. In a strap tightener, the combination of a body and an operating handle pivotally mounted therein and having an eccentric on each side, oneabove and the other below the pivot of the handle, a shoe 6n the body adapted to extend below the lower lap of the strap to be tightened and having rearwardly directed ratchet teeth, .a dog mounted intermediate its ends on each eccentric, and resilient means to press the forward ends of the dogs toward said plate so as to engage the upper lap of the strap as the operating handle is moved back and forth comprising a spring mounted in the body and engaging the rear ends of said dogs, and means mounted on the body to engage the edge of the strap to position said dogs relative thereto.

11. 'In a strap tightener, the combination of a body and a shoe thereon adapted to extend under the lower lap of the strap, and

a plurality of jaws adapted to engage the upper lap of the strap, and means to move said jaws forward and backward to cause tighteningmovement of the strap.

12. In a strap tightener, the combination of a head, a plate thereon to support overlapping portions of a strap, a handle movably mounted on the head, and a pair of engaging members operatively connected to the handle and adapted to engage one of the laps of the strap adjacent said plate, one of said members moving the engaged lap for ward on the other lap while the other engaging member slides backward on the moving la 13. In a strap tightener, the combination ofa head, a plate thereon to support overlapping portions of a strap, a handle movably mounted on the head, and a pair of engaging members operatively connected to the handle and adapted to engage one of the laps of the strap adjacent said plate, one of said members moving one lap forward on the other while the handle moves in one direction and sliding backward on said lap when the handle moves in the opposite direction, the second member preventing backward movement of said lap when the first member moves backwardly.

14. In a strap tightener, the combination of a body and .a shoe thereon adapted to extend under the lower lap of the strap, a plurality of jaws adapted to engage the upper lap of the strap, and means to move sald jaws forward alternately, saidplate havlng ratchet teeth to prevent movement of the lower lap with the upper lap.

15. In a strap tightener, the combination of a body and a shoe thereon adapted to extend under the lower lap of the strap, a plurality of jaws adapted to engage the upper lap of the strap, means to move said jaws forward alternately, and ad ustable means to position the strap relative to the jaws.

16. In a strap tightener, the combination of .a body and an operating handle pivotally mounted therein and having an eccentric on each side, one above and the other below the pivot of the handle, a dog mounted intermediate its ends on each eccentric and adapted to engage the strap to be tightened, and means to limit the swinging movement of the operating handle within the practical work ing range of the eccentrics.

17. In a strap tlghtener, the combination of a body and an operating handle pivotally mounted therein and having an eccentric on each side, the center of one eccentric being on one side and the center of the other eccentric being on the opposite side of the pivotal line of the handle, .a shoe carried by the body and adapted to extend under the lower lap of the strap to be tightened, anda jaw operatively connected to each eccentric and adapted to be moved forward and backward thereby in engagement with the upper lap of the strap.

18. In a strap tightener, the combination of a body and an operating handle pivotally mounted therein and having an eccentric on each side, the center of one eccentric be-.

ing on one side and the center of the other eccentric being on the opposite side of the pivotal line of the handle, a shoe carried by the body and adapted to extend under the lower lap of the strap to be tightened, and a jaw operatively connected to each eccentric and adapted to be moved forward and backward thereby in enga ement with the upper lap of the strap, sai dogs having ratchet teeth to engage the strap, and springs to hold these teeth against the strap.

19. In a strap tightener, the combination of a body and an operating handle pivotally mounted therein and having an eccentric on each side, the center of one eccentric being on one side and the center of the other eccentric being on the opposite side of the pivotal