US514741A

US514741A - Cutter-guard

Info

Publication number: US514741A
Authority: US
Publication date: 1894-02-13
Anticipated expiration: 1911-02-13

Description

(No Model.) l

P. H. WARREN.

v 1 GUTTER GUARD. No. 514,741. v Patented Feb. 13, 1894.

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-V UNITED STATES PATENT OFFICE. f

Y'FRAN K H. WARREN,

or LYNN, AssieNoR To GEORGE H. P. ELAGG, or

BOSTON, MASSACHUSETTS.

CUTTER-GUARD.

SPECIFICATION. forming part of Letters Patent No. 514,741, dated February 13, 1894. l

Application tiled September 30. 1893. Serial No. 486,867. (No modelJ. v

To all whom it may) concern:

. Beit known that LFRANK H. WARREN, of Lynn, 1n the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Cutter-Guards, of which the following is a specification.

This invention has for its object to provide a guard adapted to cover the acting portion of a rotary cutter, such as is used for trimming parts of boots and shoes, for thel purpose of preventing injury to the article to be trimmed while said article is being presented to the cutter.

The invention is particularly intended for use 1n ,connection with inseam-trimming machines, of the character shown in Letters Patent of the United States No. 456,041, dated July 14, 1891, and No. 488,591, dated December 27, 1892. The machine shown in said patents comprises a rotary cutter adapted'to trim the upwardly-turned edges of the welt and upper of a welted boot or shoe. In the practical operation of said machine, it has been found that there is more or less liability 0f contact of the article to be trimmed, which I shall hereinafter call the work, with the cutter, before the work is in its proper position relatively to the cutter, so that there is liability of the work being injured by improper presentation to the cutter.

My invention prevents this liability, and consists mainly in the combination with a rotary cutter of a guard, movable in the arc of a circle over the perimeter of the cutter and normally held in position to cover the acting portion of the cutter; a slide movable on a fixed guide and provided with a rest which is located near the cutter, and occupies such position that the work, in being presented to the cutter, iirst bears on said projection and necessarily displaces the latter before it can come in contact with the cutter; and intermediate mechanism, connecting the said slide with the guard, whereby displacementlof the slide by the'contact of the work with itwill cause a displacement of theguard, so that, just as the work reaches a position-to receive the action of the cutter, the guard is withdrawn and exposes the acting portion of the cutter. Y

The invention also consists in certain rnechanical contrivances incidental to the geueral purposes above mentioned.

Of the accompanying drawings, forming part of this specification: Figure 1 represents 5 5 a front elevation of a portion of an inseamtrimming machine,pr0vided with myimprovements, the guard being shown in its normal position, covering the acting portion of the cutter. Fig. 2 represents a side elevation, 6o the guard being in the same position as shown in Fig. l. Fig. 3 represents a view similar to Fig. 2, showing the rest and the guard displaced by the work. Fig. 4 represents a section on line 4--4 0f Fig. 1. 65

The same letters of reference indicate the same parts in all the figures.

In the drawings: A represents the shaft, which supports the rotary cutter E and the feed-wheel N; and D represents the yielding- 7o ly-supported disk, which maintains the welt of aboot or shoe in engagement with the feedwheel; said parts being arranged as fully set forth in the above-mentioned Letters Patent.

a represents the guard, which as here shown, is composed of a curved plate, formed to partially encircle the perimeter of the cutter and to cover thel lower or acting portion thereof in such manner as to prevent the work from touching the cutter when the guard 8o is in its normal position.

The guard is afxed to a segmental plate or carrier a', formed on a collar 0.2, which is titted to turn loosely on a sleeve a3 affixed to the feed-roll N. The guard a is therefore adapted to move in a circular path, which is preferably concentric with the axis of the cutter.

The guard may be normally held in the position shown in Figs. 1 and 2 by any suitable 9o means. 4I have here shown a spring b, adapted to accomplish this purpose. said'spring acting on the guard through mechanism hereinafter described, although ity may be otherwise arranged to act directly on the guard, the essential thing being the yielding maintenance of the guard in its normal position, and its return to said position when the force' applied to remove it therefrom is discontinued. l

c represents a movable projectionI or rest, which is yieldingly supported ina-position IOC adjacent to the cutter and projecting somewhat below the same, the arrangement being such that the work, in being presented to the cutter, will bear on the rest before it reaches the cutter, and will necessarily displace the rest before it comes in contact with the cutter. The rest, as here shown, is composed of a roll, journaled on a slide c', which is fitted to move vertically in guides formed on a bracket F aixed to the frame of the machine, said slide being lieie shown as connected with said bracket by means of screws c2 c2, passing through slots c3 ca in the slide. The spring b above mentioned is attached at one end to the bracket F, and at its other end to the slide c.

The slide c is connected with the guardcarrier a by the following devices: e represents a lever, pivoted at e to the bracket F, and engaged at one end with the slide c by means of a pin e2, passing through a slote3in said lever, and secured to an arm on the slide c. f represents a rod, connecting the other end of the lever e with a pin or stud f on the carriei 0..

It will be seen that the spring b presses downwardly on the slide c', thus holding the same, together with the roll c, depressed as far as the screws c'rl and slots c3 will permit, the arrangement being such that the roll c is held below the lower portion of the cutter, as shown in Figs. l and 2.

Vlfhen the work is being moved upwardly toward the cutter, it first comes in contact with the roll c, pressing the latter and the slide c upwardly, and thus causing the intermediate parts e f to move the guard-carrier and guard in the direction required to withdraw the guard from under the acting portion of the cutter, so that, by the time the work reaches the cutter, the guard is removed from the acting portion thereof, as shown in Fig. 3. All liability of injuring the work by the cutter duringthe presentation of the work to the cutter is therefore obviated.

The bracket F is used, as shown in the above-mentioned Patent N o. 488,591, to guide a vertically-inovable spindle G, which is intended to impart a downward movement to the roll c when the operator desires to decrease tlie depth of the cut in the upwardlyturned edges of the work, a leverI being provided, which may be operated by a treadle, as shown in the last-mentioned patent, to press downwardly on the spindle G and thus depress the roll or rest c. In the Patent No. 488,591, the roll or rest was shown connected directly to the spindle G; but in the present instance, it being necessary to give the roll or rest the described guarddisplacing movement before beginning the cutting operation, the slide that supports the roll c is made independent of the spindle G.

To enable the roll or rest to be depressed by the operator, for the purpose of varying the depth of cut, as described in Patent No. 488,591, I provide the spindle with a shoulder j, and the slide c with a corresponding shoulder j', said shoulders being arranged so that, when the spindle is depressed by the act of the operator, the shouldery will strike the shoulderj and thus depress the roll or restc and cause the depression of the work, in the man ner described in the said Patent N o. 488,591. The depression of the slide c and roll oi' rest c accomplished for this purpose is very slight, and is not suiiicieiit to move the guard intol position to cover the'acting part of the cutter, the guard beingin its displaced or raised position when the operator exerts downward pressure on the spindle G to vary the depth of the cut. A springy5 is provided, as shown in said patent, to normally raise the spindle G, so that the shoulders y and are normally separated, as shown in Fig. 2.

l do not limit myself to the described details of construction or to the particular 1nteriiiediate mechanism used for connecting the rest or projection c with the cutter guard, as I desire to include Within the scope of my invention any construction and arrangement of parts which includes a guard movable 1n the arc of a circle over the perimeter of acrotary cutter, a slide movable on a xed guide adjacent to the cutter and a rest on said slide normally held in position to bear upon the work before the latter reaches the cutter, the arrangement being such that movement iinparted by the work to the rest is caused to impart to the guard a movement away from the cutter while the work is approaching the latter.

My invention is not limited to use 1n connection with the cutter of an inseam-trimming machine, and may be adapted to rotary cutters for various other purposes without departing from the spirit of the invention.

The spindle G is adjustable vertically by means of nuts G2 G3 G4, as shown in the lastmentioned patent, so that the shoulder j may be raised or lowered to vary the height of the rest c when the latter is raised to its highest position, the object of such variation being to make the maximum depth of cut greater or less.

As any adj ustinent of the spindle G would vary the distance between the shouldersjj' and the throw of the guard, without a corresponding adj ustinent of the slide c', I provide means whereby the slide may be adjusted without changing the positions of the connecting devices e f, said means comprising a plate c5, adj ustably secured to the slide c by screws c6 c6 passing through slots c" c7 in said plate, the plate being connected with the lever e. By loosening the screws c6, I am enabled to adjust the slide and the roll c up `or down, and thus compensate for any adjustment of the spindle G.

l claimf 1. The combination with a rotary cutter, of a guard movable in the arc of a circle over the perimeter of the cutter and normally held in position to cover the acting portion of the IOO IIO

in position to cover the acting portion of thecutter, a rest-carrying slide movable on a fixed guide and yieldingly supported in position for the rest to come in contact with the work be` fore the latter comes in contact with the cutter, the rest being adapted to be displaced by a movement of the work toward the cutter, and connections between the slide'and guard whereby movement is imparted from rest and slide to the guard, as set forth.

3. The combination with a rotary cutter, ofl

a movable guard mounted to move inthe arc of a circle over the cutter, a yieldingly-supv ported slide movable on a fixed guide and having a rest which normally projects below the acting portion of the cutter so that the work in being presented to the cutter will first strike K the rest and displace the same, and connections between the slide and guard whereby the guard is displaced with the rest and slide, as set forth.

4'. The combination of a rotary cutter, a movable guard mounted to move in the arc of a circle over the cutter, a slide movable on a fixed guide and provided with a rest c, connections between the slide and guard, and a spring which yieldingly holds the slide, rest, and guard in their normal positions, as set forth.

5. The combination of va rotary cutter, a guard movable in the arc of a circle and mounted to oscillate over the cutter, a rest or projection, such as c, a slide supporting said rest, a fixed guide for said slide, connections between the slide and guard, a vertically-movable spring-supported spindle or rod adapted to be depressed into contact with the slide and to depress the latter, and a spring which yieldingly holds the slide, rest, and guard in their normal positions, as set forth.

6. The combination of a rotary cutter, a movable guard mounted to oscillate over the cutter, a slide having a rest, such as c, connections including a lever e between the slide and guard, means for adjusting the slide verv tically with relation to said lever, a verticallymovable springsupported spindle or rod adapted to be depressed into contact with the slide, and means for vertically adjusting said spindle, as set forth.

In testimony whereof I have lsigned my name to this specification, in the presence of two subscribing witnesses, this 21st day of September, A. D. 1893.

' I FRANK H. WARREN. Witnesses:

C. F. BROWN, A. D. HARRISON.