US2004580A - Electric scroll saw - Google Patents

Electric scroll saw Download PDF

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Publication number
US2004580A
US2004580A US715835A US71583534A US2004580A US 2004580 A US2004580 A US 2004580A US 715835 A US715835 A US 715835A US 71583534 A US71583534 A US 71583534A US 2004580 A US2004580 A US 2004580A
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wire
frame
means
slide
resistance
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US715835A
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Edwin L Meyer
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Edwin L Meyer
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B3/00Ohmic-resistance heating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27MWORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/06Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by burning or charring, e.g. cutting with hot wire
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B2203/00Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/03Heaters specially adapted for heating hand held tools
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/687By tool reciprocable along elongated edge
    • Y10T83/69Stored energy furnishes drive in one direction

Description

June 11, 1935. E, MEYER ELECTRIC SCROLL SAW Filed March 16, 1934 Patented June 11, 1935 UNITED STATES PATENT OFFICE ELECTRIC SCROLL SAW Edwin L. Meyer, Bridgeport, llonn.

Application lllarch 16, 1934,, Serial No. 715,835

16 Claims, ((31. 219 -29) and in way out out designs and do other wo usually done with a scroll saw.

"-on of a device of this kind having a pistol 3:: so disposed that long legs of the U-shaped frame are held vertically so that the motions of the cutting Wire may. be in a substantially horizontal plane while the work is held vertically. 'Wi'i tools of this kind as heretofore provided, the worlr was held horizontally and the cutting element was moved vertically. It has been found that by having the cutting element disposed as alcove stated, the cutting element may be con trolled and the work may be done with greater ease and accuracy. While being reciprocated horizontally, the tool may be moved vertically or laterally as the work progresses without tiltingor swinging the frame, for the incandescent wire is operative on all sides.

Another feature of this invention is the provision of a switch on the handle for opening and closing the circuit including the resistance wire. By manipulating the switch, the wire may be made incandescent only when this is actually re quired. The finger-piece for the switch is in the shape of a trigger and is carried by the handle or grip in the position usually occupied by a trigger in a pistol.

Another feature of this invention is the rovision of means for controlling the operative length of the wire. Should it be found that because of the thickness or characteristic of the wood worked upon the wire cools too rapidly upon contact with the wood, this resistance wire in effect may be shortened so as to increase its resistance and raise its temperature. This is of gi'eat practical importance, since, by a simple adjustment, the desired working temperature of the wire can be obtained. 7

A further feature of the present invention is.

applied to wood, bowing of the wire is permitted with the result that a flat-bottom out is not produced. According to the present invention, the frame is made relatively rigid and one end or the wire is yieldingly mounted, y; x mounting for that end of the wire operates ciently only when pulled in a direction p to the wire, when a lateral pi'essr-"e s ap plied thereto, as ls ively no tar to the present invention, the light is on so long as the tool is connected to a source of current and is not affected by the operation of the switch controlling the passage of current to the cutting wire.

One of the more important features .of the present invention is the employment of supply current of very low potential and high current, and the heating wire employed is suited to these conditions. The current supply is preferably obtained from a transformer connected to alternating house current. By employing current having a potential of a fraction of a volt which has been found satisfactory, there isavoided the danger of the user being shocked or injured by short-circuiting the terminals with part of his body when applying or adjusting the wire, or by casual contact in the use of the device.

Other features and advantages will hereinafter appear.

In the accompanying drawing Figure 1 is a side elevation of the electric saw of the present invention.

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1, and showing the means for securing the end of thewire remote from the handle.

Fig. 3 is a detail view, partly in section, taken on the line 3-4 of Fig. 1. v 5

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 1. i

Fig. 5 is a vertical sectional view, taken on the line 5-5 of Fig. 1.

Fig. 6 is a transverse section through the handle, taken on the line 6-6 of Fig. 1.

Fig. 7 is a sectional view showing the means for securing the end of the wire adjacent the handle.

means for supplying current to $7,: tool.

" may make the'wire 3| incandescentor not at a relatively large U-shaped frame I having an upper horizontal leg H and vertical legs l2. One otthe legs I! is made somewhat shorter than the other, and has its end fitting in a socket l3 in a handle I4 having a pistol grip IS. Thepistol grip includes a central metal portion l5 and side portion ll of wood. Between these there is provided a chamber or opening l8 through which pass current supply wires I3. These wires enter the handle through a bushed opening 20 at the bottom of the pistol grip. 7

At the lower end of the longer leg i2 of the frame there is secured a T-shaped bearing member 2| having a square hole 22 in which there is slidably mounted a square rod or slide 23. One end of this rod carries a nut 24 against the head of which bears a spring 25 tending to move the slide in the direction of the arrow shown in Fig. l. The other end of the slide carries a flange 26 limiting the movement of the slide in the direction of the arrow shown in Fig. 1. Beyond the flange 26, the slide has a fiat portion or shelf 2,1 on which is carried a clamp 28 having a screw 29 hearing on one side of the shelf H and a saddle 30 located at the opposite side of the shelf.

This clamp or binding post is intended to secure to the slide 23 a high resistance Wire 3! which is the cutting element of the present invention. When the wire is slid between the shelf 21! and saddle 3d and the screw 28 rotated, the saddle is drawn up to securely clamp the wire to the shelf. The shelf may have a V-shaped notch 32 as shown in Fig. 2, to locate the wire centrally of the rod.

The opposite end of the wire 3| *is secured in place by a similar clamp 28(but in this case the is formed on a stud 33 having a head 34 engaging the inner end of a bushing 35 mounted in a screw-threaded portion 36 in the metal mem-= her Is of the handle. Thebushing 35 is made of insulating material and is applied to the stud,

before the clamp 28 is mounted on the shelf 27!, and serves to insulate the stud, clamp and the near end of the wire 3| from the handle.

The remote end of the wire 3| is connected to the sourceof current through the slide 23, bearingv 2|, frame I0, and metal member I6 of the handle by means of 'a binding screw 31 carried by the portion I 3 and connected to one wire 38 of the cable supplying the device with current. The other or near end of the wire 3| is connected to a source of current when desired by a switch blade 39 connected to a binding post 40 carried by and insulated from the handle and connected vto the other wire 4| or the cable supplying curthere is provided a trigger 42 pivoted at 43 and having an arm 44 engaging the switch blade and in position to move the switch blade into contact with the head 34. The trigger 42 is placed on the handle l5 in the position corresponding to the trigger of a pistol, and hence, by merely pressing on and releasing the trigger", the user will. I

When the wire 3| becomes heated and incandescent, it naturallyincreases in length or elongates. This would cause it to sag unless provisions were made to avoid it. According to the present invention, this is done by securing the remote end of the wire 3| on the slide 23 in such a way that the spring 25 tends to move the slide in the direction of the arrow, thereby keeping the wire under tension and taut. When, however, the wire is applied with some force to the work, it is undesirable that the wire bow substan t'ally, and accordingly at this time the slide should not move easily. By making the slide square, the tendency for the slide to move when the wire is applied to the work is avoided, the lateral pressure on the slide causing the flat side of the slide to engage the fiat surface of the hole 22 and bind in whatever position it may at that time be.

By providing these means for holding and con trolling the remote end of the resistance wire, the U-shaped frame It may be made substantially rigid so that it may impart true and intended motion to the resistance wire in tracing a design.

In order to facilitate the tracing of the design with the resistance wire 3|, the saw, according to the present invention, is provided with a lamp 45 mounted in a socket 46 in the metal part I6 of the handle and extending into the chamber IS. The center contact of the lamp is engaged by an upper extension 47 on the switch blade 39. It will thus be seen that the lamp 45 will glow continuously even though the switch blade 39 is disengaged from the head 34 of. the wire holding upright. The trigger 42 is then operated to'close I the circuit and causing the wire 3| to become incandescent, or at least hot enough to cut the wood. When the wire is so conditioned, it is drawn back and forth over the wood following the outline of the design to' be cut. The back and forth motion of the wire is necessary, since, according to the present invention, the cross section and heat of the wire is such that if allowed to remain in one position, the portion in contact with the ,wood would cool so rapidly as not to burn. By moving the wire back and forth, a hot portion of the wire is constantly beng applied to the wood,and the portion just leaving the wood has an opportunity to become reheated.

In practice, it is sometimes desired to have the wire 3| hotter than other'times. For this purpose, the wire-3| is made longer than the normal distance between the clamp 28, and a portion of the end of the wire 3| 0. is allowed to project beyond the clamp in the passage 23a in the slide 23. If it is desired to make the wire hotter than normal, the screw on the slide 23 is loosened and the slide is pulledout farther than normal, thus shortening the; wire electricallinthe surplus end 3la projecting-further into theopening 23a. If a cooler wire is desired, rever'seoperations are performed.

' As diagrammatically illustrated in Fig. 8, the

wires 38 and 4| are connected to a secondary Winding 41 on a transformer 48 having a primary winding 49 connected to} the commercial power line 50.

The ratio of the windings 41 and 49 1 is such that an electromotive force ofisomewhat less than one volt and proportionatelyhigh cub rent is impressed on the circuit including the wires 38 and 4| and the heating wire 3]. Cur-v rents ofsuch valuei arenot harmful, and accord aooasso ingly the saw may be handled anywhere desired, or may be contacted with casually without shock 'imury, except, of course, by contacting directly ti e incandescent wire it which would produce a In i there is shown a modified form of clamp for holding the remote end of the resistance wire ll. pair of jaws El pivoted on the reduced end 52 of longer leg ll of the frame and having opposite the pivot 52 arms 55 across which there is connected a spring 56 tending to pull the arms andv jaws 5i together so that the latter may tightly grip the end of the resistance wire 3|. To release the jaws, a pair of toggle-links 55 are connected to the ends of the arms 53, and at the pivot point of the toggle-links there is provided a fdngenpiece Ell.

Upon applying pressure to the finger-piece 51, the toggle-links 55 move toward straightened or parallel positions, and, in doing so, spread the arms 53 jaws iii to permit the removal or insertion of the end of the resistance wire 3! between them. Upon release of the finger-piece 51, the spring draws the jaws 5! together. By having the actuating device for the jaws in the form of the toggle, the jaws may be easily opened in spite of the fact that the spring 54 is very strong.

The form of the invention shown in Fig. 9 is particularly advantageous when the work to be done requires that the wire at be passed through a perforation or drilled hole in the work, for in this case the wire 3! may be threaded through the hole and easily and quickly clamped in the remote or opposite end of the frame, the near end of the wire being attached to the binding post on the handle.

Variations and modifications may be made within the scope of this invention and portions of the improvements may be used without others.

Having thus described the invention, what is claimed as new and for which it is desired to obtain Letters Patent, is:-- r

An electric scroll saw comprising a rigid U- shaped frame; a resistance wire; and binding posts on opposite legs of the frame having thumb screws for clamping the resistance wire and holdthe wireacrcss the open end of the frame, one of binding posts being yieldlngly and mounted on the leg of the frame carrying it holding the resistance wire taut as it d contracts incidental to the heating of the wire.

An electric scroll saw comprising a rigid U- frame; a resistance wire; and binding posts on opposite legs of the frame having thumb screws for clamping the resistance wire and holding the wire across the open end of the frame, one of said binding posts being yieldingly mounted on the leg of the frame carrying it and holding the resistance wire taut as it expands and contracts incidental to the heating and cooling of the wire, said binding post being mounted on a slide and said slide having a bearing on the leg of the frame on which it is carried, and a spring normally tending to move the slide and applying a stretching action to the wire to maintain it taut.

3. An electric scroll saw comprising a rigid U- shaped frame; a resistance wire; and binding posts on opposite legs of the frame having thumb screws for clamping the resistance wire and holding the wire across the open end of the frame, one of said binding posts being yieldingly mounted on the leg of the frame carrying it and holding the resistance wire taut as it expands and con-- em: r

in this form, there is'provlded a tracts incidental to the heating and cooling of the wire, said binding post being mounted on a slide and said slide having a hearing on the leg of the frame on which it is carried, and a spring normally tending to move the slide and applying a stretching action to the wire to maintain taut, said slide and bearing therefor being square in cross-section whereby the slide tends to jam in the bearing when pressure is applied laterally to the slide to prevent excessive bowing of the resistance wire when applied to the work.

4. An electric scroll saw comprising a rigid U- shaped frame; a resistance wire; and binding posts on opposite legs of the frame having thumb screws for clamping the resistance wire and holding the wire across the open end of the frame, one of said binding posts being yieldingiy mounted on the leg of the frame carrying it and holding the resistance wire taut as it expands and contracts incidental to the heating and cooling of the wire, said binding post being mounted on a slide and said slide having a beaing on the leg of the .frame on which it is carried, and a spring normally tending to move the slide and applying a stretching action to the wire to maintain it taut, the engagement between the slide and its bearing being such as to tend to cause the slide to jam and remain held against longitudinal movement when lateral pressure is applied to the slide.

5. An electric scroll saw comprising a rigid U- shaped frame; a resistance wire; and binding posts on opposite legs of the frame for clamping the resistance wire across the open end of the Elli till

frame, one of said binding posts being yieldingly mounted on the leg of the frame carrying it and holding the resistance wire taut as it expands and contracts incidental to the heatingand cool ing of the wire, said binding post being mounted on a slide and said slide having a bearing on the leg of the frame on which it is carried, and-a spring normally tending to move the slide and applying a stretching action to, the wire to maintain it taut, said slide having a passage in line with the wire to receive the end of the wire when the slide is moved longitudinally with relation to the wire to shorten the effective length of the wire and thereby cause the wire to be brought to a greater degree of incandescence when energized.

6. An electric scroll saw comprising a suhstantially U-shaped frame; a handle secured to one of the legs of the U'JSI'IELDB frame; a resistance wire stretched across the open side of the frame; a pair of binding posts, one securing and electri caily connecting one end of the resistance wire to thefranie and the other securing the other end ofthe resistance wire to the handle and insulated therefrom and from the frame; a current supply wire connected to the frame; a switch blade; at current supply wire connected to the switch blade; and a finger piece for moving the blade into engagement with the binding post which is insulated from the handle and frame.

'7 An electric scroll saw comprising a substantially 'U-shaped frame; a handle secured to one of the legs of the U-shaped frame; a resistance wire stretched across the open side of the frame; a pair of binding posts, one securing and electrically connecting one end of the resistance wire .to the frame and the other securing the other blade into engagement with the binding post tially U-shaped frame; a handle secured to one of the legs of the U-shaped frame; a resistance wire stretched across the open side of the frame, said handle having a chamber therein open at the bottom; current supply wires entering the chamber through said opening and terminating in said chamber, one of said wires being connected to the frame and from the frame to due end of the resistance wire; a. switch in said chamber for connecting the other wire to the other end of the resistance wire; and a lamp carried by the handle connected to said ungrounded current supply wire independently of said switch.

9. In a device of the character described, an

electric resistance wire forming a burner element;

a frame in which said wire is carried and having an open side across whichxthe said wire is stretch= ed, said frame having a hand grip the axis of which forms an angle of greater than 30 with the axis of the wire by means of which hand grip the frame is manipulated to draw the resistance 'wire over the work; means for supplying low voltage high amperage currents to said wire to heat the same, said means including a transformer supported independently of said frame and having a primary connected to a source of house current, a secondary, flexible wires conmeeting the secondary withsaid resistance wire, and a switch carried by the frame to open and close the circuit including, said secondary and said resistance wire; and a finger-piece for said switch carried by the hand grip to be operated by the finger of the operators hand holding the hand grip to instantly openand close the circuit leading to the resistance wire.

iii. In a device of the character described, an electric resistance wire forming a burner element; a frame in which said wire is carried and to which one end of the wire is electrically connected, hav ing an open side across which the said wire is stretched and having a wire holder insulator for the frame, saidframe having a hand grip by means of which the frame is manipulated to draw the resistance wire over the work; means for supplying low voltage high amperage currents to said wire to heat the same, saidmeans including a transformer having a primary connected to a wires connecting the secondary with said resistance wire, one of said wires being electrically con-- nected to the frame, and a switch carried by the frame to open and close the circuit including said secondary, one of said flexible wires, said-resistance wire, the frame, and the other flexible wire at a point between the flexible wire and insulated resistance wire holder; and a finger-piece for said switch carried by the hand grip to be 'operated by the finger of the operators hand holding the hand grip to instantly open and close the circuit leading to the resistance wire. I

11. In a device of the character described, an electric resistance wire forming a burner element; a frame in which said wire is carried and having an open side across which the said wire is stretched, said frame having a hand grip the axis of which forms an angle of greater than 30 with the axis of the wire, by means of which hand grip the frame is manipulated to draw the resistance wire over the work; means for supplying the frame;

low voltage high amperage currents to said wire to heat the same, said means including a switch carried by the frame; and a finger-piece for said switch carried by the hand grip to be operated by the finger of the operators hand holdingthe hand grip to instantly open and close a circuit supplying current to the resistance wire.

12. An electric/scroll sawcomprising a rigid U-shaped metal frame; a resistance wire adapted to be removably carried across the open side of manually releasable wire-gripping means on opposite legs of the frame; means for mounting one. of said wire-gripping means on one leg of the frame in position fixed against movement axially of the wire; means for mounting the other wire-gripping means on the other leg of the frame for slidable movement relative to the frame and axially of thewire; resilient means normally tending to cause the slidably mounted wire-gripping means to move axially of the wire away from theother wire-gripping means to hold the wire gripped thereby taut, said slidably mounted wire-gripping means being in electrical engagement with the frame; means for insulating the fixed wire-gripping means from the frame; and means for supplying currentto the resistance wire through said frame.

13JAn electrical scroll saw comprising a U- shaped metal frame; a resistance wire adapted to be removably carried across the open side of the frame;; manually releasable wire-gripping means on opposite legs of the frame; means for mounting one of said wire-gripping means on one leg of the frame in position fixed against movement axially of the wire; means for mount;- ing the otherwire-gripping means on the other leg of the frame for slidable movement relative to the frame and axially of the wire; resilient means normally tending to cause the slidably mounted wire-gripping means to move axially of the wire away from the other wire-gripping means to hold the wire gripped thereby taut, said slidably mounted wire-grippingmeans be ing in electrical engagement with the frame; means for insulating the fixed wire-gripping l means from the frame; flexible wires for supplying current to said resistance wire, one of said wires being in electrical engagement with the frame; and manually "operable means for @188? trica'lly connecting the other wire to the fixed and insulated wire-gripping means.

14. An electric scroll saw comprising a U- shaped metal frame; a resistance wire adapted to be removably carried across the open side of the frame; manually releasable wire-gripping means on opposite legs of the frame; means for mounting one of said wire-gripping means on one leg of the frame in position fixed against movement axially of the wire; means for mounting the other wire-gripping ineanson the other leg of the frame-for slidable movement axially of the wire; resilient means normally tending to cause the slidably mounted wire-gripping means to move axially of the wire away from the other wire-gripping means to hold the wiregripped thereby taut, said slidable wire-gripping, means being in electrical engagement with the frame;

-means for insulating the fixed wire-gripping trical engagement with the frame; and manual- 1y operable means on the hand grip for electrithe wire gripped thereby taut; and means for axially of the wire; means for mounting the other wire-gripping means on the other leg of the frame for slidable movement relative to the frame and axially of the wire; resilient means normally tending tocause the slidably mounted wire-gripping means to move axially of the wire away from the other wire-gripping means to hold 16. An electric scroll saw comprising a U- shaped frame; a. resistance wire adapted to be removably carried across the open side "of the frame; manually releasable wire-gripping means on opposite legs of the frame; means for mounting one of said wire-gripping means on one leg of the frame in position fixed against movement axialiyof the wire; means for mounting the other wire-gripping means on the other leg of the frame for slidable movement relative to the frame and axially of the wire; resilient means normally tending to cause the slidably mounted wire-gripping means to move axially of the wire away from the other wire-gripping means to hold the wire gripped thereby taut; and means for supplying current to said resistance wire, the slidable wire-gripping means having a pair of wire-gripping jaws normally urged toward each other to grip the end or the wire, and means connected to the jaws including a finger-piece adapted to be moved in a direction toward the wire to open the jaws to receive' the wire and at the same time to cause the wire-gripping means 'to slide toward the wire against the tension of it away from the

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2546164A (en) * 1949-12-29 1951-03-27 Neil S Norris Apparatus for welding thermoplastic bodies
US2577745A (en) * 1948-11-19 1951-12-11 Foster Lee Cutter for solid carbon dioxide
US2646494A (en) * 1950-06-21 1953-07-21 George B Hart Inc Unit for cutting materials by heat
US2670018A (en) * 1949-09-30 1954-02-23 Alta Engineering Company Rotary cutting tool
US2789199A (en) * 1951-11-15 1957-04-16 Johan A Bjorksten Apparatus for making fiber articles
US2827743A (en) * 1954-04-13 1958-03-25 Grace W R & Co Apparatus for use in the wrapping of packages
US2894106A (en) * 1956-04-06 1959-07-07 Applic Generale D Electricite Device for hot cutting of woven or knitted materials of synthetic thermo-fusible fibers
US2972669A (en) * 1957-10-25 1961-02-21 Clyde A Brown Materials cutting apparatus and method
US3074811A (en) * 1957-04-22 1963-01-22 Radiation Res Corp Method for preparing sources of ionizing radiation
US3297856A (en) * 1964-07-30 1967-01-10 Wonder Products Inc Electrically heated tool for cutting plastics
US3711677A (en) * 1970-03-11 1973-01-16 Rubie Nell Little Howell Automobile windshield and backglass removal tool
US5980370A (en) * 1998-05-14 1999-11-09 Chang; Chun Yuan Saw having coated abrasive cable
US20110247224A1 (en) * 2010-04-09 2011-10-13 Alltrade Tools Llc Cable saw system
US20120132637A1 (en) * 2010-11-30 2012-05-31 Timothy Effrem Wood burning apparatus
US20130233842A1 (en) * 2012-03-12 2013-09-12 Cornelis Christianus Pys Vehicle Glass Removal System and Method

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577745A (en) * 1948-11-19 1951-12-11 Foster Lee Cutter for solid carbon dioxide
US2670018A (en) * 1949-09-30 1954-02-23 Alta Engineering Company Rotary cutting tool
US2546164A (en) * 1949-12-29 1951-03-27 Neil S Norris Apparatus for welding thermoplastic bodies
US2646494A (en) * 1950-06-21 1953-07-21 George B Hart Inc Unit for cutting materials by heat
US2789199A (en) * 1951-11-15 1957-04-16 Johan A Bjorksten Apparatus for making fiber articles
US2827743A (en) * 1954-04-13 1958-03-25 Grace W R & Co Apparatus for use in the wrapping of packages
US2894106A (en) * 1956-04-06 1959-07-07 Applic Generale D Electricite Device for hot cutting of woven or knitted materials of synthetic thermo-fusible fibers
US3074811A (en) * 1957-04-22 1963-01-22 Radiation Res Corp Method for preparing sources of ionizing radiation
US2972669A (en) * 1957-10-25 1961-02-21 Clyde A Brown Materials cutting apparatus and method
US3297856A (en) * 1964-07-30 1967-01-10 Wonder Products Inc Electrically heated tool for cutting plastics
US3711677A (en) * 1970-03-11 1973-01-16 Rubie Nell Little Howell Automobile windshield and backglass removal tool
US5980370A (en) * 1998-05-14 1999-11-09 Chang; Chun Yuan Saw having coated abrasive cable
US20110247224A1 (en) * 2010-04-09 2011-10-13 Alltrade Tools Llc Cable saw system
US20120132637A1 (en) * 2010-11-30 2012-05-31 Timothy Effrem Wood burning apparatus
US9248692B2 (en) * 2010-11-30 2016-02-02 Timothy Effrem Wood burning apparatus
US20130233842A1 (en) * 2012-03-12 2013-09-12 Cornelis Christianus Pys Vehicle Glass Removal System and Method
US9992820B2 (en) * 2012-03-12 2018-06-05 Cornelis Christianus Pys Vehicle glass removal system and method

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