US1157343A

US1157343A - Electrically-heated tool.

Info

Publication number: US1157343A
Application number: US625315A
Authority: US
Inventors: William I Thompson
Original assignee: ANTHONY M LUX; WALTER J LUX
Current assignee: WALTER J LUX; ANTHONY M LUX
Priority date: 1915-02-05
Filing date: 1915-02-05
Publication date: 1915-10-19
Anticipated expiration: 1932-10-19

Description

' W. I. THOMPSON.

-ELECTRICALLY HEATED TOOL.

APPLICATION FILED FEB. 5. 19I5.

Patented Oct. I9, 1915.

' UNITED STATES PATENT OFFICE.

WILLIAM I. THOMPSON, OF STONEHAM, MASSACHUSETTS, ASSIGNOB OF-ONE-T IBD TO AmoNYM. mm mm onn-rnmnro wanna .1. mm, BOTH or WOBURN, SSA- cnusnrr'rs.

ELECTBICALLY-HEA'IED TOOL;

1,157,343 Specification of Letters Patent. Patented Qct. 19, 1915 Application filed =February 5, 1915. Serial No. 5,253.

To all whom it may concern:

Be it known that I, WILLIAM I. THOMP- SON, a citizen of the United States, and resident of Stoneham, in the county of Middlesex and State of Massachusetts, have invented certain new -and useful Improvements in Electrically-Heated Tools, of which the following is a specification.

This invention relates to electrically heated tools, and particularly to such tools adapted for use in finishing external parts of boots and shoes.

The invention has for its object to provide a tool of this character of simpleand durable construction adapted to perform rubbin operations on a boot or shoe, and prefers. 1y adapted also to perform percussive operations.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompan ing drawings formmga part of this speci cat1on: Figure 1 represents a side elevation of a tool embodying my invention; Fig. 2 represents a longitudinal section on line 2-2 of Fig. 1;- Fig. '3 represents a section on line 33 of Fig. 1; Fi 4 represents a. sectional view of the tool body; Figs. 5 and 6 represent enlargements of ortions of Fig. 2.

he same-reference characters indicate the same or similar parts in all the views.

My improved tool includes a heating unit includin -a spool composed of a core 12 of heat-con ucting metal having an outer flange 13 integral with said core and -an inner flange 14, preferably ;.of insulating material such as mice, and. formed byes. sembling centrally perforated mica I disks on the reduced end portion 16 of the core. The flange 14. abuts against a shoulder 19 on the core, and is confined a amst said shoulder by a washer-20 applie to the re duced portlon 16 and rigidly secured by up setting the. end .ofsaid portion to form a head 21. The flange 14 is therefore inseparably secured'to the core by means unafl'ect-' ed by the expansion and contraction of the core. The outer end of the spool is re.-

vided' with an externally threaded stu '22" constitutin a heat-conducting coupling member adapted to detachably engage a threaded cavity 23 in the tool body 24 which acts upon a'boot or shoe' or other artlcle.

Upon the spool 12 and the, flanges there- I l t by n' of are wound coils 25 of resistance wire, the

coils being allformed' 'froina. single length of mm and insulated from eachjother pref erably'by layers of mica 2 59 applied during the winding operation. ,TheIouter-end convolutions of the wire areins'ulated from the flange 13'by a mica washer aliii- The resistance wire'coilsfare surrounded 'a-'-c ylin'- drical metal casing 26- which may; e' fsecured to the spool by one or more screws. .27 'en;

ga 'ng one of the spool'flangesiz' he casing 26"is provided witha' shank composed of an air-cooled spiderformed'by Inclined radial arms 29 integral with: the casing, and a tubularfportion 28; 'connected with the outer ends, of the arms. "The spider portion of the shank permits a--.f-ree circulation of air around the arms composing it,

so that the tubular'portion 28 is not liable resistance coils 25 are conducted throng the insulating flange 14tobinding posts 33 em-. bedded in said flange..-and-i=projecting into the air-cooled. spider, and at-said posts are connected with suitablyinsulated' leading wires 34 extending through the tubular shank portion '28. The s aces between the spider arms 29 permit ree accessj-to' the bmding posts 33; The wires 34 'e'xt'end to aicavity 36 in the outer end of the handle,

and through 'an inclined orifice 37 in the handle. The cavity 36 is closed by a plug' 38tsecured by screws 39. The passage 37 is inclined to permit the leading wires to pass laterally through the handle without being abru tly bent at 1 any point and without liabi ity ofthe injurious kinking of the usual: flexible extensions of said leading which are connected with the source of electrical energy. The leading wires are each" preferably composed of a ,lurality ofintertwisted strands of fine forming what is 'kno'w'n'as. i tai l wire and- -;ofas a tos-cord, each one 11 0,

i see head.

wound in the opposite'direction from the other.

The spool 12 andits flanges 13 "and 14;, and the casing 26, constitute a rigid holder for the resistance wire, said holder carrying the coupling member 22 and the handle, and closely fitting the socket. hereinafter referred to, formed in the body.

The tool body 24 has a cylindrical socket 40 open at the inner. end of the body and formed to snugly and removably fit the casing 26. The partially cylindrical portion of the wall of said socket is adapted to serve as a hammer head by which the operator can perform various percussive as well as rubbing operations on the external surface of a boot or shoe. Said portion is relatively thick and is reinforced or backed by the casing 26, which also has a substantial thickness, and in efiect is a part of the hammer The rubbing or burnishingportions of the body are preferably formed by a flat face 42 forming one side of the body and extending from end to end of the body, and an inclined marginal face 48 which intersects the margin of the face 42 at a substantially acute angle, and is substantially U-shaped and extends transversely across the Y outer end of the body and longitudinally alo'ng the sides thereof. In other words, the faces 42 and 43 form a thin-edged lip having a U- shaped edge extending lengthwise and across thebody one side of said lip formed by the face 43 being inclined, and the other side fiat. A considerable portion of each of saidfaces is in close proximity to the heatmg unit and adapted to be quickly heated thereby and to conduct heat to other portions of'said faces.

The body is detachably secured to the spool by theengagement of the stud 22 with the cavity23, and the outerface of the spool .5 flange 13 abuts against the inner end ofthe.

socket 40,. so that heat is directly conducted to the body by said flange as well as by the casing 26. Since the burnishing faces extend from end to end of the body, their inner end portions are in close proximity not only to the heating unit, as above stated, but also to the handle. The length of .the tool as a whole is therefore reduced to the mim- "mum, so that the muscular exertion and fatigue of the operator in manipulating the tool are correspondingly reduced.

The body formed as shown is adapted. to act on bread surfaces and on the sides of creases such as the crease between the welt and upperof a shoe. a

Theportion of the body 24 containingthe socket 4O constitutes a tubularend portion, and the portion at the inner end of the socket constitutes a solid end portion, which contains the coupling member 22 and 1s uniformly affected by heat conducted from the resistance wire through the holder" 12 and coupling member 22. The burnishing face 42 is formed partly on the solid portion and partly on the tubular portion. The heatconducting coupling member 22 is therefore located centrally with relation to said. face, so that the heat conducted thereby is quickly and uniformly distributed throughout the entire area of said burnishing face. The same statement is applicable to the burnishing face 43.

The casing 25 inclosing the heating unit and closely fitting the body socket 40, and the air-cooled spider and tubular shank portion united to said casing, constitute a strong and durable means forfholding the handle 30 in close proximity to the body 24, preventing the heating of the handle, and reinforcing the tubular portion of the body.

Said casing and the heating unit are adapted to be applied to and removed from the body as a single part, and are readily separable to'perinit access to the resistance wire.-

Having described my invention, I claim: 1. An electrically heated tool comprising i a body having a burnishing face or faces and a cylindrical socket which is open at one end of the body, an electrical heating unit, a cylindrical casing detachably secured to and inclosing said unit and provided with a shank composed of spaced arms joined to the casing and forming an air-cooled spider, and a tubular portion joined to said arms and spaced from the casing and heating unit thereby, a handle mounted on said tubular portion and held thereby in relatively close proximity to the said casing and unit, and spaced therefrom by said spider, and conducting wires extending through said. tubular portion and handle, the heating unit comprising a resistance wire whose termi-- which is open at one end of the body, an

electrical heating unit comprising a spool having-inner and outer flanges, the outer flange being provided with outwardly projecting binding posts, and a resistance wire wound upon the spooh'the terminals of said wire extending through the outer flange-and -engaging said binding posts, means being provided for detachably connect1ng the spool and body, cylindrical casing detacna bly fitting said socket, seated upon and ex tending between said flanges, and detachably 2. An electrically heated tool comprising-v secured to the spool, said casing being provided with a shank composed of spaced arms forming an air-cooled spider, and a tubular portion projecting from said spider, a handle mounted on the tubular portion of the shank with its inner end in close proximity to the body and heating-unit, and spaced therefrom by the spider, andconducting Wires extending through the shank and connected with the resistance wire terminals at ,said binding posts, the spaces between the spider arms not only permitting a free circulation of air to cool the shank, but also permitting access to said binding posts.

3. An electrically heated hammering and burnishing tool comprising a body having a cylindrical socket which is open at one end of the body, the opposite end being closed, a

portion of said socket wall havin a rounded external face capable of use as a hammer 21) head, while another portion of said Wall has a flat burnishing face extending from end to end of the body, and a U-shaped burnishing face inclined relatively to said fiat face and intersecting the latter to forman acute angled U-shaped burnishing edge extending along both sides of the body and across its outer end, and an electrical heating unit removably inserted in said socket.

In testimony whereof I have afiixeid my 30 signature, in presence of two witnesses.

WILLIAM I. THOMPSON.

Witnesses:

LILLIAN M. THOMPSON, GEORGIANNA F. THOMPSON.