US 2665500 A
Description (OCR text may contain errors)
Jan. 12, 1954 E. L. zl-:HRBACH 2,665,500
DRIERl APPARATUS Filed Deo. 6, 1949 5 Sheets-Sheet l wlTNEssl-:s: INVENTOR Qq EDGAR I .zEHRBAcH BY @12M /f ATTORNEY E. zEHRBAcH 2,665,500
DRIER APPARATUS 3 Sheets-Sheet 2 Jan. 12, 1954 Filed Dec. e, 1949 INVENTOR 1 EDGAR L. zEHBBAcH BYW-M ATTORNEY.
WITNESSES; Ik a Jan. 12, 1954 E. zEHRBAcH DRIER APPARATUS 5 Sheets-Sheet 3 Filed DeC. 6, 1949 INVENTOR ATTORNEY EDGAR L. ZEHRBACH wlTNEssEs;
Patented Jan. l2, 1954 Dama' APPARATUS Edgar L. Zehrbach, Ma
Westinghouse Electri nslield, Ohio, assigner to c Corporation, East Pittsburgh,'Pa'., a corporation of Pennsylvania Appiieetiei December s, 1949. seal No. '131,447
4 Claims. 1 My invention relates to apparatus lfor drying fabrics or the like and, particularly, to domestic type clothes drying apparatus. invention is to provide improved apparatus of this kind. t l y Many clothes driers of the` domestic type are installed in laundries or other rooms and discharge air employed for drying directly into the room in which they arelocated. During operation, lint which clings to the clothes is separated therefrom and is carried in suspension in the air discharged from the drier. A lint trap of foraminous construction is usually removably carried by the Vdrier structure for the separation of the lint from the discharged air. For the sake of appearance and because of space limitations, such traps are small and, therefore,`require frequent cleaning. Many operators are negligent in this respect with the result that the traps'become clogged with lint and interfere with the discharge of air from the drier.4 For best results, the trap should be cleaned after each op-v eration of the machine. -v Y In accordance with my invention, means is provided for indicating to the operator that the-trap should be cleaned, which means is activated inf response to the opening of the door of the drier for the removal of the dried fabrics.
Preferably, the trap structure is actuated to a position on the drier where it will be visible to the operator each time the door` Yof the drier is moved to its full 'open position for kthe removal of the fabrics from the drier. In the aotive vor operating position of the trap, it is out of view on a side wall of the `drier forthe sake of appearance. When the door Vis opened, the
trap is moved, automatically, to a position wherein' it partially extends above Vthe top wall of` the drier casing. Accordingly, the operator is warned that the trap should be cleaned. Some notifica` tion to this eiect may be printed o r stamped on the trap. The arrangement is such'that'the door may be partially opened for adding a Ygarment to the drier or for inspecting the load 'without actuating the trap, as described; totherwarning position thereof above the wall ofthe casing.'
A further object'of my invention is to provide an improved domestic clothes drier having pro-1 visions for warning the operator that the trap should be cleaned each timethe drier isv operated.
A still further object vof the invention is to actuate the 'lint trap of a drier toa warning position on the drier in responsetormovement ofthe'rdoor ofthe drier to openpo'siton- An object of myr These and other objects are effected by'my invention as will beapparent from the following description and claims taken in connection with the accompanying drawings, forming a part of this application, in which:
Fig. l is a front elevation of a domestic clothes drier constructed and arranged in accordancel Fig. 2 is a vertical sectional view taken through Fig. 4 is a section taken'along the line IV -1 \II of Fig. 3; Fig. 5 is a front elevation of a portion of the casing and showing the upper end of the Alint trap in a different position on the casing; and
Fig. 6 is an enlarged section of a latch structure shown in Fig. e
Reference will now be had to the drawing wherein I have elected to disclose my invention applied to a domestic type clothes drier having an outer casing structure generally indicated, at
I0 and including a rear wall II and a frontwallj I2, an upper portion I3 of the latter being n' clined rearwardly and upwardly of the casing structure I0. Arranged'withinthe casingstructure Ie is a generally cylindrical baille ,I4 which denes and encloses a drying'chamber I5 within the casing. The baille I4 has the rear end thereof welded or otherwise secured to the reary wall I I" of the casing and the front end of the baille I4 is connected to the front Wall portion I3 vof the casing by a chute I6 which, as shown, `diyergfesfrom the outer casing toward the baille III'.` The outer end of the chute I6 is secured in any well understood manner to Vthe front wall of the kcasing and the inner end ofI the chute I6 iswelded or otherwise secured, as shown at 'I'I,'to`, the front endof the bale I4. The open front end of the chute is closed by a door 'I8 having a'pair of .supportingV brackets I9 which are hingedropn bolts 2l, vthe latter being carried by the `front wall I2 of the casing in any wellr understood manner. .l
Arranged within the drying chamber, I5E isfa basket generally indicated at 22 and including a cylindrical side wall 23 which is per forat`e, sub-`r stantially, 'throughout' its extent,f a I' number .off the perforations being indicated at 2lI." The'V basket 22 is Valso provided withfapluralitypofv,
radially, inwardly extendingvvanes 25` whichV function to tumble the fabrics during rotation of the basket. The front end wall of the basket, indicated at 26, is provided with a relatively large access opening 21 which registers with the inner end of the chute I6. A rear wall 28 of the basket is secured in any well understood manner to a shaft 29, the latter being journaled in a suitable bearing 3I carried by the rear wall I I of the casing.
Rotation of the basket is effected in any conventional manner by an electric motor 32 mounted in a lower portion of the casing I2 and having a shaft 33. The shafts 29 and 33 may be connected by a suitable belted transmission generally indicated at 34 and including a driving.
pulley 35 and a driven pulley 36. It will be noted that intermediate driving and driven pulleys may be employed for providing `the speed reduction required, but these have not been shown for the sake of brevity and clearness.
The motor 32 also functions to drive a blower, the rotor of which is indicated at 31 and keyed or'otherwise secured to the shaft 33. The rotor 31 of the blower operates within a blower casing 38 which is formed at one end of a duct structure 39, the latter extending transversely of the casing and supporting, in part, the cylindrical baiile I4. During operation of the motor, air enters the casing structure I from the ambient atmosphere through a plurality of openings 4I and enters the blower casing 38 through a relatively large inlet opening 42. The air is passed through the duct structure 39 and is heated by anelectric heater 43. The latter is preferably formed of bare resistance wire and supported in any understood manner by a plate 44 which functions vto close a service opening 45 formed in the front wall of the duct 39.
` Heated air passes from the duct structure 39 through' a conduit 45 to the chute I6 and thence through the access opening 21 of the basket into contact with fabrics which are elevated and dropped by the basket during its rotation. The heated air abstracts moisture from the fabrics and is discharged from the drying chamber I5 into a bok Astructure 41 carried in the upper right hand'side of the casing III,` as shown in Figs. l and 2. The rear wall II is provided with a discharge opening, indicated at 48 and best shown in Fig". 4, for the passage of air and moisture from the box 41 to the ambient atmosphere. A drier having air circulating features of the type described up to now is disclosed and claimed in the copending application of Ray T. Wakefield, Serial No. 127,454 filed November l5, 1949, and assigned to the assignee of the present application.
In the operation of a drier of the type disclosed, lint which clings to the fabrics is dislodged therefrom during their tumbling in the basket and is carried in suspension in the air which is passed through the discharge opening 48.. In order to separate the lint from the air, a lint trap generally indicated at I is supported by the rear wall II of the casing and over the discharge opening 48 therein. While any suitable lint trap may be employedJ prefer to show one of the type disclosed and claimed in my C opending application, Serial N o.'194,8 43 filed December 3l, 1941, andassigned to the assignee of the present application. For the sake of appearance and because of space limitations,v the lint trap structure 5I is made relatively narrow and is carried in an inconspicuous place on the rear wall of the drier.
The lint trap 5I includes a shallow pan 52 which is flanged as shown at 53. The upper portion of the pan 52, as best shown in Figs. 3 and 4, or the portion directly opposite the opening 48 is imperforate. The lower portion of the pan 52 is provided with a relatively large air discharge opening 54 which is provided with a screen 55 for the separation of lint from the air passed through the opening 54. The lint trap 5I is positioned on the rear wall II of the vcasing by a pair of guides 55 under which the flanges 53 are disposed. In order to provide a substantially airtight connection between the lint trap .5l and thecasing wall II, the latter is provided with a flange 51 substantially coextensive with the nange 53 and engageable there by in the operating position of the trap 5I. The flange 51 is formed on a frame 58 which is welded or otherwise secured to the rear wall II of the casing. A handle 59 is provided for lifting the lint trap 5I when it is to be removed for cleaning. In this connection, the lint trap 5I is lifted until the ange 53 is clear of the guides` 5 6 after which the lint trap 5I is free and may be readily removed and cleaned, it being'n'oted that one entire side of the lint trap structure is open in order to provide access to all interior surfaces of the lint trap.
During operation of the drier, lint suspended in the air passing through the screen 55 is collected thereon. It is desirable that this lint be regularly removed from the trap and, in fact, it is desirable to remove this lint after each operation of the drier in order to insure that the OW of air from the drier will never become impeded. As set forth heretofore, many operators are negligent in cleaning the trap. In accordance with my invention, a signaling device is employed which will notify the operator at the end of each cycle of operation that the lint trap should be cleaned. Any well known f orm of signaling device may be employed and operated by the door I 8 of the drier when itis lowered to its open position for the removal of dried fabrics from the drier. Preferably, the lint trap itself is employed as a signaling device, the arrangement being such that the lint trap structure 5I is raised from its operating position, as shown in Fig. 3, to a signaling or notifying position, as shown in Fig. 5,
when the door I8 is open. A legend 6I may be printed or stamped on the inner surface of the lint trap pan 52 for notifying the operator that the trap should be cleaned.
As shown in Figs. l to 3, inclusive., the pan 52 of the trap is biased upwardly to the position thereof shown in Fig. 5 by a leaf spring 62 riveted or otherwise secured to the rear wall II of the casing. The pan 52 is retained in its operating position by a latch structure generally indicated at 63, as best shown in Fig. 6. This latch structure 63 includes a resilient spring latch 54 which is secured to the pan 52 by bolts 65. The latch 64 has an opening 66 formed therein for receiving catches 61, the latter being formed on a plate 68 which is positioned on the rear wall II of the casing. As shown, the plate 68 is secured to the frame 58 by a stud 59 extending through openings in the plate 68 and frame 58 and having a spun-over end, as shown at 1I.
The release of the latch 54 from the catch 61 is effected by a wire 12 which extends through an opening formed in the stud B9. As best shown in Figs. 1 and 2, the wire 12 extends forwardly of the front wall portion I3 of the casing.Y The lower end of the vwire extends through an opening 13 in one of the door brackets I9 and the end of the wire is bent to prevent its dislodgement from the vopening 13, as shown at 14. The upper portion of the wire 12 is positioned by a pair` of fingers 15 formed on the inner side of the front wall portion I3, between which the wire is disposed. It will be understood that the wire12 is relatively stiff and, preferably, formed of spring steel. l
` When the drier is in operation for the `drying of fabrics, the door I8 is closed or in the position shown in Figs. 1 and 2. The lint trap is also positioned as shown in these two figures as well as Figs. 3 and 4. At the conclusion of the drying operation, the door is swung through approximately 120 degrees to a horizontal position from the position shown in Fig. 2. Accordingly, that portion of the wire 12 which is adjacent the wall f portion I3 of the casing is swung upwardly between the positioning fingers 15. This movement of the wire forces the horizontal portion of the wire 12 rearwardly and into engagement with the latch 64'. Fig. 6 shows a portion of the wire 12 as the door is being moved downwardly and just prior to the releasing of the latch 64 from beneath the catches 61. When the door is moved to its horizontal position, the wire will have forced the latch out of engagement with the catch 61 and the spring 62 will then move the lint trap from the position shown, for example, in Fig. 3 upwardly to the position shown in Fig. 5. In the latter position, the upper end of the trap is raised to an exposed position above the top of the drier casing for notifying the operator that the trap should be cleaned.
In this notifying position, the trap I is still positioned by the guides 56. The operator may then lift the trap from the casing for cleaning. In assembling the lint trap 5I to the casing, the operator positions the trap behind the upper end of the guides 56 and then forces the trap structure downwardly. In doing so, the latch 64 rides over the inclined upper surfaces of the catches 61 and then snaps beneath the catches 61, the latter being received in the opening 66 in the latch. The arrangement is such that the trap is unlatched at about the time the door is moved to its horizontal position. Accordingly, the operator may partially open the door for the insertion of a fabric into the basket after the latter is in operation or for an inspection of the load in the basket without tripping the latch.
From the foregoing description, it will be apparent that I have provided an improved drier having provisions for notifying the operator that the lint trap requires attention, the notifying or signaling means being actuated in response to movement of the drier door to its full open position. The lint trap itself is preferably employed for this signaling operation and is actuated to a position wherein it is unlatched from the drier casing in carrying out the operation. Accordingly, the trap is readily removable for cleaning. The arrangement is such that the door may be partially opened for an inspection of the load at any time or for adding a garment or two to the drier after it has been started.
While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit thereof.
6 'what 1 claim-is: v r 1 1. In a drier for fabrics, the combination of a casing structure having a drying chamber formed therein and provided with an access opening in a wall thereof, a door carried by the casingfstructure and closing said access opening, said door being movable to an open-position, means for'4 conveying air to the drying chamber for# the abi-f' straction of water from fabrics contained therein, means deninga passage in the casing for the discharge "of airl and suspended lint from the drying chamber, a lint trap, means arranged on the exterior of the casing for supporting the lint trap and providing for movement thereof between an active position and a warning position, means for moving the lint trap to its warning position and means for energizing said trap moving means in response to movement of said door to its open position.
2. In a drier for fabrics, the combination of a casing structure having a drying chamber formed therein and provided with an access opening in a wall thereof, a door carried by the casing structure and closing said access opening, said door being movable to an open position, means for` conveying air to the drying chamber for the abstraction of water from fabrics contained therein, means dening a passage in the casing for the discharge of damp air and lint suspended therein from the drying chamber, a lint trap, means arranged on the exterior of the casing for supporting the lint trap and providing for movement thereof between an active and a warning position, means biasing the lint trap to its warning position, a latch for retaining the lint trap in its active position and means connecting said door and said latch for releasing the latch in response to movement of the door to its open position.
3. In a drier for fabrics, the combination of a casing structure having a drying chamber formed therein and provided with an access opening in a wall thereof, a door carried by the casing structure and closing said access opening, said door being movable to an open position, means for conveying air to the drying chamber for the abstraction of water from fabrics contained therein, means defining a passage in the casing for the discharge of damp air and lint suspended therein from the drying chamber, a lint trap, a pair of guides arranged on the casing for removably supporting said lint trap, said lint trap having means engaging the guides and providing for vertical movement of the trap on the guides, a spring biasing said lint trap upwardly from its operating position to a second position wherein at least a portion of the trap extends above the casing while supported by the guides, latching means for maintaining the trap in its operating position and means responsive to movement of the door to its open position for releasing the latching means.
4. In a drier for fabrics, the combination of a casing structure having a drying'chamber formed therein and provided with an access opening in a wall thereof, a door carried by the casing structure and closing said access opening, said door being movable to an open position, means for conveying air to the drying chamber for the abstraction of water from fabrics contained therein, means defining a passage in the casing for the discharge of damp air and lint suspended therein from the drying chamber, a foraminous trap structure covering said passage for separating lint from the air, means for movably supporting said trap on a side of the casing structure below the top thereof and providing for removal of the trap from the casing, a. spring biasing said `,trap structure to a position wherein it ,partially extends above the top 0f the saisine, a latch for retaining the trap structure in its operating po;- sition and s Iwits disposed within the .casing and connecting said door and laten, said wire acme otipg the latch for the release of the trep str1iture ir; response to movement of the door to its 09@ PQS-OXL EDGAR L- References ,cited in the me of this ,patent UNITED STATES PATENTS 10 Number N'a-'me Date Watkins 1 oct. 12, 1920 Adland et al May 11, i933 Waream Mar. 1;, 192,4 Dewey Mar. 25, 1924 FOREIGN PATENTS Country Date* K I Great Britain V Jan. 26,1933