US3771478A - Sewing machine cooling system - Google Patents

Sewing machine cooling system Download PDF

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Publication number
US3771478A
US3771478A US00267134A US3771478DA US3771478A US 3771478 A US3771478 A US 3771478A US 00267134 A US00267134 A US 00267134A US 3771478D A US3771478D A US 3771478DA US 3771478 A US3771478 A US 3771478A
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United States
Prior art keywords
machine
chamber
cover plate
fins
sewing machine
Prior art date
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Expired - Lifetime
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US00267134A
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English (en)
Inventor
M Tranquilla
G Kraatz
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Union Special Corp
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Union Special Corp
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Publication of US3771478A publication Critical patent/US3771478A/en
Assigned to BT COMMERCIAL CORPORATION reassignment BT COMMERCIAL CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: UNION SPECIAL CORPORATION
Assigned to UNION SPECIAL CORPORATION reassignment UNION SPECIAL CORPORATION RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BT COMMERCIAL CORPORATION
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B71/00—Lubricating or cooling devices

Definitions

  • a sewing machine is provided with a ducted fan mounted on the machine drive shaft.
  • the fan provides a substantially axial flow. Air discharged from the fan is directed over the bottom cover plate of the sewing machine which is provided with heat dissipating fins. Additionally, air discharged from the fan is directed over the top of the machine.
  • Field to Which the Invention Pertains This invention pertains to sewing machines and particularly to a cooling system for a sewing machine.
  • Sewing machines particularly industrial sewing machines, often operate at extremely high speeds, e.g., industrial sewing machines are available which run at speeds as high as 8,000 rpm. Since such machines employ numerous mechanical parts which are in moving contact, sophisticated lubrication systems are necessitated. Notwithstanding the sophistication of these lubrication systems, a substantial amount of heat is generated when the various mechanical parts of the sewing machine operate at such high speeds. Generally, such frictionally generated heat is manifested by an increase in both the temperature of the oil and the temperature of the various mechanical parts and frame which comprise the machine. For a number of reasons, it is important that some of this heat is dissipated.
  • the lubricating oil may suffer a thermal degradation with the result that the required lubrication will not be provided.
  • the temperature of the exterior members of the sewing machine must be limited in order to insure both the safety and comfort of the operator.
  • a novel cooling system for dissipating such frictionally generated heat is the field to which this invention pertains.
  • Prior Art has recognized the need for providing a cooling system for a sewing machine and particularly the need for providing a cooling system in conjunction with high speed, industrial sewing machines.
  • various sewing machine constructions and apparatus arrangements have heretofore been proposed for providing a cooling or heat dissipating effect.
  • Exemplary of such prior art constructions are the cooling systems shown in US. Pat. Nos. 3,638,594; 2,678,013; 2,744,482; 3,081,723; 2,222,016; 3,009,430 and 2,711,146.
  • a common expedient disclosed in some of the aforementioned patents are used by the prior art to dissipate heat generated in a sewing machine comprises the use of heat dissipating fins exteriorally mounted on a sewing machine, for example on the base thereof.
  • Another approach employed by the prior art to provide heat dissipating effects resides in the utilization of a fan for creating air flows within or around the sewing machine.
  • the lubricating oil within the machine and the external frame members are heated to undesirably high temperatures notwithstanding the use of prior art cooling systems.
  • the cooling system disclosed herein it has been found that the temperature of the lubricating oil and the temperature of the external members of the machine may be significantly reduced.
  • a second chamber adjacent to the machine chamber at one end of the machine.
  • the machine drive shaft extends through both the machine chamber and the second chamber and is provided with means adapted for external drive, e.g., a pulley mounted on the end of the drive shaft exteriorally of the machine.
  • a ducted fan mounted on the drive shaft in the second chamber.
  • the second chamber is provided with an air inlet port and two discharge ports, one at the top of the second chamber and one at the bottom of the second chamber. Air which is axially discharged from the fan is directed downwardly, by louvers, to the bottom discharge port. Located at the bottom discharge port is a horizontally disposed louver which redirects the downwardly flowing air to a horizontal path. Air discharged from the second louver flows along and between heat dissipating fins which are mounted on the bottom cover plate of the machine and disposed longitudinally thereof.
  • Air from the ducted fan may also be directed along and over the top of the machine.
  • air flow over the top of the machine is achieved by providing a slot in the top of the duct associated with the ducted fan. A portion of the air handled by the fan is discharged through the aforementioned slot which is located adjacent to the top discharge port in the second chamber.
  • a top cover is provided in the preferred embodiment which defines a sealed chamber with respect to the top of the machine. The top cover is provided with slots, preferably at the rear thereof, through which air may be discharged.
  • means are provided adjacent to the bottom of the heat dissipating fins for maintaining the air flow between the fins.
  • FIG. 1 is a front view, partially in section, of a sewing machine and showing a preferred embodiment of the invention.
  • FIG. 2 is a side view, partially in section, taken along the section line 22 of FIG. 1.
  • FIG. 3 is a side view, partially in section, taken along the section line 3-3 of FIG. 1.
  • FIG. 4 is a fragmentary, bottom view of the sewing machine shown in FIG. 1.
  • FIG. 5 is a view in perspective of certain parts of the sewing machine shown in FIG. 1, said parts being shown in spaced, disassembled arrangement.
  • FIG. 1 there is shown a sewing machine of the over-edge type.
  • the machine includes an upstanding frame 10 which defines a machine chamber 9 and a second chamber 21.
  • Bolted to the upstanding frame 10 is an upper frame 11.
  • the machine chamber 9 is sealed at the top by a top oil cover plate 13 appropriately bolted to the upper frame 11.
  • Mounted on the upper frame 11 is an operating head 12.
  • Affixed to the lower portion of the frame 10 is an operating table 12a.
  • the machine chamber 9 is sealed at the bottom by a bottom cover plate 15.
  • a drive shaft 19 is mounted on the frame longitudinally thereof and is appropriately journaled for rotation.
  • the drive shaft 19 extends through the machine chamber 9 and the second chamber 21 and extends beyond the frame 10, at the right side thereof, where it is adapted for external drive, i.e., the drive shaft 19 is provided with a pulley 20.
  • a reservoir of lubricating oil 60 (shown in FIG. 1) is provided for lubricating the mechanical parts which provide the operative connection between the drive shaft 19 and the operating head 12.
  • various means are provided, and are well known to those skilled in the art, to cause oil from the reservoir to be deposited upon the various mechanical parts mounted within the machine chamber 9.
  • the environment defined by the machine chamber 9 will be heated and the oil which drips off the moving parts will be deposited at the bottom of the machine chamber 9.
  • a fan 24 is provided and is constructed so as to provide a substantially axial flow. Additionally, it will be observed that fan 24 is a ducted fan, i.e., referring to FIG. 3, a duct peripherally surrounds the fan 24. Referring to FIGS. 1 and 5, it will be seen that the duct which peripherally surrounds the fan 24 is comprised of a top duct 26 and a bottom duct 27.
  • the top duct includes an inverted L shaped plate 31 provided with screw receiving slots 23 on the horizontal surface thereof.
  • the entire upper duct assembly 25a is maintained in position within the chamber 21 by affixation to the frame 10, for example by the use of bolts 33 as shown in FIG. 1.
  • the plate 28 includes a plurality of downwardly facing louvers 29.
  • the plate 29 is affixed to the plate 31, for example by welding.
  • the lower duct 27 Similar to the construction of the upper duct assembly 25a the lower duct 27 includes an L-shaped plate 37 provided with bolt receiving slots 22. In this manner, the lower duct assembly 25b may be secured within the second chamber 21 (as shown in FIGS. 1 and 2) by screws 38.
  • the plate 34 includes a plurality of downwardly facing louvers 35. Plate 34 is fixedly mounted on the plate 37, for example by welding. For added strength, support pins and 36 may be provided for louvers 29, 35, respectively.
  • terminal edges 30b of the bottom duct 27 are crimped for engagement with the terminal edges 30a of the upper duct 25a.
  • louver 42 which is affixed by screws 41 to plate 39, plate 39 being affixed to the frame 10 by screws 40.
  • the louver 42 terminates adjacent to the transverse edges of the longitudinally disposed fins 16.
  • top cover plate 14 is mounted on the frame 10 and together with the top oil cover plate 13 provides a substantially sealed chamber 61. It will be noted that the substantially sealed chamber 61.is in fluid communication with the second chamber 21 via the top discharge port 43. Additionally, it will be noted that the top cover plate 14 is provided with a plurality of slots 45 at the rear thereof.
  • a slot 32 is provided in the top portion of the upper duct 26 and. is located (FIG. 1) adjacent to the top discharge port 43.
  • a belt is disposed about the pulley 20 and connected to an electric motor which supplies the necessary power to rotate the drive shaft 19.
  • Rotation of the main drive shaft 19 rotates the fan 24 which inducts air into the second chamber 21 through the intake port 46.
  • the preponderance of the air conducted into he chamber 21 is axially discharged and thus directed against the downwardly facing louver 29, 35.
  • the air axially discharged from the fan 24 is directed downwardly through the left hand side of the second chamber 21 towards the bottom discharge port 59, where it encounters the horizontally disposed louver 42 and is thus redirected into a horizontal flow between the longitudinally disposed fins 16.
  • the fan 24 provides a substantially axial flow, a radial flow component is nevertheless imparted to some of the air which is handled by the fan 24.
  • a radial pressure head is developed which causes air to flow through the slot 32 and then through the adjacently disposed top discharge port 43.
  • an air flow is maintained into the substantially sealed chamber 61. Air flowing into this substantially sealed chamber 61 passes over the top oil cover plate 13 and is ultimately discharged through the slots 45 in the rear 44 of the top cover plate 14.
  • the distance between the bottom of the fins 16 and the mounting surface should not be greater than approximately one-eighth of an inch and should preferably be approximately onesixteenth if the air flow between the fins is to be maintained.
  • the air directed from the fan to the fins is cool air which is heated as the air flows along and between the fins.
  • the air flow between the fins would appear to be Rayleigh line flow which is characterized by a continuous increase in velocity due to heat transferred to the air. As the air flows along and between the fins, it is heated and the air expands. Because of the expansion of the air, the velocity of the flowing air is increased.
  • a sewing machine which comprises:
  • an up-standing frame defining a machine chamber and a second chamber adjacent to said machine chamber at one end of said machine, said second chamber having an inlet port and at least one discharge port;
  • a top oil cover plate mounted on the top of said frame and sealing the top of said machine chamber
  • a drive shaft mounted on said frame longitudinally thereof, extending through said machine chamber and said second chamber and adapted for external drive;
  • a ducted fan mounted within said second chamber and on said drive shaft for rotation therewith;
  • said means for directing air over said top oil cover plate includes means for restricting the air flow over said top oil cover plate such that less air flows over said top oil cover plate than along said fins.
  • said air flow maintaining means comprises mounting means for maintaining the bottom of said fins adjacent to the surface on which said machine is mounted.
  • said means for directing air oversaid top oil cover plate includes a top cover plate mounted on said frame above said top oil cover plate, defining a channel therebetween which is in fluid communication with said second chamber, and on said drive shaft for rotation therewith; said top plate including at least one air discharge slot. j. means for directing air from said ducted fan,
  • a sewing machine which comprises: i. through said top port, and
  • said chamber at one end of said machine, said second means for discharging air from said fan through said chamber having an inlet port, a bottom discharge top port comprises a fan duct having a slot in the top port and a top discharge port; portion thereof adjacent said top discharge port.
  • a top oil cover plate mounted on the top of said comprises:
  • a drive shaft mounted on said frame longitudinally 14.
  • said air thereof, extending through said machine chamber flow maintaining means is a plate mounted on the botand said second chamber and adapted for external tom of said fins. drive;
  • said air h. means within said machine chamber for opera flow maintaining means comprises mounting means for tively connecting said drive shaft to said operating maintaining the bottom of said fins adjacent to the surhead; face on which said machine is mounted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)
US00267134A 1972-06-28 1972-06-28 Sewing machine cooling system Expired - Lifetime US3771478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26713472A 1972-06-28 1972-06-28

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US3771478A true US3771478A (en) 1973-11-13

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Application Number Title Priority Date Filing Date
US00267134A Expired - Lifetime US3771478A (en) 1972-06-28 1972-06-28 Sewing machine cooling system

Country Status (6)

Country Link
US (1) US3771478A (OSRAM)
JP (1) JPS5439787B2 (OSRAM)
DE (1) DE2331966A1 (OSRAM)
FR (1) FR2191566A5 (OSRAM)
GB (1) GB1431345A (OSRAM)
IT (1) IT986240B (OSRAM)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062310A (en) * 1975-08-02 1977-12-13 Union Special G.M.B.H. Cooling device for sewing machines
US4145985A (en) * 1977-02-03 1979-03-27 Pfaff Industriemaschinen Gmbh Sewing machine having a cooling air blower
US4154182A (en) * 1977-01-13 1979-05-15 Pfaff Industriemaschinen Gmbh Sewing machine with a cooling system
USRE30907E (en) * 1975-08-02 1982-04-20 Union Special G.M.B.H. Cooling device for sewing machines
US4348970A (en) * 1980-04-01 1982-09-14 Bliss & Laughlin Industries, Incorporated Self-oiling portable bag-closing sewing machine
USRE33382E (en) * 1980-04-01 1990-10-16 Axia Incorporated Self-oiling portable bag-closing sewing machine with pump
US5207167A (en) * 1990-04-25 1993-05-04 Juki Corporation Cooling and waste collection system for a sewing machine
US5454338A (en) * 1994-07-14 1995-10-03 Sara Lee Corporation Positive pressure lint barrier and oil cooler for a sewing machine
WO2004048669A1 (ja) * 2002-11-28 2004-06-10 Hotta, Kunio 植毛機
CN103526469A (zh) * 2013-09-09 2014-01-22 浙江沪龙电机有限公司 设有内散热装置的缝纫机机头结构
CN103603152A (zh) * 2013-11-14 2014-02-26 吴江市喜力机械厂 缝纫用散热节能装置
CN105020272A (zh) * 2015-08-25 2015-11-04 南车成都机车车辆有限公司 一种机车挡油罩及机车牵引电机油封系统阻油方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627015C3 (de) * 1976-06-16 1982-12-02 Union Special Gmbh, 7000 Stuttgart Kühleinrichtung für Nähmaschinen
DE2534568C3 (de) * 1975-08-02 1982-01-28 Union Special Gmbh, 7000 Stuttgart Kühleinrichtung für Nähmaschinen
JP2757903B2 (ja) * 1993-02-02 1998-05-25 株式会社ニコン ソフトフォーカスフィルタを備えたカメラ
CN109706651B (zh) * 2019-03-13 2021-01-26 杰克缝纫机股份有限公司 一种缝纫机的散热装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844743A (en) * 1928-11-20 1932-02-09 Union Special Machine Co Sewing machine ventilating system
US2144326A (en) * 1937-09-30 1939-01-17 John W Callaghan Fan attachment for machines
US3081723A (en) * 1960-11-25 1963-03-19 Singer Mfg Co Automatic lubrication for a feed-offthe-arm sewing machine
US3638594A (en) * 1970-03-10 1972-02-01 Merrow Machine Co Sewing machine cooling system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844743A (en) * 1928-11-20 1932-02-09 Union Special Machine Co Sewing machine ventilating system
US2144326A (en) * 1937-09-30 1939-01-17 John W Callaghan Fan attachment for machines
US3081723A (en) * 1960-11-25 1963-03-19 Singer Mfg Co Automatic lubrication for a feed-offthe-arm sewing machine
US3638594A (en) * 1970-03-10 1972-02-01 Merrow Machine Co Sewing machine cooling system

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062310A (en) * 1975-08-02 1977-12-13 Union Special G.M.B.H. Cooling device for sewing machines
USRE30907E (en) * 1975-08-02 1982-04-20 Union Special G.M.B.H. Cooling device for sewing machines
US4154182A (en) * 1977-01-13 1979-05-15 Pfaff Industriemaschinen Gmbh Sewing machine with a cooling system
US4145985A (en) * 1977-02-03 1979-03-27 Pfaff Industriemaschinen Gmbh Sewing machine having a cooling air blower
US4348970A (en) * 1980-04-01 1982-09-14 Bliss & Laughlin Industries, Incorporated Self-oiling portable bag-closing sewing machine
USRE33382E (en) * 1980-04-01 1990-10-16 Axia Incorporated Self-oiling portable bag-closing sewing machine with pump
US5207167A (en) * 1990-04-25 1993-05-04 Juki Corporation Cooling and waste collection system for a sewing machine
US5454338A (en) * 1994-07-14 1995-10-03 Sara Lee Corporation Positive pressure lint barrier and oil cooler for a sewing machine
US5546879A (en) * 1994-07-14 1996-08-20 Sara Lee Corporation Lint barrier for a sewing machine
WO2004048669A1 (ja) * 2002-11-28 2004-06-10 Hotta, Kunio 植毛機
US20050263054A1 (en) * 2002-11-28 2005-12-01 Sei Kato Flocking machine
CN103526469A (zh) * 2013-09-09 2014-01-22 浙江沪龙电机有限公司 设有内散热装置的缝纫机机头结构
CN103603152A (zh) * 2013-11-14 2014-02-26 吴江市喜力机械厂 缝纫用散热节能装置
CN103603152B (zh) * 2013-11-14 2015-05-06 吴江市喜力机械厂 缝纫用散热节能装置
CN105020272A (zh) * 2015-08-25 2015-11-04 南车成都机车车辆有限公司 一种机车挡油罩及机车牵引电机油封系统阻油方法

Also Published As

Publication number Publication date
JPS4951054A (OSRAM) 1974-05-17
DE2331966A1 (de) 1974-01-17
IT986240B (it) 1975-01-20
FR2191566A5 (OSRAM) 1974-02-01
JPS5439787B2 (OSRAM) 1979-11-29
GB1431345A (en) 1976-04-07

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Owner name: BT COMMERCIAL CORPORATION, STATELESS

Free format text: SECURITY INTEREST;ASSIGNOR:UNION SPECIAL CORPORATION;REEL/FRAME:004610/0215

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Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BT COMMERCIAL CORPORATION;REEL/FRAME:004754/0102

Effective date: 19870707