US1151203A - Drying or roasting apparatus or the like. - Google Patents

Drying or roasting apparatus or the like. Download PDF

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Publication number
US1151203A
US1151203A US?5373414A US1151203DA US1151203A US 1151203 A US1151203 A US 1151203A US 1151203D A US1151203D A US 1151203DA US 1151203 A US1151203 A US 1151203A
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United States
Prior art keywords
drum
drying
roasting apparatus
heating elements
motor
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Expired - Lifetime
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US?5373414A
Inventor
Hjalmar Loefquist
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/022—Arrangements of drives, bearings, supports

Definitions

  • This invention relates to improvements in apparatus for drying moist cereals, roasting coffee and similar purposes.
  • the present invention is principaly distinguished by the feature that the drying or roasting takes place in a drum that is adapted to rotate continuously or to oscillate around a horizontal shaft and is provided at its periphery with longitudinal hollow webs in which electrical heating elements are placed.
  • the invention also comprises an automatic cut-out device for said heating elements, which acts as soon as the drum is stopped, for the purpose of preventing a burning of the material therein.
  • Figure 1 is a central vertical longitudinal section of the apparatus
  • Fig. 2 is a central cross section
  • Fig. 3 shows a diagram of the electrical connections of the apparatus.
  • a drum 3 rests by means of journals 4 which preferably should be hollow, so that air can be blown or drawn through the drum by means of a fan 5.
  • journals 4 which preferably should be hollow, so that air can be blown or drawn through the drum by means of a fan 5.
  • a number of hollow webs 6, in the form shown six are employed, consisting of angularly bent plates and containing electric heating elements, such as resistance wires 7 wound on cores 8 of crosslike cross section.
  • the current is supplied to these elements by means of a pair of contact rings 9 arranged on one end wall of the drum, brushes 10 bearing against said rings.
  • a reciprocatory tuming movement is given to the drum by means of a mechanism of a known kind.
  • the drum may, however, be
  • the manner of operation of the drum will be understood without further description.
  • the roasted or dried material is most easily discharged by turning the drum into such a position, that an opening normally closed by a sliding doorll is turned downward, then by opening the sliding door 11 the material falls down through a hopper 12.
  • Fig. 3 shows how the electrical parts of the apparatus are connected for preventing the current from remaining on the heating elements, if the motor should stop, which might cause the burning of the material.
  • 14 is the armature, 22 the magnet winding and 15 the starting resistance of the motor.
  • 16 are the heating elements which are connected in parallel with the motor to the mains 17.
  • the two electromagnets 20, 21 of said cut-outs are connected in series with each other, with the starting resistance and with the magnet winding 22.
  • a drum rotatable around a horizontal axis and having a single wall, longitudinal hollow webs on the inner side of the peripheral wall of said drum and projecting therefrom so as to serve as agitators for the material contained in said drum, electric resistance elements contained in said webs and means for rotating said drum.
  • a drum rotatable around a horizontal axis and having a single wall, longitudinal h0l low webs on the inner side of the peripheral wall of said drum, electric resistance heating elements contained in said webs, an electric motor in driven, connection to said drum, a starting controller for said motor, name to this specification in the presence of aild a mjnimluli out out for said resiitanfie two subscribing witnesses.
  • eements inc-11 ing an operating coi, t e operating coil of said out out being oonnect- F HJALMAR LOFQUIST' 5 ed in series with the starting controller of witnesseses:

Description

H. Lb'F uisT. 'DRYING 0R ROASTING APPARATUS OR THE LIKE.
, APPLICATION FILED JULY 28,1914- 1,151,203..
Patented Aug. 24, 1915.
2 SHEETS-SHEET I.
H. LUFQUIST.
DRYING 0R ROASTING APPARATUS OR THE LIKE.
APPLICATION 'FILED JULY 28,1914.
1,151,203. Q Q Patented Aug. 24, 1915.
2 SHEETS-SHEET 2.
HJ'AIMAR LfiFQU'IST, 0F STOCKHOLM, SWEDEN.
DRYING- OR ROASTING APPARATUS OR THE LIKE.
Specification of Letters Patent.
Patented Aug. 24, 1915.
Application filed July 28, 1914. Serial No. 853,734.
To all whom it may concern:
Be it known that I, HJALMAR Lor UIsT, a subject of the King of Sweden, residing at 21 Birger Jarlsgntin, Stockholm, Sweden, have invented new and useful Improvements in Drying or Roasting Apparatus or the like, of which the following is a specification.
This invention relates to improvements in apparatus for drying moist cereals, roasting coffee and similar purposes.
The present invention is principaly distinguished by the feature that the drying or roasting takes place in a drum that is adapted to rotate continuously or to oscillate around a horizontal shaft and is provided at its periphery with longitudinal hollow webs in which electrical heating elements are placed.
The invention also comprises an automatic cut-out device for said heating elements, which acts as soon as the drum is stopped, for the purpose of preventing a burning of the material therein.
A preferred form of the invention is illustrated in the accompanying drawings in which:
Figure 1 is a central vertical longitudinal section of the apparatus, Fig. 2 is a central cross section and Fig. 3 shows a diagram of the electrical connections of the apparatus.
In bearings 1 in a frame 2 a drum 3 rests by means of journals 4 which preferably should be hollow, so that air can be blown or drawn through the drum by means of a fan 5. Over the periphery of the drum there is distributed a number of hollow webs 6, in the form shown six are employed, consisting of angularly bent plates and containing electric heating elements, such as resistance wires 7 wound on cores 8 of crosslike cross section. The current is supplied to these elements by means of a pair of contact rings 9 arranged on one end wall of the drum, brushes 10 bearing against said rings.
In the form shown, a reciprocatory tuming movement is given to the drum by means of a mechanism of a known kind. As before mentioned, the drum may, however, be
continuously rotated in the same direction if desired.
The manner of operation of the drum will be understood without further description. The roasted or dried material is most easily discharged by turning the drum into such a position, that an opening normally closed by a sliding doorll is turned downward, then by opening the sliding door 11 the material falls down through a hopper 12.
Fig. 3 shows how the electrical parts of the apparatus are connected for preventing the current from remaining on the heating elements, if the motor should stop, which might cause the burning of the material. 14 is the armature, 22 the magnet winding and 15 the starting resistance of the motor. 16 are the heating elements which are connected in parallel with the motor to the mains 17. In the circuit of the motor as well in that of the heating elements there is inserted a minimum current cut-out 18, 19 respectively, the two electromagnets 20, 21 of said cut-outs are connected in series with each other, with the starting resistance and with the magnet winding 22. Thus if the starting device of the motor should return to cut-out position (as shown in Fig. 3) both electromagnets 20, 21 will be without current so that the heating elements will also be cut out.
Having now particularly described the nature of my invention and the manner of its operation, what I claim is:
1. In drying or roasting apparatus, a drum rotatable around a horizontal axis and having a single wall, longitudinal hollow webs on the inner side of the peripheral wall of said drum and projecting therefrom so as to serve as agitators for the material contained in said drum, electric resistance elements contained in said webs and means for rotating said drum.
2. In drying or roasting apparatus, a drum rotatable around a horizontal axis and having a single wall, longitudinal h0l low webs on the inner side of the peripheral wall of said drum, electric resistance heating elements contained in said webs, an electric motor in driven, connection to said drum, a starting controller for said motor, name to this specification in the presence of aild a mjnimluli out out for said resiitanfie two subscribing witnesses. eements inc-11 ing an operating coi, t e operating coil of said out out being oonnect- F HJALMAR LOFQUIST' 5 ed in series with the starting controller of Witnesses:
the motor. BmGnR NORDFELT,
In testimony whereof I have signed my 1 GICTA PRIEN.
US?5373414A Drying or roasting apparatus or the like. Expired - Lifetime US1151203A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438995A (en) * 1943-09-02 1948-04-06 Elbridge W Forney Drying machine of the air circulating, rotary drum, and enclosing casing type
US2700094A (en) * 1951-02-06 1955-01-18 William S Cloud Heating drum
US2897602A (en) * 1958-04-18 1959-08-04 John K Hines Portable grain dryer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438995A (en) * 1943-09-02 1948-04-06 Elbridge W Forney Drying machine of the air circulating, rotary drum, and enclosing casing type
US2700094A (en) * 1951-02-06 1955-01-18 William S Cloud Heating drum
US2897602A (en) * 1958-04-18 1959-08-04 John K Hines Portable grain dryer

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