US1711602A - Brake - Google Patents

Brake Download PDF

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Publication number
US1711602A
US1711602A US79191A US7919126A US1711602A US 1711602 A US1711602 A US 1711602A US 79191 A US79191 A US 79191A US 7919126 A US7919126 A US 7919126A US 1711602 A US1711602 A US 1711602A
Authority
US
United States
Prior art keywords
brake
disc
shoe
shoes
axle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US79191A
Other languages
English (en)
Inventor
Eduard G L Kindler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bergische Stahl Industrie
Original Assignee
Bergische Stahl Industrie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DEK95751D external-priority patent/DE440592C/de
Application filed by Bergische Stahl Industrie filed Critical Bergische Stahl Industrie
Application granted granted Critical
Publication of US1711602A publication Critical patent/US1711602A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B26D7/32—Means for performing other operations combined with cutting for conveying or stacking cut product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H5/00—Applications or arrangements of brakes with substantially radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/2245—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc brakes
    • F16D65/128—Discs; Drums for disc brakes characterised by means for cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D69/0408—Attachment of linings specially adapted for plane linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/04—Attachment of linings
    • F16D2069/0425—Attachment methods or devices
    • F16D2069/0433—Connecting elements not integral with the braking member, e.g. bolts, rivets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
    • F16D2125/24—Rack-and-pinion

Definitions

  • This invention relates to friction-brakes for railroad cars or other vehicles travelling on rails and consists essentially therein that the brake-shoes are applied to a brake-disc which is mounted in radial direction upon an axle of the vehicle, and that a layer of yielding material, such as Ferodo-fiber, wood or the like, is inserted between said brake-shoe and said brake-disc, said layer serving as the .element of the brake which is exposed to wear.
  • the brake in the present case will act in axial direction upon said brake disc.
  • the yielding layer is preferably mounted upon the brake-shoe by having a plate or disc of sheetmetal interposed, to which said yielding layer is fastened by means of rivets or the like.
  • the rivets serving for fastening the yielding layer upon said plate or disc of sheetmetal, are preferably made of copper and arranged counter-sunk, and with heads of conical conformation.
  • the brake-disc which is mounted in radial direction upon the axle, is preferably polished at its surface which cooperates with the yielding layer of Ferodo-fiber or the like. A rough braking surface of the brake-disc has been found to cause an excessive wear of the layer which serves as the brake-shoe or brake-block proper.
  • this brake-disc is preferabl constructed as a double disc, the means or fastening said double disc upon the axle being then preferably provided between the two individual discs of which the double brakedisc is composed. If such a double brakedisc is used, preferably both outer surfaces of the disc are smoothly polished. It is further desirable that the lever mechanism of the brake, which is used for transmitting the forces from the actuating handle for the brake to the braking organs, is positioned in proximity to the latter.
  • lever mechanism will consist of two double levers of the form of bell-cranks, each comprising a shorter arm connected with the brakeshoe and a longer arm connected with the operating mechanism of the brake, whereby 79,191, and in Germany November 28, 1925.
  • the lever mechanism is preferably mounted upon a support, which is suspended from the frame of the car.
  • the ends of the longer arms of the bell-cranks areconnected with each other by a string or chain which is carried over a roller, the latter being connected with the operating mechanism of the brake.
  • the brake-shoes which are operated by the shorter arms of the bell-cranks, are preferably loosely mounted upon the latter and are pressed away from the brake-disc by means of springs, which are mounted within a casing and laid around a pressure pin for the brake-shoes.
  • the drawing represents an example of the brake constructed according to this invention.
  • Figs. 2 and 3 a top-view and front view respectively, taken on Fig. 1,
  • Fig. l a diagrammatic view representing the general arrangement of the brake and Fig. 5 a section representing in approximately natural size the mode of fastening the layer, which serves as the brake-member proper, on the brake-shoe,
  • Fig. 6 shows a section of a part of the brake on a large scale.
  • the reference letter a des-' lgnates two discs, which are connected with each other by the Walls or webs a.
  • the former are made of two' halves, which are connected with each other by means of the screw-bolts b in such a-manner, that said screw*bolts will be positioned between the two discs a.
  • the discs a are smoothly polished on their exterior surfaces.
  • the several parts of the discs a. are constructed and connected with each other in such a manner that there will be no axial motion of the one disc relatively to the other.
  • the layer 0 serving as the braking member proper is made of a material ofgreat resistance to wear and more yielding than metal, such as Ferodo-fiber, wood or the like, and is fixed upon the plate or disc 0 of sheet-metal by means of counter-sunk rivets 0 as shown in Fig. 5, while the plate or disc 0 is fixed to the brakeshoe 0 by means of the screw-bolts 0
  • the brake-shoe pin 0 is surrounded by a helical spring a, as shown in Fig. 2-
  • the threaded pin 0" serves for adjusting the effective length of the brake-shoe pin a. l he bell-cranks d 25 double lever.
  • rollers 0 at positioned near the point of rotation of said The rollers i are connected with each other by a flexible string a or the like, rollers 0 in of the drawing.
  • the support 7 which serves as a bearing for the brake-shoes 0* and the. bell-cranks d is mounted by means of the arms q in suspended condition on the bottom or underframe of the car, as may especially be seen from Fig. 3.
  • a bar '7' is connected to the under frame of the car and serves as an abutment for the support, thus preventing the support andbrakev shoes from swinging away from the disc.
  • I claim 1 In a friction brake for rail vehicles, a device, a brake disc radially mounted on a rotatable axle of the vehicle, a I brake shoe opposite each lateral surface of the said disc and arranged to move subsltalripoints, which are which is carried over and between saidin a plane perpendicular to the said surface,
  • a brake operating device a brake disc radially mounted on a rotatable axle of the vehicle, a brake shoe opposite each lateral surface of the said cam disc and arranged to move substantially in the direction of said axle, a bellcrank lever for each shoe arran god to swing in a plane perpendicular to the said surface, one arm of each lever acting on a brake shoe, the other arm being connected with the said brake operating device, the levers actuating the brake shoes only in their engaging direction, the arms of the lovers which are in connection with the said brake operating device being longer than the other arms and crossing each other.
  • a brake disc mounted radially. on a rotatable axle of the vehicle, a brake shoe opposite each lateral surface of the said disc and arranged to move substantially in the direction of the said axle, two levers each' adapted toact on a brake shoe, means for moving the said levers, the free ends of the said levers being arranged to be engaged by said means, and a device for compensating uneven wear of both of said brake shoes and for effecting an equal distribution of the braking forces to the said levers.
  • brake disc mounted radially on a rotable axle of the vehicle, a brake shoe opposite each lateral surface of the said disc and arranged to move substantially in the direction of the said axle, two leverseach adapted to act on a brake shoe, means for moving the said levers,
  • a brake shoe opposite each lateral surface of the said disc and arranged to move substantially in the direction of said axle, a
  • bell-crank lever for each shoe arranged to swing in a plane perpendicular to the said surface, one arm of each lever acting on a brake shoe, the other arm being connected with the said brake operating device, the levers actuating the brake shoes only in their engaging direction, means for guiding each brake shoe, and a member connecting the guiding means of the brake shoes.
  • a brake operating device a brake disc radially mounted on a rotatable axle of the vehicle, a brake shoe opposite each lateral surface of the said disc and arranged to move substantially in the direction of said] axle, a bell-crank lever for each shoe arranged to swing in a plane perpendicular to the said surface, one arm of each lever acting on a brake shoe, the other arm being connected with the said brake operating device, the lovers actuating the brake shoes only in their engaging direction, means for guiding each brake shoe, and a member for connecting the guiding means of the two brake shoes, the pivots of said levers being arranged on the said member and near the guiding means of the respective brake shoes.
  • a friction brake for rail vehicles com prising a brake disc mounted rotatably but not slidably on a rotatable axle of the vehicle, two brake shoes each arranged to be moved substantially in the direction of said axle against one of the lateral surfaces of the said disc, and means moved in the same direction as'the brake shoes and to take with it the brake shoes only in one direction of movement, a pin on each brake shoe adapted to be engaged by the said means.
  • a friction brake for rail vehicles comprising a brake disc mounted radially on a rotatable axle of the vehicle, two brake shoes each arranged to be moved substantially in the direction of said axle against one of the lateral surfaces of the said disc, and means for each shoe moved in the same direction as the brake shoes and to take with it the brake shoes only in one direction of movement, a spring for releasing each brake shoe from the said brake disc and tensioned by said means.
  • a friction brake for rail vehicles comprising a brake disc mounted radially on a rotatable axle of the vehicle, two brake shoes each arranged to be moved substantially in the direction of said axle against one of the lateral surfaces of the said disc, and means for each shoe moved in the same direction as the brake shoes and to take with it the brake shoes only in one direction of movement, a spring for releasing each brake shoe from the brake disc and tensioned by-said means, and a casing for guiding each brake shoe, the said spring being enclosed in said casing.
  • a friction brake for rail vehicles comprising a brake disc mount-ed radially on a rotatable axle of the vehicle, two brake shoes each arranged to be moved substantially in the direction of said axle against one of the lateral surfaces of the said disc, and means moved in the same direction as the brake shoes and to take with it the brake shoes only in one direction of movement, a pin on each the direction of said axle against one of the lateral'surfaces of the said disc, and means for each shoe moved in 'the same direction as the brake shoes and to take with it the brake shoes only in one direction of movement, and a layer of yielding material interposed between each brake shoe and said brake disc.
  • a friction brake for rail vehicles comprising a brake disc mounted radially on a rotatable axle of the vehicle, two brake shoes each arranged to be moved substantially in the direction of said axle against one of the lateral surfaces of the said disc, and means for each shoe moved in the same direction as the brake shoes and to take with it the brake shoes only in one direction of movement, and a layer of yielding material mounted on each brake shoe.
  • a friction brake for rail vehicles comprising a brake disc mounted radially on a rotatableaxle of the vehicle, two brake shoes each arranged to be moved substantially in the direction of said axle against one of the lateral surfaces of the said disc, and means for each shoe moved in the same direction as the brake shoes and to take with it the brake shoes only in one direction of movement, a layer of yielding material mounted on each brake shoe, and the surface of said disc co operating with said brake shoes being polished before use; 16.
  • a friction brake for rail vehicles comprisin a brake disc mounted radially on a rotata le axle of the vehicle, two brake shoes each arranged to be moved substantially in the direction of said axle against one of the lateral surfaces of the said disc, and means moved in the same direction as the brake shoes and to take with it the brake shoes only in one direction of movement, ala er of ielding material on the braking su ace 0 each brake shoe, the disc comprising two disc shaped bodiesspaced apart and means within the space between the inner surface of the said bodies for bracing the latter against each other.
  • a brake operating device a brake disc radially mounted on a'rotatable axle of the vehicle, a brake shoe opposite each lateral surface of the said disc and arranged to move substantially in the direction of said axle, a bell-crank lever for each shoe arranged to swing in a plane perpendicular to the said surface, one arm of each lever acting ona brake shoe, the other arm being connected with the said brake operating device, the levers actuating the brake shoes only in their engaging direction, a layer of yielding ma terial on the braking surface of each brake shoe, the disc being composed of two bodies each comprising two semi-circular plates spaced apart, means between the inner surfaces of the said plates for bracing the discs against each other and other means within the said space for fastening the said bodies together to form a compact member of discwheel form.
  • a friction brake for rail vehicles comprising two brake surfaces fastened radially and not slidably on a rotatable axle of the vehicle, two brake shoes, each opposite one of said brake surfaces and arranged to'berection of movement,
  • a friction brake for railway vehicles comprising a brake disc mounted radially on a rotatable axle of the vehicle, a brake shoe arranged opposite each lateral surface of said disc, .each shoe arranged to be moved substantially in the direction of said axle against the disc, and means for each shoe moved in the same direction as the shoes to take its shoe with it only in one direct-ion.
  • a friction brake according to claim 19, wherein said means comprises a bell crank lever arranged to swing in a plane perpendicular to the friction face of a shoe,'and a brake operating device, one arm of said lever moving the shoe and the other arm connected with said device.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Braking Arrangements (AREA)
US79191A 1925-09-09 1926-01-04 Brake Expired - Lifetime US1711602A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEK95751D DE440592C (de) 1925-09-09 1925-09-09 Bremse fuer Schienenfahrzeuge
DE608000X 1925-11-28
DEB123923D DE450451C (de) 1925-09-09 1926-02-04 Bremse fuer Schienenwagen
DEB135612D DE537591C (de) 1925-09-09 1928-01-27 Bremse fuer Schienenfahrzeuge

Publications (1)

Publication Number Publication Date
US1711602A true US1711602A (en) 1929-05-07

Family

ID=27436158

Family Applications (3)

Application Number Title Priority Date Filing Date
US79191A Expired - Lifetime US1711602A (en) 1925-09-09 1926-01-04 Brake
US114751A Expired - Lifetime US1900282A (en) 1925-09-09 1926-06-09 Mechanical brake for railway motor cars
US335693A Expired - Lifetime US2011411A (en) 1925-09-09 1929-01-28 Brake for motor rail vehicles

Family Applications After (2)

Application Number Title Priority Date Filing Date
US114751A Expired - Lifetime US1900282A (en) 1925-09-09 1926-06-09 Mechanical brake for railway motor cars
US335693A Expired - Lifetime US2011411A (en) 1925-09-09 1929-01-28 Brake for motor rail vehicles

Country Status (4)

Country Link
US (3) US1711602A (enrdf_load_stackoverflow)
DE (2) DE450451C (enrdf_load_stackoverflow)
GB (1) GB265532A (enrdf_load_stackoverflow)
NL (1) NL20131C (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2627322A (en) * 1948-06-10 1953-02-03 American Steel Foundries Brake head arrangement
US2650680A (en) * 1949-05-18 1953-09-01 Budd Co Brake mechanism with removable shoes
US2843225A (en) * 1953-09-11 1958-07-15 Jeffrey Mfg Co Motor and brake mechanism
US2983337A (en) * 1956-12-05 1961-05-09 Dunlop Rubber Co Disc brakes
US3143191A (en) * 1961-05-12 1964-08-04 Budd Co Disk brakes for railway cars
US4019608A (en) * 1975-05-06 1977-04-26 Norman Allen Johnson Lever actuated caliper brake
US4428301A (en) 1981-08-03 1984-01-31 Lukens General Industries, Inc. Radial axle railway truck
US4858732A (en) * 1982-09-30 1989-08-22 Taylor Jr James L Brake shoe
US5131511A (en) * 1990-05-24 1992-07-21 Rockwell International Corporation Potential energy or weight-operated wheel brakes
CN107466345A (zh) * 2016-12-23 2017-12-12 强海胜 盘式双重制动机构与制动系统

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438482A (en) * 1942-06-08 1948-03-23 American Steel Foundries Railway disc brake arrangement
US2416820A (en) * 1944-11-25 1947-03-04 Budd Co Brake arrangement
DE952449C (de) * 1953-05-05 1956-11-15 Uerdingen Ag Waggonfabrik Untergestell fuer abbremsbare Kuebelwagen
US2757759A (en) * 1953-06-01 1956-08-07 Uni Mac Company Brake
DE968069C (de) * 1954-01-22 1958-01-16 Knorr Bremse Gmbh Scheibenbremse, insbesondere fuer Schienenfahrzeuge
US2878899A (en) * 1954-04-14 1959-03-24 Bassick Co Brake-equipped caster
DE1037217B (de) * 1955-08-20 1958-08-21 Teves Kg Alfred Druckmittelbetaetigte Scheibenreibungsbremse
US2957552A (en) * 1956-04-02 1960-10-25 Kelsey Hayes Co Disk brake
US2848072A (en) * 1956-05-15 1958-08-19 Budd Co Enclosed dual-disk brakes for vehicles
US2901059A (en) * 1957-05-16 1959-08-25 Budd Co Enclosed dual-disk brakes for vehicles
US3048240A (en) * 1959-07-24 1962-08-07 Amsted Ind Inc Handbrake linkage for rotor brake
DE1165643B (de) * 1960-07-30 1964-03-19 Bochumer Ver Fuer Gussstahlfab Schienenrad mit beiderseitigen parallelen Bremsflaechen
DE3307795A1 (de) * 1982-03-04 1983-09-22 William W. 04103 Portland Me. Montalvo III Doppeltwirkender reibungsmechanismus mit kraftverstaerkung fuer bremsen und kupplung
GB2183755A (en) * 1985-12-03 1987-06-10 Pikrose & Company Limited Friction braking apparatus for a railway vehicle
US20060231355A1 (en) * 2005-04-18 2006-10-19 Ming Zhang Railway wheel with integrated brake drum

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2627322A (en) * 1948-06-10 1953-02-03 American Steel Foundries Brake head arrangement
US2650680A (en) * 1949-05-18 1953-09-01 Budd Co Brake mechanism with removable shoes
US2843225A (en) * 1953-09-11 1958-07-15 Jeffrey Mfg Co Motor and brake mechanism
US2983337A (en) * 1956-12-05 1961-05-09 Dunlop Rubber Co Disc brakes
US3143191A (en) * 1961-05-12 1964-08-04 Budd Co Disk brakes for railway cars
US4019608A (en) * 1975-05-06 1977-04-26 Norman Allen Johnson Lever actuated caliper brake
US4428301A (en) 1981-08-03 1984-01-31 Lukens General Industries, Inc. Radial axle railway truck
US4858732A (en) * 1982-09-30 1989-08-22 Taylor Jr James L Brake shoe
US5131511A (en) * 1990-05-24 1992-07-21 Rockwell International Corporation Potential energy or weight-operated wheel brakes
CN107466345A (zh) * 2016-12-23 2017-12-12 强海胜 盘式双重制动机构与制动系统
CN107466345B (zh) * 2016-12-23 2019-02-19 河南省万安制动器有限公司 盘式双重制动机构与制动系统

Also Published As

Publication number Publication date
DE450451C (de) 1927-10-11
US2011411A (en) 1935-08-13
GB265532A (en) 1927-06-20
DE537591C (de) 1931-11-12
NL20131C (enrdf_load_stackoverflow)
US1900282A (en) 1933-03-07

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