US3342963A - Thermally responsive member with longitudinally spaced contacts each actuated upon bending of the member in one direction - Google Patents

Thermally responsive member with longitudinally spaced contacts each actuated upon bending of the member in one direction Download PDF

Info

Publication number
US3342963A
US3342963A US437377A US43737765A US3342963A US 3342963 A US3342963 A US 3342963A US 437377 A US437377 A US 437377A US 43737765 A US43737765 A US 43737765A US 3342963 A US3342963 A US 3342963A
Authority
US
United States
Prior art keywords
contacts
strip
pair
contact
switch
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
US437377A
Other languages
English (en)
Inventor
Szymber Oleg
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.)
NEUENKIRCHENER EISENGIESSEREI und MASCHINENFABRIK EMIL KEMPER GmbH
GAF Chemicals Corp
Original Assignee
General Aniline and Film Corp
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
Application filed by General Aniline and Film Corp filed Critical General Aniline and Film Corp
Priority to US437377A priority Critical patent/US3342963A/en
Priority to GB8854/66A priority patent/GB1125407A/en
Priority to FR52157A priority patent/FR1475979A/fr
Priority to DE19661665569 priority patent/DE1665569A1/de
Priority to NL6602884A priority patent/NL6602884A/xx
Priority to BE677364D priority patent/BE677364A/xx
Priority to SE2859/66A priority patent/SE313869B/xx
Application granted granted Critical
Publication of US3342963A publication Critical patent/US3342963A/en
Anticipated expiration legal-status Critical
Assigned to DMW SCHWARZE GMBH TUREN & TORE reassignment DMW SCHWARZE GMBH TUREN & TORE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KEMPER, KATE
Assigned to NEUENKIRCHENER EISENGIESSEREI UND MASCHINENFABRIK EMIL KEMPER GMBH reassignment NEUENKIRCHENER EISENGIESSEREI UND MASCHINENFABRIK EMIL KEMPER GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DMW SCHWARZE GMBH TUREN & TORE
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/30—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action
    • H01H43/301—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material
    • H01H43/302—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies
    • H01H43/304—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to thermal action based on the expansion or contraction of a material of solid bodies of two bodies expanding or contracting in a different manner, e.g. bimetallic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/06—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
    • H01H61/08—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts wherein the make-to-break ratio is varied by hand setting or current strength

Definitions

  • the present invention relates to switches, and more particularly to a new and improved switch and circuit therefor for automatically recycling a load device, such as an electric motor.
  • slide projectors are usually provided with some form of slide changing device for moving a slide back Iand forth between a slide magazine and the slide projection gate of the projector.
  • slide changers are adapted to be manually controlled.
  • means are provided for automatically reciprocating or cycling the slide carrier at repeated intervals of time selected by the operator of the device.
  • the present invention provides a simple, inexpensive and effective means for bringing ⁇ about such an operation of a slide changing mechanism.
  • a primary object of the present invention is the provision of a new and improved recycling switch including a thermally responsive member associated -with iirst and second pairs of contacts, one pair of contacts being normally open and the other pair of contacts being normally close-d and associated with bi-stable means.
  • Another object of the present invention is the provision of a new and improved recycling switch including a bimetallic strip associated with a rrst pair of normally open contacts, a second pair of normally closed contacts, and bi-stable means, which strip has a spring value for snapping said second pair of contacts open.
  • LA further object of the present invention is the provision of a new and improved automatic Irecycling device including a bimetal switch, wherein the on time of the switch is independent of the total cycle time controlled by the switch.
  • Yet another object of the present invention is the provision of a new and improved automatic recycling device including means tor varying the total time of the u cycle of operation.
  • FIG. 1 is a top plan view of the recycling switch of this invention
  • FIG. Vla is a fragmentary plan view of the switch of FIG. l showing the normally closed contacts in their open position;
  • FIG. 2 is a section taken along line 2-2 of PIG. 1;
  • FIG. 3 is a fragmentary section taken along line 3 3 of FIG. 1;
  • FIG. 4 is a diagrammatic view of the recycling switch and circuit of this invention.
  • the switch of this invention includes a generally rectangular at base 10 made of suitable dielectric material.
  • Base 10 supports ⁇ a pin 12 .at right angles thereto, which pin pivotally mounts a generally U-shaped bracket 14.
  • a bimetallic strip 16 is 3,342,963 Patented Sept. 19, 1967 ICC secured intermediate the ends thereof to the bight portion of bracket14 by suitable means, such as a small rivet.
  • bimetallic strips used for switching are composed of two strips secured together in coextensive contact, which strips have different coefficients Vof expansion. Accordingly, when such a strip is heated it tends to warp or assume arcuate form due to the fact that one strip has a greater coefficient or expansion than the other.
  • bimetallic strip 16 upon being heated, warps or Iforms arcuate form so that the ends thereof move downwardly and inwardly as viewed in FIG. 1.
  • a suitable heater winding 18 is wound around strip 16 along the length thereof.
  • One end of winding 18 is connected to a lug bracket 19 formed of conductive material, which bracket is ⁇ secured to base 10.
  • the other end of winding -18 is secured to bimetal strip 16.
  • this end -of the heater winding is secured in an aperture in the bimetallic strip, which aperture mounts a contact Ztl.
  • a lug 22 is secured to base 10. This lug, which is of conductive material, mounts a contact 24. Contact 24 is adapted to be engaged by contact 20 upon heating of the bimetal strip as will be explained hereinbelow.
  • Strip 29, which is of conductive material, is suitably secured to base 10.
  • a -bi-stable or over-center member 30 Ialternately releasably holds contacts 26, 28 closed and opened as will be explained below.
  • This member is of -U-shaped configuration and has one end 30a thereof received within a cut-out portion or notch of yan ear 32.
  • This ear has an integral base 33 which is suitably secured to base 10 ⁇ of the switch.
  • the other end 30b of bi-stablemember 30 is pivotally engaged with the adjacent end of the bimetal strip. ln the embodiment of the invention illustrated, this end of the bimetal strip is shaped to form a point 16a (FIG. 2), which point is received within an aperture (not shown) in end 30b of member 30.
  • vBi-stable member 30 which is formed of suitable spring material, tends, in its position illustrated in FIG. 1, to open up or expand thereby to hold contacts 26, 28 together.
  • strip 16 when strip 16 is heated it acts to snap contacts 26, 28 open against the relatively weak closing force of member 30 until the latter strikes an upstanding stop 34 integral with base l33 (FIG. la).
  • member 30 When member 30 is in its FIG. 1a position, it acts to hold contacts 2,6, 28 separated in such a manner that contacts 26, 28 are permitted to close upon cooling of strip 16.
  • a spring strip 35 (FIGS. 1 and 3) has one end thereof secured between base 10 and lug strip 29. This spring strip is stepped upwardly as at 35a (FIG. 1,) and extends in parallel spaced relation with base 10.
  • a contact 36 is mounted to the underside of spring strip 35. When the spring strip 35 is depressed, contact 36 engages a contact 38 which is mounted on a strip 39. Strip 39 is suitably secured to base 10. Both spring strips 35 and 39 are made of suitable conductive material.
  • Bracket plate 40 is secured to base plate 10 at a right angle with the latter. Bracket plate 40 mounts suitable hub means 41 which journal a shaft 42. A cam member 44 is secured to shaft 42 for rotation with the latter.
  • cam member 44 has an axially extending recess 45 in the outer surface thereof.
  • recess 45 receives the up-turned end 35b of spring strip 35 thereby allowing the latter to assume a position wherein contacts 36 and 38 are separated.
  • cam member 44 is rotated E in a counterclockwise direction as indiacted in FIG. 3, the arcuate outer surface of cam member 44 engages end 35b of the spring strip and depresses the latter (to its broken line position shown in FIG. 3) for bringing about engagement of contacts 36 and 38.
  • cam member 44 is provided with a helical surface 47.
  • Bimetallic strip 16 has a right angle end portion 16a which engages helical surface 47 f the cam member.
  • Bimetallic strip 16 when not being heated, tends to assume a rectilinear configurations and thereby urges end 16a into engagement with helical surface 47. It should be apparent that rotation of cam member 44 in a clockwise direction causes contact 20 to move away from contacts 24 and that rotation of cam member 44 in a counterclockwise direction moves contact 20 toward contact 24. It will be understood that cam mem ber 44, more particularly helical surface 47 thereof, serves, among other things, as a means for setting or adjusting the spacing between contacts 20 and 24.
  • Cam member 44 includes an integral, arcuate flange portion 48, the ends of which flange portion are adapted to engage a protrusion 40a formed in plate 40. This protrusion acts as a stop to limit rotation of cam member 44.
  • t and 51 represent low voltage lines, 28 volts for example, used in a slide projector circuit.
  • This voltage is mentioned for purposes of illustration only and not for limiting the invention in any way as it will be appreciated that a switch constructed in accordance with the present invention can be operated by current having voltage other than the voltage mentioned.
  • a line 52 has one end thereof connected to line 50 at a junction 53; the other end of line 52 is connected to lug 19 of the switch.
  • a line 54 has one end thereof connected to line 51 at a junction 55; the other end of line 54 is connected with a junction 56.
  • a line 57 connects junction 56 with lug 39 of the switch.
  • a line 58 has one end thereof connected with a junction 59 and the other end thereof connected with a junction 60.
  • a line 61 connects junction 60 with lug 22 of the switch.
  • 62 represents an induction type electric motor.
  • This motor may be the driven motor of a slide changer forming a part of a slide projector.
  • Mechanically connected to 62 is an arm 64, which arm is rotatable about a pivot 65.
  • motor 62 drives arm 64 for rotation (in a clockwise direction as viewed in FIG. 4) about pivot 65.
  • Arm 64 may form part of the drive mechanism for the slide carrier.
  • spring arm 66 supports a contact 67.
  • a line 68 connects contact 67 with junction S6.
  • a stationary contact 69 is mounted adjacent contact 67 and a line 70 connects contact 69 with the junction 59.
  • Arm 64 When arm 64 is rotated and clears spring 66, the latter acts to close contacts 67 and 69. Arm 64 and spring 66 may be contructed as shown in the application of Karl F. Kurz, Ser. No. 188,107, led Apr. 17, 1962, now United States Patent 3,183,774.
  • bi-stable member 30 acts, in the position thereof illustrated in FIG. l, to prevent premature separation of contacts 26 and 28 which are in series circuit relation with heater winding 18. Premature separation of contacts 26, 28 would of course open the heater winding circuit before the strip could be heated for bringing contacts 20, 24 into engagement.
  • a circuit for motor 62 is closed. This circuit is as follows: lines 51, 54, 57, lug strip 39, contacts 38 and 36, strips 35, 29, contacts 28 and 26, bimetallic strip 16, contacts 20 and 24, lug bracket 22, line 61, motor 62, line 50.
  • arm 64 is connected with motor 62 for being driven by the latter. After motor 62 has been energized as just described, arm 64 is rotated in a clockwise direction as indicated in FIG. 4. As soon as the free end of arm 64 clears spring 66, the latter snaps contacts 67 and 69 into engagement with each other thereby to complete a circuit for motor 62 independently of the switch.
  • This circuit for motor 62 is as follows: lines 51, 54, 68, contacts 67, 69, lines 7G, 58, motor 62, and line 50.
  • arm 64 again returns to the position illustrated in FIG. 4 thereby opening contacts 67 and 69 for de-energizing motor 62 (contacts 20 and 24 opened before the motor cycle was completed but after contacts 67 and 69 closed).
  • the cycle of operation of the switch can be varied by changing the maximum spacing between contacts 20 and 24.
  • This spacing is controlled or changed by rotating cam member 44 as explained above.
  • shaft 42 which rotates with the cam member, is associated with suitable indicia means (not shown) so that shaft 42 can be rotated to various angular positions corresponding to designated periods of time, which periods of time represent the duration of the cycle of operation of the switch.
  • strip 16 is completely independent of the total cycle time as controlled by cam 44.
  • contacts 26, 28 always separate at the same length of time after contacts 20 and 24 engage each other.
  • strip 16 is constructed so that it has a spring value.
  • bi-stable member 30 is so termed because it is stable in two positions, viz. the position illustrated in FIG. l and the position illustrated in FIG. 1w. Actually, the member 30 acts as an overcenter member for alternately releasably holding contacts 26, 28 closed and opened.
  • a recycling switch comprising a base, a thermally responsive strip, support means engaging such strip at one portion along the length thereof and mounting the same on said base so that the remaining portion of the strip is free for warping upon being heated, a first pair of normally open contacts including one contact mounted on the base and the other contact mounted on the strip in spaced relation from said one portion for movement toward and away from said one contact upon heating and cooling of the strip, respectively, stop means on the base for arresting movement of said other contact away from said one contact, a second pair of normally closed contacts including one contact mounted on the base and the other contact mounted on the strip in spaced relation from said one portion and said one contact of said second pair of contacts for movement toward and away from the latter upon cooling and heating of the strip, respectively, bi-stable means connected with said strip adjacent said second pair of contacts for alternately releasably holding the latter open and closed, electric heating means disposed in thermal conductive juxtaposition to said strip in series with said second pair of contacts for heating said strip, said strip being mounted so that upon being heated it warps in a
  • said strip includes a bimetal member having a spring value for snapping said second pair of contacts open.
  • a recycling switch comprising, a base, a thermally responsive strip pivotally mounted on said base adjacent one portion of the former and adapted, upon being heated, to Warp in one direction for assuming arcuate form, a rst pair of normally open contacts including one contact mounted on the base and the other contact mounted on the strip in spaced relation from said one portion for movement toward and away from said one contact upon heating and cooling of the strip, respectively, stop means on the base for arresting movement of said other contact away from said one contact, a second pair of normally closed contacts including one contact mounted on the base and the other contact mounted on the strip in spaced relation from said one portion and said one contact of said second pair of contacts for movement toward and away from the latter upon cooling and heating of the strip, respectively, bi-stable means associated with said strip adjacent said second pair of contacts for alternately releasably lholding the latter open and closed, electric heating means disposed in thermal conductive juxtaposition to said strip in series with said second pair of contacts for heating said strip, said strip being arranged so that warping thereof in said one
  • An automatic recycling device comprising, a thermally responsive member, a first pair of normally open contacts with one contact being xed and the other contact being mounted on said member for movement toward said one contact upon heating of said member and for movement away from said one contact upon cooling of said member, stop means for stopping movement of said other contact away from said one contact, a second pair of normally closed contacts with one contact thereof being tixed and the other contact being mounted on said member, bi-stable means for alternately releasably holding said second pair of contacts closed and opened, said member being mounted so that upon being heated said first pair of contacts are closed and said second pair of contacts are then opened and so that upon being cooled said rst pair of contacts open followed by closing of said second pair of contacts, electric heating means in thermal conductive juxtaposition with said member, said heating means having two terminals with one terminal connected to said member and the other terminal connected to one of a pair of line terminals, a load device with one terminal thereof connected to said one contact of said first pair of contacts and with the other terminal connected to said one line
  • the device according to claim 6 further delined by a connection between said one load terminal and said other line terminal, a normally open switch in said connection, means operated by the load device for closing said switch after said load device has been energized and for maintaining said switch closed for a motor operating cycle.
  • thermoly responsive member comprises a bimetal strip.
  • stop means is adjustable for varying a cycle of operation of the recycling device.
  • An automatic recycling device comprising, a rst pair of normally lopen contacts and a second pair of normally closed contacts, means including an elongated, thermally responsive member supported at one portion thereof and having the remaining portion thereof free to bend upon heating and cooling, said member supporting one contact of each of said pairs of contacts in spaced relation along the length of the former, base means fixedly supporting the other contact of cach of said pairs of contacts in spaced relation longitudinally of said member, biasing means yieldably holding said second pair of contacts closed, said member being adapted, upon being heated, to bend in one direction thereby to close said first pair of contacts whereupon movement of said member at the portion thereof adjacent said rst contacts is stopped so that continued bending of said member in said one direction subsequently causes opening of said second pair of contacts, said member also being adapted, upon being cooled, to bend in the other direction thereby to open said rst pair of contacts and thereafter to close said second pair of contacts, electric heating means in thermal conductive juxtaposition with said thermally responsive means, said heating means being in series With said
  • biasing means comprising bi-stable means for alternately releasably holding said second pair of contacts closed and opened.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US437377A 1965-03-05 1965-03-05 Thermally responsive member with longitudinally spaced contacts each actuated upon bending of the member in one direction Expired - Lifetime US3342963A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US437377A US3342963A (en) 1965-03-05 1965-03-05 Thermally responsive member with longitudinally spaced contacts each actuated upon bending of the member in one direction
GB8854/66A GB1125407A (en) 1965-03-05 1966-03-01 Improved recycling electric switch and circuit therefor
DE19661665569 DE1665569A1 (de) 1965-03-05 1966-03-04 Periodisch arbeitender Umschalter mit Stromkreis
NL6602884A NL6602884A (de) 1965-03-05 1966-03-04
FR52157A FR1475979A (fr) 1965-03-05 1966-03-04 Commutateur et circuit pour celui-ci
BE677364D BE677364A (de) 1965-03-05 1966-03-04
SE2859/66A SE313869B (de) 1965-03-05 1966-03-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US437377A US3342963A (en) 1965-03-05 1965-03-05 Thermally responsive member with longitudinally spaced contacts each actuated upon bending of the member in one direction

Publications (1)

Publication Number Publication Date
US3342963A true US3342963A (en) 1967-09-19

Family

ID=23736168

Family Applications (1)

Application Number Title Priority Date Filing Date
US437377A Expired - Lifetime US3342963A (en) 1965-03-05 1965-03-05 Thermally responsive member with longitudinally spaced contacts each actuated upon bending of the member in one direction

Country Status (6)

Country Link
US (1) US3342963A (de)
BE (1) BE677364A (de)
DE (1) DE1665569A1 (de)
GB (1) GB1125407A (de)
NL (1) NL6602884A (de)
SE (1) SE313869B (de)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957088A (en) * 1932-12-27 1934-05-01 Financial Press Companies Switch
US2045821A (en) * 1931-04-20 1936-06-30 Charles M Stroud Control mechanism
US2309193A (en) * 1939-10-30 1943-01-26 Honeywell Regulator Co Thermostat
US2347514A (en) * 1940-05-04 1944-04-25 Telephone Answering And Record Control method and apparatus
US2374097A (en) * 1942-05-01 1945-04-17 Honeywell Regulator Co Two stage control instrument
US2403798A (en) * 1942-05-04 1946-07-09 Honeywell Regulator Co Summer-winter control instrument
US2673269A (en) * 1950-05-29 1954-03-23 Oakes Mfg Company Thermostatic switch
US2798131A (en) * 1953-10-19 1957-07-02 Collier Richard Electric heat regulating switch
US2825785A (en) * 1951-05-16 1958-03-04 Eric H Taylor Thermally controlled electric switches
US2871315A (en) * 1957-06-20 1959-01-27 Dales George Franklin Thermostat and method of making

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2045821A (en) * 1931-04-20 1936-06-30 Charles M Stroud Control mechanism
US1957088A (en) * 1932-12-27 1934-05-01 Financial Press Companies Switch
US2309193A (en) * 1939-10-30 1943-01-26 Honeywell Regulator Co Thermostat
US2347514A (en) * 1940-05-04 1944-04-25 Telephone Answering And Record Control method and apparatus
US2374097A (en) * 1942-05-01 1945-04-17 Honeywell Regulator Co Two stage control instrument
US2403798A (en) * 1942-05-04 1946-07-09 Honeywell Regulator Co Summer-winter control instrument
US2673269A (en) * 1950-05-29 1954-03-23 Oakes Mfg Company Thermostatic switch
US2825785A (en) * 1951-05-16 1958-03-04 Eric H Taylor Thermally controlled electric switches
US2798131A (en) * 1953-10-19 1957-07-02 Collier Richard Electric heat regulating switch
US2871315A (en) * 1957-06-20 1959-01-27 Dales George Franklin Thermostat and method of making

Also Published As

Publication number Publication date
BE677364A (de) 1966-09-05
DE1665569A1 (de) 1971-12-23
NL6602884A (de) 1966-09-06
GB1125407A (en) 1968-08-28
SE313869B (de) 1969-08-25

Similar Documents

Publication Publication Date Title
US2394121A (en) Resettable snap action thermal limit switch
US3038051A (en) Thermal device
US3342963A (en) Thermally responsive member with longitudinally spaced contacts each actuated upon bending of the member in one direction
US2459083A (en) Refrigerator provided with a defrosting control for the refrigeration system thereof
US3423712A (en) Thermal protective device having rapid response to sudden high overloads and delayed response to moderate overloads
US1839935A (en) Electric thermostat
US2458807A (en) Thermostatic switch
US1726233A (en) Motor-starting switch
US3495101A (en) Thermal motor
US3636490A (en) Thermal cycling heat range switch with wiping action
US3371175A (en) Self-adjusting thermally-responsive electric switch
US2993976A (en) Heater control
US2310543A (en) Domestic appliance
US2861149A (en) Snap action switch
US3222481A (en) Electrically powered bistable thermal relay switch
US2305385A (en) Starting switch
US5017954A (en) Camera shutter with thermal actuator
US2095846A (en) Thermostatically-controlled switch
US2658175A (en) Electrical apparatus
US2016244A (en) Thermostat
US2716173A (en) Electric switches
US2355041A (en) Heat motor
US2513748A (en) Electric switch
US2461903A (en) Thermostatic control
US2371672A (en) Circuit breaker

Legal Events

Date Code Title Description
AS Assignment

Owner name: DMW SCHWARZE GMBH TUREN & TORE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KEMPER, KATE;REEL/FRAME:005782/0941

Effective date: 19910411

Owner name: NEUENKIRCHENER EISENGIESSEREI UND MASCHINENFABRIK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DMW SCHWARZE GMBH TUREN & TORE;REEL/FRAME:005782/0884

Effective date: 19910626