US2659787A - Thermally controlled electric switch - Google Patents
Thermally controlled electric switch Download PDFInfo
- Publication number
- US2659787A US2659787A US222411A US22241151A US2659787A US 2659787 A US2659787 A US 2659787A US 222411 A US222411 A US 222411A US 22241151 A US22241151 A US 22241151A US 2659787 A US2659787 A US 2659787A
- Authority
- US
- United States
- Prior art keywords
- switch
- thermally controlled
- electric switch
- controlled electric
- lamps
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
- B60Q1/38—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction using immovably-mounted light sources, e.g. fixed flashing lamps
- B60Q1/387—Mechanical temporisation
-
- 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
- H01H61/066—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts making use of an extensible wire, rod or strips
Definitions
- This invention has for its object to provide a thermally controlled electric switch tor enabling lamps on a road vehicle to give flashing signals when a change of direction is intended.
- the invention comprises the combination of a spring-loaded movable member made wholly or partly of iron and carrying a contact which cooperates with a fixed contact, an adjacent springloaded member carrying or consisting of a percontrolling the second member, and a stop for" limiting the movement of'the first member.
- Figure 1 is a sectional side elevation of a switch embodying the invention.
- Figure 3 is a diagram illustrating a modified detail.
- a rigid metal member b carrying a fixed contact 0 and having at one end a circuit terminal d.
- a rivet c there is secured to the member b a spring blade I which at one end is secured to an iron piece or carrying the movable contact h.
- the extent of separation of the contacts is limited by an insulating stop i extending from one end of the member b.
- the spring blade I is bent to a U-form, and on its part 7' is secured a permanent magnet k which is situated adjacent to the iron piece g.
- the member 7' may consist of a separate spring blade electrically connected to the blade I.
- a metal piece m on which are formed two tongue pieces, 0, p.
- the tongue piece 0 is connected to a metal part q carried by the base a, and provided with a circuit terminal 1'.
- the various parts secured to the member b by the rivet e are suitably insulated from each other by intermediate washers as 8 made from electrically insulating material.
- the tongue piece p is connected to the free end of the part i by a metal wire t or thin ribbon which is extensible by the a heating action of an adequate current passing through it.
- the switch is enclosed by a cover z attached to the base a.
- the switch above described is intended to be connected in a. direction-indicator system comprising lamp circuits which are arranged in the manner shown in Figure 2.
- the system shown in Figure 2 comprises right and left hand rear signal lamps u, right and left hand front signal lamps v, and warning lamps w (or a single warning lamp w as shown in Figure 3) mounted in a position visible to the driver.
- the lamp circuits are controlled by a manually operable switch 2:, and current is supplied to the lamps by a battery 1 the thermally controlled switch being arranged in series with the battery and the switch 2:. 1
- the intermittent opening and closing of the switch causes the lamps to give the desired flashing signals, and the signals continue so long as the switch :2: remains closed.
- the flashing of the lamp w then in action announces to the driver that the lamps u, v are working properly. But in the event of failure of either or both of the lamps u, v, the current then flowing through the wire t will be inadequate to efiect the required heating of the wire.
- the switch controlled by the wire will therefore remain closed, and the steady light then given by the warning lamp will announce the existence of a fault to the driver.
- thermoly controlled switch for the purpose above described can be provided in a simple and reliable form.
- a thermally controlled electric switch for giving flashing signals comprising, in combination, a spring loaded movable member including an iron part, a contact carried by said movable member, a fixed contact to which said first contact is normally held by the spring loading of the movable member, a spring loaded member including a permanent magnet arranged adjacent the movable member and adapted to actuate the latter in a direction to separate the contacts, a thermally extensible wire-like element connected an electric circuit with the fixed and movable contacts and the arrangement being such that current flowing through the wire-like member causes expansion thereof to permit the permanent magnet to move near enough to the iron member to eflect separation of the contact; which are thereby intermittently opened and closed.
- a switch according to claim 1 in which the med contact is carried by a rigid member secured to a base and the iron part is carried by a spring blade and is provided with a contact, and
- the permanent magnet is carried by a second spring blade integral with the first said spring blade.
Description
NOV. 17 19 53 A. D. PRICKETT' 2,659,787
THERMALLY CONTROLLED ELECTRIC SWITCH Filed April 23, 1951 Patented Nov. 1 7,1953
THERMALLY CONTROLLED ELECTRIC SWITCH Alfred Donald Prickett, Handsworth, Birmingham, England, assignor to Joseph Lucas Limited, Birmingham, England Application April 23, 1951, Serial No. 222,411
Claims priority, application Great Britain May 5, 1950 z Claims. (01. 200-113) This invention has for its object to provide a thermally controlled electric switch tor enabling lamps on a road vehicle to give flashing signals when a change of direction is intended.
The invention comprises the combination of a spring-loaded movable member made wholly or partly of iron and carrying a contact which cooperates with a fixed contact, an adjacent springloaded member carrying or consisting of a percontrolling the second member, and a stop for" limiting the movement of'the first member.
In the accompanying drawings;
Figure 1 is a sectional side elevation of a switch embodying the invention.
Figure 2 is a diagram illustrating an applica= tion of the invention to a direction-indicator system.
Figure 3 is a diagram illustrating a modified detail.
Referring to Figure 1, there is secured to an insulating base a, a rigid metal member b carrying a fixed contact 0 and having at one end a circuit terminal d. By means of a rivet c there is secured to the member b a spring blade I which at one end is secured to an iron piece or carrying the movable contact h. The extent of separation of the contacts is limited by an insulating stop i extending from one end of the member b. The spring blade I is bent to a U-form, and on its part 7' is secured a permanent magnet k which is situated adjacent to the iron piece g. Alternatively the member 7' may consist of a separate spring blade electrically connected to the blade I. Further there is secured to the member b by the rivet e a metal piece m on which are formed two tongue pieces, 0, p. The tongue piece 0 is connected to a metal part q carried by the base a, and provided with a circuit terminal 1'. The various parts secured to the member b by the rivet e are suitably insulated from each other by intermediate washers as 8 made from electrically insulating material. The tongue piece p is connected to the free end of the part i by a metal wire t or thin ribbon which is extensible by the a heating action of an adequate current passing through it. The switch is enclosed by a cover z attached to the base a.
The switch above described is intended to be connected in a. direction-indicator system comprising lamp circuits which are arranged in the manner shown in Figure 2. The system shown in Figure 2 comprises right and left hand rear signal lamps u, right and left hand front signal lamps v, and warning lamps w (or a single warning lamp w as shown in Figure 3) mounted in a position visible to the driver. The lamp circuits are controlled by a manually operable switch 2:, and current is supplied to the lamps by a battery 1 the thermally controlled switch being arranged in series with the battery and the switch 2:. 1
When the driver moves the switch a: to the right or left to bring the desired signal lamps into action, the current passing to the lamps heats the wire t and the consequent extension of the wire allows the blade 1' and magnet la to move towards the iron piece 9, and when the magnet approaches the piece a it exerts a pull on the latter causing the contacts 0, h to be separated suddenly, thereby interrupting the supply of current to the lamps. This interruption of the current also results in interruption of the current through the wire t. The latter thereupon cools, and its consequent contraction causes the magnet to be returned to its initial position, thereby allowing the contact pieces to, re-close and re-establish the current through the lamps. The intermittent opening and closing of the switch causes the lamps to give the desired flashing signals, and the signals continue so long as the switch :2: remains closed. At the same time the flashing of the lamp w then in action announces to the driver that the lamps u, v are working properly. But in the event of failure of either or both of the lamps u, v, the current then flowing through the wire t will be inadequate to efiect the required heating of the wire. The switch controlled by the wire will therefore remain closed, and the steady light then given by the warning lamp will announce the existence of a fault to the driver.
By this invention, a thermally controlled switch for the purpose above described can be provided in a simple and reliable form.
Having thus described my invention what I claim as new and desire to secure by Letters Patent is:
1. A thermally controlled electric switch for giving flashing signals comprising, in combination, a spring loaded movable member including an iron part, a contact carried by said movable member, a fixed contact to which said first contact is normally held by the spring loading of the movable member, a spring loaded member including a permanent magnet arranged adjacent the movable member and adapted to actuate the latter in a direction to separate the contacts, a thermally extensible wire-like element connected an electric circuit with the fixed and movable contacts and the arrangement being such that current flowing through the wire-like member causes expansion thereof to permit the permanent magnet to move near enough to the iron member to eflect separation of the contact; which are thereby intermittently opened and closed.
2. A switch according to claim 1, in which the med contact is carried by a rigid member secured to a base and the iron part is carried by a spring blade and is provided with a contact, and
the permanent magnet is carried by a second spring blade integral with the first said spring blade.
ALFRED DONALD PRICKE'I'I.
' References Cited in the file oi! this patent UNITED sTA'ms PATENTS Number Name Date 1,946,894 Brogger Feb. 13, 1934 1,958,482 Leins May 15, 1934 2,243,583 Hottenroth, Jr May 27, 1941 2,451,618 Gross Oct. 19, 1948 2,512,268 Eros et a1 Oct. 20, 1950 2,514,604 Hollins July 11, 1950
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB11140/50A GB678760A (en) | 1950-05-05 | 1950-05-05 | A thermally controlled electric switch |
Publications (1)
Publication Number | Publication Date |
---|---|
US2659787A true US2659787A (en) | 1953-11-17 |
Family
ID=9980772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US222411A Expired - Lifetime US2659787A (en) | 1950-05-05 | 1951-04-23 | Thermally controlled electric switch |
Country Status (4)
Country | Link |
---|---|
US (1) | US2659787A (en) |
DE (1) | DE868172C (en) |
FR (1) | FR1036382A (en) |
GB (1) | GB678760A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2700083A (en) * | 1952-03-22 | 1955-01-18 | Fred J Burt | Flasher switch |
US2749404A (en) * | 1952-08-08 | 1956-06-05 | Cook Electric Co | Electrical timing apparatus |
US2769938A (en) * | 1955-03-11 | 1956-11-06 | Theodore W Hallerberg | Means for flashing signal lights |
US2820881A (en) * | 1954-04-12 | 1958-01-21 | Knapp Monarch Co | Vacuum type coffee maker and cycling switch mechanism therefor |
US2839661A (en) * | 1954-07-27 | 1958-06-17 | Knapp Monarch Co | Coffee maker and switch therefor |
US2842638A (en) * | 1955-02-01 | 1958-07-08 | Lionel Corp | Thermally controlled electric switches |
US2843802A (en) * | 1955-09-01 | 1958-07-15 | Gen Motors Corp | Tell-tale circuit |
US3056000A (en) * | 1960-10-21 | 1962-09-25 | Alfred R Lucas | Snap acting magnetic switch construction |
US3143618A (en) * | 1960-06-11 | 1964-08-04 | Platen Baltzar Carl Von | Thermally responsive electric circuit breaker |
US3953817A (en) * | 1974-08-05 | 1976-04-27 | Littelfuse, Inc. | Flasher device |
US8754773B1 (en) | 2004-02-21 | 2014-06-17 | Lee Von Gunten | Device for simulating human activity in an unoccupied dwelling |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1053111B (en) * | 1955-09-02 | 1959-03-19 | Wella Ag | Electric temperature controller |
DE1049015B (en) * | 1957-07-16 | 1959-01-22 | Licentia Gmbh | Control device for space heaters with fan |
DE1052875B (en) * | 1958-01-10 | 1959-03-12 | Bosch Gmbh Robert | Electromagnetic switch for triggering intermittent signals, in particular light signals for indicating the direction of travel of motor vehicles |
DE1104025B (en) * | 1958-02-27 | 1961-04-06 | Licentia Gmbh | Switching device for the automatic, periodic closing and opening of a circuit |
DE3137781A1 (en) * | 1981-09-23 | 1983-04-21 | Robert Bosch Gmbh, 7000 Stuttgart | ELECTRICAL CIRCUIT ARRANGEMENT TO SUPPLY FLASHING LAMP |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1946894A (en) * | 1932-05-14 | 1934-02-13 | Edison Splitdorf Corp | Electrical current responsive device |
US1958482A (en) * | 1932-07-28 | 1934-05-15 | Milwaukee Gas Specialty Co | Magnetic switch |
US2243563A (en) * | 1939-06-30 | 1941-05-27 | Gen Electric | Control device |
US2451618A (en) * | 1948-10-19 | Combined thermal and magnetic | ||
US2512268A (en) * | 1947-10-29 | 1950-06-20 | Gen Electric | Permanent magnet hot-wire starting device |
US2514604A (en) * | 1948-12-24 | 1950-07-11 | Jesse R Hollins | Direction switch for vehicle lighting circuits |
-
1950
- 1950-05-05 GB GB11140/50A patent/GB678760A/en not_active Expired
-
1951
- 1951-04-23 US US222411A patent/US2659787A/en not_active Expired - Lifetime
- 1951-04-30 FR FR1036382D patent/FR1036382A/en not_active Expired
- 1951-05-06 DE DEL8947A patent/DE868172C/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2451618A (en) * | 1948-10-19 | Combined thermal and magnetic | ||
US1946894A (en) * | 1932-05-14 | 1934-02-13 | Edison Splitdorf Corp | Electrical current responsive device |
US1958482A (en) * | 1932-07-28 | 1934-05-15 | Milwaukee Gas Specialty Co | Magnetic switch |
US2243563A (en) * | 1939-06-30 | 1941-05-27 | Gen Electric | Control device |
US2512268A (en) * | 1947-10-29 | 1950-06-20 | Gen Electric | Permanent magnet hot-wire starting device |
US2514604A (en) * | 1948-12-24 | 1950-07-11 | Jesse R Hollins | Direction switch for vehicle lighting circuits |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2700083A (en) * | 1952-03-22 | 1955-01-18 | Fred J Burt | Flasher switch |
US2749404A (en) * | 1952-08-08 | 1956-06-05 | Cook Electric Co | Electrical timing apparatus |
US2820881A (en) * | 1954-04-12 | 1958-01-21 | Knapp Monarch Co | Vacuum type coffee maker and cycling switch mechanism therefor |
US2839661A (en) * | 1954-07-27 | 1958-06-17 | Knapp Monarch Co | Coffee maker and switch therefor |
US2842638A (en) * | 1955-02-01 | 1958-07-08 | Lionel Corp | Thermally controlled electric switches |
US2769938A (en) * | 1955-03-11 | 1956-11-06 | Theodore W Hallerberg | Means for flashing signal lights |
US2843802A (en) * | 1955-09-01 | 1958-07-15 | Gen Motors Corp | Tell-tale circuit |
US3143618A (en) * | 1960-06-11 | 1964-08-04 | Platen Baltzar Carl Von | Thermally responsive electric circuit breaker |
US3056000A (en) * | 1960-10-21 | 1962-09-25 | Alfred R Lucas | Snap acting magnetic switch construction |
US3953817A (en) * | 1974-08-05 | 1976-04-27 | Littelfuse, Inc. | Flasher device |
US8754773B1 (en) | 2004-02-21 | 2014-06-17 | Lee Von Gunten | Device for simulating human activity in an unoccupied dwelling |
Also Published As
Publication number | Publication date |
---|---|
GB678760A (en) | 1952-09-10 |
FR1036382A (en) | 1953-09-07 |
DE868172C (en) | 1953-02-23 |
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