New! View global litigation for patent families

US2911637A - Electric flashlights or torches - Google Patents

Electric flashlights or torches Download PDF

Info

Publication number
US2911637A
US2911637A US73519458A US2911637A US 2911637 A US2911637 A US 2911637A US 73519458 A US73519458 A US 73519458A US 2911637 A US2911637 A US 2911637A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
contact
cap
switch
bimetal
strip
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
Inventor
Wortmann Herbert
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.)
CARL VON DER CRONE AND CO
Original Assignee
CARL VON DER CRONE AND CO
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
Grant date

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0414Arrangement of electric circuit elements in or on lighting devices the elements being switches specially adapted to be used with portable lighting devices

Description

NOV. 3, H WQRTMANN ELECTRIC FLASHLIGHTS OR TORCl-IES Filed May 14, 1958 F/& 1?

FIG. I

MM WWW M W United States Patent F ELECTRIC FLASHLIGH'I'S OR TORCHES Herbert Wortmann, Luedenscheid, Germany, assignor to Carl von der Crone & C0., Lnedenscheid, Germany Application May 14, 1958, Serial No. 7 35,194 Claims priority, application Germany May 16, 1957 6 Claims. (Cl. 340-321) This invention relates to flashlights, and more particularly to flashlights provided with flasher means adapted to cyclically close and open an electric circuit including an incandescent lamp so as to produce intermittent light flashes in a predetermined rhythm.

It is one object of the invention to provide an attach- 1 ment for converting a standard flashlight having a cylindrical casing for receiving dry cells into an intermittently operating signalling light.

It is another object of this invention to provide an attachment of the aforementioned character which draws a minimum of current from the dry cells of the standard flashlight by which it is supplied with current.

Another object of this invention is to provide an attachment of the aforementioned character comprising a rugged mechanical flasher switch involving a bimetallic control strip rather than a highly sensitive flasher switch as, for instance, a mercury switch operated and controlled by an electromagnet, or solenoid.

The novel features that are characteristic of the invenition are set forth in particular in the appended claims.

The invention itself, however, both as to structure and operation together with additional objects and advantages thereof will best be understood from the following detailed description of a preferred embodiment thereof when read in connection with the accompanying drawing in which:

Fig. 1 illustrates a cylindrical flashlight, the lower portion of which is shown in section;

Fig. 2 is the wiring diagram of a flashlight attachment embodying the invention;

Figs. 3 to 9 are details of the end cap, viz,

Fig. 3 is a front view of the cap, the bottom thereof iaving been broken away to expose its inside to view;

Fig. 4 is a front view of an insulating partition housed I in the cap;

Figs. 5 and 6 show the end cap seen from the outside, nd from the inside, respectively; and

Figs. 7 to 9 show the constituent parts of a sliding switch on the base of the cap, Fig. 7 being a top plan view of the movable contact of the switch, Fig. 8 being a section taken along line 88 of Fig. 7, and Fig. 9 being a side elevation of the manual operator of the switch.

The cylindrical casing 1 comprises the usual type of main switch 2 adapted to remain either in the open position or closed position thereof. Casing 1 is screwthreaded at 1a. Cap 3 has a screw-threaded side portion 3a and a bottom portion 4 defining an external reces's 4a. Transverse insulating partition 5 is arranged inside of cap 3 between the base 4 of the cap and the open end thereof. The upper surface of partition 5 supports a metal cup 6. Cup 6 is secured to partition 5 by means of screws 7 or the like. Cup 6 detachably engages with its upturned edge the largest winding of tapering compression coil spring 8, which is a cell-supporting spring and makes contact with the bottom end of the cylindrical dry cell 9. The base of the cup 6 has a thread receiving ICC screw lflforming a fixed adjustable Contact of a bimetal flasher switch. The bimetal strip 11 is provided on the free end thereof with a movable contact 12. The heating wire 13 is wound around the bimetal strip 11 and adapted to heat the latter. Contact 12 is preferably made of silver and adapted to conductively connect one end of heating winding 13 to bimetal strip 11. The opposite end of winding 13 is conductively connected to fixed contact 10. As long as bimetal strip 11 is relatively cool contacts 10, 12 are spaced and the current supplied by dry cell 9 flows through heating winding 13. When bimetal strip 11 is sufficiently warm and warped, contacts 10, 12 are in engagement and then winding 13 is shunted out of the circuit of cell 9.

The diagram of Fig. 2 shows that the circuit of dry cell 9 includes incandescent lamp 15. The circuit of dry cell 9 is controlled by the main switch 2 arranged in series with two other switches connected in parallel, i.e. the bimetal switch 10, 11, 12, 13 on the one hand, and the sliding switch 14, on the other hand. If the main switch 2 is closed and the switch 14 is open, the current flows through the heating wire 13 and heats the bimetal strip 11, thus causing the contact 12 thereof to abut against the fixed contact 10. As a result, the heating wire 13 is deenergized and cools oif. Consequently the bimetal strip 11 disengages its contact 12 from the contact 10. Therefore" a periodical intermittent light signal is emitted as long as switch 2 is closed. If a permanent light beam is desired or required, switch 14 is closed, and the bimetal switch 10, 11, 12, 13 shunted out and rendered inoperative. It is thus apparent that any standard flashlight having a cylindrical screw-threaded casing may be converted into a flashlight adapted to emit at will either a steady light, or intermittent light signals.

.Partition 5 forms an integral part of a cap of insulating material to which the same reference character has been applied. Cap 5 is arranged inside of cap 3. The open end of cap 5 is juxtaposed to the closed or bottom end of cap 3. Thus caps 3 and 5 define the entirely closed chamber A accommodating switch 10, 11, 12, 13. Cap 3 forms an open chamber B accommodating parts 6 and 8.

The lower surface of insulating partition 5 supports by means of screws 7 a plate 15. Screws '7 provide a conductive connection between plate 15 and cup 6. A contact flap or tab 15b which may also be formed by a cut-out portion of this disc 15projeets through a slot 15a in plate 15 into chamber A. This flap 15b is a fixed contact. Fixed contact 15b is adapted to cooperate with a sliding contact of the sliding switch 14, which is disposed on the inner surface of the cap bottom 4. The above sliding contact comprises a contact end 1412 cooperating with the fixed tab 15b. Operating handle or slide 14g of switch 14 is arranged in recess 4a and has flaps 14a which project through slots in the cap bottom 4 and are bent over sliding contact 140 (see Fig. 6). The end 14d of the slide contact 14c is adapted to establish two stable end positions and to minimize contact resistance between parts 14c and 4. The right end 11a of bimetal strip 11 is extended far enough to contact the live cap bottom 4.

The adjustable screw 10 may be substituted by a second or additional bimetal strip, to compensate for changes in ambient temperature, thus automatically maintaining a constant flash frequency. It will be understood that although but one embodiment of the invention has been illustrated and described in detail, the invention is not. limited thereto. It will also be understood that the struc-- ture illustrated may be modified without departing from. thespirit and scope of the invention as set forth in the;

accompanying claims.

Patented Nov. 3, 1959 j I claim as my invention:

1. An attachment for converting a standard flashlight having a cylindrical screw-threaded casing for receiving dry cells into an intermittently operating signal-ling light comprising a screw-threaded cap adapted to close a flashlight casing; a transverse insulating partition arranged inside of said cap subdividing said cap into an open chamher and a closed chamber; a cell-supporting spring sup ported by said partition and arranged in said open chamher; said closed chamber accommodating a pair of cooperating separable contacts, a bimetal strip supporting one of said pair of contacts, and a resistor adapted to heat said bimetal strip connected across said pair of contacts to be shunted out upon warping of said bimetal strip causing engagementof said pair of contacts; and means conductively connecting one of said pair of contacts to said spring and the other of said pair of contacts to said cap.

. 2. An attachment as specified in claim 1 wherein said closed chamber accommodates a manually operable switch adapted to shunt said pair of contacts at will.

3. An attachment as specified in claim 1 wherein the other of said pair of contacts is supported by an additional bimetal strip.

4. An attachment for converting a standard flashlight having a cylindrical screw-threaded casing for receiving dry cells into an intermittently operating signalling light comprising a cap adapted to close a flashlight casing and having a screw-threaded side portion and a bottom portion defining an external recess therein; a transverse insulating partition arranged inside of said cap subdividing said cap into an open chamber and a closed chamber; a cell-supporting spring supported by said partition and arranged in said open chamber; said closed chamber ac commodating a fixed contact supported by said partition, a cooperating movable contact, a bimetal strip supporting said movable contact adjacent one of the ends thereof and being supported by said partition, and a resistor wound around said bimetal strip and connected across said fixed contact and said movable contact to be shunted out upon warpingof said bimetal strip causing engagement of said fixed contact by said movable contact; means conductively connecting said fixed contact to said spring and said himetal strip to said cap; said closed chamber further accommodating a manually operable switch adapted to shunt at will said fixed contact and said movable con tact, and said switch comprising an operating member arranged in said external recess defined by said bottom portion of said cap and movable in the direction of a diameter of said cap.

5. An attachment for converting a standard flashlight having a screw-threaded cylindrical casing for receiving dry cells into an intermittently operating signalling light comprising a first cap adapted to close a flashlight casing and having a screw-threaded side portion and a bottom portion defining an external recess therein; a second cap of insulating material arranged inside said first cap, the I winding held in position by said upturned edge of said metal cup; said closed chamber accommodating a pair of cooperating separable contacts, a bimetal strip supporting one of said pair of contacts, and a resistor adapted to heat said bimetal strip connected across said pair of contacts to be shunted out upon warping of said bimetal strip causing engagement of said pair of contacts; means for conductively connecting one of said pair of contacts to said spring and the other of said pair of contacts to said first cap; said closed chamber further accommodating a manually operable switch adapted to shunt at will said fixed contact and said movable contact, and said switch comprising an operating member arranged in said external a recess defined by said bottom of said first cap;',

, able switch 6. An attachment for converting a standard flashlight having a cylindrical screw-threaded casing for receiving dry cells into an intermittently operating signalling light comprising a cap adapted to close a flashlight casing and having a screw-threaded side portion and a bottom portion defining an external recess therein; a transverse insulating partition arranged inside of said cap subdividing'said cap into an open chamber and a closed chamber; a cellsupporting spring supported by said partition and arranged in said open chamber; said closed chamber accommodating a fixed contact supported by said partition, a bimetal strip supported by said partition at a point intermediate both ends thereof and having one end conductively connected to said cap, a movable contact cooperating with said fixed contact supported by said bimetal strip adjacent the other end thereof, and a resistor wound around said bimetal strip and having one end connected to said fixed contact and the other end connected to said bimetal strip;-

means extending transversely across said partition conductively connecting said spring to said fixed contact; said closed chamber further accommodating a manually operadapted to shunt at will said fixed contact and said movable contact, and said switch comprising an operating member arranged within said external recess defined by said bottom portion of said cap.

References Cited in the file of this patent UNITED STATES PATENTS 2,090,293 Haines Aug. 17, 1937 2,557,859 Bernstein June 19, 1951 2,675,545 Wolfer Apr. 13, 1954 2,739,305 Harmon Mar. 20, 1956 2,804,611 Craddoek Aug. 27, 1957

US2911637A 1957-05-16 1958-05-14 Electric flashlights or torches Expired - Lifetime US2911637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2911637X 1957-05-16

Publications (1)

Publication Number Publication Date
US2911637A true US2911637A (en) 1959-11-03

Family

ID=8001081

Family Applications (1)

Application Number Title Priority Date Filing Date
US2911637A Expired - Lifetime US2911637A (en) 1957-05-16 1958-05-14 Electric flashlights or torches

Country Status (1)

Country Link
US (1) US2911637A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015811A (en) * 1959-03-09 1962-01-02 Harry Rubin & Sons Inc Portable fire alarm unit
US3047798A (en) * 1959-07-13 1962-07-31 Arthur B Winslett Flashlight tester
US3114906A (en) * 1962-05-11 1963-12-17 Frank S Hertzig Portable flare
US3171109A (en) * 1961-07-21 1965-02-23 Andrew L Appel Combined flashlight, fire alarm, and distress signal
US3201771A (en) * 1961-12-08 1965-08-17 John J Proulx Fireman's helmet
US3530455A (en) * 1967-03-02 1970-09-22 Avco Corp Door chime alarm system
US3579222A (en) * 1968-01-25 1971-05-18 Wilbern Marvin Freeman Portable burglar alarm
US3725834A (en) * 1971-10-27 1973-04-03 R Dorsey Electric switches
US4556863A (en) * 1982-12-06 1985-12-03 Slater Electric Inc. Emergency light switch
US4563668A (en) * 1983-12-12 1986-01-07 Martino Peter V Obstruction marker light
US5349241A (en) * 1992-10-13 1994-09-20 Cpx Industries, Inc. Multiple point controlled flashing locator system
US5406129A (en) * 1992-10-13 1995-04-11 Cpx Industries, Inc. Flashing locator switch control with built-in lamp operation test

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2090293A (en) * 1935-08-24 1937-08-17 Haines John Ralph Highway road flare
US2557859A (en) * 1947-08-12 1951-06-19 Bernstein Harry Emergency road signal
US2675545A (en) * 1950-12-07 1954-04-13 Edward I Wolper Flashing safety lamp
US2739305A (en) * 1952-02-18 1956-03-20 Hugh E Hayes Combination flash and beacon light
US2804611A (en) * 1956-03-26 1957-08-27 Charles L Craddock Flashing light for signalling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2090293A (en) * 1935-08-24 1937-08-17 Haines John Ralph Highway road flare
US2557859A (en) * 1947-08-12 1951-06-19 Bernstein Harry Emergency road signal
US2675545A (en) * 1950-12-07 1954-04-13 Edward I Wolper Flashing safety lamp
US2739305A (en) * 1952-02-18 1956-03-20 Hugh E Hayes Combination flash and beacon light
US2804611A (en) * 1956-03-26 1957-08-27 Charles L Craddock Flashing light for signalling

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015811A (en) * 1959-03-09 1962-01-02 Harry Rubin & Sons Inc Portable fire alarm unit
US3047798A (en) * 1959-07-13 1962-07-31 Arthur B Winslett Flashlight tester
US3171109A (en) * 1961-07-21 1965-02-23 Andrew L Appel Combined flashlight, fire alarm, and distress signal
US3201771A (en) * 1961-12-08 1965-08-17 John J Proulx Fireman's helmet
US3114906A (en) * 1962-05-11 1963-12-17 Frank S Hertzig Portable flare
US3530455A (en) * 1967-03-02 1970-09-22 Avco Corp Door chime alarm system
US3579222A (en) * 1968-01-25 1971-05-18 Wilbern Marvin Freeman Portable burglar alarm
US3725834A (en) * 1971-10-27 1973-04-03 R Dorsey Electric switches
US4556863A (en) * 1982-12-06 1985-12-03 Slater Electric Inc. Emergency light switch
US4563668A (en) * 1983-12-12 1986-01-07 Martino Peter V Obstruction marker light
US5349241A (en) * 1992-10-13 1994-09-20 Cpx Industries, Inc. Multiple point controlled flashing locator system
US5406129A (en) * 1992-10-13 1995-04-11 Cpx Industries, Inc. Flashing locator switch control with built-in lamp operation test

Similar Documents

Publication Publication Date Title
US2915621A (en) Flashlight
US762720A (en) Portable electric light.
US2212103A (en) Flashlight
US4455546A (en) Variable resistor and switch assembly having separate sliders
US3300711A (en) Lamp dimmer
US2978696A (en) Illuminated hat
US2279753A (en) Switch
US2581308A (en) Controlling and indicating device
US2225936A (en) Flashlight
US3081388A (en) Thermostatic controls
US4366416A (en) Fluorescent lamp device
US1898174A (en) Flasher device
US1946059A (en) Flash light
US3351736A (en) Portable electric cigarette lighter
US2394121A (en) Resettable snap action thermal limit switch
US3603783A (en) Lantern having magnetic lamp focusing and switching
US2292918A (en) Electric cigar lighter
US2405929A (en) Electrical apparatus
US2493190A (en) Vibration-proof thermostatic switch
US3371175A (en) Self-adjusting thermally-responsive electric switch
GB1058466A (en) Miniaturized flashlight with replacement cartridge unit
US2293660A (en) Flashlight
US2811629A (en) Aquarium heating and indicating device
US2830166A (en) Control connector plug
US2234972A (en) Flashlight