GB2188904A - Pair of light shielding film cases for surveillance camera - Google Patents
Pair of light shielding film cases for surveillance camera Download PDFInfo
- Publication number
- GB2188904A GB2188904A GB08608907A GB8608907A GB2188904A GB 2188904 A GB2188904 A GB 2188904A GB 08608907 A GB08608907 A GB 08608907A GB 8608907 A GB8608907 A GB 8608907A GB 2188904 A GB2188904 A GB 2188904A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- cases
- light
- spool
- shielding film
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/28—Locating light-sensitive material within camera
- G03B17/30—Locating spools or other rotatable holders of coiled film
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/26—Holders for containing light sensitive material and adapted to be inserted within the camera
- G03B17/265—Holders for containing light sensitive material and adapted to be inserted within the camera specially adapted for motion picture film, e.g. cassettes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Cameras Including Film Mechanisms (AREA)
Abstract
A pair of light-shielding film cases 10, 20 of similar construction, such as may be used in a surveillance camera, accommodate a film supplying spool 13 on which a film 1 has been wound and a film winding spool 23 on which the film is taken up. At least one roller 4 is provided in each of the film cases.The film cases 10, 20 each have a cover 12, 22 and a winding knob 17, 27 the latter also serving as a spool bearing and being mounted on a respective one of the covers. <IMAGE>
Description
SPECIFICATION
Pair of light shielding film cases for surveillance camera
The present invention relates to a film magazine for use mainlyfora surveillance camera such as may be used in crime prevention, and more particularly to a pairof light-shielding film casesofsimilarconfiguration which accommodate a film supplying spool and a film winding spool, respectively.
In general, a surveillance camera uses a film supplying spool and a film winding spool, that is, a spool on which unexposed film has been wound and an empty spool are loaded on the film supplying side and the film winding side of the camera using lightshielding members.
The light-shielding member may be a pairoflight- shielding cases of similar configuration which accommodate a film supplying spool and a film winding spool, respectively. The film cases may be of the same construction as a 135film cartridge (JIS K7519) ora70mmfilm magazine.
Figure lisa plan viewshowing a pairoflightshielding film cases in a surveillance camera. The film cases are similar in construction to conventional cases. Figure 2 is a sectional view taken along a line Il-Il in Figure 1.
Afilm supplying light-shielding film case 40 has a film case body 41 and a cover 42 detachably mounted onthefilm case body 41, and a film winding lightshielding film case 50 includes a film case body 51 and a cover 52 which are similar in configuration to the film case body 41 and the cover 41 of the film supplying light-shielding film case 40 and 50, respectively. The spool 43 and 53 have respective square holes 44 and 54 at their center which are engaged with the film winding shaft 45 and 55 of the camera 61 to run the film 62. A picture is taken with a lens 63 with the film set between a rail surface 64 and a pressure plate 65.
In the camera thus constructed, the film 62, after passing through a light-shielding member 56, is abruptly bent and wound on the spool 53 inthefilm winding light-shielding film case 50, as a result of which the film 62 is greatly strained. Accordingly, the camera suffers from the difficulties that the winding torque is high,thefilm is easily scratched or dam aged, and thefilm can be unintentionally exposed to light.
It is an object to this invention to reduce orelim- inane this difficulty.
According to this invention, there is provided a pairof light-shielding film cases for a surveillance camera orthe like which are similar in configuration to each other and accommodate a film supplying spool on which a film has been wound and afilm winding spool on which said film, supplied from said film supplying spool, iswound,wherein atleastone roller provided in each of said film cases.
In the prior art arrangement described above, in ordertojointhefilm case bodies 41 and 51 andthe covers 42 and 52, it is necessary to use some fixing arrangement.
Preferably, in the present invention said roller provided in each of said light-shielding film cases is provided with meansforfixing said rollerto a cover of its respective light-shielding film case.
In the prior art arrangement described above, in orderto mountthe light-shielding film cases 40 and 50 on the camera, it is necessary to provide a positioning member on the camera.
Conveniently, in the present invention, one of protrusions and recesses is formed on the bottoms of said film cases to position said film cases on said camera.
In the prior art arrangement described above, in order to stretch the film tight in the cases, it is necessary to additionally provide a winding member.
Conveniently, in the present invention, said light shielding film cases each include a coverand awind- ing knob, said winding knob also serving as a spool bearing and being mounted on a respective one of said covers.
This invention will now be described in more detail, by way of example, with reference to the drawings in which:
Figure lisa front view showing a pair of con- ventional light shielding film cases;
Figure2 is a sectional view taken along a line II - II in Figure 1; Figure3is afrontviewshowing a pairoflight shielding film cases according to the invention;
Figure 4 is a sectional viewtaken along a line IV - IV in Figure3; and
Figure5is a frontviewtaken along a lineV-Vin
Figure 3.
As shown in Figures 3 to 5, a film supplying case 10 and a film winding case 20 are similar in configuration to each other. The film supplying case 10 includes a case body 11 and a cover 12 detachably mounted on the case body 11. Similarly, the film winding case 20 has a case body 21 and a cover 22 detachably mounted on the case body 21. Thefilm supplying case 10 accommodates a film supplying spool 13 on which film 1 (not exposed) is wound, whilethefilm winding case 20 accommodates a film winding spool 23 on which one end portion ofthefilm 1 is wound.
The film winding shafts 14 and 24 of a camera 2 penetrate the bottoms of the case bodies 11 and 21 and engage the respective square holes 15 and 25 formed in the spool 13 and 23. The case bodies 11 and 21 have a pluralityoflegs 16 and a pluralityof legs 26 on their respective bottoms. The legs 16 and 26 engaged with recesses formed in the camera 2.
The same effects can be obtained byforming recesses in the legs and by providing protrusions on the camera.
In each of the case bodies 11 and 21, a roller 4 is provided which is rotatablyfitted on a roller shaft 3.
The roller shaft 3 has afemale-threaded part 5 at one end.
Winding knobs 17 and 27 are rotatably mounted on the covers 11 and 21, respectively. The ends ofthe knobs 17 and 27 are engaged with the square holes 15 and 25 of the spoois 13 and 23, respectively.
Each of the covers 12 and 22 has a fixing screw 6.
the fixing screws 6 are threadably engaged with the female-threaded parts 5 of the rollershafts 3to fixthe case bodies 11 and 21 to the covers 12 and 22, re spectively.
By arranging the legs 16 and 26 on the case bodies 11 and 22 at irregular intervals, the light-shielding film cases 10 and 20 can be held in placeonthe camera body 2 at all times. Afixing device (not shown) is provided to secure the light-shielding film cases 10 and 20 to the camera body 2.
The film supply spool 13 and the film winding spool 23 are stably and rotatably supported in the light shielding film cases 10 and 20 by means ofthe film winding shafts 14 and 24 and the winding knobs 17 and 27, respectively.
The unexposed film 1 fromthefilm 1 fromthefilm supplying light-shielding film case 10 is passed through a light-shielding member 18while being kept in contactwith the roller4, and runtothe gap between a rail plate 8 and a pressure plate 9 while being guided by a camera roller. After a picture is taken with the lens 31 of the camera, the film 1 passes through another light-shielding member 28 while being guided by a camera roller32and run into the film winding light-shielding film case 20 where the exposed film is wound on the spool 23 while being kept in contact with the roller4.
As described above, rollers are provided in the light-shielding film cases of the invention. Therefore, the film is run smoothly; that is, the above-described difficulties such as scratching of the film and light leakage are eliminated.
Furthermore, as the winding knobs, which serve also as bearings, are provided on the covers, the film can be stably run. The roller shafts, which are simple in construction, shield the film cases from light without having to provide fixing members.
Asthe legs are arranged irregularly on the case bodies, the positional relationship between the camera and the film cases is fixed. Accordingly, the difficulty of the operator erroneously loading the film cases in the camera is prevented.
Claims (5)
1. A pair of iight-shielding film cases for a sur- veillancecameraorthe likewhich aresimilar in con- figuration to each other and accommodate a film supplying spool on which a film has been wound and a film winding spool on which said film, supplied from said film supplying spool, iswound,wherein at least one roller provided in each of said film cases.
2. Apairoflight-shielding film cases as claimed in claim 1, wherein said light shielding film cases each include a cover and a winding knob, said winding knob also serving as a spool bearing and being mounted on a respective one of said covers.
3. A pair of light-shielding film cases as claimed in claim 1 wherein said rolier provided in each of said light-shielding film cases is provided with meansforfixing said roller two a cover of its respective light-shielding film case.
4. A pair of light-shielding fil m cases as claimed in claim 1, wherein one of protrusions and recesses is formed on the bottoms of said film cases to position said film cases on said camera.
5. A pair of light-shielding film casessubstantially as hereinbefore described with reference to, and as shown in, Figures 3 to 5 of the accompanying drawings.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8608907A GB2188904B (en) | 1986-04-11 | 1986-04-11 | Light shielding film case for surveillance camera |
| DE19863613169 DE3613169A1 (en) | 1986-04-11 | 1986-04-18 | LIGHT-SHIELDED FILM CONTAINER PAIR ARRANGEMENT FOR A SURVEILLANCE CAMERA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8608907A GB2188904B (en) | 1986-04-11 | 1986-04-11 | Light shielding film case for surveillance camera |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8608907D0 GB8608907D0 (en) | 1986-05-14 |
| GB2188904A true GB2188904A (en) | 1987-10-14 |
| GB2188904B GB2188904B (en) | 1989-12-28 |
Family
ID=10596064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8608907A Expired GB2188904B (en) | 1986-04-11 | 1986-04-11 | Light shielding film case for surveillance camera |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3613169A1 (en) |
| GB (1) | GB2188904B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1173366A (en) * | 1966-04-25 | 1969-12-10 | Ricoh Kk | Improvements in or relating to motion picture film cartridges |
| GB1556765A (en) * | 1976-04-09 | 1979-11-28 | Itek Corp | Carridge-like device dor advancing and withdrawing a prededetermined length of film to and from a camera |
| GB1559092A (en) * | 1976-02-13 | 1980-01-16 | Linotype Paul Ltd | Take up mechanism and casette for strip material |
| EP0102250A2 (en) * | 1982-09-01 | 1984-03-07 | Xerox Corporation | Mechanisms for providing drag during unwinding of tapes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE651388C (en) * | 1935-10-12 | 1937-10-13 | Lampen Und Metallwarenfabriken | Film cassette |
| DE2430965A1 (en) * | 1974-06-27 | 1976-01-08 | Lu Shui Ting | FILM TAPE CASSETTE |
-
1986
- 1986-04-11 GB GB8608907A patent/GB2188904B/en not_active Expired
- 1986-04-18 DE DE19863613169 patent/DE3613169A1/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1173366A (en) * | 1966-04-25 | 1969-12-10 | Ricoh Kk | Improvements in or relating to motion picture film cartridges |
| GB1559092A (en) * | 1976-02-13 | 1980-01-16 | Linotype Paul Ltd | Take up mechanism and casette for strip material |
| GB1556765A (en) * | 1976-04-09 | 1979-11-28 | Itek Corp | Carridge-like device dor advancing and withdrawing a prededetermined length of film to and from a camera |
| EP0102250A2 (en) * | 1982-09-01 | 1984-03-07 | Xerox Corporation | Mechanisms for providing drag during unwinding of tapes |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2188904B (en) | 1989-12-28 |
| DE3613169A1 (en) | 1987-10-22 |
| GB8608907D0 (en) | 1986-05-14 |
| DE3613169C2 (en) | 1988-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930411 |