US2370434A

US2370434A - Film holding clip

Info

Publication number: US2370434A
Application number: US470713A
Authority: US
Inventors: Harry S Wolf
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-12-31
Filing date: 1942-12-31
Publication date: 1945-02-27
Anticipated expiration: 1962-02-27

Description

Feb. 27, 1945. H. s. WOLF 2,370,434

FILM HOLDING CLIP Filed Dec. 31, 1942 INVENTOR HARRY 5. WOLF ETTOR N EY Patented Feb. 27, 1945 UNITEDv STATES PATENT OFFICE FILM HOLDING CLIP Harry-S. Wolf, Brooklyn, N. Y.

Application December 31, 1942, Serial No. 470,713

4 Claims.

struction and will operate in an efiicient manner for its intended uses.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elementsand arrangement of parts which will be exemplified in the construction hereinafter described and of which the scope of application will be indicatedin the appended claims.

In the accompanying drawing in which there is shown one of the various possible embodiments of this'invention,

Fig. l is an elevational view of a film holder including a film holding clip embodying my invention and illustrating themanner of supporting a film thereby;

Fig. 2 is a cross-sectional view taken substantially along the line 2-2 of Fig. 1;

Fig. 3 is an enlarged cross-sectional view taken substantially along the line 33 of Fig. 1, being illustrative of the construction and operation of one of the clips employed to engage and hold an edge of a photographic film;

Figs. 4 and 5 are cross-sectional views taken along the lines 4-4 and 55, respectively, of Fig. 3; and

Fig. 6 is an exploded view of one of said clips.

Referring now in detail to the drawing, I have there disclosed a photographic film holder l0 comprising a longitudinal cross-bar l2, having attached thereto a U-shaped frame, including a pair of parallel arms I4, l6 interconnected by an integral bottom bar 18. The several bars and arms are preferably made of metallic material, the bar I2 being substantially rectangular in cross-section and the bar 18 and arms I4, 16 being preferably circular in cross-section. The arms 14, Hi of the U-shaped frame are provided with reduced

upper ends

20, 22, respectively, which pass through corresponding apertures in the bar I2 and are swedged thereover to hold the U-shaped member rigidly in assembled relationship on the bar I2.

For supporting a. photographic film F on the holder N, there are provided a pair of symmetrically disposed spaced resilient members 24 each preferably integrally formed from fiat metallic stock. Each member 24 comprises a horizontal portion 26 contactively underlying the bottom surface of the cross-bar 12, an integral obliquely-depending portion 28 and a second horizontal portion 30, the

horizontal portions

26 and 30 being at opposite ends of the oblique portion 28.. The lower horizontal'portion 30 is twisted soas to lie at right-angles to the planes in which the

portions

26 and 28 are disposed. Each of the resilient members 24 is rigidly attached to the cross-bar l2 by a plate 32 underlying the upper horizontal portion 26 and permanently attached to the cross-bar l2 by a pair of rivets 34 passing through the cross-bar l2, the upper horizontal portion 26 and the plate 32. The material of the members 24, while relatively rigid, possesses a degree of resilience sufiicient to move them back i from the full line position, shown in Fig. 1, to

their normal dotted line position illustrated inthis figure. This movement is curvilinear and takes place about the end of the upper horizontal portion 26 adjacent the oblique portion 28.

Each of the lower twisted horizontal portions 30 supports a clip 36 constructed in accordance with the invention. Said clips comprise three essential elements, to wit, a fixed lever member 38, an oscillatory lever member and a biasing member 42.

The fixed lever member 38 comprises a sheet metal plate 44, having a grooved end 46 which is welded to a ridge in the horizontal portion 30' of a clip support. The opposite end of the plate 44 is provided with an aperture 48.whose function will soon be apparent. A pair of parallel upstanding ears 50 are integrally attached to the lateral edges of the plate 44, each of said ears being provided with tangs 52 which extend in alignment parallel to the plate 44 and towards the center thereof. These tangs serve as the pivot for the oscillatory lever member 40.

The oscillatory lever member 49 includes a sheet metal plate 54, having a right angled flange 56 extending from its forward end. The free end of the flange 56 has twopoints 58 disposed at its outer ends and a central point 63!, which is in alignment with the aperture 44 when the two lever members are assembled. The two lateral points 58 are lower than the central point 69 so that when said lateral points are pressed against the plate 44, of the fixed lever member, the central point passes through the aperture 48. The oscillatory lever member 40 is also provided with a pair of parallel upstanding ears 62 which are integrally connected to the lateral edges of the plate 54. These ears are slotted to form a retroverted passageway 64, having a p rtion thereof opening on the free edge of an ear 62, a portion running substantially parallel to the plane of the plate 54 and a retroverted portion running from the last mentioned portion toward, but not up to, the free edge of the ear. This last mentioned portion serves as the bearing portion. Said bearing portion is of suflicient size to freely accommodate the tangs 52. The ears 62 on the oscillatory lever are spaced apart less than the cars 50 on the fixed lever by an amount substantially equal to the thickness of a pair of said ears whereby to pre vent shifting of the lever members axially of the tangs. Finally, the plate 54 is provided with a locating tang 66 which serves to fix the biasing member 42.

This biasing member is a V-shaped leaf spring having an aperture 68 at one end thereof which is adapted to receive the locating tang 66. When the lever members and biasing member are assembled, the biasing member will urge the points 58, 6!] on the oscillatory member towards the fixed:

member 38 and to the normal position shown in Figs. 3 and 4, wherein the central point 66 passes through an edge portion of the photographic film F and the lateral points 58 are adjacently embedded in said film.

To assemble the clips 36, the biasing member 42 is first placed on the oscillatory member 40 with the tang 66 in the aperture 68. The other end of the biasing member is then placed against the plate 44 between the ears 56 and the biasing member compressed. At the same time the tangs 52 are introduced into the passageway 64. The oscillatory member is then shifted to force the tangs 52 through the passageways 64 up to the bearing portions. This completes assembly of the clip 36.

Four clips 36 are provided, two of which have already been mentioned, these being the ones which are attached to the resilient supports 24. The other two clips 36 are welded to the bottom bar It of the U-shaped frame.

Both the

plates

44 and 54 of the fixed and

oscillatory lever members

38, 40 are provided with raised ribs H1 to reinforce the same.

In attaching a film to the holder I 0, the bottom edge of the film may first be gripped by the clips 36 attached to the bottom bar l8, after which the upper resiliently supporting clips are brought down from their normal dotted line position to the full line position shown in Fig. 1, wherein they are caused to grip the upper edge of the film.

Upon release of these upper clips a tension will be produced in the film by the tendency of said clips to be restored to their original dotted line position, thus keeping the film in flat unwrinkled position.

The cross-bar i2 is preferably made of such length as to extend considerably beyond one of the arms I6 in order to provide a portion for convenient handling.

It will thus be seen that there is provided a clip which achieves the several objects of this in vention and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention I claim as new and. desire to secure by Letters Patent:

1. A film holding clip comprising a pair of sheet metal lever members, one of which has an aperture therein and the other a pointed portion adapted to enter said aperture when the clip is closed, one of said lever members further having a pair of parallel upstanding ears which have registered retroverted passageways therein, each opening on a free edge of an ear, pivot means supported by the other of the members and received in the retroverted portions of the passageways, and resilient mean to bias the lever members to closed position.

2. A film holding clip as set forth in claim 1 wherein the pivot means comprises a pair of parallel upstanding ears on the other of the members having axially aligned tangs struck therefrom.

3. A film holding clip as set forth in claim 1 wherein the pivot means comprises a pair of parallel upstanding ears on the other of the members having axially aligned tangs struck therefrom. and wherein the resilient means comprises a flat hairpin spring and means to prevent shifting of said spring relative to the lever members.

4. A film holding clip as set forth in claim 1 wherein the pivot means comprises a pair of parallel upstanding ears on the otherof the members having axially aligned tangs struck therefrom, one of the pairs of ears being spaced apart further than the other of the pair of ears a distance substantially equal to the thicknes of the more closely spaced ears whereby to prevent shifting of the lever members axially of the tangs.

HARRY S. WOLF.