US2738586A - Measuring device for dark room film cutters - Google Patents

Description

L. SASSE March 20, 1956 MEASURING DEVICE FOR DARK ROOM FILM CUTTERS Filed Sept. 12, 1952 INVENTOR Lo w: SASSE'.

ATTORNEYS United States PatentO munnsonnvrcnronnamcnoomnmm CUTTERS p r Louis 'Sasse, Hammond, Ind. V September 12, 1952, Serial.No.- 309,2241 2'Claim s. or, 33-8 1)-- j Thijsl 'invention relates to'fi'lm cutting devicegand more partfcularly to. an improved gage device which is suitable film from a film strip; the improved cutterbeing simple ineonstruct'ron, beingeasy to manipulate, and being; readilyefldjustablectto provide a desired length of cut, in: aceord'ance with: the size of. the. negativeom a filIIlJSHTlP.

: further object ofthe invention to provi'd'elan imprcivedfitfiinr cutting. board. provided: with-readily 's'ett'ahle stfbp me'anseagainsc which theend of a'st rip ofifilm may he heldXto'iprov-ide adesired length-of cut, thexdevice inexpensive to manufacture, being durablesin conbeing easy to operate, and being especially usef'ulu in dark rooms where the degree of illumination is insulfici'ent to provide easyreadin-g ofi'th'e numbers ona measuring scale. A i i a Further objects and advantages of the invention will become apparent 'from' the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is a fragmentary perspective view of an improved film cutting board constructed in accordance with the present invention.

Figure 2 is an enlarged fragmentary top plan view of the guide portion of the adjustable stop bar of the improved film cutting board of Figure 1, showing its engagement on a portion of the guide rai1, a portion of the structure being broken away to reveal interiordetails thereof.

Figure 3 is a cross sectional view taken on the line 3-3 of Figure 2.

Figure 4 is a transverse verticalcross sectional view taken on the line 4-4 of Figure 3.

Referring to the drawings, the film cutting board is designated generally at 11 and comprises a generally rectangular main body 12 which may be provided on its top surface with the usual coordinate lines 13 and which has secured to one marginthereof the steel shearing strip 14. Pivotally connected in a conventional manner at 15 to the corner portion of the board 12 for rotation shearingly past the stationary shear strip 14 is the cutting bar 16, said cutting bar being provided with the conventional cutting blade 17 which is shearingly cooperative with the stationary shear strip 14.

Secured to one marginal portion of the board 12 at right angles to the shear strip 14 is a supporting strip 18 on which is secured a wider strip 19, thus defining a generally T-shaped guide rail extending at right angles to the plane of rotation of the cutting bar 16. Slidably engaged on the guide rail thus defined is the channeled member 20 to which is secured the elongated fiat stop The channeled slide member 20 is provided with the lge I .P atent'ed M 20,1956

12: depending grooved outer flange 21' which receives the outer edge of'th'e 19; asshown in; Figure 4, the slide m'ember being also grooved to receive theiinner edge of said strip 19, as shown, the fiange'21'" being provided with the thumb. set screw 22' which is clfampingly engageabl'ewith the edge of strip I9to lock the slide member 20v in adjusted position on the guide rail.

The guide rail is formed with respective. rows of apertures 23, 24 and' f2'5 and with the marginal inch scale 2'6; The longitudinallyhaligned' outer apertures 25 are transversely ali'gned with. the half inch marks of the inch scale 26;, the longitudinally. alignedfintetmediate apertunes 24' are. transversely aligned with; the inch marks oi the inch, scale 26,, and the inner longitudinally aligned aperturesv 23! are: transversely, valigned. with the quarter inch marks of the inchscale26.. Designated at '27 is, a spring. armwhich is pivotally connected at.one end as indicatedtat 28 to the-rear: portion oi the slide member 20 for. movement about a vertical, axis, the pivotal connectiont28i overlying,-the:.strip19.. Secured to. the free end. of the: spring arrnj'l islthetdepending detent pin 29 which extends throughsthe spring arm 2 7 and, which has tl-treadedly I secured to the top endv thereof} thehandle 30. The-slide; member 204s fonmedwithvthree apertures 31, 32. and133'which arerespeetively registrablel with the longitudin-al-l-y aligned-L apertures 25,; 24 andv 23, and the detent- ,pin. 29- is locatedso as to hesseleetively insertable intany one ofitheapertures. 31,32, or 33,.whereby said detent pin may be engaged in any one of theapertures 25, ,,24 or It isthus possibletotaxijustably secure the stop -bar 21 in .any desired. position along. the strip 19 at. ,quarter inch intervals. al'ongfitheuinchescale 26 by engagingpthe detent pin. 29-through, one; of the apertures 31,32 or 33 with the ' selectedtaperture 25, 24, or 23. When the desired adjustment oftt he stop bar 21 has been thus made, t'he top bar may he rigidly locked in its adjusted position by tightening the thumb set screw 22' in the manner above described to clamp the slide member 20 to the strip 19.

In using the device, the stop bar 21 is set to its proper position, in accordance with the length of the negative on the strip of film to be cut, and the strip is then positioned with its end abutting the straight edge 22 of the stop bar 21. The cutting arm 16 is then moved downwardly to shear oil the desired length of film strip, and then said cutting arm israised, whereby the film strip may be pushed inwardly until the previously severed edge is placed in abutment with the straight edge 22 of the stop bar 21, whereupon the cutting operation may be repeated. When a film strip of diflferent negative length is to be cut, it is merely necessary to release the clamping screw 22' and to readjust the position of the stop bar by elevating the handle 34) and moving the slide member 20 to a new position, in accordance with the length of the negative to be cut, the stop bar being thus movable in quarter inch intervals or in multiples of quarter inch intervals by suitably'positioning the detent pin 29 in selected ones of the apertures 31, 32 and 33, or in the re quired sequence of saidapertures to measure off the desired increment of movement of the stop bar 21. It will be readily apparent that the readjustment of the stop bar 21 may be accomplished without the necessity of viewing the inch scale 26, since the increments of distance may be mechanically selected and measured off by moving the slide member 20 until it becomes locked by the descent of the detent pin 29 into one of the apertures 23, 24 or 25, in accordance with the setting of the detent pin 29 in one of the apertures 33, 32 or 31 of the slide member 20. Therefore, the stop bar 21 may be adjusted in the dark room at any time to provide any desired length of cut on a strip of film.

While a specific embodiment of an improved film cutting device has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. A measuring device for dark room film cutters comprising a board, a supporting strip arranged in superimposed relation with respect to the board and extending along one end adjacent the edge thereof and secured to said board a wider strip carried medially of its width on said supporting strip longitudinally thereof above and parallel to said board to define a T-shaped guide rail, said wider strip having a row of spaced apertures extending longitudinally therealong intermediate the side edges thereof, a slide member provided with grooves complementarily formed to said guide rail whereby said member is mounted on said guide rail for longitudinal sliding movement therealong, said slide member being provided with an aperture registrable with an aperture of said row of spaced apertures, a stop bar positioned perpendicularly with respect to said guide rail and connected to said slide member for movement therewith, a spring arm arranged above and connected at one end to said slide member, and a detent pin projecting from the other end of said arm insertable into and withdrawable from the aperture in said slide member and a registering aperture of said row of apertures when the slide member has been moved on said guide rail so that its aperture is in registry with one of the apertures of said row in said wider strip.

2. A measuring device for dark room film cutters comprising a board, a supporting strip arranged in superimposed relation with respect to the board and extending along one end adjacent the edge thereof and secured to said board, a wider strip carried medially of its width on said supporting strip longitudinally thereof above and Cir parallel to said board to define a T-shaped guide rail, said wider strip having a plurality of spaced rows of equally spaced apertures with the apertures in each row arranged in longitudinal spaced relation therealong intermediate the side edges thereof and the spacing in each row dilferent than the spacing in the other rows, a slide member provided with grooves complementarily formed to said guide rail whereby said member is mounted on said guide rail for longitudinal sliding movement, said slide member being provided with a plurality of spaced apertures arranged transversely thereof with one aperture in registry above one of said rows of apertures, a stop bar positioned perpendicularly with respect to said guide rail and connected to said slide member for movement therewith, a spring arm arranged above and pivotally connected at one end to said slide member for movement about a vertical axis, and a detent pin projecting from the other end of said arm insertable into and withdrawable from one of said apertures in said wider strip and a registering aperture of one of said rows when the slide member has been moved so that said one of its apertures is in registry with one of the apertures of one of said rows.

References Cited in the file of this patent UNITED STATES PATENTS 121,026 Briesen Nov. 14, 1871 419,640 Class Jan. 21, 1890 1,123,191 Hastings Dec. 29, 1914 1,172,127 Friteh Feb. 15, 1916 1,270,823 Hoefle et al. July 2, 1918 1,362,635 Muller Dec. 21, 1920 1,410,481 Landon Mar. 21, 1922 1,864,341 Davie June 21, 1932 1,872,860 Winter Aug. 23, 1932 2,242,286 Boughton May 20, 1941 2,530,437 Marks Nov. 21, 1950 FOREIGN PATENTS 59,774 Austria June 25, 1913

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