Abstract: The present invention relates to an apparatus for cutting motion picture film negatives. The improvements in the present invention film cutting apparatus enable the film cutter to cut the motion picture film negative with a precise, even, clean cut at a location mid-way between adjacent frames of film footage. This is necessary when using a new technique of negative cutting and splicing that allows no frame loss and still maintains all of the requirements of professional (state of the art) motion picture film processing. This has never before been done. The improvements include individual film seating plates which press the lengths of motion picture film to be cut against individual film support and ejection plates to assure that the lengths of film are securely held prior to and during the cutting operation. The present invention also provides safety features to assure that the operator will not accidentally cut himself during the operation.

Abstract: A saw blade guard for a table saw or the like includes a flat blade guard arm which is coplanar with the circular cutting blade and has a thickness no greater than that of the blade. The guard includes a yoke portion mounted on a bearing on the blade arbor below the table such that the yoke is allowed to rotate independently of the rotation of the arbor. The guard arm is semicircular in shape and extends through the kerf in the workpiece produced by the saw blade and down through the blade slot in the table to a point adjacent the yoke. The yoke includes a radially radial extension which supports the arm below the table. A roller mounted on the outer free extremity of the guard arm above the table is engaged by the leading edge of the workpiece and forces the arm to rotate a sufficient amount to expose the workpiece to the blade.

Abstract: A noise damping guard for a circular saw blade of the type mounted for axial rotation relative to a material support plane disposed transverse to the cutting axis of the blade. The guard comprises a stationary lower guard section secured beneath the support plane and a pivoted upper guard section secured above the support plane. Each guard section comprises a guard frame supporting an inner pair of anti-friction metal plates secured in parallel-spaced relationship to one another to receive a saw blade therebetween and define an air gap between each side of the blade and an inner face of the metal plates. A spacer plate and a backing plate is secured to an outer face of each of the metal plates to prevent the vibration of the inner anti-friction metal plate and to provide an additional noise barrier and still further to maintain the metal plates in alignment. A pivoting support arm is secured to the guard upper section for upward displacement of the guard upper section.

Abstract: A hood-like saw blade guard for a radial arm saw is mounted for free vertical movement on a support frame detachably connected to the suspended saw blade driving motor housing. The guard extends over the entire saw blade when in its downward position and is contoured on both sides so as to be easily elevated upon contact with a workpiece, one contoured side is closed and offset radially from the saw blade to provide a sawdust chute and permit vertical removal of the guard from the frame. A spreader with an anti-kickback device thereon is mounted for vertical adjustment on the frame and guards the open contoured side, and vertically adjustable hold-down means on the frame variably limits vertical upward movement of the guard so as to hold down a workpiece when ripping.

Abstract: A work table for use with a chain saw comprises a flat-topped work surface having a slot defined therein through part of which an elongate member of a pivotal carrier unit extends uprightly and is movable longitudinally therein. The member has in vertical spaced relation to extend from the same side thereof, parallel to and above and below the remaining part of the slot respectively a chain saw guard and a chain saw mounting bracket. The outer end of a stationary link arrangement is to engage around the throttle of a chain saw. With a chain saw fitted with its cutter bar extending upwards through the slot parallel to the member and clamped in mounting bracket, the throttle ready to be engaged and chain saw energized, movement of a workpiece to be cut against the chain saw mill move the pivotal unit with the chain saw about its pivot to cause the throttle to be depressed to activate the blade of the cutter bar.

Abstract: A circular saw having a cantilever beam 12 which is adapted to be lifted and on which a sawing carriage including a saw blade 2 is guided for horizontal movement, comprises a sound protection hood 5 adapted to be lifted together with the cantilever beam 12. At its lower edge the sound protection hood 5 has a flexible crush-proof apron 49 which is made of a sound dampening flexible material and enters into sound-proof engagement with the table top 8 of the circular saw when the cantilever beam 12 with the sound protection hood 5 are lowered into the operating position. Hold down devices 40, 41, 42 mounted on the sound protection hood firmly hold the material 7 to be sawed on the table top 8 during the sawing process by means of strips 55, 72 which are of sound dampening material. The hold down devices are guided in parallel by a parallel guide means including racks and pinions so as to be biased "passively" with respect to the sound protection hood 5 by means of pneumatic cylinders 43.

Abstract: A rounded food article, such as a tomato is quickly sliced into a number of slices by a manual device with a rack of parallel spaced tensioned blades mounted to the base at an acute angle. A transversing carrier assembly slides along guide rods in the base. The carrier assembly has a carrier plate and carrier fingers which are a parallel array of planor segments mounted above and parallel with the carrier plate and intermesh with the blade rack. The food article is placed on the carrier plate and carried through the blade rack by the movement of the carrier plate and fingers, thereby slicing the tomato into a number of slices. A guard mounted on the base shields the sharp edge of the blades. With the carrier in the open position the rack of blades in combination with the carrier fingers and guard creates a vertical cavity in which the food article to be sliced is inserted.

Abstract: A plastic film dispenser comprising a support structure consisting of a housing (1), support means (26) for a roll of film, guide means in the form of a fixed flap (36) and a moveable flap (37) to guide film from the roll to an outlet (27). The housing is provided with a drop plate (34) moveable from a position where film being withdrawn is maintained clear of treated film severing means (41) to a position where film is contacted by the severing means. The housing preferably includes means (25) to support a roll of other material and a keeper rod (18) whereby a length of such material may be conveniently withdrawn from the roll and severed by severing means (12).

Abstract: A safety boot assembly for use with a press brake operated C-frame punch or the like tool which fits between the ram of the press and the upper arm of the C-frame to prevent a human limb from being inadvertently placed in any gap between the ram and C-frame. The disclosed assembly includes a corrugated boot and end fittings to attach its ends to the ram and C-frame.

Abstract: Protection device adapted for use with a vertical blade cutter comprising a cutting blade. The device comprises a moveable plate for covering the blade and protecting against accidental contact with the blade. The moveable plate is adapted to be retracted during cutting and is further adapted to be otherwise lowered in front of the blade. A bar is provided which is adapted to slide in a guide adapted to be attached to the cutter. The moveable plate is mounted on the bar. A plate support is journaled onto the guide. A rotatable wheel is attached to the plate support. The rotatable wheel, when brought into contact with the bar while rotating, is adapted to raise the bar and moveable plate and whereas disengagement of the wheel from the bar causes the moveable plate to be lowered in front of the blade by virtue of its own weight and that of the plate.

Abstract: A guarded tomato slicer has a sharp rack of blades mounted substantially diagonally across a table with a loading area disposed between a retracted pusher and the sharp edges of the blades. A swinging vertical gate is mounted in front of the loading area on a vertical pivot adjacent the rack of blades. The gate is resiliently poised in front of the loading area. The gate and pusher are short enough to clear each other when a tomato is pushed into the loading area against and through the swinging gate, which covers the sharp edges of the rack of blades to guard them. The swinging gate has an apertured roof to shield the top of the loading area. As deflectable outer segment of the roof has a projection which provides an outward limit of travel for the swinging gate and is deflectable to permit removal of the swinging gate. The pusher is mounted on a pair of horizontal slide rods connected to the top of the rack having lower extensions which extend downwardly together to provide a support foot.

Abstract: A metal cleaning shear is provided for shearing metals and other material wherein there is provided a rocking pivoted beam, a pivotally mounted guard, hydraulic cylinder means, cutting blades, and a control for the hydraulic means and machine.

Abstract: A guard for moving-blade cutting instruments, for instance band-saws and band-knives. The guard is in the form of a comb or other toothed member, mounted alongside the blade and vibrated cyclically so that the tips of the teeth lie proud of the cutting edge at least once per cycle. The clearances between the teeth are aligned so as to facilitate access of piles of cloth or the like to the blade, but the bulkier fingers of the operator should be struck by the tips of the vibrating comb and repelled before being seriously cut, or cut at all, by the blade. The guard may be mounted to yield within limits, so as to increase the exposure of the blade, when subjected to sustained pressure from approaching work.

Abstract: Apparatus for supporting and operating a chain saw, including a table for supporting wood to be cut and an elongated actuating arm mounted on the table.

Abstract: A circular saw, the saw blade of which is adapted to be moved horizontally across a table at a horizontally movable carriage or slide and to be lifted into a position above the material to be sawed comprises a horizontal cantilever beam one end of which is guided by a vertical guide means at a single vertical support member and the other end of which is unsupported and therefore offers free access for handling of the material to be sawed or sawed, respectively, and for controlling the saw movements from a space adjacent said other end.

Abstract: A protective device for a band saw machine is secured to the guards which are normally found on such machines. The device extends downwardly from the guards to the plane of the table, on which the blocks to be cut are placed. The device encloses the band saw and prevents inadvertent contact therewith. The device comprises two members, a fixed member secured to the guard and a movable member secured to the fixed member. The movable member is locked to the fixed member. When a block contacts the device the movable member is released until the block has been cut. The movable member returns to the locked position after the block has been cut.

Abstract: A lower guard assembly for both sides of the blade, which retracts a minimal amount while cutting, providing a maximum of blade enclosure and consequent protection for the operator.

Abstract: A bacon slicing machine wherein the product is placed onto the exposed horizontal supporting surface of a table which is movable between an extended and a retracted position. The front portion of the table overlies the cutting edge of the knife and the apex of a rotary feeding wheel in the extended position of the table to thus prevent injury to the hands of an attendant. A spring biases the table to the extended position, and a bar is provided at the rear end of the table to be depressed by the hips of an attendant standing behind the table in order to move the table to the retracted position in which the product can be pushed along the supporting surface, along an upwardly or downwardly inclined platform which forms part of the front portion of the table, and into the range of the feeding wheel. The supporting surface of the table and the cutting plane of the knife make an acute angle of between 15.degree. and 50.degree..

Abstract: The present trimming apparatus is capable of trimming the margins of three-dimensional workpieces with the aid of strip steel knives which are driven, preferably by pneumatic piston cylinder means in any desired direction. The workpiece such as the dashboard of a car, is held on the outside thereof by a workpiece support which has such a shape and cut-outs that the strip steel knives may be moved through the workpiece support. A counter-holder presses the workpiece against the outer support. In this combination of elements the workpiece may be trimmed from any direction from its outer side inwardly. The trimming tools may be operable in sequence and may also be supported on a carriage which shuttles back and forth between a trimming station and a loading and unloading station. Power savings may be in the order of 90% as compared to the power requirements of conventional stamping tools.

Abstract: A motor operated power saw is mounted on a table by employment of a tiltable platform so that the saw is lowered to cutting position by manually depressing a handle. Surrounding the upper half of the saw blade is a composite guard consisting of a main guard and a movable nose guard which, when the blade is in elevated non-operating condition, cover the exposed portion of the blade. The main guard is pivotally mounted on the tiltable platform and is provided with a cam follower which, upon engagement with a cam track on the table, automatically elevates the main guard and accompanying nose guard as the blade is advanced through a cutting operation.

Abstract: A pedagogic sealing apparatus for seaming thermoplastic layers includes a sealing station and a trimming station. The sealing station includes a movable platen jaw which compresses the layers against a fixed jaw. Current flow through a resistance ribbon in the fixed jaw elevates the temperature of the layers to provide a fused seam between the layers. An indicator is provided to apprise the student of the termination of a preselected duration heating pulse and the commencement of a cooling cycle. The platen jaw is heated by a resistance ribbon optionally actuated conjunctively with the fixed jaw ribbon to seal layers which require additional heat to fuse their interface.

Abstract: A safety guard structure for protecting personnel from injury while operating a machine such as a punch press. The guard member is supported at three points for vertical movement between upper and lower positions. At two upper points the guard is supported on rollers which roll on vertically extending parallel guides and at one lower point the guard is centrally supported on the lower end of a vertically extending rod slidable in fixed bearings. The resulting structure is not only economical to build but gives optimum guiding effect for the guard. The embodiment disclosed permits the entire guard structure to be swung outwardly to a position permitting access to the machine above the protected area.

Abstract: A guard barrier in front of the exposed portion of the blade of a band saw is raised or lowered responsive to the elevation of the portion of the non-planar workpiece which is approaching the blade to be cut so that the varying length of exposed blade is continuously guarded without interfering with the cutting operation. A pneumatic cylinder controls the position of the guard barrier. Cam followers at the bottom end of the barrier ride along the uneven surface of the workpiece acting as a cam and follower movements operate a throttle valve which controls the pressure in the pneumatic cylinder to cause the barrier to move to and hover at its guarding location. An auxiliary valve is provided for rapid raising of the barrier to accommodate a steep rise on the workpiece, to broaden the range of useful operation in relation to workpiece profiles, and for manually controlled lifting of the guard.An electric system is coordinated with the pneumatic system to provide control and safety features.

Abstract: A retractable blade guard which protects the operator from the blade of a rotary saw or other cutters. The guard includes two moveable cam-action guard sections of similar design mounted on the opposite ends of a conventional hood guard. Each section includes an obverse leaf rigidly connected to a reverse leaf by a rod and a guard extension. Each guard section moves independently of the other. The guard section rides up, onto and on top of, and down over the fence or the stock as it is being cut in either direction during cross-cutting, mitering or ripping, yet provides optimal coverage of the blade in the cutting zone.

Abstract: A safety means for a skinning and/or slashing machine having a frame means with a skinning blade means mounted thereon which provides skin from the meat product to be skinned as the meat product is moved therepast. A plurality of spaced apart slashing blades are rotatably mounted on the frame means adjacent the skinning blade means and are adapted to slash the meat product to permit the inspection thereof. The blades are supported by a pair of support arms which are pivotally connected to the frame means so that the blades may be moved upwardly away from the skinning blade means. A first normally closed switch means is provided on the frame means and is adapted to deactivate the machine power supply when the support arms are pivotally moved to their raised positions. A transparent safety shield is secured to the support arms and extends over the blades. An inverted U-shaped safety guard extends over the feed conveyor to prevent the machine operator from extending his hands too far towards the skinning blade.

Abstract: A band saw which has a displaceable guard rail that covers the saw blade in the cutting region thereof above the feed table and is adapted to be displaced upward in a direction parallel to the saw blade and away from the feed table to the height necessary to allow passage of the stock that is being cut. The band saw includes apparatus for raising the guard rail the necessary height in response to exerting pressure by the stock against the guard rail in the direction of cutting, and the apparatus will then maintain the guard rail at a height conforming to the contour of the stock as the latter is passed through the saw blade. Other apparatus provides smooth movement of the guard rail during cutting operations and provides for securing of the guard rail when the band saw is not in operation.

Abstract: A saw guard for a circular saw having a saw blade and a work piece holder which moves relative to the saw blade to cut the work piece, the saw guard being mounted on the leading edge of the work piece holder and having means for moving the saw guard into a shielding position adjacent the cutting edge of the saw blade while the work piece holder is in a restocking cycle.

Abstract: Safety apparatus for a press or the like having dies which are movable relative to each other and which define an open area therebetween for receiving an article includes a gate that is pivotable about a primary pivot axis from an open position to expose the open area to a closed position to shield the open area, and a secondary pivot axis that is parallel to and spaced from the primary axis. In the closed position, the gate engages a normally closed switch means and thereby enable the dies to move towards each other. When the gate is in the closed position and an obstruction is aligned with the gate, movement of the dies causes the obstruction to contact the gate which is pivoted about the secondary pivot axis, whereby the switch means closes and movement of the dies is interrupted.