Abstract: A freestanding one-piece shelter for young animals is provided with a ventilation and feeding system. The ventilation system includes an opening in an exterior wall of the shelter for circulation and a vent at the top of the shelter. The vent comprises a raised portion on the roof of the shelter covered by a cap. The raised portion has ventilation openings. The underside of the cap is fitted with lugs to rest on the raised portion to hold the cap in its raised position. The lugs fit in the ventilation openings when the cap is rotated to its lowered position. The opening in the side of the shelter is also used for access to the feeding station. The feeding station includes a flange which engages the lower edge of the opening. The feeding station has at least one generally circular fitting with a tapered lip which receives a tapered feeding bucket. The tapered feeding bucket has a raised splash guard.

Abstract: A carving machine which has a tubular framework that allows easy attachment of one or more supplemental frames and additional carving spindles to the base frame. The length of the machine frame also can be extended very easily to accommodate longer workpieces. The carver includes individual motors driving the carving tools. The motors are mounted in housings provided with vacuum attachments for inducing a flow of cooling air for the individual motors. The housings also are sound deadened to reduce the noise level.

Abstract: A method of applying a switch guard device to a wall switch to prevent unintentional actuation of the wall switch. The wall switch has an actuating lever extending through an aperture in a switch plate with the switch plate normally being attached to the wall switch on opposite sides of the actuating lever by screw threaded fasteners. The switch guard device is formed from a flexible body portion, initially relatively flat, having a pair of spaced apart apertures for receiving the threaded fasteners. The spaced apart apertures are spaced a sufficient distance that when the threaded fasteners are received by the spaced apertures attaching the body portion to the switch plate, the body portion flexes into an arcuate configuration covering the actuating lever sufficiently to prevent accidental movement of the lever but to allow intentional movement of the lever.

Abstract: An x-ray apparatus uses an x-ray tube which is pivoted about a pivot axis to provide scanning of an x-ray beam. The pivot axis passes essentially through the center of the focal spot on the target surface of the anode of the tube, is essentially perpendicular to the anode-cathode axis, and is essentially parallel to a film plane defined by the x-ray film. The scanning of the x-ray beam by pivoting the x-ray tube results in improved systems for standard radiography, linear tomography, and large-scale angiography. In standard radiography and large scale angiography systems, moving primary and secondary slots synchronized with the pivoting of the x-ray tube provide efficient removal of secondary radiation. In linear tomography systems, the object and film are moved synchronously with the pivoting of the x-ray tube, and primary and secondary slots which are stationary remove secondary radiation.

Abstract: A hitch transport assembly for use with end wheel grain drills which permits pulling a plurality of such end wheel grain drills in an end to end relationship across the field, and which permits folding the outer drills rearwardly into a transport position for moving the drills from field to field. A frame assembly supports the end wheels of the drills off the ground for transport. Changing the connections to convert from a working hitch to a transport hitch is rapid and simple.

Abstract: A combination lock having a plurality of rotatable tumblers, a knob for positioning the tumblers, a bolt, a bolt cam for operating the bolt to unlock the lock upon proper positioning of the rotatable tumblers by proper clockwise and counter-clockwise rotation of the knob, and locking means for preventing said bolt cam from operating the bolt prior to proper positioning of the rotatable tumblers. According to a preferred embodiment the locking means includes a floating pin unconnected to any structure but moveable within the lock structure between positions preventing and permitting movement of the bolt cam and the knob is longitudinally moveable to engage the bolt cam for operation of the bolt.

Abstract: A metal detection apparatus that detects metal objects includes a nonmetallic basket in which the metal objects are retrieved. The nonmetallic basket has a top portion, a side wall portion, an open bottom and a blade portion for scooping material into the basket through the open bottom. The basket is attached to one end of a handle. A metal detection coil for detecting the metal objects is pivotally mounted with respect to the basket so that the metal detection coil is normally in a first search position proximate and at least partially covering the open bottom for detecting metal objects, and pivots to a second position within the basket as the basket fills with dirt and other material. The basket preferably has apertures in the top portion so that the basket, when inverted, can sift the material for metal objects.

Abstract: A lifting jack has its upward and downward traveling distance controlled by means of a limit switch. The lifting jack has a base, an upright outer member rigidly connected to the base and an upright inner member movable coaxially within the outer member. An up stop and an adjustable down stop are rigidly attached to and move with the inner member. An adjustable mount is mounted in a fixed position on the outer member, and the limit switch is mounted in fixed position on the mount. A guide shoe assembly is pivotally connected to the mount and is oriented generally perpendicular to the direction of travel of the inner member. A stop engaging member at one end of the guide is positioned to engage the up stop and the down stop, and an arm guiding portion at the opposite end engages and guides an actuating arm of the limit switch.

Abstract: A pressure release mechanism relieves pressure to a prescribed value in a caulking gun. The pressure release mechanism includes a slot positioned in the handle of the gun and a pin which slides in the slot. A pawl is pivotably attached to the pin and engages the teeth of a ratchet bar to rearward movement of the ratchet bar and piston. An outwardly biased operating lever with an upper cam shaped surface engages the pin and urges the pin and pawl towards the front end of the slot as caulking compound is extruded from the gun under pressure. When the operating lever is completely released, the cam surface permits a biasing spring to move the pawl and pin to the rear of the slot. The pawl is engaged with a ratchet bar tooth as it moves to the rear, and thereby allows the ratchet bar and piston to move rearwardly a limited distance, which relieves the pressure within the caulking gun sufficiently to stop the flow of caulking material.

Abstract: A compensator which permits the input velocity of a web conveyor system to be varied (reduced to zero if desired) while maintaining a constant output velocity and tension in the web. This is accomplished by a power actuated movable carriage having web rollers connected therewith for controllably varying the length of a multiple run web control path interposed at the input end of a belt conveyor system.

Abstract: A photographic slide mounter includes a film advance mechanism which advances a photographic film web along a film track to insert the end of the film web into a photographic slide frame. The film advance mechanism includes a guide track parallel to the film track and a carriage which is movable on the guide track. A film advance pawl is connected to and movable with the carriage. The pawl engages sprocket holes in the film to advance the film as the carriage is advanced toward a first end of the film track. A drive mechanism advances the carriage toward the first end of the guide track during one portion of an operating cycle, and returns the carriage to the second end during another portion of the operating cycle. The film advance mechanism includes a breakaway mechanism for disconnecting the carriage and the drive mechanism when resistance to advancement of the carriage exceeds a predetermined amount.

Abstract: A retractor apparatus includes an improved clamping device on the sterile side of a surgical drape with the drape covering an operating table having side rails. The device includes a first member having a first clamping portion and a second member having a second clamping portion. The second member is pivotally attached to the first member. The first and second portions engage the sterile side of the surgical drape and when the second member is pivoted into a clamping position with the first member, the first and second portions clamp the surgical drape and side rail. A tightening mechanism retains the first and second clamping portions in the clamping position. The first and second members have first and second passages, respectively, that are substantially aligned with each other in both the clamping position and a nonclamping position. A support member of the surgical retractor apparatus extends through the first and second passages and is secured therein in a fixed position by a suitable mechanism.

Abstract: An x-ray apparatus uses an x-ray tube which is pivoted about a pivot axis to provide scanning of an x-ray beam. The pivot axis passes essentially through the center of the focal spot on the target surface of the anode of the tube, is essentially perpendicular to the anode-cathode axis, and is essentially parallel to a film plane defined by the x-ray film. The scanning of the x-ray beam by pivoting the x-ray tube results in improved systems for standard radiography, linear tomography, and large-scale angiography. In standard radiography and large scale angiography systems, moving primary and secondary slots synchronized with the pivoting of the x-ray tube provide efficient removal of secondary radiation. In linear tomography systems, the object and film are moved synchronously with the pivoting of the x-ray tube, and primary and secondary slots which are stationary remove secondary radiation.

Abstract: A remote control bench mounted chain saw apparatus for cutting firewood, includes a chain saw device having handle, trigger, body and bar chain. Also included is a bench having a first support member with an interdigital slot, a second support member having a cooperating interdigital slot for mating with the first support member to form a cross, and a top member hingedly mounted on one of the support members on a side parallel to its slot, the top member being further adapted to detachably engage the other support member on a side parallel to its slot when the cross is formed to position the top member in a horizontal position. The top member includes means for restraining the handle and body of the chain saw and positioning the saw to permit access to the top of said bar and chain. Finally, remote control means are attached to the trigger of the saw and have an activator positioned remote from the saw and the top member for activation of the saw triggered by pressure applied to the activator.

Abstract: A variable tread vehicle includes first and second parallel horizontal rails which are connected to a frame and extend in a direction which is transverse to the direction of movement of the vehicle. First and second movable carriages are movable on sections of the track formed by the rails. A first drop axle is connected to and extends downward from the first movable carriage, and a second drop axle is connected to and extends downward from the second movable carriage. Connected near the lower ends of the first and second drop axles are first and second wheels of the vehicle. The first and second movable carriages are moved on the track by first and second threaded drive shafts, which are driven by hydraulic motors. By controlling the hydraulic motors, the operator can drive the first and second movable carriages outward to increase the spacing between the first and second wheels, or can drive the first and second movable carriages inward to decrease the spacing between the first and second wheels.

Abstract: In a photographic printer, photographic print paper is transported from the print paper supply to a print mask location. The print paper is guided by an interchangeable guide spool to ensure proper centering at the print mask location. The guide spool, being preset for a particular print paper width, automatically centers the print paper when mounted on a spindle so as to abut against a permanently positioned flange. The guide spool includes an inner sleeve that abuts against the permanently positioned flange, an outer sleeve coaxially rotating around the outer surface of the inner sleeve and having an outer surface that engages the photographic print paper, and guides attached proximate both ends of the outer sleeve for guiding the print paper on the outer surface of the outer sleeve.

Abstract: A processor of photosensitive material includes an automatic control system for providing anti-oxidation replenishment. The control system includes a real time clock for providing an indication of the time of day, and means for storing a schedule of operating hours of the processor. The control system controls anti-oxidation replenishment as a function of the time of day and the schedule of operation. In one embodiment, the control system provides anti-oxidation replenishment on a twenty-four hour basis (even during nonoperating hours) by operating the developer circulation pump and the anti-oxidation replenishment pump on a periodic basis during nonoperating hours. In another embodiment, which is particularly useful when there are restrictions against leaving on electric power to the processor during nonoperating hours, the control system adds a bulk amount of anti-oxidation replenishment at the time of turn-on of the processor.

Abstract: An oxygen sensing element has a body of chromium-rich zinc chromite and electrodes in contact with it for sensing the electrical resistance. At elevated temperatures, the resistance varies with oxygen concentration. A rare earth oxide dopant, preferably 15% mole percent Lanthanum 10 oxide, stabilizes and improves performance.

Abstract: An improved photographic print stacking device includes a print slide concavely bowed transversely to the direction of travel proximate a discharge end of a conveying line, and a pair of drive rollers. Individual photographic prints are conveyed on the conveying line onto the concavely bowed print slide. The drive rollers engage and push the central portion of each print downwardly against the central portion of the print slide, while the slide edge portions of each print are deflected upwardly by the side edges of of print slide so that each print is bowed, thereby giving each print greater beam strength in the direction of travel.