Abstract: Resettable circuit interrupting devices, such as GFCI devices, that include reverse wiring protection, and optionally an independent trip portions and/or a reset lockout portion are provided. The reverse wiring protection operates at both the line and load sides of the device so that in the event line side wiring to the device is improperly connected to the load side, fault protection for the device remains. The trip portion operates independently of a circuit interrupting portion used to break the electrical continuity in one or more conductive paths in the device. The reset lockout portion prevents the reestablishing of electrical continuity in open conductive paths if the circuit interrupting portion is non-operational or if an open neutral condition exists.

Abstract: Resettable circuit interrupting devices, such as GFCI devices, that include reverse wiring protection, and optionally an independent trip portions and/or a reset lockout portion are provided. The reverse wiring protection operates at both the line and load sides of the device so that in the event line side wiring to the device is improperly connected to the load side, fault protection for the device remains. The trip portion operates independently of a circuit interrupting portion used to break the electrical continuity in one or more conductive paths in the device. The reset lockout portion prevents the reestablishing of electrical continuity in open conductive paths if the circuit interrupting portion is non-operational, if an open neutral condition exists or if the device is reverse wired. Methods for ensuring a reset lock out state before shipment are provided.

Abstract: Resettable circuit interrupting devices using a center latch are provided. The circuit interrupting devices include those with a reset lockout, reverse wiring protection, and/or an independent trip portion.

Abstract: Resettable circuit interrupting devices, such as GFCI devices, that include an independent trip mechanism and a reset lockout mechanism are provided. The trip mechanism operates independently of a circuit interrupting mechanism used to break the connection, and the reset lockout mechanism prevents the resetting of electrical connections between input and output conductors if the circuit interrupting mechanism is non-operational or if an open neutral condition exists.

Abstract: Resettable circuit breakers having an independent trip mechanism and a reset lockout are provided. The trip mechanism operates independently of the fault protection operations, and the reset lockout prevents the resetting of the circuit breaker if the fault protection is non-operational or if an open neutral condition exists.

Abstract: Resettable circuit interrupting devices, such as GFCI devices, that include reverse wiring protection, and optionally an independent trip portions and/or a reset lockout portion are provided. The reverse wiring protection operates at both the line and load sides of the device so that in the event line side wiring to the device is improperly connected to the load side, fault protection for the device remains. The trip portion operates independently of a circuit interrupting portion used to break the electrical continuity in one or more conductive paths in the device. The reset lockout portion prevents the reestablishing of electrical continuity in open conductive paths if the circuit interrupting portion is non-operational or if an open neutral condition exists.

Abstract: Resettable circuit breakers having an independent trip mechanism and a reset lockout are provided. The trip mechanism operates independently of the fault protection operations, and the reset lockout prevents the resetting of the circuit breaker if the fault protection is non-operational or if an open neutral condition exists.

Abstract: Resettable circuit interrupting devices, such as GFCI devices, that include an independent trip mechanism and a reset lockout mechanism are provided. The trip mechanism operates independently of a circuit interrupting mechanism used to break the connection, and the reset lockout mechanism prevents the resetting of electrical connections between input and output conductors if the circuit interrupting mechanism is non-operational or if an open neutral condition exists.

Abstract: A layer of thermal fusible material is placed on one surface of a metal oxide varistor (MOV) to monitor the heating of the MOV due to applied voltage spikes. The thermal fusible material is part of the electrical circuit which includes the MOV and melts at a predetermined temperature. In the presence of a severe or a number of voltage spikes the MOV heats up and the heat transferred to the thermal fusible material causes it to open the electrical circuit to the MOV to prevent overheating and thermal runaway. In another form, the MOV is separated into two halves and the thermal fusible material layer is placed between the ends of the MOV halves.

Abstract: Resettable circuit interrupting devices, such as GFCI devices, that include reverse wiring protection, and optionally an independent trip portions and/or a reset lockout portion are provided. The reverse wiring protection operates at both the line and load sides of the device so that in the event line side wiring to the device is improperly connected to the load side, fault protection for the device remains. The trip portion operates independently of a circuit interrupting portion used to break the electrical continuity in one or more conductive paths in the device. The reset lockout portion prevents the reestablishing of electrical continuity in open conductive paths if the circuit interrupting portion is non-operational or if an open neutral condition exists.

Abstract: A layer of thermal fusible material is placed on one surface of a metal oxide varistor (MOV) to monitor the heating of the MOV due to applied voltage spikes. The thermal fusible material is part of the electrical circuit which includes the MOV and melts at a predetermined temperature. In the presence of a severe or a number of voltage spikes the MOV heats up and the heat transferred to the thermal fusible material causes it to open the electrical circuit to the MOV to prevent overheating and thermal runaway. In another form, the MOV is separated into two halves and the thermal fusible material layer is placed between the ends of the MOV halves.

Abstract: A negative stage comprises a lower platform and an upper platform. Each of the platforms includes an aperture for allowing passage of light through the platform from a light source in the enlarger. The platforms are aligned in a face-to-face relationship with the apertures generally in alignment. The platforms are spaced-apart by a fixed pivot-member and two adjustable support-members extendable in a direction generally perpendicular to the platforms for adjusting spacing and alignment of the platforms. In one embodiment the upper platform is retained in contact with the pivot-member and adjusting screws by spring loaded plungers. The spring loaded retaining arrangement allows relative movement between the platforms for alignment while still retaining the platforms firmly in contact with the pivot-member and adjusting screws.

Abstract: A negative stage comprises a generally flat lower platform and a generally flat upper platform, each of the platforms includes an aperture for allowing passage of light through the platform from a light source in the enlarger.The platforms are aligned in a face-to-face relationship with the apertures generally in alignment. The platforms are spaced-apart by at least three adjustable support-members extendable in a direction generally perpendicular to the platforms for adjusting spacing and alignment of the platforms. In one embodiment The upper platform is retained in contact with lower platform by spring loaded plungers. The spring loaded retaining arrangement allows relative movement between the platforms for alignment while still retaining the platforms firmly in contact with the support-members.A light-baffle arrangement prevents light leakage between the platforms.

Abstract: A light-tight optical disk cartridge is disclosed for use with ETOM erasable and other optical disks in which light baffles incorporating a snap lock feature are utilized in the assembly of the optical disk cartridge in order to provide structural integrity to the cartridge as well as to prevent the entry of light into the cartridge. A snap close slide and latching mechanism is incorporated in order to prevent accidental opening of the access mechanism of the optical disk cartridge.

Abstract: An alignment arrangement for photographic recording apparatus having a lens plane, an object plane, and an image plane. The alignment arrangement comprises an alignment module including a mirror, and luminous indicia disposed in a plane parallel to the mirror's reflective surface. The alignment module may be mounted on the apparatus so that the mirror's reflective surface lies parallel to one of the planes of the apparatus. A second mirror may be placed in another plane of the apparatus so that its reflective surface is parallel to that plane. The alignment module includes a viewing system which allows the two mirrors to be simultaneously viewed. Multiple images of the indicia, created by the two mirrors, may be observed. The images assume only one of many different patterns when the reflective surfaces of the two mirrors are parallel.

Abstract: An optical disk structure for an erasable optical disk for use with an erasable optical disk drive using electron trapping optical memory media is disclosed in which several distinct layers in additon to the electron trapping optical memory media are utilized in order to minimize light scatter between adjacent tracks on the disk and to carry permanent format and guidance information for use in accomplishing the write, read and focusing and tracking functions of the erasable opticl disk drive with which the disk structures are utilized. The use of absorbing layers as part of the optical disk structure for attenuating reflections of light within the disk structure and eliminating the spreading of marks is also disclosed.

Abstract: An erasable optical disk drive system is disclosed which utilizes an electron trapping media coated on the disk surface to store data in the form of light energy and which utilizes three laser beams, each having a wavelength range distinct from each other as well as distinct from the wavelength range of the emission produced by the impingement of the read laser onto the electron trapping media. Data is written onto the disk, which is contained in a light-tight contamination-free environment, using a visible light laser beam. Data is read from the disk and the disk is erased by using a near infrared light laser beam. The focus and tracking functions of the disk drive system are accomplished by using a laser beam having yet another range of wavelengths, which are greater than those of the visible light laser beam and those of the photon emission from the electron trapping optical memory media, but less than those of the read/erase laser.

Abstract: An alignment arrangement for use with a photograph enlarger apparatus is disclosed herein. The enlarger apparatus includes an enlarger head assembly, an enlarger easel and means for supporting the enlarger head assembly above the easel. The alignment arrangement include a first mirror member which is configured to lie on the enlarger easel and a second mirror member which is connected to the enlarger head assembly, at a particular location for aligning the camera with the easel in a specific way. There is also disclosed herein a specific assembly for adjusting the position of the easel itself.

Abstract: A mirror assembly forming part of an overall arrangement for insuring that the lens of a camera supported by a tripod or the like is parallel with a flat surface supporting an object to be photographed is disclosed herein. This mirror assembly includes a mirror member having a mirrored body including a mirrored surface and a view hole through its mirrored body and mirrored surface. It also includes means for connecting the mirror member to the camera. One such means comprises a T-mount designed to temporarily replace the lens. Another means utilizes a combination of an adaptor ring and a retaining ring. Still another means utilizes the adaptor ring alone.

Abstract: An alignment arrangement for use with a photograph enlarger apparatus is disclosed herein. The enlarger apparatus includes an enlarger head assembly, an enlarger easel and means for supporting the enlarger head assembly above the easel. The alignment arrangement includes a first mirror member which is configured to lie on the enlarger easel and a second mirror member which is connected to the enlarger head assembly, at a particular location for aligning the camera with the easel in a specific way. There is also disclosed herein a specific assembly for adjusting the position of the easel itself.