Abstract: Unused camera pixel locations are recovered when shifting from photographing an x-ray scintillation image of a larger subject to that of a substantially smaller one by using a suitably shorter optical path combined with appropriate changes in focus. The optical path for large subjects involves a first mirror followed by a second mirror. The camera receives light from the second mirror, and is in a fixed and unchanging physical relationship to that second mirror, forming a unitary mirror-camera assembly. To shorten the optical path that unitary assembly is rotated about an axis from a position where it was in the optical path downstream from the first mirror to one where the second mirror is interposed between the scintillation screen and the first mirror, and also such that the camera looks in a different direction along the shortened optical path length.

Abstract: Unused camera pixel locations are recovered when shifting from photographing an x-ray scintillation image of a larger subject to that of a substantially smaller one by using a suitably shorter optical path combined with appropriate changes in focus. The optical path for large subjects involves a first mirror followed by a second mirror. The camera receives light from the second mirror, and is in a fixed and unchanging physical relationship to that second mirror, forming a unitary mirror-camera assembly. To shorten the optical path that unitary assembly is rotated about an axis from a position where it was in the optical path downstream from the first mirror to one where the second mirror is interposed between the scintillation screen and the first mirror, and also such that the camera looks in a different direction along the shortened optical path length.

Abstract: A high-bandwidth electrical test probe having a probe contact spring of reduced size and characteristic capacitance is presented. The probe includes a contact spring connected at one end to the input port of a probe circuit. The opposite end of the contact spring enters the a probe socket and a predetermined angle of entry. The probe socket has a bore formed therein which is arranged at a non-zero angle relative to the angle of entry of the contact spring into said probe socket bore, thereby guaranteeing electrical contact with the bore. The design allows the use of a very small contact spring, on the order of tens of mils, thereby reducing the parasitic capacitance of the spring and allowing much higher bandwidths than heretofore achievable.

Abstract: A high-bandwidth electrical test probe having a probe contact spring of reduced size and characteristic capacitance is presented. The probe includes a contact spring connected at one end to the input port of a probe circuit. The opposite end of the contact spring enters the a probe socket and a predetermined angle of entry. The probe socket has a bore formed therein which is arranged at a non-zero angle relative to the angle of entry of the contact spring into said probe socket bore, thereby guaranteeing electrical contact with the bore. The design allows the use of a very small contact spring, on the order of tens of mils, thereby reducing the parasitic capacitance of the spring and allowing much higher bandwidths than heretofore achievable.

Abstract: A sub-chassis bracket attached to a horizontal motherboard has holes: (a) through which the connectors pass and that space the connectors apart by an intended nominal amount; and (b) that allow the connectors to shift horizontally as needed to form the mechanical path from a particular spacing on the motherboard to a front panel, with its own actual particular spacing, and to which panel the connectors are each fastened with a nut. The nuts are have a symmetrically tapered or curved surface on the side that contacts the outside of the panel, whose holes therethrough are somewhat oversize. The nuts individually center the connectors in their respective panel holes, and draw each connector perpendicular to the panel. To provide a particular connector feature orientation, and to prevent the connectors from rotating and disturbing that orientation during the tightening of the nuts, each connector has a central region of increased diameter that has two flats and that forms a shoulder.

Abstract: A sub-chassis bracket attached to a horizontal motherboard has holes: (a) through which the connectors pass and that space the connectors apart by an intended nominal amount; and (b) that allow the connectors to shift horizontally as needed to form the mechanical path from a particular spacing on the motherboard to a front panel, with its own actual particular spacing, and to which panel the connectors are each fastened with a nut. The nuts are have a symmetrically tapered or curved surface on the side that contacts the outside of the panel, whose holes therethrough are somewhat oversize. The nuts individually center the connectors in their respective panel holes, and draw each connector perpendicular to the panel. To provide a particular bayonet pin orientation, and to prevent the connectors from rotating and disturbing that orientation during the tightening of the nuts, each connector has a central region of increased diameter that has two flats and that forms a shoulder.

Abstract: A bracket attached to a peripheral device of a computer system aligns and attaches the peripheral device to the inside of a computer system chassis. The bracket is detachably mountable and includes a bracket body having an aperture therein through which the peripheral device is inserted. The bracket includes a support bar having a tab that fits into a slot in the chassis to securely hold the peripheral device in position such that the front panel of the peripheral device is aligned within an aperture in a face of the chassis.

Abstract: A fastenerless clip attaches a system component to the inside of a chassis of a computer system. The clip is detachably mountable and includes a clip body with a resilient portion to provide a compressive force that securely holds the system component in position against a face of the chassis. The fastenerless clip is useful in attaching rotary cooling fans to a lateral face of a computer system chassis.

Abstract: A high-bandwidth electrical test probe having a probe contact spring of reduced size and characteristic capacitance is presented. The probe includes a contact spring connected at one end to the input port of a probe circuit. The opposite end of the contact spring enters the a probe socket and a predetermined angle of entry. The probe socket has a bore formed therein which is arranged at a non-zero angle relative to the angle of entry of the contact spring into said probe socket bore, thereby guaranteeing electrical contact with the bore. The design allows the use of a very small contact spring, on the order of tens of mils, thereby reducing the parasitic capacitance of the spring and allowing much higher bandwidths than heretofore achievable.

Abstract: A solution to problems of poor RF performance in conventional BNC connectors is to first, eliminate the use of Teflon, in favor of an air dielectric in the vicinity of the mating parts, and support the male and female center pins further back within the body of the connector, using other proven dielectric materials borrowed from the precision type N connector, or from another 7 mm RF connector. Next, a captive knurled draw nut provides positive displacement and the tension needed to draw the already mated male and female connector halves together, in place of the conventional spring tension. It is the bottoming out of the male shell inside the female shell that resists the positive displacement and the tension supplied by the knurled draw nut, ensuring that the two connector halves are actually in contact, and that the edges of shell surfaces that need to “vanish” for good operation do indeed vanish.

Abstract: A bracket attached to a peripheral device of a computer system aligns and attaches the peripheral device to the inside of a computer system chassis. The bracket is detachably mountable and includes a bracket body having an aperture therein through which the peripheral device is inserted. The bracket includes a support bar having a tab that fits into a slot in the chassis to securely hold the peripheral device in position such that the front panel of the peripheral device is aligned within an aperture in a face of the chassis.

Abstract: A solution to problems of poor RF performance in conventional BNC connectors is to first, eliminate the use of Teflon, in favor of an air dielectric in the vicinity of the mating parts, and support the male and female center pins further back within the body of the connector, using other proven dielectric materials borrowed from the precision type N connector, or from another 7 mm RF connector. Next, a captive knurled draw nut provides positive displacement and the tension needed to draw the already mated male and female connector halves together, in place of the conventional spring tension. It is the bottoming out of the male shell inside the female shell that resists the positive displacement and the tension supplied by the knurled draw nut, ensuring that the two connector halves are actually in contact, and that the edges of shell surfaces that need to “vanish” for good operation do indeed vanish.

Abstract: A fastenerless clip attaches a system component to the inside of a chassis of a computer system. The clip is detachably mountable and includes a clip body with a resilient portion to provide a compressive force that securely holds the system component in position against a face of the chassis. The fastenerless clip is useful in attaching rotary cooling fans to a lateral face of a computer system chassis.