Patents by Inventor Randolph W. Hamerdinger
Randolph W. Hamerdinger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4639926Abstract: An improved negative glow discharge hollow cathode device for generating laser radiation. The device comprises a hollow cathode assembly substantially surrounded by an anode envelope having a body section and a pair of end sections, each of the end sections terminating in a radiation transmission member. The metal laser medium is enclosed in the vicinity of the perforations in the cathode such that the metal vapor can be readily introduced into the cathode central region effectively and efficiently. The anode to cathode discharge paths is reduced by the use of an anode screen such that the glow discharge is directed into the cathode central region with a controlled discharge gap for optimum pressure and confined negative glow discharge within the cathode. The metal laser medium, in the form of a metal foil or sheet, is lined adjacent the cathode outer surface and perforated cathode holes in the lower half portion of the cathode.Type: GrantFiled: June 9, 1980Date of Patent: January 27, 1987Assignee: Xerox CorporationInventors: Shing C. Wang, Randolph W. Hamerdinger
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Patent number: 4380078Abstract: A gas laser for generating multiline emissions when appropriately energized. The laser includes an anode-cathode assembly (18, 16, 18) and, in a first embodiment, adjustable Brewster end sections, or in a second embodiment, integral mirror end sections (70, 72). The anode-cathode assembly comprises two center located short cylindrical anodes (16a, 16b) and two segmented cylindrical hollow cathodes (18) located symmetrically adjacent the split anode (16a, 16b). The anodes and cathodes are electrically insulated by a cylindrical metal ceramic seal (20). The outer surface of each cathode (18) is covered with quartz insulating sleeves (24) to prevent electrical discharge from the outer cathode surface and to encourage effective inner cathode discharge. The cathode (18) is thermally connected to the external environment through a structure (26) coupled to the cathode and the laser tube envelope (11) to improve heat dissipation, thereby allowing higher input power.Type: GrantFiled: June 25, 1981Date of Patent: April 12, 1983Assignee: Xerox CorporationInventors: Shing C. Wang, Randolph W. Hamerdinger
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Patent number: 4287484Abstract: A laser device for generating multiline emissions when appropriately energized. The device consists of two major components, an anode-cathode assembly and, in a first embodiment, an adjustable brewster end section or in a second embodiment, an integral mirror end section. The anode-cathode assembly comprises one center located short cylindrical anode and two segmented cylindrical hollow cathodes located symmetrically on each side of the anode. The anode and cathode are electrically insulated by a cylindrical metal ceramic seal. The outer surface of the cathode is covered with quartz insulating sleeves to prevent electrical discharge from the outer cathode surface and to encourage effective inner cathode discharge.Type: GrantFiled: October 2, 1978Date of Patent: September 1, 1981Assignee: Xerox CorporationInventors: Shing C. Wang, Randolph W. Hamerdinger
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Patent number: 4255720Abstract: A laser device for generating multiline emissions when appropriately energized. The device consists of two major components, an anode-cathode assembly and, in a first embodiment, an adjustable brewster end section or in a second embodiment, an integral mirror end section. The anode-cathode assembly comprises one center located short cylindrical anode and two segmented cylindrical hollow cathodes located symmetrically on each side of the anode, the inner diameter of the hollow cathodes being variable depending on the particular laser transition involved and particular output level required, the length of each cathode also being variable to adjust the gain of the selected laser transition. The anode and cathode are electrically insulated by a cylindrical metal ceramic seal. The outer surface of the cathode is covered with quartz insulating sleeves to prevent electrical discharge from the outer cathode surface and to encourage effective inner cathode discharge.Type: GrantFiled: October 2, 1978Date of Patent: March 10, 1981Assignee: Xerox CorporationInventors: Shing C. Wang, Randolph W. Hamerdinger
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Patent number: 4233568Abstract: A laser tube end assembly which comprises a laser mirror sealed to each end of the laser tube, the seal withstanding the relatively high temperatures utilized to remove contaminants from the laser tube during fabrication thereof, the sealant also minimizing gas permeation therethrough during laser tube utilization. The assembly is fabricated by first preparing an apertured recessed metal flange member. A slurry, comprising a glass frit and carrier, is introduced into the metal flange member and allowed to dry. The metal flange member is placed in a first portion of a fixture and a glass substrate having a reflecting layer coated thereon is positioned adjacent the flange member recess with the reflecting layer being at least coextensive with the aperture. The weighted second portion of the fixture contacts the non-reflecting side of the glass substrate to ensure that the glass substrate reflecting layer is in contact with the surface of the metal flange member via the dried slurry.Type: GrantFiled: February 24, 1975Date of Patent: November 11, 1980Assignee: Xerox CorporationInventors: Randolph W. Hamerdinger, Robert C. McQuillan
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Patent number: 4187474Abstract: An internal mirror metal vapor laser, and in particular, a helium-cadmium laser discharge tube, which is economical, compact and has a relatively long operating and shelf life, typically of 10,000 hours. A positive column helium-cadmium laser tube of the consumable type and having optical resonator mirrors integral with the tube ends to hermetically seal the tube is provided which includes a relatively large volume cadmium reservoir capable of containing sufficient cadmium for life times exceeding ten thousand hours. A resistive heater is applied to the cadmium reservoir for controlling the cadmium vapor pressure. A heat sunk diffusion confinement section and a cataphoretic confinement section are provided adjacent one end mirror and a heat sunk diffusion confinement section is provided adjacent the other end mirror to protect the end mirrors from condensing cadmium vapor.Type: GrantFiled: August 11, 1977Date of Patent: February 5, 1980Assignee: Xerox CorporationInventors: William F. Hug, Randolph W. Hamerdinger, Phillip D. Dunn, Robert C. McQuillan
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Patent number: 4149779Abstract: A laser tube mirror alignment fixture for use in adjusting the reflecting mirrors on the ends of a laser tube. The fixture consists of two flange members which, when welded, form a single convection bellows, and a backing ring in which a number of screws are placed to provide for adjustment of the reflecting mirrors. The laser reflector is sealed to one of the flanges. The displacement is achieved by adjusting the screws on the backing ring and creating a differential pressure on the back flange of the bellows which, after adjusting the screws, can be locked tight to ensure no further movement.Type: GrantFiled: November 10, 1977Date of Patent: April 17, 1979Assignee: Xerox CorporationInventors: Randolph W. Hamerdinger, Robert C. McQuillan
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Patent number: 4105954Abstract: An improved device for promoting the emission of radiation by utilizing electrical energy to raise material from an initial state to an excited state is disclosed. The device includes enclosed means, including an elongated body section defining a first electrode and a pair of end sections, for enveloping a space occupied by the material. The device further includes a second electrode, adapted to receive electrical energy, disposed in fixed relationship with the first electrode for distributing the electrical energy thereto.Type: GrantFiled: July 1, 1976Date of Patent: August 8, 1978Assignee: Xerox CorporationInventors: Shing C. Wang, Randolph W. Hamerdinger
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Patent number: 4052680Abstract: A radiation emission device characterized by a cylindrical cathode enclosed by an elongated envelope having a body section and two end sections is disclosed. The device includes an anode terminal, coupled to the body section, which serves to provide electrical energy to excite metallic material inside the envelope. The device further includes a pair of cataphoresis terminals located along each end section to prevent the excited metallic material from drifting into contact with radiation transmission windows located at the terminus of each end section.Type: GrantFiled: July 1, 1976Date of Patent: October 4, 1977Assignee: Xerox CorporationInventors: Shing Chung Wang, Randolph W. Hamerdinger, William F. Hug
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Patent number: 3952798Abstract: A heat pipe is provided with an internally positioned heat source.Type: GrantFiled: August 31, 1970Date of Patent: April 27, 1976Assignee: Xerox CorporationInventors: Dean L. Jacobson, Randolph W. Hamerdinger