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| Number | Title | Issue Date |
| 4880147 | Air blast generator An air blast generator is provided in the form of a pressure accumulator with a spring-loaded bellows. Air pressure expands the bellows, compressing the spring to store energy. When a valve is opened the spring aids in expulsion of the air such that a hig... | 11/14/1989 |
| 4790054 | Multi-stage venturi ejector and method of manufacture thereof The method of manufacture of a multi-stage venturi ejector and body segments thereof which comprises forming an elongated extrusion having an ejector body cross-sectional shape with laterally extending mounting projections and axially extending internal a... | 12/13/1988 |
| 4772013 | Rowing exercise machine A rowing exercise machine of the type in which a wheel with air paddles is rotated by an operator by pulling on a pull bar attached to a chain which extends around gears on the wheel axle, while sitting on a seat which rolls back and forth on a support be... | 09/20/1988 |
| 4698988 | Key for a lock of the plunger operated type A key for a lock of the plunger operated type in which an elongated housing has an internal axially movable plunger which releases locking elements when moved toward the open end of the housing, said key having a body with elongated fingers extending forw... | 10/13/1987 |
| 4640538 | Security seal A security seal of the type which utilizes a stranded cable as a shackle. A seal body is provided with a pair of spaced apertures for receiving the end portions of a length of cable. A first cable end may be freely insertable into a shackle aperture, or m... | 02/03/1987 |
| 4624640 | Wafer for a dental impression for identification purposes A method and article for providing identification means, comprising taking an impression of teeth with a wax wafer of special configuration such that the wafer receives an impression which gives the size and shape of each tooth from the occusal surface to... | 11/25/1986 |
| 4622753 | Electric meter socket repair kit and template for use therewith A repair kit for an electric meter socket, which includes a set of jaw contacts mounted on a support plate, with means for mounting said plate in a desired spaced relation to the back of the meter box so that the blade contacts of the meter will be insert... | 11/18/1986 |
| 4600220 | Connection nut seal with means for allowing test of integrity A seal for a gas meter coupling nut comprising a ring-shaped housing formed of two separate but identical halves made of relatively brittle molded plastic and having integrally molded fastening means for snapping together the two halves into locking non-r... | 07/15/1986 |
| 4588218 | Security seal A seal of the type having a housing with internal resilient fingers for receiving a shouldered stud in locking engagement. The housing is generally cylindrical with a closed end and an open end. In one embodiment of the invention a separate member carryin... | 05/13/1986 |
| 4586570 | Combination seal and locking pin A combination seal and locking pin for a fire extinguisher handle or other device in which two members must be retained in fixed relation to each other, in which the seal portion comprises a housing, a shackle to be received in the housing in locking rela... | 05/06/1986 |
| 4568926 | Smoke detector A smoke detector utilizing a pulsing light source, a photo-voltaic cell, and an amplifier, in which the total current output on each light pulse is a function of the smoke concentration. In a preferred embodiment of the invention, the amplifier output cur... | 02/04/1986 |
| 4543807 | Plunger operated lock A plunger operated lock in which the lock operating plunger is mounted in a plunger housing inside the lock housing and is axially movable therein. The plunger housing is spring biased to the locking position, and the plunger is spring biased to a medial ... | 10/01/1985 |
| 4544190 | Connection nut seal A seal for a pipe coupling such as is used to connect a gas meter to a gas supply line. The seal is made in two portions having integral fastening means for locking the two portions around the nut of a coupling. The fastening means include a pair of flexi... | 10/01/1985 |
| 4531388 | Change code system in combination padlocks A combination padlock of the type in which code wheels are mounted on a shaft in the housing and a bushing is associated with each code wheel, the padlock combination being changed by relative rotation between the code wheels and the bushings, in which th... | 07/30/1985 |
| 4506415 | Security seal and tag holder A combination security seal and identification tag holder for assembly onto the neck of a mail bag or the like, in which a shackle locking mechanism is provided with a housing having a locking plug which is inaccessible when the seal is assembled onto the... | 03/26/1985 |
| 4506921 | Security seal A security seal of the type in which a stud and socket are hinged together for movement into locking engagement, in which means is provided for imparting a disengaging force to the stud and socket when they are moved toward engagement, so that if the stud... | 03/26/1985 |
| 4506619 | Wing sail drive system A hydraulic drive system for a wing sail on a vessel, comprising a rotatable frame at the base of the mast and hydraulic cylinders connected between the frame and the ship's structure to cause rotation of the frame in either direction through a limited an... | 03/26/1985 |
| 4499841 | Sail rigging and control system A sail support and control system designed for use as sail assist propulsion on a cargo vessel. The system provides complete powered control of the amount of exposed sail, the angle of the sail in relation to the vessel, and clew outhaul and downhaul tens... | 02/19/1985 |
| 4500124 | Seal of the padlock type A seal of the padlock type comprising a plastic body having a pair of spaced apertures for receiving straight ends of a wire shackle. A metal fastener is assembled in the housing, said fastener having flexible tongues for so engaging the shackle ends that... | 02/19/1985 |
| 4492100 | Key for a lock of the plunger operated type A key for a lock of the plunger operated type in which an elongated housing has an internal axially movable plunger which releases locking elements when moved toward the open end of the housing, said key having a body with elongated fingers forwardly from... | 01/08/1985 |
| 4475365 | Electrical box lock assembly A housing for receiving a lock of the so-called "barrel-lock" type for locking the hinged cover of an electric meter box or the like. The housing comprises a support block for attachment to the meter box, and a housing hinged to the block. The housing car... | 10/09/1984 |
| 4460203 | Seal of the padlock type A seal of the padlock type comprising a plastic body having a pair of spaced apertures for receiving straight ends of a wire shackle. A metal fastener is assembled in the housing, said fastener having flexible tongues for so engaging the shackle ends that... | 07/17/1984 |
| 4446603 | Meter clamping ring A meter clamping ring for securing an electric meter housing of the type haing a peripheral mounting flange to a meter socket, comprising a clamping ring having ends with portions adapted to overlap to align lock receiving openings. One end is provided wi... | 05/08/1984 |
| 4441233 | Security seal with weakened portion in stud A security seal formed of a single piece of molded plastic and comprising an elongated strap having a socket at one end a stud at a medial portion, and a free end having an aperture to be received on the stud before the stud and socket are engaged. The se... | 04/10/1984 |
| 4432409 | Rotary heat regenerator wheel and method of manufacture thereof This invention provides a rotary heat regenerator which includes a regenerator wheel in which the regenerator matrix is formed of at least one strip of synthetic organic plastic wound onto a central hub, with suitable spacing means being formed in the str... | 02/21/1984 |
| 4426860 | Lock and key system of the plunger type A lock and key combination in which the lock is of the plunger operated type and the key has elongated resilient fingers with a mandrel for expanding the ends of the fingers in an engagable portion of the lock plunger. The head of the lock is provided wit... | 01/24/1984 |
| 4424995 | Ball type seal A security seal of the type having a housing with an opening to receive a flat strap type of shackle, in which the shackle has an aperture near the end, and said housing has internal means for engaging the shackle to prevent removal after the shackle is p... | 01/10/1984 |
| 4424454 | Electrical time switch An electrical timer switch for determining the times of day at which electricity is to be supplied to a load has different seasonal timing schedules and includes a selector circuit which selects the correct schedule in accordance with the season of the ye... | 01/03/1984 |
| 4394820 | Double action barrel lock A lock of the type having an elongated housing open at the rear end with internal operating mechanism to release locking means, in which the mechanism comprises a collar which is spring biased forwardly and a locking stem mounted in the collar and spring ... | 07/26/1983 |
| 4353583 | Seal of the padlock type A seal of the padlock type which has a plastic body with a pair of spaced cavities, and a U-shaped shackle having ends non-removably engaged in the cavities in which the ends in the cavities each have reversely bent portions, forming a bight, and the plas... | 10/12/1982 |
| 4341099 | Code changing system for combination padlocks A code changing mechanism for padlocks of the type comprising code wheels and lock operating bushings releasably connected to the code wheels in which axial movement of the shaft disengages the bushings from the code wheels to permit changing of the code,... | 07/27/1982 |
| 4331012 | Lockable meter retention ring Lockable meter retention rings for securing electric meters in meter boxes comprise an inner ring of multiple arcuate parts wherein the inner ring has spaced-apart inwardly extending flanges for holding the electric meter in the meter box and a steel oute... | 05/25/1982 |
| 4329860 | Front entry electric meter locking assembly A locking cover assembly for the ends of an electric meter retaining ring. The assembly comprises a U-shaped bracket for positioning between the downwardly turned ends of the retaining ring and over the bolt that retains the ends of the ring together. A h... | 05/18/1982 |
| 4328424 | Ionization detector chamber This invention is a smoke detector for giving a warning that a fire is imminent. The detector has an ionization chamber with a central electrode which is covered by insulation except at a restricted area closely spaced from a measuring electrode, a second... | 05/04/1982 |
| 4326740 | Security seal A seal for a pipe coupling such as is used to connect a gas meter to a gas supply line. The seal is made in two portions, which may be connected by a flexible web, and the portions have integral means for locking together around the nut of a coupling. Eac... | 04/27/1982 |
| 4326704 | Tipping machine A tipping machine of the type in which articles, such as credit cards, identification cards or the like, are secured by adhesive to a continuous sheet at predetermined spaced intervals on the sheet. A feeder initially positions the articles on the moving ... | 04/27/1982 |
| 4323294 | Meter socket cover assembly A meter socket jumper assembly comprising a plastic disc having a diameter and an edge thickness substantially the same dimensions as a meter of the type designed for assembly in said socket. Said disc is provided with a series of integrally molded pocket... | 04/06/1982 |
| 4319776 | Seal A security seal formed of a single piece of molded plastic in which a socket member and a stud member intended for locking engagement are disposed on the ends of legs so mounted on a base that the seal may be closed by squeezing the legs together with the... | 03/16/1982 |
| 4311354 | Meter disconnect adaptor A meter disconnect adaptor for assembly into a residential electric meter socket. The adaptor has a base with a peripheral configuration which allows it to be used with either a ringless type of meter box, or in a ring type of mounting, and has blade simu... | 01/19/1982 |
| 4296616 | Adaptor for plunger lock operating tool An adaptor for attachment to a plunger lock unlocking tool of a type which grasps the external surface of the unlocking pin of a plunger-type lock and pulls the pin to the unlocking position, said adaptor enabling the tool to be used to unlock a plunger l... | 10/27/1981 |
