By Engagement With Slot, Notch Or Protuberance Patents (Class 221/152)
  • Patent number: 5392951
    Abstract: A mechanical system opens a selected drawer in a multiple-drawer cabinet. The drawers are arranged in rows and columns. A selected drawer is unlatched by moving a rod which has protruding fingers, only one of which is positioned to engage a latch in a column of drawers. When the rod moves longitudinally, the selected drawer becomes unlatched. The unlatched drawer can open only to a distance determined by a cable which unwinds from a drum and passes around a pulley attached to the drawer. Thus, by controlling the rotation of the drum, the system can be programmed to open the drawer only to a distance which exposes the first non-empty compartment in the drawer. A computer controls the selection and opening of the drawers. The computer keeps a record of which compartments of each drawer have been emptied. Each time a drawer is opened, it is opened to the next non-empty compartment, allowing access to one and only one compartment in the drawer.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: February 28, 1995
    Assignee: Lionville Systems, Inc.
    Inventors: John F. Gardner, Jane F. Laycock, Eric C. Norlin, Shelly I. Slogoff, E. Ford Williams, Tobin H. Williams
  • Patent number: 5360134
    Abstract: A multiple-product merchandising machine having a cylindrical drum mounted within a cabinet. The drum is divided into a plurality of horizontal shelves each of which is divided by a plurality of vertical walls into separate compartments from which the product can be dispensed. These compartments can be brought into alignment with access doors associated with each level and the doors, which are normally maintained locked, can be opened upon the insertion of adequate currancy in the machine to remove the product. The access door locking system prevents more than one door from being opened at one time. The drum is rotatable in either direction by a reversible motor. A viewing area is provided in the front of the machine which allows a prospective customer to see the product as it passes by. The drum is divided into sections with opaque walls which prevent viewing from the viewing area of more than half of the compartments on a shelf when the drum is in its rest position.
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: November 1, 1994
    Assignee: Unidynamics Corporation
    Inventors: Leonard P. Falk, Paul K. Griner
  • Patent number: 5318195
    Abstract: The application discloses a device (10) to retrofit into the cabinet (11) of newspaper vending machine racks to prevent the removal of more than one copy of the newspaper for each vend or door opening of the cabinet (11). The single vend device (10) consists of a front panel (12) with a T-slot (14). The arms (14a) of the T-slot (14) are normally closed off with a pivoted closure plate (16). Consumer access to the newspapers is provided through the leg of the T-slot (14b), but the newspaper must be slid through the gap between the closure plate (16) and the front panel (12). The thickness of the gap is adjustable to selectively allow for the variation in thickness between various editions of the newspaper. The closure plate (16) is spring loaded to be biased to the closed position. Following removal of the paper, the closure of the plate (16) and a locking pin (32) prevents the plate (16) from re-opening. The locking pin ( 32) is disarmed upon closure of the cabinet (11) door (25a).
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: June 7, 1994
    Assignee: Kaspar Wire Works, Inc.
    Inventors: Alan P. Kahanek, Ralph J. Ullmann
  • Patent number: 5301831
    Abstract: The present invention comprises a one-at-a-time dispensing assembly for newspaper racks of tetrahedral shape in which the assembly is positioned within and spans the walls of the rack. The dispensing assembly of the invention includes a fixed support base subassembly fixedly positioned--in a vertical sense--adjacent to the lower edge of the rack opening, and a shaker subassembly. The base subassembly supports both a stack of newspapers and a planar member of the shaker subassembly. The shaker subassembly also includes a lever extending exterior of the rack below the lower edge of the rack opening actionably connected to the planar member. Purpose: to permit to-and-fro movement of the planar member supporting the stack of newspaper via corresponding movement of the lever.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: April 12, 1994
    Assignee: Harold D. Messner
    Inventor: Woodi N. Holmes
  • Patent number: 5285926
    Abstract: A multiple-product merchandising machine having a cylindrical drum mounted within a cabinet. The drum is divided into a plurality of horizontal shelves each of which is divided by a plurality of vertical walls into separate compartments from which the product can be dispensed. These compartments can be brought into allignment with access doors associated with each level and the doors, which are normally maintained locked, can be opened upon the insertion of adequate currancy in the machine to remove the product. The access door locking system prevents more than one door from being opened at one time. The drum is rotatable in either direction by a reversible motor. A viewing area is provided in the front of the machine which allows a prospective customer to see the product as it passes by. The drum is divided into sections with opaque walls which prevent viewing from the viewing area of more than half of the compartments on a shelf when the drum is in its rest position.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: February 15, 1994
    Assignee: Unidynamics Corporation
    Inventors: Leonard P. Falk, Paul K. Griner
  • Patent number: 5205424
    Abstract: There is disclosed a child resistant cap and container assemblage comprising a container and a cap member that is secured to the container so that it can not be removed without either breaking the cap member or damaging the seal that joins the cap member to the container. The cap member is provided with a nozzle having an internal locking means so that the contents of the container can not be accessed when the container is in its normal upright position. To access the contents in the container, the assemblage is titled to disengage the locking means enabling the nozzle to be opened and permitting a user to access the contents of the container using only one hand.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: April 27, 1993
    Assignee: Merck & Co., Inc.
    Inventor: Ruben C. Gaspar
  • Patent number: 5203472
    Abstract: A cigarette dispenser useful for aiding a person to stop smoking utilizes a movable belt for the controlled dispensing of cigarettes. The belt has openings therein which sequentially expose the open ends of cartridge compartments containing cigarettes to permit the cigarettes to be dispensed one at a time. A timing unit in the dispenser locks movement of the belt for periods of time during which the smoker is not permitted to smoke. Actual advancement of the belt is effected by the smoker at his leisure after receiving a signal signifying the end of the non-smoking period. The timing unit is in a controlled central processing unit capable of progressively increasing the duration of non-smoking periods during the course of the quitting routine.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: April 20, 1993
    Assignee: Longevity Products Corporation
    Inventors: Warren G. Levenbaum, David Anderson
  • Patent number: 5169027
    Abstract: A multiple-product merchandising machine having a cylindrical drum mounted within a cabinet. The drum is divided into a plurality of horizontal shelves each of which is divided by a plurality of vertical walls into separate compartments from which the product can be dispensed. These compartments can be brought into alignment with access doors associated with each level and the doors, which are normally maintained locked, can be opened upon the insertion of adequate currancy in the machine to remove the product. The access door locking system prevents more than one door from being opened at one time. The drum is rotatable in either direction by a reversible motor. A viewing area is provided in the front of the machine which allows a prospective customer to see the product as it passes by. The drum is divided into sections with opaque walls which prevent viewing from the viewing area of more than half of the compartment on a shelf when the drum is in its rest position.
    Type: Grant
    Filed: September 16, 1991
    Date of Patent: December 8, 1992
    Assignee: Unidynamics Corporation
    Inventors: Leonard P. Falk, Paul K. Griner
  • Patent number: 5143251
    Abstract: The application discloses a device (10) to retrofit into the cabinet (11) of newspaper vending machine racks to prevent the removal of more than one copy of the newspaper for each vend or door opening of the cabinet (11). The single vend device (10) consists of a front panel (12) with a T-slot (14). The arms (14a) of the T-slot (14) are normally closed off with a pivoted closure plate (16). Consumer access to the newspapers is provided through the leg of the T-slot (14b), but the newspaper must be slid through the gap between the closure plate (16) and the front panel (12). The thickness of the gap is adjustable to selectively allow for the variation in thickness between various editions of the newspaper. The closure plate (16) is spring loaded to be biased to the closed position. Following removal of the paper, the closure of the plate (16) and a locking pin (32) prevents the plate (16) from re-opening. The locking pin ( 32) is disarmed upon closure of the cabinet (11) door (25a).
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: September 1, 1992
    Assignee: Kaspar Wire Works, Inc.
    Inventors: Allen P. Kahanek, Ralph J. Ullman
  • Patent number: 5110009
    Abstract: A coin roll dispensing mechanism for use in dispensing coin rolls from a safe, the mechanism includes a coin roll dispenser for selectively distributing individual coin rolls, electrically operated solenoids to prevent operation of the dispenser and a first electrically operated combination entry device to disengage the solenoids. The safe door has a door handle, a plurality of bolts, a bolt works to manipulate the bolts, and electronic lock to restrict manipulation of the bolt works and a second electrically operated combination entry device to disengage the electronic lock. Upon entry of a first code sequence, the user can select a coin roll to be dispensed. To unlock the safe, a second code sequence is entered, which disables the electronic lock, allowing manual manipulation of the door handle.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: May 5, 1992
    Assignee: Alan K. Uyeda
    Inventors: Klaus W. Gartner, Alan K. Uyeda
  • Patent number: 5108006
    Abstract: A tablet dispensing container comprehending a tubular sleeve, a reciprocating element and a locking mechanism. The tubular sleeve forms the container and has two opposing openings therein; a dispensing opening in the lower end and a reciprocating element opening in the upper end. The reciprocating element is attached to the tubular sleeve and is biased toward the upper end. A user manually depresses the reciprocating element which forces the end with the tablet accommodating mechanism through the dispensing opening thereby dispensing a tablet. A locking mechanism prevents the reciprocating element from reciprocating when in a locked position. The locking mechanism permits reciprocation of the reciprocating element when in the unlocked position. The locking mechanism is adapted to remain in either the locked or the unlocked position until manually moved to the other position. Preferably, the locking mechanism includes a visual signal which indicates when the locking mechanism is in the unlocked position.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: April 28, 1992
    Assignee: The Procter & Gamble Company
    Inventors: Edward S. Tieke, Robert E. Dawson, Douglas W. Smith, John S. Gruver
  • Patent number: 5099999
    Abstract: An easy to use pill safety dispenser having few parts and which are easily manipulated even by persons with digital disabilities such as arthritis and paralysis. The dispenser consists of a axially arranged cylindrical pill container having a pill dispensing aperture in its sidewall and a row of slots or notches positioned at one end of the outer rim of the container. One notch is deeper than the others. A corresponding sleeve with a pill dispensing aperture is adapted to fit over the container which is rotatable and slidable and has a tang positioned near one of its ends which, when correctly rotated and slid into position, aligns both pill dispensing apertures and allows one or more pills to pass through.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: March 31, 1992
    Inventor: J. Lewis Balien
  • Patent number: 5062545
    Abstract: A dispensing mechanism for an automatic vending machine includes a conveying mechanism to move merchandise toward a discharge passage, and a discharge control mechanism. The discharge control mechanism holds the merchandise and prevents the merchandise from falling into the discharge passage when the dispensing mechanism is off. The discharge control mechanism includes a control plate which is biased to contact and hold the merchandise, and a locking element which prevents the rotation of the control plate when the dispensing mechanism is off. The engagement between control plate and locking element is controlled by a solenoid which permits the rotation of the control plate during the dispensing operation.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: November 5, 1991
    Assignee: Sanden Corporation
    Inventors: Toshiyuki Takamura, Kazunari Kurihashi, Masazumi Harada
  • Patent number: 5052584
    Abstract: A pill dispenser having two cylindrical main components that fit into one another, an inner concentric wall and an outer concentric wall displaceable relative to one another in a direction of a longitudinal axis of the pill dispenser. The outer concentric wall or the inner concentric wall has at least one recess and a counterpart is positioned on the other concentric wall so that the one main component of the pill dispenser is moveable within the recess upon actuation of the pill dispenser whenever the two main components are aligned in a suitable angular position with respect to one another.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: October 1, 1991
    Assignee: Firma Createchnic AG
    Inventor: Werner F. Dubach
  • Patent number: 5048717
    Abstract: A multiple-product merchandizing machine having a cylindrical drum mounted within a cabinet. The drum is divided into a plurality of horizontal shelves each of which is divided by a plurality of vertical walls into separate compartments from which the product can be dispensed. These compartments can be brought into alignment with access doors associated with each level and the doors, which are normally maintained locked, can be opened upon the insertion of adequate currancy in the machine to remove the product. The access door locking system prevents more than one door from being opened at one time. The drum is rotatable in either direction by a reversible motor. A viewing area is provided in the front of the machine which allows a prospective customer to see the product as it passes by. The drum is divided into sections with opaque walls which prevent viewing from the viewing areas of more than half of the compartments on a shelf when the drum is in its rest position.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: September 17, 1991
    Assignee: UniDynamics Corporation
    Inventors: Leonard P. Falk, Paul K. Griner
  • Patent number: 5042685
    Abstract: A medication dispenser that includes a receptacle having a counting compartment with a first opening into the receptacle and a second opening through which the pills are dispensed. To be dispensed, the pills must passthrough the counting compartment and are counted during such passage. Both openings are blocked or unblocked by logic built into or remotely connected to the dispenser, which logic determines whether the pills in the compartment should be dispensed. In one embodiment of the dispenser, the pills are counted by sensing the amount of light that is passed through the compartment. The logic counts the pills by subtracting the amount of light transmitted through the compartment when it contains pills from the amount of light transmitted through an empty compartment and comparing the result to the known size of the pills. In an alternative embodiment, the pills are weighed in the counted compartment and the weight is compared to the known weight of a single pill.
    Type: Grant
    Filed: August 10, 1989
    Date of Patent: August 27, 1991
    Inventors: Thomas S. Moulding, Jr., Donald G. Ellis
  • Patent number: 5024350
    Abstract: A dispensing apparatus for dispensing items from a plurality of dispensers in one or more vending or amusement machines includes a plurality of elongate support members each having a rotatably mounted support plate at one end. Items are releasably supported by the support member so that one item is dispensed from the free end of the support member for each complete revolution. A single drive gear motor operates all of the support members and is connected to each support plate via a series of driven rollers or pulleys and a continuous belt or chain extending around the rollers. Each driven roller is drivably connected to a respective one of the support plates via a clutch. A releasable stop mechanism is associated with each support plate for releasably engaging the plate to prevent it from rotating. An actuator controls release of the respective support plates for rotation through one revolution, and one or more selected plates may be released at any one time.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: June 18, 1991
    Inventor: Stephen P. Shoemaker, Jr.
  • Patent number: 5018644
    Abstract: A dispenser for the dispensing of individual tablets has a housing (1), a slide (3) displaceable with limited stroke, a tablet storage chamber with adjoining delivery chute (7), and front end closure surfaces and profiled flanks being developed, in part, fixed on the housing and, in part, on the slide (3). A moveable flank forms a separation chamber (A) and in the flank fixed on the housing has a separation finger (F) associated with the separation chamber. To obtain a structurally simple dispenser with optimal functioning and gentle treatment of the tablets, the separation finger (F) is formed by a bottom vertex (22) of a first oblique surface (I) which commences on top opposite an upper closure (23) of the separation chamber (A). A second oblique surface (II) is developed on the moveable flank (d), which surface, commencing at the upper closure (23) of the separation chamber (A), extends in upward direction, continuously increasing the cross-section of the delivery chute.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: May 28, 1991
    Assignee: Bramlage Gesellschaft mit beschrankter Haftung
    Inventors: Ludger Hackmann, Josef Wilken
  • Patent number: 5009328
    Abstract: An article cassette for a vending machine has a horizontal conveyor for supporting articles one behind another in a row behind an outfeed station and for feeding the articles step by step towards the outfeed station. The outfeed station at its forward end has an access opening provided with a cover mounted for rotation between a closed position and an opened position. In the opened position the cover provides access to the outfeed station for removal of an article therefrom. The cover also carries a screen for blocking off the outfeed station from the conveyor when the cover is opened, the screen being in the form of an extension at one end of the cover.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: April 23, 1991
    Inventor: Curt A. Bergsten
  • Patent number: 4981236
    Abstract: An anti-theft apparatus for use in a dispensing machine for newspapers and the like having a coin-operated locking access door. The apparatus includes a cover panel sized to mount within the access opening in the rack. The cover panel restricts access into the dispensing machine is through a T-shaped access opening in the cover panel. Newspapers and the like stacked within the dispensing machine may be grasped through the vertical slot in the T-shaped access opening and raised for removal through the horizontal slot in the opening along the axis of the horizontal slot. A pivoting gauge gate mounted to the cover panel above the T-shaped access opening restricts the thickness of newspapers and the like which may be removed through the hozizontal slot. The gauge gate pivots between an open position wherein newspapers and the like can be removed through the horizontal slot and a closed position wherein access through the horizontal slot is substantially restricted.
    Type: Grant
    Filed: May 3, 1989
    Date of Patent: January 1, 1991
    Inventors: Robert D. Riedle, Robert D. Riedle
  • Patent number: 4927051
    Abstract: A multiple-product merchandising machine having a cylindrical drum mounted within a cabinet. The drum is divided into a plurality of horizontal shelves each of which is divided by a plurality of vertical walls into separate compartments from which the product can be dispensed. These compartments can be brought into alignment with access doors associated with each level and the doors, which are normally maintained locked, can be opened upon the insertion of adequate currency in the machine to remove the product. The access door locking system prevents more than one door from being opened at one time. The drum is rotatable in either direction by a reversible motor. A viewing area is provided in the front of the machine which allows a prospective customer to see the product as it passes by. The drum is divided into sections with opaque walls which prevent viewing from the viewing area of more than half of the compartments on a shelf when the drum is in its rest position.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: May 22, 1990
    Assignee: UniDynamics Corporation
    Inventors: Leonard P. Falk, Paul K. Griner
  • Patent number: 4826041
    Abstract: A toothpick dispenser with an elevated base having opposite end mount pedestals that rest on a supporting surface with the elevated base mounting a toothpick box that is slideable back and forth between opposite end limited positions. One position is established by limit position contact of the box with one of the pedestals and a lock device mounted in the elevated base at the mount pedestal at the other end is movable into an end limit blocking position for the box when the elevated base is put down on a supporting surface. There are two toothpick dispensing grooves in the upper surface of the elevated base, one for each of the opposite end positions of the toothpick holding box with the back edge of each groove being rounded to prevent jamming up of the dispenser box by either square centered toothpicks or round centered toothpicks whichever is being dispensed.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: May 2, 1989
    Inventor: Ben A. Hunt
  • Patent number: 4809879
    Abstract: Method and apparatus for dispensing items are disclosed. A preferred dispenser (20) according to the invention includes a vend unit (24) suitable for placement in a small (e.g., four cubic feet) refrigerator (22). The vend unit (24) is preferably an all-mechanical device including a coin receiver mechanism (30) operatively coupled to four delivery doors (26) and associated levers (28). Upon insertion of the proper coinage within coin receiver mechanism (30), and movement of one of the levers (28), an associated slide member (54,56) is caused to move. This in turn enables one of the doors (26) to open, allowing access to an item from the selected group. When one of the slide members (54,56) moves, movement of the remaining slide members (54,56) is precluded by blocking pivots (90,162).
    Type: Grant
    Filed: September 30, 1986
    Date of Patent: March 7, 1989
    Assignee: Tifcor Corporation
    Inventor: James O. Hanley
  • Patent number: 4771912
    Abstract: There is provided an improved cassette particularly adapted for sowing seeds utilizing a plurality of adjacent stacked plates having a plurality of perforations therein. The perforations are adapted to receive seeds. The seeds in the perforations of each plate are held in place by portions of a lower adjacent plate. Adjacent plates are adapted to be moved relative to one another for a short distance for aligning the perforations thus permitting the seeds from an upper plate to pass through the perforations in the plates below it for planting.
    Type: Grant
    Filed: November 13, 1986
    Date of Patent: September 20, 1988
    Inventor: Aart van Wingerden
  • Patent number: 4767023
    Abstract: A dispenser for tablets is disclosed which protects against inadvertent dispensing, e.g., by children. The dispenser includes a housing forming a tablet storage compartment, a movable slide and an operating key for the slide mounted adjacent a wall of the housing. A detent blocks movement of the slide toward a discharge position. The detent is mounted on the housing remote from the operating key. The slide is moved by simultaneous movement of the detent and operating key.
    Type: Grant
    Filed: April 18, 1986
    Date of Patent: August 30, 1988
    Assignee: Bramlage Gesellschaft mit beschrankter Haftung
    Inventors: Ludger Hackmann, Josef Wilken
  • Patent number: 4474308
    Abstract: A tablet or pill ejector is disclosed consisting of at least three detachably secured sections in the general shape of a pen. The front end of the device is provided with a hole communicating with axially aligned bores formed longitudinally in the sections and through which a pill may be ejected quickly. An ejector rod is provided in the bores adapted to move from a cocked position to a released position wherein it passes instantly through a pill retaining member located in the front section of the device. Cocking and trigger mechanisms are provided. In an alternate embodiment the front section is provided with a revolvable barrel adapted to contain a plurality of pills for ejection. The rear end of the device may be provided with a storage compartment and cap.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: October 2, 1984
    Inventor: Michel Bergeron
  • Patent number: 4428502
    Abstract: A device for dispensing tablets, pills and the like includes an enclosure containing a first cavity to store a plurality of tablets, a second cavity disposed adjacent the first cavity and a second cavity including a dispensing wheel including slots to convey a predetermined quantity of tablets or pills to a discharge opening, a control knob placed adjacent the dispensing wheel for moving the dispensing wheel. The control knob has a knurled surface such that a manual locking arm included in the dispensing device can engage a groove of the knurled surface to prevent rotation of the control knob and inadvertent dispensing of the tablets.
    Type: Grant
    Filed: March 25, 1980
    Date of Patent: January 31, 1984
    Inventor: Douglas F. Veltri
  • Patent number: 4171752
    Abstract: An improved locking system for a vending machine of the type comprising a plurality of vertical magazines each consisting of an endless belt having a plurality of spaced trays thereon. A receiving tray mounted below each of the belts has a lock lever associated therewith. The lock lever is normally biased into a first position which prevents unauthorized rotation of the receiving tray to prevent the dispensing of a product held thereon. Rotation of the endless belt forward causes one of the trays thereon to engage the lock lever to move it to a second position to unlock the receiving tray and thereafter engages the receiving tray to pivot such tray to a dispensing position.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: October 23, 1979
    Assignee: Gross-Given Manufacturing Company
    Inventor: Raymond W. Pertinen
  • Patent number: 4042146
    Abstract: A machine for vending folded paper items, such as maps, including a housing having forward amd rear walls, at least one channel-shaped chute supported within said housing, the chute being adapted to contain the folded paper items to be vended, a sliding ejector at the bottom of the chute supporting the items and having teeth to engage one of the items for sliding forward movement therewith, an exit slot in the forward wall of the housing for discharging the said one item as a result of the forward sliding movement of the ejector, a drive device in the housing to slide the ejector rearwardly from a forward position to a rearward position, and a tension spring connected to the chute and the ejector to return the ejector from the rearward position to the forward position, the one item being engaged for said forward movement when the ejector is adjacent the rearward position and being positioned for removal from the housing when the ejector has returned to the forward position.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: August 16, 1977
    Inventor: Jack W. Nutter
  • Patent number: 4000800
    Abstract: An electromechanical interlock device is interposed between an electrical credit system and a mechanical product dispenser. In preferred form, the interlock device includes a solenoid electrically connected to the credit system, and a drive cam adapted to be positively rotated by the manually operated mechanical product dispenser. The interlock device also includes a locking arm spring loaded into locking engagement with the drive cam to prevent unauthorized rotation thereof, an activator arm connected to the solenoid and adapted to remove the locking arm from locking engagement with the drive cam, and a latch lever. The solenoid is electrically energized upon deposit of the coinage required to achieve vending of a product, the solenoid driving the activator arm and, hence, the locking arm, into the unlock position, thereby withdrawing the locking arm from interlock engagement with the drive cam.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: January 4, 1977
    Assignee: William F. Shepherd, Inc.
    Inventor: Wesley T. Loucks, Sr.