Abstract: A lead cartridge adapted for storing leads and capable of being detachably connected to a lead feeding mechanism of a mechanical pencil to supply the leads one by one to the lead feeding mechanism, the mechanical pencil being provided with an interference part, the lead feeding mechanism being provided with a receiving part. The lead cartridge includes a tank part for storing the leads, a tip end connection part capable of being detachably fitted with the receiving part of the lead feeding mechanism, a lead port provided on a tip end side of the tank part to allow one of the leads in the tank part to pass from the tank part, and a swing cover arranged in the lead cartridge to be swingable between a closing position where the swing cover closes the lead port, and an opening position where the swing cover opens the lead port.

Abstract: A writing instrument includes a hollow elongated body with a tip disposed proximate a bottom end portion of the body, a removable cartridge for containing elongated writing material, and an advancing mechanism for incrementally advancing the writing material into and outwardly beyond an opening in the tip. The cartridge can be inserted into and removed from an opening in the writing instrument body. The cartridge does not move with respect to the body when the writing material is advanced by the advancing mechanism. The cartridge includes a cartridge body with a writing material outlet hole, and can include a lid with a lid hole and a bumper portion. The lid can be configured to slide between a closed position, covering the outlet hole, and an open position, not covering the outlet hole. In the open position, writing material may exit through the outlet hole and advanced toward the tip by the advancing mechanism.

Abstract: A lead cartridge that is provided with a tank part for storing leads and is capable of being detachably connected to a receiving part provided in a lead feeding mechanism of a mechanical pencil to supply a lead can reduce costs for manufacturing the lead cartridge and the number of manufacturing steps and can prevent a lead from falling out from the lead cartridge inadvertently. The lead cartridge 10 includes a case 12 and a swing cover 14. A tank part 12a is defined inside the case 12 and the tip end part of the case 12 is formed with an open tip end connection part 12b. Between the tank part 12a and the tip end connection part 12b, a lead port 12e is formed. The swing cover 14 is mounted in the case 12 swingably to a closing position where the swing cover 14 closes the lead port 12e and to an opening position where the swing cover 14 opens the lead port 12e.

Abstract: A mechanical crayon pen with an internal cartridge to hold multiple crayon sticks has a transparent barrel (10) with an open top, an inner diameter and an inner surface, a thrust device (20) mounted inside the transparent barrel (10) and a thrust actuator (30) mounted on the open top of the transparent barrel (10). The thrust device (20) has an inner tube (21) movably mounted inside the transparent barrel (10). The inner tube (21) has an outer surface and an outer diameter smaller than the inner diameter of the transparent barrel (10) to form a space (13) in the mechanical crayon pen to store multiple crayon sticks. Multiple longitudinal grooves may be defined in the inner surfaces defining the space (13) to hold individual crayon sticks.

Abstract: A side knocking-type writing instrument has a barrel having a longitudinal axis, a front end, and a rear end. A sliding member is disposed in the barrel for undergoing forward and rearward sliding movement along the longitudinal axis of the barrel. The sliding member has a shoulder comprised of a generally L-shaped side wall having a first wall portion extending along the longitudinal axis and a second wall portion extending transversely to the longitudinal axis. A knocking member undergoes pivotal movement in a direction transverse to the longitudinal axis of the barrel about a fulcrum point disposed at a rear portion of the knocking member. The knocking member has a pressing portion disposed at a front portion thereof. A linking pawl is disposed between the knocking member and the sliding member for undergoing pivotal movement therebetween and axial movement along the longitudinal axis.

Abstract: A side knock-type mechanical pencil comprises: a barrel, a push member supported on the side wall of the barrel, and a sliding tube longitudinally slidably inserted in the barrel so as to correspond to the push member and internally provided with a lead passage. An angular cam portion formed in a middle portion of the sliding tube has a stepped surface consisting of a high slope and a pair of low slopes. The pair of side members of the push member touch the pair of low slopes in the initial stage of the pushing operation, and the top member which joins the pair of side members the high slope in a final stage of the pushing operation. The axis of a back portion is displaced from the axis of the barrel to a side opposite the side of the push member. A funnel-shaped lead receiving portion is formed integrally with the back portion at the back end of the same.

Abstract: A lead dispensing storage container that can be opened or closed by a single hand. The container body has a lead case formed therein, and a lead outlet allowing release of leads one by one. A gate member mounted in the container body can be moved to open or close lead paths between the lead case and lead outlet. An elastic arm portion forces the gate member to move in direction to close the lead paths. The number of parts is reduced, and supplying leads can be made easier by a case that has a lead supply opening projecting from the tip thereof. A leading end of the case has an inclined slope toward the lead supply opening therein, and a chuck containing leads having a knocking portion that is pressed into the case so that it can be opened by the knocking portion being pushed to press an opening actuator toward the inclined slope or is closed by an elastic force as the opening actuator is released.

Abstract: A knock-out type mechanical pencil which comprises a lead containing tube in which the inner and outer walls thereof are so tapered that the lead inlet thereof is larger in diameter than the opposite end thereof. The mechanical pencil further comprises a spring supporting ring interposed between the clamping ring so attached to the outer periphery of a chuck portion integrally formed with the lead guide of the lead containing tube and spiral springs to oppose with the base end of the ferrule within the outer barrel for urging the spring supporting ring to the ferrule. Thus, this mechanical pencil can eliminate the lead jams in the lead containing tube and lead breakage therein.

Abstract: A lead cartridge for a mechanical pencil, provided with an openable capping structure. The openable capping structure is fixedly joined to the open end, namely, the front end, of the lead cartridge so as to engage the lead guide of the mechanical pencil when the lead cartridge is inserted in the mechanical pencil. The openable capping structure opens a lead passage formed therein when engaged with the lead guide and closes the lead passage when separated from the lead guide to prevent the leads contained in the lead cartridge falling off the lead cartridge.

Abstract: A mechanical pencil is disclosed in which lead can be advanced in one of two ways; either automatically upon release of writing pressure on the pencil, or selectively manually by pressing inwardly against a side push button. The pencil includes an outer cylinder with a side pushing hole formed therein, and a side push button movably disposed in the side pushing hole. The side push button contacts a lever which is totally mounted within the outer cylinder and which contacts a lead advanced mechanism. Upon pressing in of the side push button, the lever is pivoted about its axis and caused to press downwardly against the lead advance mechanism to thereby cause advancement of a lead. Advancement of lead is also performed upon release of writing pressure of the pencil by way of a slider mechanism which is biased outwardly by way of a resilient member and which is forced outwardly by the resilient member upon release of writing pressure.

Abstract: A mechanical pencil includes a tube-like housing having lead cavities annularly provided around an operating central rod. Leads from the cavities are discharged into a lead guiding passage through a rotary lead discharge member which is provided above the lead guiding passages and has a lead discharge passage. The lead discharge member is cooperatively associated with the rod so as to turn, upon depression of the rod, between a first position in which the lead enters the lead discharge passage from one of the lead cavities and a second position in which the lead enters the lead guide passage from the lead discharge passage.

Abstract: A recorder with a pencil pen which contains a plurality of pencil leads therein comprises means for causing a lead chuck mechanism of the pencil lead to hold and release the pencil lead and means for vertically moving a pencil lead displacement mechanism of the pencil pen. Those means are alternately activated by lead feed/eject means to eject a consumed unnecessary pencil lead and drive out a new pencil lead and hold it at a recording position. Since the pencil leads can be automatically ejected and driven out, a recording efficiency is improved and long period continuous recording is attained with a single pencil pen. A lead feed/eject holder is provided to eject a residual lead of the pencil pen, and a processing unit for processing the ejected residual lead is provided. Thus, the recording efficiency is further improved.

Abstract: The present invention provides an automatic pencil which includes a coil spring sleeved around an inner tube, and a ring-shaped head portion carrying a lead pushing leg, the ring-shaped head portion being seated on an annular shoulder formed in the lower cone-shaped end of an outer casing, and the lead pushing leg begins to extend downward from the ring-shaped head portion at a location beyond the inner edge of the annular shoulder, thereby eliminating the need to provide a groove for receiving the upper side of the lead pushing leg.

Abstract: A trim control 100 providing a weight distribution compensator to a riding power trowel 1. The trim control 100 has hollow cylindrical housing 101 rigidly attached to riding power trowel frame 3. Cylindrical housing 101 has traveler slot 102 disposed in its side parallel to the cylindrical housing's longitudinal axis. A cylindrical traveler block 110 is slidably inserted into cylindrical housing 101. Traveler block 110 has a threaded coaxial bore 111 disposed in a first end for receiving a threaded second end 105 of control bolt 103. A stop dog 112 is radially attached to cylindrical traveler block 110 through and extending radially outward from traveler slot 102. Thrust bearing 107 and shoulder bearing 108 are coaxially inserted and attached to a first end of hollow cylindrical housing 101. A radially disposed threaded through hole is provided in housing 101 and shoulder bearing 108 for receiving allen head set screw 109.

Abstract: A lead cartridge opening and closing unit wherein outward engaging piece portions are provided on a chuck type opening and closing mechanism which is divided into sections in the diametrical direction and has inward elastic force and which is further disposed on the lead cartridge; the outward engaging piece portions moving inwardly against the inward elastic force along the diametrical direction thereof thereby to open lead conducting holes in case of forcible insertion into and engagement with a lead guide, while the outward engaging piece portions being restored by means of the inward elastic force to move outwardly along the diametrical direction thereof thereby to close the lead conducting holes in case of release for the forcible insertion and engagement; whereby when the outward engaging piece portions of the chuck type opening and closing mechanism are forcibly fitted in the lead guide, the outward engaging piece portions move inwardly along the diametrical direction thereof to be resiliently fitted t

Abstract: A lead delivery mechanism is integrally composed of a lead chuck for biting lead fitted to the extreme end of a lead pipe, sleeves abutting upon a chuck clamping ring loosely fitted to the head portion of the lead chuck, a spring member for clamping the chuck disposed resiliently between the sleeves and the lead pipe, and a locking ring locked loosely with the lead chuck to lock the rear end of the spring member, whereby such lead delivery mechanism may be handled as a block in assembly operations for mechanical pencils.

Abstract: A mechanical pencil having an exchangeable lead storing container has a feeding mechanism provided at one end with a coupling pin which snugly fits a coupling recess formed in the storing cartridge. The feeding opening connecting the interior of the cartridge with the central passage in the coupling pin has normally a smaller diameter than that of leads stored in the cartridge, and only upon completing the coupling the pin enlarges the feeding opening to such an extent that the stored leads can freely pass one after the other into the feeding mechanism of the pencil.

Abstract: An improvement in the mechanical pencil of the type shown in U.S. Pat. No. 4,320,982. The improved mechanical pencil has a tubular outer casing, a coil spring disposed within the outer casing and an inner tube slidably inserted through the outer casing and the coil spring, the inner tube being adapted to store therein a plurality of presharpened lead pieces and having a conical shaped head formed at its lower end, the conical head being provided with two slots to form into a pair of clamping halves for clamping and releasing the presharpened lead pieces. The coil spring, which is adapted to urge the inner tube upwards, has a lowermost coil provided with a straight tail extending from the lowermost coil inwardly and downwardly at a predetermined angle with the longitudinal center axis of the coil spring, to fit into one of the two slots of the conical shaped head of the inner tube, with the tip of the tail being arranged to abut the rear end of the lead piece clamped by the clamping halves.

Abstract: A mechanical pencil is constructed of (a) a decorative barrel to be held by a user; (b) a lead-feeding mechanism disposed within the decorative barrel; (c) a lead guide connected to the lead-feeding mechanism; and (d) a lead-containing cartridge having an outer diameter substantially equal to the inner diameter of the decorative barrel and held detachably in the decorative barrel. The mechanical pencil according to the present invention can be continuously used by simply replacing a used-up cartridge with a fresh cartridge containing a plurality of writing leads. Thus, it is unnecessary, different from conventional mechanical pencils, to insert a fresh supply of writing leads one by one into the mechanical pencil. Since a user is not required to touch writing leads directly, his hands are not smeared.

Abstract: A mechanical pencil comprising a lead feed mechanism built within the body thereof and a lead guide connected to the lead feed mechanism and having a cartridge reception bore of a diameter which is practically the same as the inside diameter of the body, wherein a cartridge containing a plurality of leads and having an outside diameter which is practically the same as the inside diameter of the body and the inside diameter of the cartridge reception bore of the lead guide is detachably fitted in the cartridge reception bore of the lead guide. In replenishing the mechanical pencil with leads, an old cartridge is replaced with a new cartridge.

Abstract: A knock-type propelling pencil, of which a lead casing is made in the form of a cartridge so that supply of new spare leads can be completed by only inserting the cartridge accommodating the given leads into lead cylinder in outer cylinder and thereby making the operation of supply of the new spare leads easier.

Abstract: This invention relates to a writing implement comprising an outer casing, a coil spring disposed within the casing, an inner tube inserted through the coil spring and having a plurality of presharpened pieces of pencil lead stored therewithin, and a capping member fitted over the open end of the inner tube. The lower (writing) portion of the inner tube is split into two clamping halves. The lower end of the coil spring is formed into a hook which slides along the slot formed between the clamping halves to allow the expelling and feeding of presharpened pieces of pencil lead into the space between said two clamping halves.

Abstract: A mechanical pencil of the type having a push-button lead-feeding mechanism is provided with a space into which a replaceable cartridge containing leads can be inserted. The cartridge has a lead outlet opening which is blocked by a closure that is moved out of the way upon such insertion so that the leads can thereupon move sequentially into the lead-feeding mechanism, permitting a user to write until all leads in the cartridge are used up.

Abstract: This invention relates to a writing implement comprising an outer casing, a coil spring disposed within the casing, an inner tube inserted through the coil spring and having a plurality of presharpened pieces of pencil lead stored therewithin, and a capping member fitted over the open end of the inner tube. The lower (writing) portion of the inner tube is split into two clamping halves. The lower end of the coil spring is formed into a hook which slides along the slot formed between the clamping halves to allow the expelling and feeding of presharpened pieces of pencil lead into the space between said two clamping halves.

Abstract: A mechanical pencil of the type having a pushbutton lead-feeding mechanism is provided with a space into which a replaceable cartridge containing leads can be inserted. The cartridge has a lead outlet opening which is blocked by a closure that is moved out of the way upon such insertion so that the leads can thereupon move sequentially into the lead-feeding mechanism, permitting a user to write until all leads in the cartridge are used up.

Abstract: A mechanical pencil includes a casing, a chuck for holding a lead, a lead passage connected with the chuck, a lead cartridge and a push button for advancing the lead. A cylindrical body is connected to the lead passage. The cylindrical body and the lead cartridge have guides so that the both may be snuggly and accurately engaged with each other in accordance with the diameter of leads which are used in the pencil.

Abstract: A magnetic writing implement comprises a tubular casing with a writing unit which is frictionally interfitted with the conical end of the casing, a storage tube slideably engaged within the casing for storing a plurality of writing units therein, an ejector and a push tube connected with the front end and rear end of the storage tube, respectively for ejecting the writing unit from the conical end of the casing as its writing point becomes blunt for replacement by a sharpened unit, and a stopper inserted in the rearmost portion of the push tube to prevent the stored writing units from slipping out of the tube. Each writing unit carries a sharpened lead pencil element or the like at its front portion and includes a piece of magnet at its rear end. The ejector and the stopper also contain a piece of magnet at each of their front ends.

Abstract: This invention relates to a writing implement comprising an outer casing, a coil spring disposed within the casing, an inner tube inserted through the coil spring and having a plurality of presharpened leads stored therewithin, and a capping member inserted over the open end of the inner tube. The front (writing) end of the inner tube is split into two clamping halves. The front end of the coil spring is formed into a hooked portion which slides along the slot formed between the clamping halves to allow the expelling and feeding of presharpened lead pieces into the clamping halves.