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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7264195 | Barbed wire installing system using all terrain vehicle (ATV) A barbed wire installation mechanism is provided that is supported on an ATV rack with one or more poles extending vertically from the ATV rack onto which one or more barbed wire spools are placed. The mechanism includes a base plate to which the poles are attached.... | 09/04/2007 |
| 6479772 | Sealing machine having a safety shut off mechanism A safety shut off mechanism for a sealing machine includes a housing having a front board, and a door panel rotatably secured to the front board and rotatable between an outward position, an inner position, and an intermediate position. A switch member ma... | 11/12/2002 |
| 6325195 | Machine safety guard A machine safety guard unit system having a flexible panel moved upwards and downwards between track members with the system positioned between the operative parts of a machine and a machine operator, such panel when closed protecting the machine operator... | 12/04/2001 |
| 6234291 | Safety device for a workshop machine A safety device for a workshop machine contains a safety screen which is equipped with a powering device in order to lower the screen before the machine starts to operate. The powering device contains friction rolls on opposite sides of the screen and are... | 05/22/2001 |
| 6148985 | Safety device on metal-forming machine tools The invention concerns a safety device on metal-forming machine tools, in particular on pneumatic pressing machines, used in the execution of short-stroke pressing processes, for preventing intervention in the danger zone during the tool working movement ... | 11/21/2000 |
| 5832825 | Safety device in a zone for infeeding a web of material into a folder Safety device for an infeed site of a web of material into a roller nip in a processing device on a printing press includes cover elements movably mounted on the processing device for nearly completely covering the infeed rollers in operating positions of... | 11/10/1998 |
| 5617987 | Safety guard for fiber processing unit A safety apparatus for use with a fiber processing unit having a plurality of rotating godet rollers. The apparatus includes a safety gate, positioned between an operator and the godet rollers, having a plurality of apertures through which a long-handled ... | 04/08/1997 |
| 5538490 | Safety bar mechanism and sheet processing device having a safety bar mechanism A safety bar mechanism and sheet processing device having a safety bar mechanism, with which such an accident that the operator's hand is pinched between a table and peripheral devices etc. can be positively avoided whatever direction an external force ex... | 07/23/1996 |
| 5012912 | Safety interlock/latch assembly for a printing press A safety interlock/latch assembly for use on a printing press having at least one safety latch (100) and one guard element (102). At least one lockable pivot device (106, 116) for allowing rotation of the guard element (102) is attached to a first end (10... | 05/07/1991 |
| 4858747 | Drive motor controlling device for a material transporting conveyor A conveyor is shown having an endless material transporting member running between an idler sprocket at one end and a drive sprocket at the other, both supported in a frame of the conveyor. A drive motor is used to drive the drive sprocket, and hence the ... | 08/22/1989 |
| 4764835 | Safety apparatus A box designed for holding safety apparatus, such as face and eye protecting shields used in conjunction with grinders and the like, is electrically wired to such grinder or similar shop equipment. When the face and eye protector is stored within the box,... | 08/16/1988 |
| 4687088 | Cubicle for machining centers The object of the invention is a cubicle for machining centers, consisting of a front one or multipart face wall and stationary or multipart side walls (11, 12), which can be designed to be like sliding doors. In order to prevent damage to the side walls ... | 08/18/1987 |
| 4611703 | Safety lock for rotating machinery An apparatus for preventing the opening for one or more access doors to rotating machinery which is confined in some form of enclosure. A shaft from the machinery extends through the enclosure and has a disc attached to it. The disc has one or more radial... | 09/16/1986 |
| 4498567 | Perimeter guard for a machine A perimeter guard for a machine wherein a plurality of vertical posts are spaced about a machine. Each post is H-shaped and has lateral flanges projecting from it to create vertical channels on each side of the post. A transparent window is slidably mount... | 02/12/1985 |
| 4398435 | Self-positioning and self-adjusting press guard An improved safety device or guard for use upon a press or other machine, which has a work zone for receiving a work piece, is provided to protect the operator. The guard has a base with sloped surfaces leading to the work area and slidable gates position... | 08/16/1983 |
| 4392771 | Lift safety switch system An electrically controlled hydraulic lift, such as wheelchair lifts for vehicles, wherein the hydraulic reciprocating motor for operating the platform of the lift is mounted in a vertical slot so that any obstruction in the downward movement of the platfo... | 07/12/1983 |
| 4371069 | Safety interlock A safety interlock between a machine guard and a machine actuator, comprising locking means for the guard and locking means for the actuator, the guard locking means being arranged, upon closing of the guard, to engage and thereby release the actuator loc... | 02/01/1983 |
| 4362196 | Power tool table with safety shut-off A table for supporting an electric power tool is provided with a safety shut-off device. A bar is pivotably mounted on the side of the table and a shut-off switch is mounted to the table behind the bar. The bar is biased away from the shut-off switch by a... | 12/07/1982 |
| 4357839 | Machine safety guard Operator access to the zone at which workpieces are struck in a drop hammer is temporarily but reliably blocked by a sturdy mechanical guard throughout every period when the hammer may commence and complete its fall; a unique physical linkage, between the... | 11/09/1982 |
| 4307798 | Safety device for press The invention is related to a safety device for a press machine or the like. The safety device includes a first guard plate which slidably extends over the machine access area and is powered by an air cylinder having a movable rod connected to a movable a... | 12/29/1981 |
| 4282963 | Barrier guard A barrier guard for use with a winding machine or the like to prevent inadvertent access by the operator to a nip established between two cooperating rolls. The barrier guard includes first and second generally U-shaped guard bars, the second guard bar be... | 08/11/1981 |
| 4266492 | Lacing machine needle guard A protective guard arrangement to lessen the likelihood of a lacing machine operator receiving injury from a lacing machine while performing a stator assembly operation is disclosed including a sleeve-like guard open at opposite ends and pivotally attache... | 05/12/1981 |
| 4179987 | Safety apparatus for a bacon press or the like Safety apparatus for a bacon press or the like including a transparent safety door movable vertically between a raised retracted position in which a slab of bacon or other work to be pressed may be readily placed in the press and in which a pressed slab o... | 12/25/1979 |
| 4152053 | Film inspection machine An apparatus for inspecting motion picture film so as to locate edge cuts and tears, sprocket hole tears, improper splices and tape fragments or other objectionable foreign material on the film surface, which apparatus comprises a supporting frame with a ... | 05/01/1979 |
| 4129048 | Power press guard In accordance with the present invention a power press or tool guard is provided. The guard includes a first generally vertical protective portion which is made of a protective material which is at least partly transparent through which the operator may v... | 12/12/1978 |
| 4091906 | Collapsible safety guard for platform lift A collapsible electric foot-toe guard is employed with a loading platform having electric controlled lift and descent movements, functioning as a safety device in the protection against unwitting protrusion of human limbs into the path of descent of the p... | 05/30/1978 |
| 4071128 | Apparatus for shielding moving parts in fluid-operated machines A blow molding machine wherein a shield is movable to and from an operative position in which it prevents access to the mold sections. The hydraulic motors which move the mold sections can receive pressurized fluid only when the shield is locked in the op... | 01/31/1978 |
| 3987881 | Safety guard A safety guard for a machine tool, such as a punch press, having an operating part, such as a ram, having a control member. The guard comprises gates between the operating part and a machine tool operator. One of the gates is slidable across the front of ... | 10/26/1976 |
| 3986281 | Safety system for pressers A safety system for garment pressers which have a head movable against a buck with a garment therebetween and steam vents opening through the head and buck, the safety system being operable to deactivate the press and raise the head in the event the opera... | 10/19/1976 |
