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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 4660906 | Lamp holder assembly having rotatable base shell A lamp holder assembly for use with an incandescent fixture includes a first housing having a central body portion and a protruding portion surrounded by a base shell consisting of an insulative second housing and an electrically conductive shell. A first... | 04/28/1987 |
| 4654557 | Lamp holder assembly having rotatable base A lamp holder assembly for use with an incandescent fixture includes a base that provides a predetermined amount of rotational movement relative to the housing to allow proper orientation of the assembly with respect to the incandescent fixture. In one em... | 03/31/1987 |
| 4652068 | Self-lighting security hang-up device The present invention is related to a hang-up device of the type comprising a metallic suspension rail and hooking-on sliders. It is characterized in that it comprises at least two electrically conductive rails supplied with low-voltage current and isolated fr... | 03/24/1987 |
| 4650265 | Illuminating lamp assembly for retrofitting an exit sign An illuminating lamp assembly (20,20') for supporting fluorescent tubes in an exit sign (10) including a body (22) for supporting a pair fluorescent tubes (24) and an electrical connector (26) rotatable about a first axis for threadedly engaging an electr... | 03/17/1987 |
| 4624513 | Lamp holder assembly having rotatable base shell A lamp holder assembly includes a first housing having a central body portion and a protruding portion surrounded by a base shell and a retainer member secured to the protruding portion of the first housing. A means for permitting a predetermined amount o... | 11/25/1986 |
| 4473869 | Luminaire with resilient sleeve and band connection Luminaire comprising a base in which there is an opening, and a lamp housing having a projecting tubular wall portion which is detachably lockable in the opening of the base and is rotatable therein around its longitudinal axis. In accordance with the inv... | 09/25/1984 |
| 4437716 | Electrified wall panel system A power distribution system for an open office, space dividing, wall panel system wherein electrical power is transferred from one space dividing wall panel to another through a connecting post cap. Each panel includes a terminal block at each upper corne... | 03/20/1984 |
| 4413870 | Pivotable spark plug connector A pivotal spark plug connector (10) has a wire clamp part (12) and a spark plug terminal receptacle part (16) pivotably connected together and held in a desired position by a position-retaining mechanism (18) including a pair of substantially planar, circ... | 11/08/1983 |
| 4405877 | Variably positional lamp holder assembly A variably positional lamp holder has a base that provides for limited rotational movement relative to the lamp holder body to allow projecting arms on the body to be positioned to allow mounting freedom for a harp.... | 09/20/1983 |
| 4382647 | Swivel unit for adjustable lighting fixture This disclosure depicts a novel environmentally sealed and manually controlled swivel unit for use in an adjustable lighting fixture. The swivel unit comprises a base for establishing electrical and mechanical connection with a source of electrical power ... | 05/10/1983 |
| 4241667 | Grounded railway center plate liner A grounding arrangement for railroad car center plate assembly bowl liners of the all polymeric type in which the liner is equipped with a grounding device formed from a strip of beryllium copper to define a generally U shaped contact spring having a lowe... | 12/30/1980 |
| 4214143 | Conductor connector in flash welding apparatus In a flash welder, instead of using a flexible conductor, the electrical connection to the moveable electrode table is made by a connecting conductor which is slidably connected both to the moveable electrode table and the secondary of the welding transfo... | 07/22/1980 |
| 4195331 | Lamp changing module A lamp changing module for totally enclosing a lamp when the module is withdrawn from a support such as an illuminator cabinet, and permitting exposure of the lamp when properly installed and connected to the support. A potentially explosive lamp is there... | 03/25/1980 |
| 4177869 | Swivel joint for a vehicle The invention concerns a vehicle of the type comprising a mobile carrier, a pedestal mounted thereon for rotation about a vertical axis, and a swivel joint connected between the pedestal and the carrier and through which energy is transmitted. The swivel ... | 12/11/1979 |
| 4030791 | Electrical contact system The present invention provides a system for supplying electrical current from a printed circuit board to an electrical motor rotatably positioned in an insulating housing. More particularly, the system includes two pair of cell contact members and two pai... | 06/21/1977 |
| 3961502 | Safety ring A safety ring for a stop mechanism of a knitting machine has an electrically conductive bar arranged in a circle passing through several electrically insulating rings. Each insulating ring has a stiff wire connected to it and clamped to the frame of a kni... | 06/08/1976 |
| 3940198 | Integral multifinger contact and method of making An integral multifinger contact with each finger being capable of flexing independently of one another while maximizing the number of independent finger contacts along a given contact line. The method involves the shearing of finger portions and elongatin... | 02/24/1976 |
| 3932015 | Support means for an electrically operated tool A handle for an electrically-operated hand-held tool such as a hedge trimmer is formed with a body having similar terminals at its opposite axial ends. The handle body can make a plug-and-socket connection with the tool housing in any chosen one of a numb... | 01/13/1976 |
