U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 6293874

User-operated amusement apparatus for kicking the user's buttocks

An apparatus including a user-operated and controlled apparatus for self-infliction of repetitive blows to the user's buttocks by a plurality of elongated arms bearing flexible extensions that rotate under the user's control.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 338/89 - Mathematical function (e.g., sine-cosine potentiometer)


Subclass of Class 338 - Electrical resistors
Definition: Subject matter wherein, in the variable resistor, a definite
No. of patents: 20
Last issue date: 02/21/2006


NumberTitleIssue Date
7002114Methods and apparatus for a variable resistor configured to compensate for non-linearities in a heating element circuit
An improved variable resistor at least partially compensates for non-linearities in an electrical circuit containing a heating element, for example, a thin-film heating element. A controllable heater includes a heating element, a voltage source (for example, a stand...
02/21/2006
6342829Accelerator opening degree sensor
A sensor comprises a linear region (variable region) in which the output voltage is changed in proportion to the accelerator opening degree, and a stepped region (invariable region) in which the output voltage is not changed with respect to the accelerato...
01/29/2002
5923159Logarithmic taper resistor with zero crossing changes
A digital potentiometer capable of being connected directly to an electronic switch is disclosed. The digital potentiometer for example may utilize a 64 step resistor array, which would then have 64 steps. Each of the steps have precise values so as to ac...
07/13/1999
5631623Chip-type variable resistor
A chip-type variable resistor is provided which includes an insulating substrate formed with a resistor strip which is arcuate at least partially and has both ends electrically connected to respective extremity electrode terminals, an intermediate termina...
05/20/1997
5594408Potentiometer
A digital potentiometer adapted for and connected to and interacting directly with a plurality of external switches. Specifically, the various wiper points of a semiconductor resistor array are selected, for each channel of an audio amplification device a...
01/14/1997
5565785Potentiometer calibration method
A calibration method for a potentiometer which provides indicia reflecting an accurate indication of actual electrical resistance throughout the resistive range of a particular potentiometer. The indicia includes a number of graduation marks or symbols ha...
10/15/1996
5229742Joystick
A control stick is supported in an outer case such that it can be swung in two orthogonal directions. A moving member is fitted to the lower portion of the control stick through a coil spring. The lower end of the moving member is urged by the coil spring...
07/20/1993
4983973Non-linear analog-to-digital converter
A first film disposed in a first direction on an integrated circuit chip and having uniformly spaced taps provides progressively increasing resistance values. A second film disposed on the chip in a direction opposite to the first direction at a position ...
01/08/1991
4928102Flash analog-to-digital converter with logarithmic/linear threshold voltages
A plurality of equally spaced terminals may be disposed at a side edge of a substantially uniformly resistive thin film. A reference potential (e.g. ground) may be applied to the second side of the film. An energizing voltage may be applied at the junctur...
05/22/1990
4682099Logarithmic potentiometer circuit
An inexpensive potentiometer circuit having an approximately logarithmic characteristic that can be accurately determined is obtained if a resistance element having a linearly adjustable ohmic resistance value is connected parallel to a negative impedance...
07/21/1987
4516107Function generators
The invention provides new potentiometer-type function generators that have (1) a resistance element having a two-dimensional contact surface with boundaries arranged so that a non-uniform voltage distribution is produced when the resistance element is el...
05/07/1985
4447747Waveform generating apparatus
Waveform generating apparatus for synthesizing a non-linear waveform by sampling voltage levels along a series string of resistances. The series string of resistances is a linear resistance fabricated in a monolithic integrated circuit structure and inclu...
05/08/1984
4418474Precision resistor fabrication employing tapped resistive elements
Thin film resistors (FIG. 1) are produced on flexible tape 1 to provide at low cost a very wide range of precision resistors having low inductance. A reel of tape 70 coated with resistive material is etched to create a plurality of sinuous resistor patter...
12/06/1983
4283704Variable resistor
In a variable resistor of the type wherein there is formed on an insulating substrate a resistive member having wide portions and narrow portions in the sliding direction of a slide member and ends thereof wired respectively to a ground terminal and an in...
08/11/1981
4243969Layer resistor element
A layer resistor element for use in a variable resistor has two resistance layers disposed upon each other on an insulating substrate, the lower resistance layer being provided with two comb-like sets of separating slots extending from opposite sides to f...
01/06/1981
4161679Cam program controller systems
A cam program controlled system providing a continuous set point signal representing a time function relationship using an impulse or stepping drive motor. The drive motor impulses are electronically derived; and therefore, the system's time base or speed...
07/17/1979
4125781Christmas tree lighting control
This invention relates generally to ornamental lighting controls and particularly to a lighting control for Christmas tree lighting having preferably at least four duty cycle outputs and wherein the duty cycle pattern of each output differs, with respect ...
11/14/1978
4123741Resistance element for variable resistors
A resistance element for obtaining a continuous and linear output characteristic is obtained by the combination of a zig-zag resistance element and a resistance film of higher resistivity disposed thereover....
10/31/1978
4039994Variable output function potentiometer
A variable output function double bias potentiometer having first and second low resistance zones to provide two bias voltages and a high resistance zone with which output means are in contact to provide an output function which can be freely varied betwe...
08/02/1977
3953820Variable resistor
A variable resistor provided with a mechanism which permits the tap resistance to be varied non-linearly; that is, the mechanism permits a contactor to be displaced at a varying rate in response to the operation of input means at a constant rate....
04/27/1976
 
Sign InRegister
Username  
Password   
forgot password?