Browse Prior Art Database

ELECTROSTATIC VOLTMETER

IP.com Disclosure Number: IPCOM000023600D
Original Publication Date: 1978-Jun-30
Included in the Prior Art Database: 2004-Mar-31
Document File: 6 page(s) / 972K

Publishing Venue

Xerox Disclosure Journal

Abstract

Apparatus is shown for use in measuring the electrostatic charge potentials on a surface. It is especially useful as a technician-s tool in servicing xerographic machines having a charged photoreceptor and other components whose electrical potential must be measured and periodically changed in order to optimize copy quality.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Page 1 of 6

XEROX DISCLOSURE JOURNAL

ELECTROSTATIC VOLTMETER
Louis W, Schaeffer
David R, Shuey
Robert J, Slomencski

Proposed Classification
U~S~CL 324/72
Into Cl. GOir 31/02

20

~5032

METER GRD.

32

r~ ~

M ~

~

1ft

I liii

FIG. /

Volume 3 Number 3 May/June 1978 175

[This page contains 1 picture or other non-text object]

Page 2 of 6

ELECTROSTATIC VOLTMETER (Cont'd)

     XEROX DISCLOSURE JOURNAL
Volume 3 Number 3 May/June 1978

76

36/2 ~

~62 52 58

FIG, 2

FIG. 3

176

[This page contains 1 picture or other non-text object]

Page 3 of 6

ELECTROSTATIC VOLTMETER (Cont'd)

     XEROX DISCLOSURE JOURNAL
Volume 3 Number 3 May/June 1978

0

177

[This page contains 1 picture or other non-text object]

Page 4 of 6

ELECTROSTATIC VOLTMETER (Cont~d)

Apparatus is shown for use in measuring the electrostatic
charge potentials on a surface. It is especially useful as a
technician~s tool in servicing xerographic machines having a
charged photoreceptor and other components whose electrical
potential must be measured and periodically changed in order
to optimize copy quality.

Referring to Figure 1, the electrometer includes a housing 10,
including means 16 for clipping the housing 10 onto lower
portions of a voltmeter 14. A probe 12 is connected to associ~
ated circuitry within housing 10 by a cord 36. Housing 10
includes a spindle 38 around which cord 36 can be wound for
storage purposes. The probe 12 includes windows 54 and 56 in
inner tube 50 and outer tube 52, respectively, as can be seen
most clearly in Figure 2, The tubes are slidably mounted
together and cooperate with a pin 62 and slot 64 arrangement
which cause concurrent rotation of the tubes as they are
pushed together or pulled apart longitudinally. When the
tubes are pulled apart, windows 54 and 56 are automatically
aligned to expose an inner charge receiving element 58 insula~
tingly mounted within probe 12 by spacer 60. When the tubes
are pushed together, the windows become misaligned to protect
element 58 and its associated circuitry from adverse con-S
ditions. Probe 12 can be stored in a compartment (not shown)
in the back of the housing 10.

An adapter 90 shown in Figure 3 receives the probe 12 to permit
the electrometer to measure electrical potentials of compon-
ents that, unlike the photoreceptor, can be touched phys-
ically. Needle 94 contacts the component whose potential is
desired with that potential being conductively transferred to
the shell 92 of adapter 90. Charge receiving element 58 of
probe 12 can thus measure the charg...