US3226521A - Panel mounted adjustable pressure electrical contact - Google Patents

Panel mounted adjustable pressure electrical contact Download PDF

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Publication number
US3226521A
US3226521A US294306A US29430663A US3226521A US 3226521 A US3226521 A US 3226521A US 294306 A US294306 A US 294306A US 29430663 A US29430663 A US 29430663A US 3226521 A US3226521 A US 3226521A
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Prior art keywords
electrical contact
panel
contact
rotatable
pressure
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Expired - Lifetime
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US294306A
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Motegi Ryukichi
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Fujitsu Ltd
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Fujitsu Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position

Definitions

  • This invention relates to a panel mounted ad ustable pressure electrical contact. More particularly, the invention relates to a panel mounted adjustable pressure electrical contact in a small-sized television tuner in which the oscillating coil is switched by a rotatable disc.
  • the principal object of the present invention is to provide a new and improved panel mounted adjustable pressure electrical contact.
  • FIG. 1 is an embodiment of a known type of rotatable electrical contact
  • FIG. 2 is an exploded perspective presentation of an embodiment of the panel mounted adjustable pressure electrical contact of the present inventon.
  • FIG. 3 is a view, partly in section, of the embodiment of FIG. 2 in assembled condition.
  • the small contact is pressed by a helical spring from the opposite side of the rotatable disc contact, and it is possible to adjust the helical spring pressure from the front panel of the tuner.
  • FIG. 2 shows the fixed contact, 4 insulator piece, 5 pressing spring, 6 boss, 7 contact pressure adjusting screw and 8 insulator base member.
  • the panel mounted adjustable pressure electrical contact of the present invention comprises these 6 components, which are set up and attached as shown in FIG. 3.
  • a rotatable disc 10 includes rotary contacts 9 positioned on the peripheral surface of said disc.
  • the rotatable disc 11 is affixed to a shaft 14 and rotates with said shaft.
  • Oscillating coils 12 and coil adjusting screws 13 are mounted on the rotatable disc 10.
  • Oscillating coils 12 are electrically connected to rotary contacts 9.
  • fixed contact 3 and rotary contacts 9 are placed in electrical contact with each other and a lead wire (not shown) from the fixed contact 3 is connected to the oscillator circuit.
  • the insulator piece 4, the fixed contact 3, pressing spring 5, boss 6 and contact pressure adjusting screw 7 are assembled in a cavity of said insulator base member 8.
  • the said contact pressure adjuting screw 7 is threaded in the insulator base member 8 and abuts the boss 6.
  • the helical spring 5 is supported by the projection e of the insulator piece 4 and the boss 6.
  • Fixed contact 3 is fixed by a bolt through the hole a of insulator base member 8 and pressed into electrical contact with the rotary contacts 9 by the insulator piece 4 which is in turn urged toward the contacts 9 by the helical spring 5.
  • the pressure applied by the spring 5 is adjusted by the boss 6 which is shifted by the contact pressure adjusting screw 7 which is in turn threaded in hole 0.
  • the adjustable pressure electrical contact of the present invention is mounted on the tuner front panel 11 by fixed screw 15 threaded in a tap d of the insulator base member 8.
  • the contact pressure adjusting screw is adjusted from the front through the hole 16 of the front panel 11 and controls the contact pressure between fixed contact 3 and rotary contacts 9.
  • An advantage of the panel mounted adjustable pressure electrical contact of the present invention is that it may use contact material which has small elasticity but high conductivity.
  • Another advantage of the electrical contact of the present invention is that the operator is able to control the contact pressure between the fixed contact 3 and the rotary contacts 9 with ease by means of adjusting the contact pressure adjusting screw 7 from the front panel of the tuner. Furthermore, poor electrical contact does not occur because in the structure of this invention the elasticity of the contact itself has no relation to the force needed for contact. Also, the switching contact mechanism may be of such small size that it never influences the arrangement of the other components.
  • a panel mounted adjustable pressure electrical contact for electrically contacting a rotatable electrical contact positioned in proximity with a panel, said adjustable pressure electrical contact comprising a panel;
  • a rotatable electrical contact positioned in proximity with said panel
  • pressure adjusting means mounted in said base means in contact with the other end of said spring means for adjusting the pressure applied by said spring means to said fixed electrical contact, said pressure adjusting means being positioned in close proximity with said panel and being operable at said panel.
  • a panel mounted adjustable pressure electrical contact for electrically contacting a rotatable electrical contact of a rotatable disc positioned in operative proximity with an equipment panel having an equipment side and an opposite out side, said adjustable pressure electrical contact comprising an equipment panel;
  • helical spring means supported by said base means in contact at one end with said fixed electrical contact means, said spring means applying pressure to said fixed electrical contact in a direction toward said rotatable electrical contact thereby urging said fixed and rotatable contacts into electrical contact with each other, said helical spring means comprising an electrical insulating member abutting said fixed electrical contact, a boss movably mounted in said base means spaced from said electrical insulating member and a helical spring positioned between and supported by said electrical insulating member and said boss; and
  • presure adjusting means mounted in said base means in contact with said boss at the other end of said spring means for adjusting the pressure applied by said spring means to said fixed electrical contact, said pressure adjusting means being positioned in close proximity with said equipment panel and being operable from the out side of said panel.
  • a panel mounted adjustable pressure electrical contact for electrically contacting a rotatable electrical contact of'a rotatable disc of television tuning equipment including an oscillating coil electrically connected to said rotatable electrical contact, said rotatable electrical contact being positioned in operative proximity with an equipment panel having an equipment side and an opposite out side, said adjustable pressure electrical contact comprising an equipment panel;
  • helical spring means supported by said base means in contact at one end with said fixed electrical contact means, said spring means applying pressure to said fixed electrical contact in a direction toward said rotatable electrical contact thereby urging said fixed and rotatable contacts into electrical contact with each other, said helical spring means comprising an electrical insulating member abutting said fixed electrical contact, a boss' movably mounted in said base means spaced from said electrical insulating member and a helical spring positioned between and supported by said electrical insulating member and said boss; and
  • pressure adjusting means mounted in said base means in contact with said boss at the other end of said spring means for adjusting the pressure applied by said spring means to said fixed electrical contact, said pressure adjusting means being positioned in close proximity with said equipment panel and being operable from the out side of said panel.

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Description

D 1965 RYUKICHI MOTEGI 3,226,521
PANEL MOUNTED ADJUSTABLE PRESSURE ELECTRICAL CONTACT Filed July 11, 1963 FIG.|
PRIOR ART :2; 3 7 F G. 3 F
United 1 This invention relates to a panel mounted ad ustable pressure electrical contact. More particularly, the invention relates to a panel mounted adjustable pressure electrical contact in a small-sized television tuner in which the oscillating coil is switched by a rotatable disc.
The principal object of the present invention is to provide a new and improved panel mounted adjustable pressure electrical contact.
In order that the present invention may be readily carried into eifect, it will now be described with reference to the accompanying drawing, wherein:
FIG. 1 is an embodiment of a known type of rotatable electrical contact;
FIG. 2 is an exploded perspective presentation of an embodiment of the panel mounted adjustable pressure electrical contact of the present inventon; and
FIG. 3 is a view, partly in section, of the embodiment of FIG. 2 in assembled condition.
In the contact mechanism of a rotatable tuner of known type, as shown in FIG. 1, silver ball contact 2 is planted in the insulator board 1 and has contact with the spring contact 3 spaced separately. Wear and exhaustion of spring and other inconveniences sometimes cause poor electrical contact. In order to make a tuner small sized, it is advisable to utilize a rotatable disc.
In a small-sized tuner in which the space is restricted, contacts are made small, so that defects similar to those of known type arise.
In this invention, in order to eliminate these defects, the small contact is pressed by a helical spring from the opposite side of the rotatable disc contact, and it is possible to adjust the helical spring pressure from the front panel of the tuner.
In FIG. 2, 3 shows the fixed contact, 4 insulator piece, 5 pressing spring, 6 boss, 7 contact pressure adjusting screw and 8 insulator base member. The panel mounted adjustable pressure electrical contact of the present invention comprises these 6 components, which are set up and attached as shown in FIG. 3.
In FIG. 3, a rotatable disc 10 includes rotary contacts 9 positioned on the peripheral surface of said disc. The rotatable disc 11 is affixed to a shaft 14 and rotates with said shaft. Oscillating coils 12 and coil adjusting screws 13 are mounted on the rotatable disc 10. Oscillating coils 12 are electrically connected to rotary contacts 9. In order to connect said oscillating coils to the oscillator circuit, fixed contact 3 and rotary contacts 9 are placed in electrical contact with each other and a lead wire (not shown) from the fixed contact 3 is connected to the oscillator circuit.
The insulator piece 4, the fixed contact 3, pressing spring 5, boss 6 and contact pressure adjusting screw 7 are assembled in a cavity of said insulator base member 8. The said contact pressure adjuting screw 7 is threaded in the insulator base member 8 and abuts the boss 6. The helical spring 5 is supported by the projection e of the insulator piece 4 and the boss 6.
Fixed contact 3 is fixed by a bolt through the hole a of insulator base member 8 and pressed into electrical contact with the rotary contacts 9 by the insulator piece 4 which is in turn urged toward the contacts 9 by the helical spring 5. The pressure applied by the spring 5 is adjusted by the boss 6 which is shifted by the contact pressure adjusting screw 7 which is in turn threaded in hole 0. The adjustable pressure electrical contact of the present invention is mounted on the tuner front panel 11 by fixed screw 15 threaded in a tap d of the insulator base member 8. The contact pressure adjusting screw is adjusted from the front through the hole 16 of the front panel 11 and controls the contact pressure between fixed contact 3 and rotary contacts 9.
An advantage of the panel mounted adjustable pressure electrical contact of the present invention is that it may use contact material which has small elasticity but high conductivity. Another advantage of the electrical contact of the present invention is that the operator is able to control the contact pressure between the fixed contact 3 and the rotary contacts 9 with ease by means of adjusting the contact pressure adjusting screw 7 from the front panel of the tuner. Furthermore, poor electrical contact does not occur because in the structure of this invention the elasticity of the contact itself has no relation to the force needed for contact. Also, the switching contact mechanism may be of such small size that it never influences the arrangement of the other components.
What is claimed is:
1. A panel mounted adjustable pressure electrical contact for electrically contacting a rotatable electrical contact positioned in proximity with a panel, said adjustable pressure electrical contact comprising a panel;
a rotatable electrical contact positioned in proximity with said panel;
base means of electrically insulating material afiixed to said panel;
fixed electrical contact means supported by said base means in close proximity with said rotatable electrical contact;
helical spring means supported by said base means in contact at one end with said fixed electrical contact means, said spring means applying pressure to said fixed electrical contact in a direction toward said rotatable electrical contact thereby urging said fixed and rotatable contacts into electrical contact with each other; and
pressure adjusting means mounted in said base means in contact with the other end of said spring means for adjusting the pressure applied by said spring means to said fixed electrical contact, said pressure adjusting means being positioned in close proximity with said panel and being operable at said panel.
2. A panel mounted adjustable pressure electrical contact for electrically contacting a rotatable electrical contact of a rotatable disc positioned in operative proximity with an equipment panel having an equipment side and an opposite out side, said adjustable pressure electrical contact comprising an equipment panel;
a rotatable electrical contact positioned in operative proximity with said equipment panel;
base means for electrically insulating material affixed to the equipment side of said panel;
fixed electrical contact means supported by said base means in close proximity with said rotatable electrical contact;
helical spring means supported by said base means in contact at one end with said fixed electrical contact means, said spring means applying pressure to said fixed electrical contact in a direction toward said rotatable electrical contact thereby urging said fixed and rotatable contacts into electrical contact with each other, said helical spring means comprising an electrical insulating member abutting said fixed electrical contact, a boss movably mounted in said base means spaced from said electrical insulating member and a helical spring positioned between and supported by said electrical insulating member and said boss; and
presure adjusting means mounted in said base means in contact with said boss at the other end of said spring means for adjusting the pressure applied by said spring means to said fixed electrical contact, said pressure adjusting means being positioned in close proximity with said equipment panel and being operable from the out side of said panel.
3. A panel mounted adjustable pressure electrical contact as claimed in claim 2, wherein said equipment panel has an aperture formed therethrough from the equipment side to the out side thereof, and wherein said pressure adjusting means comprises an elongated member mounted in said base means and extending through the aperture formed through said panel.
4. A panel mounted adjustable pressure electrical contact as claimed in claim 3, wherein said pressure adjusting means comprises a threaded elongated member threadedly engaged with said base means and extending through the aperture formed through said panel, one end of said elongated member being in contact with said boss and the other end being rotatable about the axis of said elongated member from the out side of said panel.
5. A panel mounted adjustable pressure electrical contact for electrically contacting a rotatable electrical contact of'a rotatable disc of television tuning equipment including an oscillating coil electrically connected to said rotatable electrical contact, said rotatable electrical contact being positioned in operative proximity with an equipment panel having an equipment side and an opposite out side, said adjustable pressure electrical contact comprising an equipment panel;
a rotatable electrical contact positioned in operative proximity with said equipment panel;
base means of electrically insulating material aflixed to the equipment side of said panel;
fixed electrical contact means supported by said base means in close proximity with said rotatable electrical contact;
helical spring means supported by said base means in contact at one end with said fixed electrical contact means, said spring means applying pressure to said fixed electrical contact in a direction toward said rotatable electrical contact thereby urging said fixed and rotatable contacts into electrical contact with each other, said helical spring means comprising an electrical insulating member abutting said fixed electrical contact, a boss' movably mounted in said base means spaced from said electrical insulating member and a helical spring positioned between and supported by said electrical insulating member and said boss; and
pressure adjusting means mounted in said base means in contact with said boss at the other end of said spring means for adjusting the pressure applied by said spring means to said fixed electrical contact, said pressure adjusting means being positioned in close proximity with said equipment panel and being operable from the out side of said panel.
References Cited by the Examiner UNITED STATES PATENTS 2,914,625 11/1959 Heveran 200--l66 KATHLEEN H. CLAFFY, Primary Examiner.
BERNARD A GILHEANY, Examiner.
HERMAN O. JONES, Assistant Examiner.

Claims (1)

1. A PANEL MOUNTED ADJUSTABLE PRESSURE ELECTRICAL CONTACT FOR ELECTRICALLY CONTACTING A ROTATABLE ELECTRICAL CONTACT POSITIONED IN PROXIMITY WITH APNEL, SAID AJUSTABLE PRESSURE ELECTRICAL CONTACT COMPRISING A PANEL; A ROTATABLE ELECTRICAL CONTACT POSITIONED IN PROXIMITY WITH SAID PANEL; BASE MEANS OF ELECTRICALLY INSULATING MATERIAL AFFIXED TO SAID PANEL; FIXED ELECTRICAL CONTACT MEANS SUPPORTED BY SAID BASE MEANS IN THE CLOSE PROXIMITY WITH SAID ROTATABLE ELECTRICAL CONTACT; HELICAL SPRING MEANS SUPPORTED BY SAID BASE MEANS IN CONTACT AT ONE END WITH SAID FIXED ELECTRICAL CONTACT MEANS, SAID SPRING MEANS APPLYING PRESSURE TO SAID FIXED ELECTRICAL CONTACT IN A DIRECTION TOWARD SAID ROTATABLE ELECTRICAL CONTACTS INTO ELECTRICAL CONTACT WITH AND ROTATABLE CONTACTS INTO ELECTRICAL CONTACT WITH EACH OTHER; AND PRESSURE ADJUSTING MEANS MOUNTED IN SAID BASE MEANS IN CONTACT WITH THE OTHER END OF SAID SPRING MEANS FOR ADJUSTING THE PRESSURE APPLIED BY SAID SPRING MEANS TO SAID FIXED ELECTRICAL CONTACT, SAID PRESSURE ADJUSTING MEANS BEING POSITIONED IN CLOSE PROXIMITY WITH SAID PANEL AND BEING OPERABLE AT SAID PANEL.
US294306A 1962-07-12 1963-07-11 Panel mounted adjustable pressure electrical contact Expired - Lifetime US3226521A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395920A (en) * 1981-01-13 1983-08-02 Audio Dynamics Corporation Digital stylus force gauge
US11469057B2 (en) * 2015-12-30 2022-10-11 Schneider Electric Industries Sas Adjustable contactor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914625A (en) * 1957-02-04 1959-11-24 Shurhit Products Inc Ignition breaker assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914625A (en) * 1957-02-04 1959-11-24 Shurhit Products Inc Ignition breaker assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4395920A (en) * 1981-01-13 1983-08-02 Audio Dynamics Corporation Digital stylus force gauge
US11469057B2 (en) * 2015-12-30 2022-10-11 Schneider Electric Industries Sas Adjustable contactor

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