US2191292A - Prefocus projection lamp - Google Patents

Prefocus projection lamp Download PDF

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Publication number
US2191292A
US2191292A US244970A US24497038A US2191292A US 2191292 A US2191292 A US 2191292A US 244970 A US244970 A US 244970A US 24497038 A US24497038 A US 24497038A US 2191292 A US2191292 A US 2191292A
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US
United States
Prior art keywords
lamp
socket
lever
prefocus
projection lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US244970A
Inventor
Jr John Livingston Spence
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LEVENTHAL PATENTS Inc
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LEVENTHAL PATENTS Inc
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Publication date
Application filed by LEVENTHAL PATENTS Inc filed Critical LEVENTHAL PATENTS Inc
Priority to US244970A priority Critical patent/US2191292A/en
Application granted granted Critical
Publication of US2191292A publication Critical patent/US2191292A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2046—Positional adjustment of light sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/16—Joints and connections with adjunctive protector, broken parts retainer, repair, assembly or disassembly feature

Definitions

  • This invention relates to projection lamps and more especially to the means for positioning the lamp correctly and with a minimum of effort.
  • Projection lamps are made so that the motions 5 required in putting them into their sockets are three. First, bringing the base to a predetermined registering position with the socket. Second, pressing the lamp toward the base against a contact spring. Third, rotating the lamp to the operating position while it is under pressure.
  • My present invention makes possible the easy performance of this third operation by permitting one hand to apply the pressure while the other imparts the rotatory motion. 'I'he invention also makes possible the removal of the lamp in a simpler fashion than with present methods.
  • Fig. 1 is a plan view showing the lamp in the position before rotation
  • Fig. 2 is a side elevation, partly in section, of Fig. 1
  • Fig. 3 is a plan view showing the lamp after rotation
  • Fig. 4 is a side elevation, partly in section, of Fig. 3
  • Fig. 5 shows the operation with human hands.
  • the lamp I has a iiange 2 which has slotted holes 3 fitted over pins 4. To bring the lamp into place, it is necessary to push lamp I towards socket support 5 and against the pressure of a socket spring not shown. At the same time, the lamp I and its iiange 2 are rotated so that the narrow parts of the slots 3 engage the necks 6 of the pins 4. as shown at Figs. 3 and 4.
  • a notch 1 in the ange 2 receives the tongue 8 o! the lever 9 pivoted at pivot II.
  • Stops I0 may be provided to positively limit the motion of the lever.
  • a spring-contact lamp socket having a base y tting said socket under pressure and a prel0 focusing ange, a notch in the'rim of said flange, means for imparting rotary motion to the lamp while it is under pressure which consists of a pivoted lever supported adjacent to the said socket, said lever having a tongue which fits said 25 notch.
  • a spring-contact lamp socket having a base fitting into said socket and a ange
  • means on said support engageable with said flange upon 30 rotation of the lamp to retain the lamp base in the socket
  • a lever pivoted to said support, the end of said lever and said iiange being interconnected to effect rotation of said lamp by oscillation of said lever.
  • a spring-contact lamp socket a. support therefor, a lamp havinga base tting said socket and a flange member, said iiange member and support having interengageable means rendered effective upon rotation of 40 the lamp to retain the lamp base in the socket, and a. lever member pivoted to said support, one of said members having a notch and the other o1' said members having a tongue ntting thereinto whereby oscillation ofsaid lever eiIects rotation of said lamp.

Description

Feb. 20, 1940. J. l.. SPENCE; JR
PREFOGUS PROJECTION LAMP Filed Dec. 10, 1938 INVENTOR BY i ATTORNEYS 45 Operation is as follows.
Patented Feb. 20, 1940 UNITED STATES PREFOCUS PROJECTION John Livingston Spence, Jr., Brooklyn, N. Y., as-
signor to Leventhal Patents, Inc., New York, N. Y., a corporation oi' Delaware Application December 10, 1938, Serial No. 244,970
. 3 Claims.
This invention relates to projection lamps and more especially to the means for positioning the lamp correctly and with a minimum of effort.
Projection lamps are made so that the motions 5 required in putting them into their sockets are three. First, bringing the base to a predetermined registering position with the socket. Second, pressing the lamp toward the base against a contact spring. Third, rotating the lamp to the operating position while it is under pressure.
When the lamp is small and particularly when the lamp during use must lie between other closely related parts, such as condensers and reflectors, it becomes diicult, if not impossible, vto
5 impart the final motion which is a motion of rotation under pressure. The reason is that the lamp cannot be properly gripped by the ngers.
My present invention makes possible the easy performance of this third operation by permitting one hand to apply the pressure while the other imparts the rotatory motion. 'I'he invention also makes possible the removal of the lamp in a simpler fashion than with present methods.
Other objects, novel features and advantages of this invention will become apparent from the following specication and accompanying drawing wherein Fig. 1 is a plan view showing the lamp in the position before rotation, Fig. 2 is a side elevation, partly in section, of Fig. 1, Fig. 3 is a plan view showing the lamp after rotation, Fig. 4 is a side elevation, partly in section, of Fig. 3, and Fig. 5 shows the operation with human hands.
Referring now to Figs. 1 and 2, the lamp I has a iiange 2 which has slotted holes 3 fitted over pins 4. To bring the lamp into place, it is necessary to push lamp I towards socket support 5 and against the pressure of a socket spring not shown. At the same time, the lamp I and its iiange 2 are rotated so that the narrow parts of the slots 3 engage the necks 6 of the pins 4. as shown at Figs. 3 and 4.
A notch 1 in the ange 2 receives the tongue 8 o! the lever 9 pivoted at pivot II.
One hand grasps the lamp I as at Fig. 5, places the slots 3 over the pins 4 and at the same time brings the notch 'I over the lever tongue 8. The lamp is pushed locked into the narrow neck of the slots. 'Ihe 5 lamp is then correctly in place.
Removal of the lamp involves simply reversing the motion of the lever, only one hand being necessary. The lamp, because of the spring pressure, is partly ejected after it has been rotated to l0 the position shown at Figs. 1 and 2.
Stops I0 may be provided to positively limit the motion of the lever.
The positions of notch and tongue may be reversed, Without in any way departing from the l5 spirit of the invention herein disclosed.
Having described my invention, I claim:
1. In combination, a spring-contact lamp socket, a support therefor, a lamp having a base y tting said socket under pressure and a prel0 focusing ange, a notch in the'rim of said flange, means for imparting rotary motion to the lamp while it is under pressure which consists of a pivoted lever supported adjacent to the said socket, said lever having a tongue which fits said 25 notch.
2. In combination, a spring-contact lamp socket, a support therefor, a lamp having a base fitting into said socket and a ange, means on said support engageable with said flange upon 30 rotation of the lamp to retain the lamp base in the socket, and a lever pivoted to said support, the end of said lever and said iiange being interconnected to effect rotation of said lamp by oscillation of said lever. 35
3. In combination, a. spring-contact lamp socket, a. support therefor, a lamp havinga base tting said socket and a flange member, said iiange member and support having interengageable means rendered effective upon rotation of 40 the lamp to retain the lamp base in the socket, and a. lever member pivoted to said support, one of said members having a notch and the other o1' said members having a tongue ntting thereinto whereby oscillation ofsaid lever eiIects rotation of said lamp.
JOHN m'vmos'roN sPnNcE. Jn.
US244970A 1938-12-10 1938-12-10 Prefocus projection lamp Expired - Lifetime US2191292A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471190A (en) * 1946-08-30 1949-05-24 Rca Corp Lamp socket
US2655797A (en) * 1949-03-21 1953-10-20 Gerald A Hale Timer apparatus for parking meters
US2657366A (en) * 1952-10-31 1953-10-27 Vry Corp De Mechanism for facilitating the removal of a lamp from its socket
US3054980A (en) * 1958-03-20 1962-09-18 Bryant Electric Co Wiring device
US4283101A (en) * 1979-08-06 1981-08-11 Indicator Controls Corp. Rotatable lamp socket for incandescent pedestrian traffic signal, or the like
US4409749A (en) * 1981-09-08 1983-10-18 Hamu Kaino J Stretch frame
US5347673A (en) * 1992-10-01 1994-09-20 Black & Decker Inc. Quick change pad assembly for orbital polisher
US5491618A (en) * 1993-08-20 1996-02-13 Lights Of America, Inc. Light fixture
WO2004046610A1 (en) * 2002-11-15 2004-06-03 Robe Show Lighting S.R.O. Attachment means for lighting equipment
US20100197412A1 (en) * 2009-01-30 2010-08-05 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Torque converter leaf spring connections

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471190A (en) * 1946-08-30 1949-05-24 Rca Corp Lamp socket
US2655797A (en) * 1949-03-21 1953-10-20 Gerald A Hale Timer apparatus for parking meters
US2657366A (en) * 1952-10-31 1953-10-27 Vry Corp De Mechanism for facilitating the removal of a lamp from its socket
US3054980A (en) * 1958-03-20 1962-09-18 Bryant Electric Co Wiring device
US4283101A (en) * 1979-08-06 1981-08-11 Indicator Controls Corp. Rotatable lamp socket for incandescent pedestrian traffic signal, or the like
US4409749A (en) * 1981-09-08 1983-10-18 Hamu Kaino J Stretch frame
US5347673A (en) * 1992-10-01 1994-09-20 Black & Decker Inc. Quick change pad assembly for orbital polisher
US5491618A (en) * 1993-08-20 1996-02-13 Lights Of America, Inc. Light fixture
WO2004046610A1 (en) * 2002-11-15 2004-06-03 Robe Show Lighting S.R.O. Attachment means for lighting equipment
US20100197412A1 (en) * 2009-01-30 2010-08-05 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Torque converter leaf spring connections
US8328647B2 (en) 2009-01-30 2012-12-11 Schaeffler Technologies AG & Co. KG Torque converter leaf spring connections

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