Rotatably adjustable trouble lamp shield

• US 4,298,922 A
• Filed: 11/02/1979
• Issued: 11/03/1981
• Est. Priority Date: 11/02/1979
• Status: Expired due to Term

• Current Assignee: Cret E. Hardwick
• Original Assignee: Cret E. Hardwick
• Inventors: Hardwick, Cret E.
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US06/090,586
• Time in Patent Office: 732 Days
• Field of Search: 362/376, 362/396, 362/427
• US Class Current: 362/376
• CPC Class Codes: F21L 14/02 capable of hand-held use, e.g. inspection lamps
• CPC Class Codes: F21V 15/02 Cages
• CPC Class Codes: F21V 21/08 Devices for easy attachment to any desired place, e.g. clip, clamp, magnet

Abstract

A rotatably adjustable light shield for shielding and suspending a portable trouble lamp is disclosed herein. The light shield generally comprises a cylindrical shield member, a mounting means attached to the bottom end of the shield member for mounting the shield member onto a trouble lamp, and a rotatably adjustable suspension means mounted on top of the shield member for providing a rotatably adjustable suspension mount for the shield. The suspension mount includes a plate having a circular array of detent cavities, a detent ball retainer rotatably mounted over the plate and having at least one detent ball receivable into each of the detent cavities in the plate, and a suspension hook assembly mounted onto the detent ball retainer for suspending the trouble lamp. The detent ball in the detent ball retainer serves both to retain the light beam in any of the angular positions associated with the circular array of detent cavities, and to transmit a tactile indication of the amount of rotary adjustment made when the handle of the trouble lamp connected to the shield is manually rotated relative to the suspension mount.

Claims

1. A rotatably adjustable light shield for shielding and suspending a portable trouble lamp of the type having an elongated handle with an electric light mounted on one end, comprising:

(a) a shield member for substantially enclosing said electric light of said lamp, said shield member having a top end and a bottom end and an aperture on one side for the transmission of light therethrough;

(b) a mounting means attached to the bottom end of said shield member for mounting said shield member onto said light bearing end of said trouble light handle;

(c) a rotatably adjustable suspension means mounted onto the top end of said shield member for providing a rotatably adjustable suspension mount for said shield member, including;

(i) a plate having a circular array of regularly spaced detent cavities mounted onto the top end of said light shield;

(ii) a detent ball retainer rotatably mounted over said plate and having at least one detent ball receivable into each of said detent cavities for retaining said light shield in any of the angular positions associated with each of said detent cavities and for transmitting a tactile indication of the amount of rotary adjustment made when said light shield is mounted onto a trouble lamp and said handle of said trouble lamp is manually rotated relative to said suspension means, and

(iii) a suspension hook assembly mounted onto said detent ball retainer for suspending said trouble lamp.

2. The rotatably adjustable light shield of claim 1 wherein said top end of said shield member completely covers the top of said electric light of said trouble lamp when said shield is mounted onto said lamp.

3. The rotatably adjustable light shield of claim 2 wherein said shield member further includes a cage door member pivotably swingable over said shield member aperture.

4. The rotatably adjustable light shield of claim 2 further including a spotlight attachment mountable over said shield member aperture.

5. The rotatably adjustable light shield of claim 1 wherein the interior surface of said light shield member is coated with a reflective coating for concentrating the radiation emitted by said light bulb out of the shield member aperture.

6. The rotatably adjustable light shield of claim 1 wherein said light bearing end of said trouble lamp includes a neck, and said mounting means attached to the bottom end of said shield member includes a collar, a split ring disposed within and attached to said collar, and at least one set screw in said collar abutting said split ring for tightening said ring around said neck of said trouble lamp.

7. The rotatably adjustable light shield of claim 1 wherein said top end of said shield member, said plate and said detent ball retainer each include a bore, and said light shield further includes a bolt having a head and a threaded end received within said bores for rotatably mounting said detent ball retainer onto said plate.

8. The rotatably adjustable light shield of claim 7 further including a spring heliocentrically disposed around said threaded end of said bolt, and a pair of lock nuts threadedly engaged to said end of said bolt for adjusting the amount of frictional resistance between said detent ball retainer and said plate.

9. The rotatably adjustable light shield of claim 8 wherein said detent cavities in said plate are angularly spaced 30°

apart.

10. The rotatably adjustable light shield of claim 9 wherein said detent ball retainer includes two spring loaded detent balls, each of said spring loaded detent balls being receivable into one of said detent cavities when said handle of said trouble lamp connected to said shield is manually rotated.

11. The rotatably adjustable light shield of claim 10 wherein said two spring loaded detent balls are linearly opposed to one another relative to said bore in said plate.

12. The rotatably adjustable light shield of claim 11 wherein said suspension hook assembly includes a pair of hooks for stabilizing said lamp when said lamp is suspended.